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WO2007044993A2 - Use and production of storage-stable neutral metalloprotease - Google Patents

Use and production of storage-stable neutral metalloprotease Download PDF

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Publication number
WO2007044993A2
WO2007044993A2 PCT/US2006/040695 US2006040695W WO2007044993A2 WO 2007044993 A2 WO2007044993 A2 WO 2007044993A2 US 2006040695 W US2006040695 W US 2006040695W WO 2007044993 A2 WO2007044993 A2 WO 2007044993A2
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WO
WIPO (PCT)
Prior art keywords
neutral metalloprotease
seq
npre
neutral
metalloprotease
Prior art date
Application number
PCT/US2006/040695
Other languages
French (fr)
Other versions
WO2007044993A3 (en
Inventor
Andrew Shaw
Louise Wallace
David A. Estell
Ronald Hommes
Sang-Kyu Lee
Eugene Steven Sadlowski
Hiroshi Oh
Original Assignee
Genencor International, Inc.
The Procter And Gamble Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=37805929&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2007044993(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to CN200680045537.3A priority Critical patent/CN101341248B/en
Priority to AU2006299783A priority patent/AU2006299783B2/en
Priority to CA2624977A priority patent/CA2624977C/en
Priority to BRPI0617392-6A priority patent/BRPI0617392A2/en
Priority to DK06826175.9T priority patent/DK1934340T3/en
Application filed by Genencor International, Inc., The Procter And Gamble Company filed Critical Genencor International, Inc.
Priority to KR1020137034836A priority patent/KR20140027423A/en
Priority to JP2008535799A priority patent/JP5507843B2/en
Priority to EP06826175.9A priority patent/EP1934340B1/en
Publication of WO2007044993A2 publication Critical patent/WO2007044993A2/en
Publication of WO2007044993A3 publication Critical patent/WO2007044993A3/en
Priority to HK09103444.7A priority patent/HK1127368A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
    • C12N9/14—Hydrolases (3)
    • C12N9/48—Hydrolases (3) acting on peptide bonds (3.4)
    • C12N9/50—Proteinases, e.g. Endopeptidases (3.4.21-3.4.25)
    • C12N9/52—Proteinases, e.g. Endopeptidases (3.4.21-3.4.25) derived from bacteria or Archaea
    • C12N9/54—Proteinases, e.g. Endopeptidases (3.4.21-3.4.25) derived from bacteria or Archaea bacteria being Bacillus
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02—Anionic compounds
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/38—Products with no well-defined composition, e.g. natural products
    • C11D3/386—Preparations containing enzymes, e.g. protease or amylase
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/38—Products with no well-defined composition, e.g. natural products
    • C11D3/386—Preparations containing enzymes, e.g. protease or amylase
    • C11D3/38663—Stabilised liquid enzyme compositions
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
    • C12N9/96—Stabilising an enzyme by forming an adduct or a composition; Forming enzyme conjugates
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
    • C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
    • C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
    • C12Q1/6876—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12Y—ENZYMES
    • C12Y304/00—Hydrolases acting on peptide bonds, i.e. peptidases (3.4)
    • C12Y304/24—Metalloendopeptidases (3.4.24)
    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
    • C14C11/00—Surface finishing of leather
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
    • D06M16/003—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic with enzymes or microorganisms

Definitions

  • the present invention provides methods and compositions comprising at least one neutral metalloprotease enzyme that has improved storage stability.
  • the neutral metalloprotease finds use in cleaning and other applications.
  • the present invention provides methods and compositions comprising neutral metalloprotease(s) obtained from Bacillus sp.
  • the neutral metalloprotease is obtained from B. amyloliquefaciOens.
  • the neutral metalloprotease is a variant of the B. amyloliquefaciens neutral metalloprotease.
  • the neutral metalloprotease is a homolog of the the B. amyloliquefaciens neutral metalloprotease.
  • the present invention finds particular use in applications including, but not limited to cleaning, bleaching and disinfecting.
  • Detergent and other cleaning compositions typically include a complex combination of active ingredients.
  • cleaning products include a surfactant system, enzymes for cleaning, bleaching agents, builders, suds suppressors, soil-suspending agents, soil-release agents, optical brighteners, softening agents, dispersants, dye transfer inhibition compounds, abrasives, bactericides, and perfumes.
  • stains that are difficult to completely remove.
  • residue build-up which results in discoloration ⁇ e.g., yellowing) and diminished aesthetics due to incomplete cleaning.
  • stains are composed of complex mixtures of fibrous material, mainly incorporating carbohydrates and carbohydrate derivatives, fiber, and cell wall components (e.g., plant material, wood, mud/clay based soil, and fruit).
  • carbohydrate derivatives e.g., plant material, wood, mud/clay based soil, and fruit.
  • cell wall components e.g., plant material, wood, mud/clay based soil, and fruit.
  • stains present difficult challenges to the formulation and use of cleaning compositions.
  • colored garments tend to wear and show appearance losses. A portion of this color loss is due to abrasion in the laundering process, particularly in automated washing and drying machines.
  • tensile strength loss of fabric appears to be an unavoidable result of mechanical and chemical action due to use, wearing, and/or washing and drying.
  • a means to efficiently and effectively wash colored garments so that these appearance losses are minimized is needed.
  • the present invention provides methods and compositions comprising at least one neutral metalloprotease enzyme that has improved storage stability.
  • the neutral metalloprotease finds use in cleaning and other applications.
  • the present invention provides methods and compositions comprising neutral metalloprotease(s) obtained from Bacillus sp.
  • the neutral metalloprotease is obtained from B. amyloliquefaciens.
  • the neutral metalloprotease is a variant of the B. amyloliquefaciens neutral metalloprotease.
  • the neutral metalloprotease is a homolog of the the B. amyloliquefaciens neutral metalloprotease.
  • the present invention finds particular use in applications including, but not limited to cleaning, bleaching and disinfecting.
  • the present invention provides novel neutral metalloproteases, novel genetic material encoding the neutral metalloprotease enzymes, and neutral metalloprotease proteins obtained from Bacillus sp., in particular, B. amyloliquefaciens, and variant proteins developed therefrom.
  • the present invention provides neutral metalloprotease compositions obtained from Bacillus sp., particularly B. amyloliquefaciens, DNA encoding the protease, vectors comprising the DNA encoding the neutral metalloprotease, host cells transformed with the vector DNA, and an enzyme produced by the host cells.
  • the present invention also provides cleaning compositions (e.g., detergent compositions), animal feed compositions, and textile and leather processing compositions comprising neutral metalloprotease(s) obtained from a Bacillus species, in particular, B. amyloliquefaciens.
  • cleaning compositions e.g., detergent compositions
  • animal feed compositions e.g., animal feed compositions
  • textile and leather processing compositions comprising neutral metalloprotease(s) obtained from a Bacillus species, in particular, B. amyloliquefaciens.
  • the present invention provides isolated neutral metalloproteases obtained from a Bacillus species, in particular, B. amyloliquefaciens.
  • the neutral metalloprotease comprises the amino acid sequence set forth in SEQ ID NOS:3, 4 or 18.
  • the present invention provides isolated neutral metalloproteases comprising at least 45% amino acid identity with the neutral metalloprotease comprising SEQ ID NOS:3, 4 or 18.
  • the isolated neutral metalloproteases comprise at least 50% identity, preferably at least 55%, more preferably at least 60%, yet more preferably at least 65%, even more preferably at least 70%, more preferably at least 75%, still more preferably at least 80%, more preferably 85%, yet more preferably 90%, even more preferably at least 95%, and most preferably 99% identity with the neutral metalloprotease comprising SEQ ID NO:3, 4 or 18.
  • the present invention also provides isolated neutral metalloproteases having immunological cross-reactivity with the metalloprotease obtained from B. amyloliquefaciens, as well as compositions comprising these neutral metalloproteases.
  • the neutral metalloproteases have immunological cross-reactivity with neutral metalloproteases comprising the amino acid sequence set forth in SEQ ID NOS:3, 4 or 18.
  • the neutral metalloproteases have cross-reactivity with fragments ⁇ i.e., portions) of the neutral metalloprotease of B. amyloliquefaciens, and/or neutral metalloprotease comprising the amino acid sequence set forth in SEQ ID NOS:3, 4 or 18.
  • the present invention encompass fragments ⁇ e.g., epitopes) of the B. amyloliquefaciens metalloprotease that stimulate an immune response in animals (including, but not limited to humans) and/or are recognized by antibodies of any class.
  • the present invention further encompasses epitopes on metalloproteases that are cross-reactive with B. amyloliquefaciens metalloprotease epitopes.
  • the metalloprotease epitopes are recognized by antibodies, but do not stimulate an immune response in animals (including, but not limited to humans), while in other embodiments, the metalloprotease epitopes stimulate an immune response in at least one animal species (including, but not limited to humans) and are recognized by antibodies of any class.
  • the present invention also provides means and compositions for identifying and assessing cross-reactive epitopes.
  • the present invention provides the amino acid sequences set forth in SEQ ID NOS:3, 4 or 18. In alternative embodiments, the sequence comprises substitutions at least one amino acid position in SEQ ID NOS:3, 4 or 18. In some particularly preferred alternative embodiments, the sequence comprises substitutions at least one amino acid position in SEQ ID NO: 18. In some preferred embodiments, the present invention provides neutral metalloprotease variants having an amino acid sequence comprising at least one substitution of an amino acid made at a position equivalent to a position in a B. amyloliquefaciens neutral metalloprotease comprising the amino acid sequence set forth in SEQ ID NOS:3, 4 or 18.
  • the.present invention provides neutral metalloprotease variants having an amino acid sequence comprising at least one substitution of an amino acid made at a position equivalent to a position in a B. amyloliquefaciens neutral metalloprotease comprising the amino acid sequence set forth in SEQ ID NO: 18.
  • the present invention provides neutral metalloprotease variants having an amino acid sequence comprising at least one substitution of an amino acid made at a position equivalent to a position in a B. amyloliquefaciens neutral metalloprotease comprising at least a portion of SEQ ID NOS:3, 4 or 18.
  • the neutral metalloproteases comprise multiple mutations in at least a portion of SEQ ID NOS:3, 4 or 18.
  • the neutral metalloproteases comprise multiple mutations in at least a portion of SEQ ID NO: 18.
  • the present invention provides the amino acid sequence set forth in SEQ ID NO: 18.
  • the sequence comprises substitutions at least one amino acid position in SEQ ID NO:18.
  • the present invention provides neutral metalloprotease variants having an amino acid sequence comprising at least one substitution of an amino acid made at a position equivalent to a position in a B. amyloliquefaciens neutral metalloprotease comprising the amino acid sequence set forth in SEQ ID NO:18.
  • the present invention provides neutral metalloprotease variants having an amino acid sequence comprising at least one substitution of an amino acid made at a position equivalent to a position in a B. amyloliquefaciens neutral metalloprotease comprising at least a portion of SEQ ID NO:18.
  • the neutral metalloproteases comprise multiple mutations in at least a portion of SEQ ID NO: 18.
  • these variants have improved performance as compared to wild-type B. amyloliquefaciens neutral metalloprotease.
  • the present invention also provides neutral metalloprotease variants having at least one improved property as compared to the wild-type neutral metalloprotease.
  • these variants have improved stability as compared to wild-type B. amyloliquefaciens neutral metalloprotease.
  • these variants have improved thermostability as compared to wild-type B. amyloliquefaciens neutral metalloprotease.
  • these variants have improved performance under lower or higher pH conditions, as compared to wild-type B. amyloliquefaciens neutral metalloprotease.
  • the present invention also provides neutral metalloproteases comprising at least a portion of the amino acid sequence set forth in SEQ ID NOS:3, 4 or 18.
  • the nucleotide sequences encoding these neutral metalloproteases comprise a nucleotide sequence selected from SEQ ID NOS: 1, 2, 12, and/or 13.
  • the neutral metalloproteases are variants having amino acid sequences that are similar to that set forth in SEQ ID NOS:3, 4 or 18.
  • the neutral metalloproteases are variants and/or homologs.
  • the neutral metalloproteases are those set forth in any of Figures 3 through 5.
  • the neutral metalloproteases are variants of those set forth in Figure 3, 4 and/or 5.
  • the present invention also provides expression vectors comprising a polynucleotide sequence encoding at least a portion of the neutral metalloprotease set forth in SEQ ID NOS:3, 4 or 18.
  • the present invention further provides expression vectors comprising a polynucleotide sequences that encode at least one neutral metalloprotease variant having amino acid sequence(s) comprising at least one substitution of an amino acid made at a position equivalent to a position in a Bacillus neutral metalloprotease comprising the amino acid sequence set forth in SEQ ID NOS:3, 4 or 18.
  • the present invention provides host cells comprising these expression vectors.
  • the host cells are selected from the group consisting of Bacillus sp.
  • the present invention also provides the neutral metalloproteases produced by the host cells.
  • the present invention also provides compositions comprising at least a portion of an isolated neutral metalloprotease of obtained from a Bacillus sp., particularly, B. amyloliquefaciens, wherein at least a portion of the neutral metalloprotease is encoded by a polynucleotide sequence selected from SEQ ID NOS:1, 2, 12 and/or 13.
  • the present invention provides host cells comprising these expression vectors.
  • the host cells are Bacillus sp.
  • the present invention also provides the neutral metalloproteases produced by the host cells.
  • the present invention also provides variant neutral metalloproteases, wherein the neutral metalloproteases comprise at least one substitution corresponding to the amino acid positions in SEQ ID NO:3 and/or SEQ ID NO: 18, and wherein variant metalloproteases have better performance in at least one property, as compared to wild-type B. amyloliquefaciens metalloprotease.
  • the present invention also provides variant neutral metalloproteases, wherein the neutral metalloproteases comprise at least one substitution corresponding to the amino acid positions in SEQ ID NO: 18, and wherein variant metalloproteases have better performance in at least one property, as compared to wild-type B. amyloliquefaciens metalloprotease.
  • the present invention also provides variant amino acids, wherein the variants comprise at least one substitution of an amino acid made at a position equivalent to a position in a neutral metalloprotease comprising the amino acid set forth in SEQ ID NO: 18, wherein the position(s) is or are selected from positions 1, 3, 4, 5, 6, 11, 12, 13, 14, 16, 21, 23, 24, 25, 31, 32, 33, 35, 36, 38, 44, 45, 46, 47, 48, 49, 50, 51, 54, 55, 58, 59, 60, 61, 62, 63, 65, 66, 69, 70, 76, 85, 86, 87, 88, 90, 91, 92, 96, 97, 98, 99, 100, 102, 109, 110, 111, 112, 113, 115, 117, 119, 127, 128, 129, 130, 132, 135, 136, 137, 138, 139, 140, 146, 148, 151, 152, 153, 154,
  • the present invention also provides isolated neutral metalloprotease variants having an amino acid sequence comprising at least one substitution of an amino acid made at a position equivalent to a position in a neutral metalloprotease comprising the amino acid sequence set forth in SEQ ID NO: 18.
  • the isolated neutral metalloprotease variants have substitutions that are made at positions equivalent to positions 1, 3, 4, 5, 6, 11, 12, 13, 14, 16, 21, 23, 24, 25, 31, 32, 33, 35, 36, 38, 44, 45, 46, 47, 48, 49, 50, 51, 54, 55, 58, 59, 60, 61, 62, 63, 65, 66, 69, 70, 76, 85, 86, 87, 88, 90, 91, 92, 96, 97, 98, 99, 100, 102, 109, 110, 111, 112, 113, 115, 117, 119, 127, 128, 129, 130, 132, 135, 136, 137, 138, 139, 140, 146, 148, 151
  • the isolated neutral metalloprotease variant comprises at least one mutation selected from T004C, T004E, T004H, T004I, T004K, T004L, T004M, T004N, T004P, T004R, T004S, T004V, T004W, T004Y, G012D, G012E, G012I, G012K, G012L, G012M, G012Q, G012R, G012T, G012V, G012W, K013A, K013C, K013D, K013E, K013F, K013G, K013H, K013I, K013L, K013M, K013N, K013Q, K013S, K013T, K013V, K013Y/T014F, T014G, T014H, T014I, T014K,T014L,
  • the present invention provides isolated variant neutral metalloproteases, wherein the metalloproteases comprise multiple mutations selected from S023W/G024M, T004V/S023W/G024W, S023W/G024Y/A288V, T004L/S023W/G024Y, N046Q/N050F/T054L, N050Y/T059R/S129Q, S023W/G024W, A273H/S285P/E292G, S023Y/G024Y, S023Y/G024W, T004S/S023Y/G024W, N046Q/T054K, S023W/G024Y, T004V/S023W, T059K/S066N, N046Q/N050W/T054H/T153A, T004V/S023W/G024Y, L282M/
  • L282M/Q286K/A289R/S132T N050W/T054H, L282M/Q286R, L282F/Q286K/A289R, T059R/S066Q, R047K/N050W/T054H, S265P/L282M/Q286K/A289R,
  • L282M/Q286R/T229S L282F/Q286K, T263W/S285R, S265P/L282M/Q286K, T263H/A273H/S285R, T059R/S129V, S032T/T263H/A273H/S285R, T059R/S066Q/S129Q, T004S/G024W, T004V/S023W/G024M, T059K/S066Q/S129Q, L282M/Q286K/A289R/I253V, T004V/S023Y/G024W, T059R/S066N/S129Q, N050F/T054L, T004S/S023N/G024W, T059R/S066N, T059R/S066N/S129V, Q286R/A289R,
  • T004V/S023Y/G024M S265P/L282F/A289R/T065S, T059K/F063L/S066N/S129V, T004L/S023W, N050F/T054H, T059R/S066Q/S129V, V190I/D220E/S265W/L282F, T004S/S023Y/G024M, T004L/S023N/G024Y, T059K/S066N/S129I, T059R/S066N/S129I, L282M/Q286R/A289R/P162S, N046Q/N050F/T179N, T059K/Y082C/S129V, T059K/S129I, N050Y/T054K, T059K/S066Q/V102A/S129Q, T059R/
  • T059W/S066N/S129V/S290R T059R/S129I, T059K/S066Q/S129I, T059K/S066Q/S129V, S265P/L282M/Q286R/A289R/T202S/K203N, T004V/S023N/G024W, S265P/Q286K, S265P/L282F/A289R, D220P/S265W, L055F/T059W/S129V, T059R7S129Q/S191R, N050W/T054K, T004S/S023W/G024M, R047K/N050F/T054H, T059K/S066N/K088E, T059K/S066Q/S129W291L, L282M/Q286R/A289R, T059R/S0
  • T263W/A273H/S285W T263W/A273H/S285P
  • S023Y/G024M T004L/S023N/G024W, T004V/S023N/G024Y, T059W/S066N/S129Q, T004S/S023Y, T004S/S023N/G024M, T059W/S066N/A070T, T059W/S066Q/S129Q, T263W/A273H, A273H/285P, N046Q/R047K/N050Y/T054L, N046Q/R047K/N050Y, R047K/N050Y, T263H/S285W, R047K/N050F, N046Q/R047K/N050F/T054H, S023N/G024M, T004S
  • E152F/T179P V190I/S265W, M138L/S066Q, M138L/E152W,
  • the present invention provides isolated variant neutral metalloproteases, wherein the metalloproteases comprise multiple mutations selected from V190I/D220P, V190I/D220P/S265Q, V190L/D220E, V190I/D220E/S265Q, V190I/D220E/S265W/L282F, V190L/D220E/S265Q, V190I/D220E/S265W, V190L/D220E/S265N, T059R/S066Q/S129I, V190I/D220E/S265N, V190L/D220E/S265W, V190I/D220E, T059W/S066N/S129V, T059K/S066Q/S129V, T059K/Y082C/S129V, T059R/S066N/S129I, S066Q/S129V
  • the present invention provides isolated neutral metalloproteases comprising multiple mutations selected from S066Q/S129V, S066Q/S129I, N050Y/S066Q/S129V, S066N/S129I, T059K/S066Q/S129V, S066N/S129V, F130L/E152W/T179P, S265P/L282M/Q286R/A289R, F130L/E152V/T179P,
  • L282M/Q286K/A289R N046Q/N050W/T054H/A142T, T059W/S066Q/S129Q, S265P/L282F/A289R/T065S, N050F/T054H, S129Q/L282H, L282M/Q286K/A289R/S132T, L282M/Q286R/A289R/K11N, T059K/S066N, R047K/N050W/T054K, T059K/S066Q, T004V/S023Y, T059W/S066N/S129V/S290R, N050Y/T059K/S066Q, and R047K/N050Y.
  • the present invention also provides isolated polynucleotides comprising a nucleotide sequence (i) having at least 70% identity to SEQ ID NOS: 1, 2, 12 and/or 13, or (ii) being capable of hybridizing to a probe derived from any of the nucleotide sequence set forth herein, including the primer sequences provided in the Examples, under conditions of intermediate to high stringency, or (iii) being complementary to the nucleotide sequence set forth in SEQ ID NOS: 1, 2, 12, and/or 13.
  • the present invention provides expression vectors encoding at least one such polynucleotide.
  • the present invention provides host cells comprising these expression vectors.
  • the host cells are Bacillus sp.
  • the present invention also provides the neutral metalloproteases produced by the host cells.
  • the present invention provides polynucleotides that are complementary to at least a portion of the sequence set forth in SEQ ID NOS: 1, 2, 12, and/or 13.
  • the present invention also provides methods of producing an enzyme having neutral metalloprotease activity, comprising: transforming a host cell with an expression vector comprising a polynucleotide having at least 70% sequence identity to SEQ ID NO:1, 2, 12 and/or 13; cultivating the transformed host cell under conditions suitable for the host cell.
  • the host cell is a Bacillus species.
  • the present invention also provides probes comprising 4 to 150 nucleotide sequence substantially identical to a corresponding fragment of SEQ ID NOS: 1, 2, 12, and/or 13, wherein the probe is used to detect a nucleic acid sequence coding for an enzyme having metalloproteolytic activity.
  • the nucleic acid sequence is obtained from a Bacillus sp.
  • the present invention also provides cleaning compositions comprising at least one neutral metalloprotease obtained from a Bacillus sp.
  • at least one neutral metalloprotease is obtained from B. amyloliquefaciens.
  • at least one neutral metalloprotease comprises the amino acid sequence set forth in SEQ ID NOS:3, 4, and/or 18.
  • the present invention provides isolated neutral metalloproteases comprising at least 45% amino acid identity with neutral metalloprotease comprising SEQ ID NOS:3, 4 and/or 18.
  • the isolated neutral metalloproteases comprise at least 50% identity, preferably at least 55%, more preferably at least 60%, yet more preferably at least 65%, even more preferably at least 70%, more preferably at least 75%, still more preferably at least 80%, more preferably 85%, yet more preferably 90%, even more preferably at least 95%, and most preferably 99% identity with SEQ ID NOS:3, 4, and/or 18.
  • the present invention further provides cleaning compositions comprising at least one neutral metalloprotease, wherein at least one of the neutral metalloproteases has immunological cross-reactivity with the neutral metalloprotease obtained from a Bacillus sp.
  • the neutral metalloproteases have immunological cross- reactivity with neutral metalloprotease obtained from B. amyloliquefaciens.
  • the neutral metalloproteases have immunological cross-reactivity with neutral metalloprotease comprising the amino acid sequence set forth in SEQ ID NOS:3, 4 and/or 18.
  • the neutral metalloproteases have cross-reactivity with fragments ⁇ i.e., portions) of a Bacillus sp. neutral metalloprotease and/or the neutral metalloprotease comprising the amino acid sequence set forth in SEQ ID NOS :3, 4, and/or 18.
  • the present invention further provides cleaning compositions comprising at least one neutral metalloprotease, wherein the neutral metalloprotease is a variant neutral metalloprotease having an amino acid sequence comprising at least one substitution of an amino acid made at a position equivalent to a position in a Bacillus sp. neutral metalloprotease having an amino acid sequence set forth in SEQ ID NOS:3, 4 and/or 18, particularly B. amyloliquefaciens neutral metalloprotease.
  • the present invention also provides cleaning compositions comprising at least one neutral metalloprotease, wherein the neutral metalloprotease is a variant neutral metalloprotease having an amino acid sequence comprising at least one substitution of an amino acid made at a position equivalent to a position in a Bacillus sp. neutral metalloprotease having an amino acid sequence set forth in SEQ ID NO: 18, particularly B. amyloliquefaciens neutral metalloprotease.
  • the cleaning compositions contain at least one neutral metalloprotease comprising a set of mutations in SEQ ID NOS:3, 4 and/or 18.
  • the variant neutral metalloproteases comprise at least one substitution corresponding to the amino acid positions in SEQ ID NOS:3, 4, and/or 18, and wherein the variant neutral metalloproteases have better performance in at least one property, as compared to wild-type B. amyloliquefaciens neutral metalloprotease.
  • the present invention also provides cleaning compositions comprising a cleaning effective amount of at least one metalloproteolytic enzyme, the enzyme comprising an amino acid sequence having at least 70 % sequence identity to SEQ ID NOS:3, 4, and/or 18, and a suitable cleaning formulation.
  • the cleaning compositions further comprise one or more additional enzymes or enzyme derivatives selected from the group consisting of proteases, amylases, lipases, mannanases, pectinases, cutinases, oxidoreductases, hemicellulases, and cellulases.
  • the present invention also provides compositions comprising at least one neutral metalloprotease obtained from a Bacillus sp., in particular B. amyloliquefaciens, wherein the compositions further comprise at least one stabilizer.
  • the stabilizer is selected from borax, glycerol, zinc ions, calcium ions, and calcium formate.
  • the present invention provides competitive inhibitors suitable to stabilize the enzyme of the present invention to anionic surfactants.
  • at least one neutral metalloprotease is obtained from a Bacillus sp.
  • the at least one neutral metalloprotease is obtained from B. amyloliquefaciens.
  • the at least one neutral metalloprotease comprises the amino acid sequence set forth in SEQ ID NOS:3, 4, and/or 18.
  • the present invention further provides compositions comprising at least one neutral metalloprotease obtained from a Bacillus sp., wherein the neutral metalloprotease is an autolytically stable variant.
  • at least one variant neutral metalloprotease is obtained from B. amyloliquefaciens.
  • the at least one variant neutral metalloprotease comprises the amino acid sequence set forth in SEQ ID NOS:3, 4, and/or 18.
  • the present invention also provides cleaning compositions comprising at least 0.0001 weight percent of the neutral metalloprotease of the present invention, and optionally, an adjunct ingredient.
  • the composition comprises an adjunct ingredient.
  • the composition comprises a sufficient amount of a pH modifier to provide the composition with a neat pH of from about 3 to about 5, the composition being essentially free of materials that hydrolyze at a pH of from about 3 to about 5.
  • the materials that hydrolyze comprise a surfactant material.
  • the cleaning composition is a liquid composition, while in other embodiments, the cleaning composition is a solid composition and in still further embodiments, the cleaning composition is a gel. Indeed, it is not intended that the present invention be limited to any particular formulation and/or composition, as various formulations and/or compositions find use in the present invention.
  • the surfactant material comprises a sodium alkyl sulfate surfactant that comprises an ethylene oxide moiety.
  • the present invention additionally provides cleaning compositions that in addition to at least one neutral metalloprotease of the present invention, further comprise at least one acid stable enzyme, the cleaning composition comprising a sufficient amount of a pH modifier to provide the composition with a neat pH of from about 3 to about 5, the composition being essentially free of materials that hydrolyze at a pH of from about 3 to about 5.
  • the materials that hydrolyze comprise a surfactant material.
  • the cleaning composition being a liquid composition.
  • the surfactant material comprises a sodium alkyl sulfate surfactant that comprises an ethylene oxide moiety.
  • the cleaning composition comprises a suitable adjunct ingredient.
  • the composition comprises a suitable adjunct ingredient.
  • the composition comprises from about 0.001 to about 0.5 weight % of neutral metalloprotease,
  • the composition comprises from about 0.01 to about 0.1 weight percent of neutral metalloprotease.
  • the present invention also provides methods of cleaning, the comprising the steps of: a) contacting a surface and/or an article comprising a fabric with the cleaning composition comprising the neutral metalloprotease of the present invention at an appropriate concentration; and b) optionally washing and/or rinsing the surface or material.
  • any suitable composition provided herein finds use in these methods.
  • the fabric comprises at least one grass stain.
  • the cleaning compositions of the present invention find use in removing grass and other stains from fabrics.
  • the present invention also provides animal feed comprising at least one neutral metalloprotease obtained from a Bacillus sp. In some embodiments, at least one neutral metalloprotease is obtained from B. amyloliquefaciens.
  • At least one neutral metalloprotease comprises the amino acid sequence set forth in SEQ ID NOS:3, 4 or 18. In some alternative particularly preferred embodiments, at least one neutral metalloprotease comprises the amino acid sequence set forth in SEQ 3D NO: 18.
  • the present invention provides an isolated polypeptide having metalloproteolytic activity, (e.g., a neutral metalloprotease) having the amino acid sequence set forth in SEQ ID NO: 18.
  • the present invention provides isolated polypeptides having approximately 40% to 98% identity with the sequence set forth in SEQ ID NO:18.
  • the polypeptides have approximately 50% to 95% identity with the sequence set forth in SEQ ID NO: 18.
  • the polypeptides have approximately 60% to 90% identity with the sequence set forth in SEQ ID NO: 18.
  • the polypeptides have approximately 65% to 85% identity with the sequence set forth in SEQ ID NOS:3, 4, or 18.
  • the polypeptides have approximately 90% to 95% identity with the sequence set forth in SEQ ID NOS:3, 4, or 18.
  • the present invention further provides isolated polynucleotides that encode neutral metalloproteases comprise an amino acid sequence comprising at least 40% amino acid sequence identity to SEQ ID NOS:3, 4, or 18.
  • the neutral metalloproteases have at least 50% amino acid sequence identity to SEQ ID NOS:3, 4 and/or 18.
  • the neutral metalloproteases have at least 60 ⁇ o amino acid sequence identity to SEQ ID NOS:3, 4 or 18.
  • the neutral metalloproteases have at least 70% amino acid sequence identity to SEQ ID NOS:3, 4 or 18.
  • the neutral metalloproteases have at least 80% amino acid sequence identity to SEQ ID NOS:3, 4 or 18.
  • the neutral metalloproteases have at least 90% amino acid sequence identity to SEQ ID NOS:3, 4 or 18. In some embodiments, the neutral metalloproteases have at least 95% amino acid sequence identity to SEQ ID NO:3, 4 or 18.
  • the present invention also provides expression vectors comprising any of the polynucleotides provided above.
  • the present invention further provides host cells transformed with the expression vectors of the present invention, such that at least one neutral metalloprotease is expressed by the host cells.
  • the host cells are bacteria, while in other embodiments, the host cells are fungi.
  • the present invention also provides isolated polynucleotides comprising a nucleotide sequence (i) having at least 70% identity to SEQ ID NO:1, 2, 12 and/or 13, or (ii) being capable of hybridizing to a probe derived from the nucleotide sequence of SEQ ID NO: 1 , 2,
  • the present invention provides vectors comprising such polynucleotide.
  • the present invention provides host cells transformed with such vectors.
  • the present invention further provides methods for producing at least one enzyme having neutral metalloprotease activity, comprising: the steps of transforming a host cell with an expression vector comprising a polynucleotide comprising at least 70% sequence identity to SEQ ID NO:1, 2, 12, and/or 13, cultivating the transformed host cell under conditions suitable for the host cell to produce the neutral metalloprotease; and recovering the neutral metalloprotease.
  • the host cell is a Bacillus sp, while in some alternative embodiments, the host cell is B. ⁇ nyloliquefaciens.
  • the present invention also provides fragments ⁇ i.e., portions) of the DNA encoding the neutral metalloproteases provided herein. These fragments find use in obtaining partial length DNA fragments capable of being used to isolate or identify polynucleotides encoding mature neutral metalloprotease enzyme described herein from B. amyloliquefaciens , or a segment thereof having proteolytic activity. In some embodiments, portions of the DNA provided in SEQ ID NO:2 find use in obtaining homologous fragments of DNA from other species which encode a neutral metalloprotease or portion thereof having metalloproteolytic activity.
  • the present invention further provides at least one probe comprising a polynucleotide substantially identical to a fragment of SEQ ID NOS:1, 2, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, and/or any primer sequence set forth herein, wherein the probe is used to detect a nucleic acid sequence coding for an enzyme having metalloproteolytic activity, and wherein the nucleic acid sequence is obtained from a bacterial source.
  • the bacteria] source is a Bacillus sp.
  • the bacterial source is B. amyloliquefaciens.
  • the present invention further provides compositions comprising at least one of the neutral metalloproteases provided herein. In some preferred embodiments, the compositions are cleaning compositions.
  • the present invention provides cleaning compositions comprising a cleaning effective amount of at least one neutral metal! oprotease comprising an amino acid sequence having at least 40% sequence identity to SEQ ID NO: 18 at least 90% sequence identity to SEQ ID NO:18, and/or having an amino acid sequence of SEQ ID NO: 18.
  • the cleaning compositions further comprise at least one suitable cleaning adjunct.
  • the neutral metalloprotease is derived from a Bacillus sp.
  • the Bacillus sp. is B. amyloliquefaciens.
  • the cleaning composition further comprises at least one additional enzymes or enzyme derivatives selected from the group consisting of proteases, amylases, lipases, mannanases, and cellulases.
  • the present invention also provides isolated naturally occurring neutral metalloproteases comprising an amino acid sequence having at least 45% sequence identity to SEQ ID NO: 18, at least 60% sequence identity to SEQ ID NO: 18, at least 75% sequence identity to SEQ ID NO:18, at least 90% sequence identity to SEQ ID NO:18, at least 95% sequence identity to SEQ ID NO:18, and/or having the sequence SEQ ID NO:18, the neutral metalloprotease being isolated from a Bacillus sp.
  • the neutral metalloprotease is isolated from B. amyloliquefaciens.
  • the present invention provides engineered variants of the neutral metalloproteases of the present invention.
  • the engineered variants are genetically modified using recombinant DNA technologies, while in other embodiments, the variants are naturally occurring.
  • the present invention further encompasses engineered variants of homologous enzymes, as well as isolated enzyme homologs.
  • the engineered variant homologous neutral metalloproteases are genetically modified using recombinant DNA technologies, while in other embodiments, the variant homologous neutral metalloproteases are naturally occurring.
  • the present invention also provides methods for producing neutral metalloproteases, comprising: (a) transforming a host cell with an expression vector comprising a polynucleotide having at least 70% sequence identity to SEQ ID NO:2, at least 95% sequence identity to SEQ ID NO:2, and/or having a polynucleotide sequence of SEQ ID NO:2; (b) cultivating the transformed host cell under conditions suitable for the host cell to produce the neutral metalloprotease; and (c) recovering the neutral metalloprotease.
  • the host cell is a Bacillus species (e.g., B. subtilis, B. clausii, or B. lichenifonnis).
  • the host cell is a B. amyloliquefaciens
  • the present invention provides means to produce host cells that are capable of producing the neutral metalloproteases of the present invention in relatively large quantities.
  • the present invention provides means to produce neutral metalloprotease with various commercial applications where degradation or synthesis of polypeptides are desired, including cleaning compositions, as well as food and/or feed components, textile processing, leather finishing, grain processing, meat processing, cleaning, preparation of protein hydrolysates, digestive aids, microbicidal compositions, bacteriostatic compositions, fungistatic compositions, personal care products ⁇ e.g., oral care, hair care, and/or skin care).
  • the present invention also provides variant neutral metalloproteases having improved performance as compared to wild-type B. amyloliquefaciens neutral metalloprotease.
  • the improved performance comprises improved thermostability, as compared to wild-type B. amyloliquefaciens neutral metalloprotease.
  • the improved performance comprises improved performance under lower or higher pH conditions, as compared to wild-type B. amyloliquefaciens neutral metalloprotease.
  • the improved performance comprises improved autolytic stability, as compared to wild-type B. amyloliquefaciens neutral metalloprotease.
  • the enzyme compositions of the present invention have comparable or improved wash performance, as compared to presently used neutral metalloproteases. Other objects and advantages of the present invention are apparent herein. DESCRIPTION OF THE FIGURES
  • Figure 1 provides a graph showing the results from the determination of the affinity constants of purified MULTTFECT® neutral binding protein for zinc and calcium cations using the fluorescent dyes Fluo-Zn3 and Fluo-3, respectively.
  • Figure 2 provides a graph showing inhibition of protease activity of 0.36 mg/ml formulated recombinant B. amyloliquefaciens nprE by Linear Alkylbenzene Sulfonate (LAS) assayed using the QuantiCleaveTM protease assay.
  • LAS Linear Alkylbenzene Sulfonate
  • Figure 3 provides a sequence alignment of various metalloprotease homologues (SEQ TD NOS:173-181) that find use in the present invention.
  • Figure 4 provides a sequence alignment of various metalloprotease homologues
  • Figure 5 provides a sequence alignment of various metalloprotease homologues (SEQ ID NOS: 192-195) identified through homology modeling.
  • Figure 6 provides a map of plasmid pJ4:GO1905.
  • Figure 7 provides a map of plasmid pJ4: GOl 906.
  • Figure 8 provides a map of plasmid pJ4:G01907.
  • Figure 9 provides a map of plasmid pJ4:G01908.
  • Figure 10 provides a map of plasmid pJ4:G01909.
  • Figure 11 provides a map of plasmid pJ4:G01938.
  • Figure 12 provides a map of plasmid pJHT.
  • Figure 13 provides a map of plasmid pAC.
  • Figure 14 provides a map of pUBnprE.
  • Figure 15 provides a schematic showing the amplification of the aprE promoter and
  • Figure 16 provides a map of plasmid pEL501.
  • Figure 17 provides a schematic showing the amplification of the aprE promoter and B. subtilis nprB gene fragments.
  • Figure 18 provides a map of plasmid pEL5O8.
  • Figure 19 provides a schematic showing the amplification of the aprE promoter and B. stearothennophilus nprT gene fragments, used in the production of strain EL560.
  • Figure 20 provides a diagram showing the construction of strain EL560.
  • Figure 21 provides a schematic showing the amplification of the aprE promoter and B. caldolyticus npr gene fragments, used in the production of strain EL561.
  • Figure 22 provides a diagram showing the construction of strain EL561.
  • Figure 23 provides a schematic showing the amplification of the aprE promoter and
  • Figure 24 provides a map of plasmid pEL568.
  • Figure 25 provides a graph showing results from experiments designed to determine the long-term storage of 0.36 mg/ml UF concentrate of neutral metalloprotease (nprE) in TIDE® 2005 base in the presence of zinc and calcium ions at 32 0 C. For comparative purposes, results obtained for testing without salt and excess calcium are provided.
  • nprE neutral metalloprotease
  • Figure 26 provides wash performance test data using Terg-O-Tometer (TOM) and varying soiled substrates.
  • Panel A provides results showing the delta soil removal (%) of subtilisin (BPN' Y217L) and purified MULTIFECT® Neutral on EMPA 116 (fixed and unfixed on cotton) after washing at 15°C in TIDE®-2005 detergent liquid.
  • Panel B provides results showing the delta soil removal (%) of subtilisin (BPN' Y217L) and purified MULTIFECT® Neutral on Equest® grass medium soiled on cotton after washing at 15 0 C in TIDE®-2005 detergent liquid.
  • Panel C provides results showing the delta soil removal (%) of subtilisin (BPN' Y217L) and purified MULTIFECT® Neutral on CFT C-10 (pigment, oil, milk on cotton) after washing at 15°C in TIDE®-2005 detergent liquid.
  • Figure 27 provides a graph showing the results of DSC scans for 440 ppm NprE and variants obtained using the VP-Cap DSC (MicroCalTM).
  • Figure 28 provides a graph showing the results for DSC scans for 440 ppm NprE and variants in the presence of 130 n ⁇ vl citrate were obtained using the VP-Cap DSC (MicroCalTM).
  • Figure 29 provides a graph showing the thermal melting points for 440 ppm NprE in the presence of various additives and obtained using the VP-Cap DSC (MicroCalTM).
  • the horizontal line represents the Tm for wild-type NprE with no additives.
  • Figure 30 provides a graph showing the remaining activity of nprE and nprE homologs in 25% TIDE® at 25°C, after 90 minutes.
  • Figure 31 provides a graph showing the BMI wash performance of nprE and nprE homologs.
  • Figure 32 provides a graph showing the results of NprE stability measurements in various formulation mixes.
  • Figure 33 provides graphs (Panels A, B and C showing the rate of NprE inactivation with different % DTPA concentrations at a fixed calcium formate concentration.
  • Figure 34 provides graphs (Panels A, B and C) showing the DOE analysis software generated prediction profiles of a DTPA and calcium formate composition based on response goal (decay rate).
  • Figure 35 provides the amino acid sequences (SEQ ID NOS:222-226) for the citrate- induced autolytic fragments of NprE highlighting the autolysis sites.
  • Fragment 1 and 2 are the first clip
  • Fragment 3-5 represent the second clip.
  • the italicized letters represent the sequenced N-termini and bold letters highlight the peptides that were identified from the in- gel digestion of the respective fragments.
  • the present invention provides methods and compositions comprising at least one neutral metalloprotease enzyme that has improved storage stability.
  • the neutral metalloprotease finds use in cleaning and other applications.
  • the present invention provides methods and compositions comprising neutral metalloprotease(s) obtained from Bacillus sp.
  • the neutral metalloprotease is obtained from B. amyloliquefaciens.
  • the neutral metalloprotease is a variant of the B. amyloliquefaciens neutral metalloprotease.
  • the neutral metalloprotease is a homolog of the the B. amyloliquefaciens neutral metalloprotease.
  • the present invention finds particular use in applications including, but not limited to cleaning, bleaching and disinfecting.
  • nucleic acids are written left to right in 5' to 3' orientation; amino acid sequences are written left to right in amino to carboxy orientation, respectively. It is to be understood that this invention is not limited to the particular methodology, protocols, and reagents described, as these may vary, depending upon the context they are used by those of skill in the art.
  • bleaching refers to the treatment of a material (e.g., fabric, laundry, pulp, etc.) or surface for a sufficient length of time and under appropriate pH and temperature conditions to effect a brightening (i.e., whitening) and/or cleaning of the material.
  • a material e.g., fabric, laundry, pulp, etc.
  • chemicals suitable for bleaching include but are not limited to CIO 2 , H 2 O 2 , peracids, NO 2 , etc.
  • the term “disinfecting” refers to the removal of contaminants from the surfaces, as well as the inhibition or killing of microbes on the surfaces of items. It is not intended that the present invention be limited to any particular surface, item, or contaminant(s) or microbes to be removed.
  • the term “multimer” refers to two or more proteins or peptides that are covalently or non-covalently associated and exist as a complex in solution. A “dimer” is a multimer that contains two proteins or peptides; a “trimer” contains three proteins or peptides, etc.
  • “octamer” refers to a multimer of eight proteins or peptides.
  • personal care products means products used in the cleaning, bleaching and/or disinfecting of hair, skin, scalp, and teeth, including, but not limited to shampoos, body lotions, shower gels, topical moisturizers, toothpaste, and/or other topical cleansers. In some particularly preferred embodiments, these products are utilized on humans, while in other embodiments, these products find use with non-human animals (e.g., in veterinary applications).
  • cleaning compositions and “cleaning formulations,” unless otherwise indicated, refer to compositions that find use in the removal of undesired compounds from items to be cleaned, such as fabric, dishes, contact lenses, other solid substrates, hair (shampoos), skin (soaps and creams), teeth (mouthwashes, toothpastes) etc.
  • the term encompasses any materials/compounds selected for the particular type of cleaning .
  • composition desired and the form of the product e.g., liquid, gel, granule, or spray composition
  • the specific selection of cleaning composition materials are readily made by considering the surface, item or fabric to be cleaned, and the desired form of the composition for the cleaning conditions during use.
  • the terms further refer to any composition that is suited for cleaning, bleaching, disinfecting, and/or sterilizing any object and/or surface. It is intended that the terms include, but are not limited to detergent compositions (e.g., liquid and/or solid laundry detergents and fine fabric detergents; hard surface cleaning formulations, such as for glass, wood, ceramic and metal counter tops and windows; carpet cleaners; oven cleaners; fabric fresheners; fabric softeners; and textile and laundry pre-spotters, as well as dish detergents).
  • detergent compositions e.g., liquid and/or solid laundry detergents and fine fabric detergents; hard surface cleaning formulations, such as for glass, wood, ceramic and metal counter tops and windows; carpet cleaners; oven cleaners; fabric fresheners; fabric softeners; and textile and laundry pre-spotters, as well as dish detergents).
  • cleaning composition includes unless otherwise indicated, granular or powder-form all-purpose or heavy-duty washing agents, especially cleaning detergents; liquid, gel or paste-form all-purpose washing agents, especially the so- called heavy-duty liquid (HDL) types; liquid fine-fabric detergents; hand dishwashing agents or light duty dishwashing agents, especially those of the high-foaming type; machine dishwashing agents, including the various tablet, granular, liquid and rinse-aid types for household and institutional use; liquid cleaning and disinfecting agents, including antibacterial hand-wash types, cleaning bars, mouthwashes, denture cleaners, car or carpet shampoos, bathroom cleaners; hair shampoos and hair-rinses; shower gels and foam baths and metal cleaners; as well as cleaning auxiliaries such as bleach additives and "stain-stick" or pre-treat types.
  • HDL heavy-duty liquid
  • cleaning and disinfecting agents including antibacterial hand-wash types, cleaning bars, mouthwashes, denture cleaners, car or carpet shampoos, bathroom cleaners; hair shampoos and
  • detergent composition and “detergent formulation” are used in reference to mixtures which are intended for use in a wash medium for the cleaning of soiled objects.
  • the term is used in reference to laundering fabrics and/or garments (e.g., “laundry detergents”).
  • laundry detergents e.g., "laundry detergents”
  • the term refers to other detergents, such as those used to clean dishes, cutlery, etc. (e.g., "dishwashing detergents”). It is not intended that the present invention be limited to any particular detergent formulation or composition.
  • the term encompasses detergents that contain surfactants, transferase(s), hydrolytic enzymes, oxido reductases, builders, bleaching agents, bleach activators, bluing agents and fluorescent dyes, caking inhibitors, masking agents, enzyme activators, antioxidants, and solubilizers.
  • Applicant Enzyme refers to the neutral metalloproteases of the present invention.
  • "enhanced performance" in a detergent is defined as increasing cleaning of bleach-sensitive stains (e.g., grass, tea, wine, blood, dingy, etc.), as determined by usual evaluation after a standard wash cycle.
  • the neutral metalloprotease of the present invention provides enhanced performance in the removal of colored stains and soils.
  • the enzyme of the present invention provides enhanced performance in the removal and/or decolorization of stains.
  • hard surface cleaning composition refers to detergent compositions for cleaning hard surfaces such as floors, walls, tile, bath and kitchen fixtures, and the like. Such compositions are provided in any form, including but not limited to solids, liquids, emulsions, etc.
  • washing composition refers to all forms for compositions for cleaning dishes, including but not limited to granular and liquid forms.
  • fabric cleaning composition refers to all forms of detergent compositions for cleaning fabrics, including but not limited to, granular, liquid and bar forms.
  • textile refers to woven fabrics, as well as staple fibers and filaments suitable for conversion to or use as yarns, woven, knit, and non-woven fabrics.
  • the term encompasses yarns made from natural, as well as synthetic (e.g., manufactured) fibers.
  • textile materials is a general term for fibers, yarn intermediates, yarn, fabrics, and products made from fabrics (e.g., garments and other articles).
  • fabric encompasses any textile material. Thus, it is intended that the term encompass garments, as well as fabrics, yarns, fibers, non-woven materials, natural materials, synthetic materials, and any other textile material.
  • the term "compatible,” means that the cleaning composition materials do not reduce the enzymatic activity of the neutral metalloprotease to such an extent that the neutral metalloprotease is not effective as desired during normal use situations.
  • Specific cleaning composition materials are exemplified in detail hereinafter.
  • effective amount of enzyme refers to the quantity of enzyme necessary to achieve the enzymatic activity required in the specific application (e.g., personal care product, cleaning composition, etc.). Such effective amounts are readily ascertained by one of ordinary skill in the art and are based on many factors, such as the particular enzyme variant used, the cleaning application, the specific composition of the cleaning composition, and whether a liquid or dry (e.g., granular, bar) composition is required, and the like.
  • non-fabric cleaning compositions encompass hard surface cleaning compositions, dishwashing compositions, personal care cleaning compositions (e.g., oral cleaning compositions, denture cleaning compositions, personal cleansing compositions, etc.), and compositions suitable for use in the pulp and paper industry.
  • oral cleaning compositions refers to dentifrices, toothpastes, toothgels, toothpowders, mouthwashes, mouth sprays, mouth gels, chewing gums, lozenges, sachets, tablets, biogels, prophylaxis pastes, dental treatment solutions, and the like.
  • transferase refers to an enzyme that catalyzes the transfer of functional compounds to a range of substrates.
  • leaving group refers to the nucleophile which is cleaved from the acyl donor upon substitution by another nucleophile.
  • the term "enzymatic conversion” refers to the modification of a substrate to an intermediate or the modification of an intermediate to an end-product by contacting the substrate or intermediate with an enzyme.
  • contact is made by directly exposing the substrate or intermediate to the appropriate enzyme.
  • contacting comprises exposing the substrate or intermediate to an organism that expresses and/or excretes the enzyme, and/or metabolizes the desired substrate and/or intermediate to the desired intermediate and/or end-product, respectively.
  • detergent stability refers to the stability of a detergent composition. In some embodiments, the stability is assessed during the use of the detergent, while in other embodiments, the term refers to the stability of a detergent composition during storage. As used herein, the phrase, “stability to proteolysis” refers to the ability of a protein
  • protease e.g., an enzyme
  • oxidative stability refers to the ability of a protein to function under oxidative conditions.
  • the term refers to the ability of a protein to function in the presence of various concentrations of H 2 O 2 and/or peracid. Stability under various oxidative conditions can be measured either by standard procedures known to those in the art and/or by the methods described herein.
  • a substantial change in oxidative stability is evidenced by at least about a 5% or greater increase or decrease (in most embodiments, it is preferably an increase) in the half-life of the enzymatic activity, as compared to the enzymatic activity present in the absence of oxidative compounds.
  • pH stability refers to the ability of a protein to function at a particular pH. In general, most enzymes have a finite pH range at which they will function. In addition to enzymes that function in mid-range pHs ⁇ i.e., around pH 7), there are enzymes that are capable of working under conditions with very high or very low pHs. Stability at various pHs can be measured either by standard procedures known to those in the art and/or by the methods described herein. A substantial change in pH stability is evidenced by at least about 5% or greater increase or decrease (in most embodiments, it is preferably an increase) in the half-life of the enzymatic activity, as compared to the enzymatic activity at the enzyme's optimum pH. However, it is not intended that the present invention be limited to any pH stability level nor pH range.
  • thermal stability refers to the ability of a protein to function at a particular temperature. In general, most enzymes have a finite range of temperatures at which they will function. In addition to enzymes that work in mid-range temperatures ⁇ e.g., room temperature), there are enzymes that are capable of working in very high or very low temperatures. Thermal stability can be measured either by known procedures or by the methods described herein. A substantial change in thermal stability is evidenced by at least about 5% or greater increase or decrease (in most embodiments, it is preferably an increase) in the half-life of the catalytic activity of a mutant when exposed to a different temperature ⁇ i.e., higher or lower) than optimum temperature for enzymatic activity.
  • the present invention be limited to any temperature stability level nor temperature range.
  • chemical stability refers to the stability of a protein ⁇ e.g., an enzyme) towards chemicals that adversely affect its activity.
  • chemicals include, but are not limited to hydrogen peroxide, peracids, anionic detergents, cationic detergents, non-ionic detergents, chelants, etc.
  • present invention be limited to any particular chemical stability level nor range of chemical stability.
  • neutral metalloprotease activity improvement refers to the relative improvement of neutral metalloprotease activity, in comparison with a standard enzyme. In some embodiments, the term refers to an improved rate of product formation, while in other embodiments, the term encompasses compositions that produce less hydrolysis product. In additional embodiments, the term refers to neutral metalloprotease compositions with altered substrate specificity. As used herein, the phrase “alteration in substrate specificity” refers to changes in the substrate specificity of an enzyme. In some embodiments, a change in substrate specificity is defined as a difference between the K cat /K m ratio observed with an enzyme compared to enzyme variants or other enzyme compositions. Enzyme substrate specificities vary, depending upon the substrate tested.
  • the substrate specificity of an enzyme is determined by comparing the catalytic efficiencies it exhibits with different substrates. These determinations find particular use in assessing the efficiency of mutant enzymes, as it is generally desired to produce variant enzymes that exhibit greater ratios for particular substrates of interest. However, it is not intended that the present invention be limited to any particular substrate composition nor any specific substrate specificity.
  • surface property is used in reference to an electrostatic charge, as well as properties such as the hydrophobicity and/or hydrophilicity exhibited by the surface of a protein.
  • the three R groups may be: AAA, BBB, CCC, AAB, AAC, BBA, BBC, CCA, CCB, or ABC.
  • substituted as used herein, means that the organic composition or radical to which the term is applied is:
  • At least one hydrogen in the compound or radical is replaced with a moiety containing one or more (i) carbon, (ii) oxygen, (iii) sulfur, (iv) nitrogen or (v) halogen atoms; or
  • Moieties which may replace hydrogen as described in (b) immediately above, that contain only carbon and hydrogen atoms are hydrocarbon moieties including, but not limited to, alkyl, alkenyl, alkynyl, alkyldienyl, cycloalkyl, phenyl, alkyl phenyl, naphthyl, anthryl, phenanthryl, fluoryl, steroid groups, and combinations of these groups with each other and with polyvalent hydrocarbon groups such as alkylene, alkylidene and alkylidyne groups.
  • Moieties containing oxygen atoms that may replace hydrogen as described in (b) immediately above include, but are not limited to, hydroxy, acyl or keto, ether, epoxy, carboxy, and ester containing groups.
  • Moieties containing sulfur atoms that may replace hydrogen as described in (b) immediately above include, but are not limited to, the sulfur-containing acids and acid ester groups, thioether groups, mercapto groups and thioketo groups.
  • Moieties containing nitrogen atoms that may replace hydrogen as described in (b) immediately above include, but are not limited to, amino groups, the nitro group, azo groups, ammonium groups, amide groups, azido groups, isocyanate groups, cyano groups and nitrile groups.
  • Moieties containing halogen atoms that may replace hydrogen as described in (b) immediately above include chloro, bromo, fluoro, iodo groups and any of the moieties previously described where a hydrogen or a pendant alkyl group is substituted by a halo group to form a stable substituted moiety.
  • any of the above moieties (b)(i) through (b)(v) can be substituted into each other in either a monovalent substitution or by loss of hydrogen in a polyvalent substitution to form another monovalent moiety that can replace hydrogen in the organic compound or radical.
  • the terms “purified” and “isolated” refer to the removal of contaminants from a sample.
  • neutral metalloprotease are purified by removal of contaminating proteins and other compounds within a solution or preparation that are not neutral metalloprotease.
  • recombinant neutral metalloprotease are expressed in bacterial or fungal host cells and these recombinant neutral metalloproteases are purified by the removal of other host cell constituents; the percent of recombinant neutral metalloprotease polypeptides is thereby increased in the sample.
  • the metalloprotease of the present invention is substantially purified to a level of at least about 99% of the protein component, as determined by SDS-PAGE or other standard methods known in the art.
  • the metalloprotease of the present invention comprise at least about 99% of the protease component of the compositions. In yet alternative embodiments, the metalloprotease is present in a range of about at least 90-95% of the total protein and/or protease.
  • protein of interest refers to a protein (e.g., an enzyme or "enzyme of interest”) which is being analyzed, identified and/or modified.
  • Naturally-occurring, as well as recombinant proteins find use in the present invention.
  • protein refers to any composition comprised of amino acids and recognized as a protein by those of skill in the art.
  • protein refers to any composition comprised of amino acids and recognized as a protein by those of skill in the art.
  • peptide and polypeptide are used interchangeably herein. Wherein a peptide is a portion of a protein, those skilled in the art understand the use of the term in context.
  • functionally and/or structurally similar proteins are considered to be
  • proteins are derived from a different genus and/or species, including differences between classes of organisms (e.g., a bacterial protein and a fungal protein). In some embodiments, these proteins are derived from a different genus and/or species, including differences between classes of organisms (e.g., a bacterial enzyme and a fungal enzyme). In additional embodiments, related proteins are provided from the same species. Indeed, it is not intended that the present invention be limited to related proteins from any particular source(s). In addition, the term "related proteins” encompasses tertiary structural homologs and primary sequence homologs (e.g., the neutral metalloprotease of the present invention).
  • the present invention encompasses such homologs as those provided in Figures 3-5. Additional homologs are contemplated, including but not limited to metalloprotease enzymes obtained from B. cereus, B. cereus E33L, B. caldolyticus, B.pumulis, B. megaterium, B subtilis amylosacchariticus, Brevibacillus brevis, Paenibacillus polymyxa (Bacillus polymyx ⁇ ), B. stearothermophilus, B. thuringiensis, B. subtilis and 5. aureus, as well as aureolysin, extracellular elastase, and neutral protease B.
  • the term encompasses proteins that are immunologically cross-reactive.
  • the term "derivative" refers to a protein which is derived from a protein by addition of one or more amino acids to either or both the C- and N-terminal end(s), substitution of one or more amino acids at one or a number of different sites in the amino acid sequence, and/or deletion of one or more amino acids at either or both ends of the protein or at one or more sites in the amino acid sequence, and/or insertion of one or more amino acids at one or more sites in the amino acid sequence.
  • the preparation of a protein derivative is preferably achieved by modifying a DNA sequence which encodes for the native protein, transformation of that DNA sequence into a suitable host, and expression of the modified DNA sequence to form the derivative protein.
  • variant proteins differ from a parent protein and one another by a small number of amino acid residues.
  • the number of differing amino acid residues may be one or more, preferably 1, 2, 3, 4, 5, 10, 15, 20, 30, 40, 50, or more amino acid residues.
  • the number of different amino acids between variants is between 1 and 10.
  • related proteins and particularly variant proteins comprise at least 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%,
  • a related protein or a variant protein as used herein refers to a protein that differs from another related protein or a parent protein in the number of prominent regions.
  • variant proteins have 1, 2, 3, 4, 5, or 10 corresponding prominent regions that differ from the parent protein.
  • variants of the enzymes of the present invention including but not limited to site-saturation mutagenesis, scanning mutagenesis, insertional mutagenesis, random mutagenesis, site-directed mutagenesis, and directed-evolution, as well as various other recombinatorial approaches. Characterization of wild-type and mutant proteins is accomplished via any means suitable and is preferably based on the assessment of properties of interest. For example, pH and/or temperature, as well as detergent and /or oxidative stability is/are determined in some embodiments of the present invention. Indeed, it is contemplated that enzymes having various degrees of stability in one or more of these characteristics (pH, temperature, proteolytic stability, detergent stability, and/or oxidative stability) will find use.
  • expression vector refers to a DNA construct containing a DNA sequence that is operably linked to a suitable control sequence capable of effecting the expression of the DNA in a suitable host.
  • control sequences include a promoter to effect transcription, an optional operator sequence to control such transcription, a sequence encoding suitable mRNA ribosome binding sites and sequences which control termination of transcription and translation.
  • the vector may be a plasmid, a phage particle, or simply a potential genomic insert. Once transformed into a suitable host, the vector may replicate and function independently of the host genome, or may, in some instances, integrate into the genome itself.
  • plasmid In the present specification, "plasmid,” “expression plasmid,” and “vector” are often used interchangeably as the plasmid is the most commonly used form of vector at present. However, the invention is intended to include such other forms of expression vectors that serve equivalent functions and which are, or become, known in the art.
  • the neutral metalloprotease gene is ligated into an appropriate expression plasmid.
  • the cloned neutral metalloprotease gene is then used to transform or transfect a host cell in order to express the neutral metalloprotease gene.
  • This plasmid may replicate in hosts in the sense that it contains the well-known elements necessary for plasmid replication or the plasmid may be designed to integrate into the host chromosome. The necessary elements are provided for efficient gene expression (e.g., a promoter operably linked to the gene of interest).
  • these necessary elements are supplied as the gene's own homologous promoter if it is recognized, (Le., transcribed, by the host), a transcription terminator (a polyadenylation region for eukaryotic host cells) which is exogenous or is supplied by the endogenous terminator region of the neutral metalloprotease gene.
  • a selection gene such as an antibiotic resistance gene that enables continuous cultural maintenance of plasmid-infected host cells by growth in antimicrobial-containing media is also included.
  • cassette mutagenesis method may be used to facilitate the construction of the neutral metalloprotease variants of the present invention, although other methods may be used.
  • a naturally-occurring gene encoding the neutral metalloprotease is obtained and sequenced in whole or in part. Then, the sequence is scanned for a point at which it is desired to make a mutation (deletion, insertion or substitution) of one or more amino acids in the encoded neutral metalloprotease.
  • the sequences flanking this point are evaluated for the presence of restriction sites for replacing a short segment of the gene with an oligonucleotide pool which when expressed will encode various mutants.
  • restriction sites are preferably unique sites within the protein gene so as to facilitate the replacement of the gene segment.
  • restriction site which is not overly redundant in the neutral metalloprotease gene may be used, provided the gene fragments generated by restriction digestion can be reassembled in proper sequence. If restriction sites are not present at locations within a convenient distance from the selected point (from 10 to 15 nucleotides), such sites are generated by substituting nucleotides in the gene in such a fashion that neither the reading frame nor the amino acids encoded are changed in the final construction. Mutation of the gene in order to change its sequence to conform to the desired sequence is accomplished by M 13 primer extension in accord with generally known methods.
  • flanking regions are made routine by the redundancy of the genetic code, a restriction enzyme map of the gene and the large number of different restriction enzymes. Note that if a convenient flanking restriction site is available, the above method need be used only in connection with the flanking region which does not contain a site.
  • the restriction sites flanking the positions to be mutated are digested with the cognate restriction enzymes and a plurality of end termini-complementary oligonucleotide cassettes are ligated into the gene.
  • the mutagenesis is simplified by this method because all of the oligonucleotides can be synthesized so as to have the same restriction sites, and no synthetic linkers are necessary to create the restriction sites.
  • corresponding to refers to a residue at the enumerated position in a protein or peptide, or a residue that is analogous, homologous, or equivalent to an enumerated residue in a protein or peptide.
  • corresponding region generally refers to an analogous position along related proteins or a parent protein.
  • nucleic acid molecule encoding refers to the order or sequence of deoxyribonucleotides along a strand of deoxyribonucleic acid. The order of these deoxyribonucleotides determines the order of amino acids along the polypeptide (protein) chain. The DNA sequence thus codes for the amino acid sequence.
  • analogous sequence refers to a sequence within a protein that provides similar function, tertiary structure, and/or conserved residues as the protein of interest (i.e., typically the original protein of interest). For example, in epitope regions that contain an alpha helix or a beta sheet structure, the replacement amino acids in the analogous sequence preferably maintain the same specific structure.
  • the term also refers to nucleotide sequences, as well as amino acid sequences. In some embodiments, analogous sequences are developed such that the replacement amino acids result in a variant enzyme showing a similar or improved function.
  • the tertiary structure and/or conserved residues of the amino acids in the protein of interest are located at or near the segment or fragment of interest.
  • the replacement amino acids preferably maintain that specific structure.
  • homologous protein refers to a protein ⁇ e.g., neutral metalloprotease) that has similar action and/or structure, as a protein of interest (e.g., an neutral metalloprotease from another source). It is not intended that homologs (also referred to herein as “homologues”) be necessarily related evolutionarily. Thus, it is intended that the term encompass the same or similar enzyme(s) (i.e., in terms of structure and function) obtained from different species.
  • homologous genes refers to at least a pair of genes from different species, which genes correspond to each other and which are identical or very similar to each other.
  • the term encompasses genes that are separated by speciation (Le., the development of new species) (e.g., orthologous genes), as well as genes that have been separated by genetic duplication (e.g., paralogous genes).
  • orthologous proteins genes in different species that have evolved from a common ancestral gene (Le., a homologous gene) by speciation. Typically, orthologs retain the same function during the course of evolution. Identification of orthologs finds use in the reliable prediction of gene function in newly sequenced genomes.
  • paralog and “paralogous genes” refer to genes that are related by duplication within a genome. While orthologs retain the same function through the course of evolution, paralogs evolve new functions, even though some functions are often related to the original one. Examples of paralogous genes include, but are not limited to genes encoding trypsin, chymotrypsin, elastase, and thrombin, which are all serine proteinases and occur together within the same species.
  • wild-type and wild-type proteins are those found in nature.
  • the wild-type sequence refers to a sequence of interest that is the starting point of a protein engineering project.
  • the genes encoding the naturally-occurring protein may be obtained in accord with the general methods known to those skilled in the art. The methods generally comprise synthesizing labeled probes having putative sequences encoding regions of the protein of interest, preparing genomic libraries from organisms expressing the protein, and screening the libraries for the gene of interest by hybridization to the probes. Positively hybridizing clones are then mapped and sequenced.
  • recombinant DNA molecule refers to a DNA molecule that is comprised of segments of DNA joined together by means of molecular biological techniques.
  • oligonucleotide refers to an oligonucleotide created using molecular biological manipulations, including but not limited to, the ligation of two or more oligonucleotide sequences generated by restriction enzyme digestion of a polynucleotide sequence, the synthesis of oligonucleotides (e.g., the synthesis of primers or oligonucleotides) and the like.
  • the degree of homology between sequences may be determined using any suitable method known in the art (See e.g., Smith and Waterman, Adv. Appl. Math., 2:482 [1981]; Needleman and Wunsch, J. MoI. Biol., 48:443 [1970]; Pearson and Lipman, Proc. Natl. Acad. Sci. USA 85:2444 [1988]; programs such as GAP, BESTFIT, FASTA, and TFASTA in the Wisconsin Genetics Software Package (Genetics Computer Group, Madison, WI); and Devereux et al., Nucl. Acid Res., 12:387-395 [1984]).
  • PILEUP is a useful program to determine sequence homology levels.
  • PDLEUP creates a multiple sequence alignment from a group of related sequences using progressive, pairwise alignments. It can also plot a tree showing the clustering relationships used to create the alignment.
  • PILEUP uses a simplification of the progressive alignment method of Feng and Doolittle, (Feng and Doolittle, J. MoI. Evol., 35:351-360 [1987]). The method is similar to that described by Higgins and Sharp (Higgins and Sharp, CABIOS 5: 151-153 [1989]).
  • Useful PILEUP parameters including a default gap weight of 3.00, a default gap length weight of 0.10, and weighted end gaps.
  • BLAST algorithm Another example of a useful algorithm is the BLAST algorithm, described by Altschul et ah, (Altschul et al., J. MoI. Biol., 215:403-410, [1990]; and Karlin et al, Proc. Natl. Acad. Sci. USA 90:5873-5787 [1993]).
  • WU-BLAST-2 program One particularly useful BLAST program is the WU-BLAST-2 program ⁇ See, Altschul et al., Meth. Enzymol., 266:460-480 [1996]). parameters "W,” "T,” and "X" determine the sensitivity and speed of the alignment.
  • the BLAST program uses as defaults a wordlength (W) of 11, the BLOSUM62 scoring matrix (See, Henikoff and Henikoff, Proc. Natl. Acad. Sci. USA 89:10915 [1989]) alignments (B) of 50, expectation (E) of 10, M'5, N'-4, and a comparison of both strands.
  • percent (%) nucleic acid sequence identity is defined as the percentage of nucleotide residues in a candidate sequence that is identical with the nucleotide residues of the sequence.
  • hybridization refers to the process by which a strand of nucleic acid joins with a complementary strand through base pairing, as known in the art.
  • hybridization conditions refers to the conditions under which hybridization reactions are conducted. These conditions are typically classified by degree of “stringency” of the conditions under which hybridization is measured.
  • the degree of stringency can be based, for example, on the melting temperature (Tm) of the nucleic acid binding complex or probe.
  • Tm melting temperature
  • “maximum stringency” typically occurs at about Tm-5°C (5° below the Tm of the probe); “high stringency” at about 5-10° below the Tm; “intermediate stringency” at about 10-20° below the Tm of the probe; and “low stringency” at about 20-25° below the Tm.
  • maximum stringency conditions may be used to identify nucleic acid sequences having strict identity or near-strict identity with the hybridization probe; while high stringency conditions are used to identify nucleic acid sequences having about 80% or more sequence identity with the probe.
  • a polynucleotide or polypeptide comprises a sequence that has at least about 40% identity, more preferable at least about 50% identity, yet more preferably at least about 60% identity, preferably at least about 75% identity, more preferably at least about 80% identity, yet more preferably at least about 90%, still more preferably about 95%, most preferably about 97% identity, sometimes as much as about 98% and about 99% sequence identity, compared to the reference (i.e., wild-type) sequence.
  • Sequence identity may be determined using known programs such as BLAST, ALIGN, and CLUSTAL using standard parameters.
  • BLAST Altschul, et al, J. MoI. Biol. 215:403-410 [1990]; Henikoff et al, Proc. Natl. Acad. Sci. USA 89:10915 [1989]; Karin et al, Proc. Natl. Acad. Sci USA 90:5873 [1993]; and Higgins et al, Gene 73:237 - 244 [1988]).
  • Software for performing BLAST analyses is publicly available through the National
  • polypeptides are substantially identical.
  • the first polypeptide is immunologically cross- reactive with the second polypeptide.
  • polypeptides that differ by conservative amino acid substitutions are immunologically cross-reactive.
  • a polypeptide is substantially identical to a second polypeptide, for example, where the two peptides differ only by a conservative substitution.
  • Another indication that two nucleic acid sequences are substantially identical is that the two molecules hybridize to each other under stringent conditions (e.g., within a range of medium to high stringency).
  • equivalent residues refers to proteins that share particular amino acid residues.
  • equivalent resides may be identified by determining homology at the level of tertiary structure for a protein (e.g., neutral metalloprotease) whose tertiary structure has been determined by x-ray crystallography.
  • Equivalent residues are defined as those for which the atomic coordinates of two or more of the main chain atoms of a particular amino acid residue of the protein having putative equivalent residues and the protein of interest (N on N, CA on CA, C on C and O on O) are within 0.13 nm and preferably 0.1 nm after alignment.
  • Hybrid neutral metalloproteases and “fusion neutral metalloproteases” refer to proteins that are engineered from at least two different or “parental” proteins. In preferred embodiments, these parental proteins are homologs of one another.
  • a preferred hybrid neutral metalloprotease or fusion protein contains the N-terminus of a protein and the C-terminus of a homolog of the protein.
  • the two terminal ends are combined to correspond to the full-length active protein.
  • regulatory element refers to a genetic element that controls some aspect of the expression of nucleic acid sequences.
  • a promoter is a regulatory element which facilitates the initiation of transcription of an operably linked coding region. Additional regulatory elements include splicing signals, polyadenylation signals and termination signals.
  • host cells are generally prokaryotic or eukaryotic hosts which are transformed or transfected with vectors constructed using recombinant DNA techniques known in the art. Transformed host cells are capable of either replicating vectors encoding the protein variants or expressing the desired protein variant. In the case of vectors which encode the pre- or prepro-form of the protein variant, such variants, when expressed, are typically secreted from the host cell into the host cell medium.
  • the term "introduced" in the context of inserting a nucleic acid sequence into a cell means transformation, transduction or transfection.
  • Means of transformation include protoplast transformation, calcium chloride precipitation, electro oration, naked DNA and the like as known in the art. ⁇ See, Chang and Cohen, MoI. Gen. Genet., 168:111 - 115 [1979]; Smith et al, Appl. Env. Microbiol., 51:634 [1986]; and the review article by Ferrari et al, in Harwood, Bacillus, Plenum Publishing Corporation, pp. 57-72 [1989]).
  • promoter/enhancer denotes a segment of DNA which contains sequences capable of providing both promoter and enhancer functions (for example, the long terminal repeats of retroviruses contain both promoter and enhancer functions).
  • the enhancer/promoter may be "endogenous” or “exogenous” or “heterologous.”
  • An endogenous enhancer/promoter is one which is naturally linked with a given gene in the genome.
  • An exogenous (heterologous) enhancer/promoter is one which is placed in juxtaposition to a gene by means of genetic manipulation ⁇ i.e., molecular biological techniques).
  • the presence of "splicing signals" on an expression vector often results in higher levels of expression of the recombinant transcript.
  • Splicing signals mediate the removal of introns from the primary RNA transcript and consist of a splice donor and acceptor site (Sambrook et al, Molecular Cloning: A Laboratory Manual, 2nd ed., Cold Spring Harbor Laboratory Press, New York [1989], pp. 16.7-16.8).
  • a commonly used splice donor and acceptor site is the splice junction from the 16S RNA of SV40.
  • stable transfection or "stably transfected” refers to the introduction and integration of foreign DNA into the genome of the transfected cell.
  • stable transfectant refers to a cell which has stably integrated foreign or exogenous DNA into the genomic DNA of the transfected cell.
  • selectable marker or “selectable gene product” as used herein refer to the use of a gene which encodes an enzymatic activity that confers resistance to an antibiotic or drug upon the cell in which the selectable marker is expressed.
  • amplification and “gene amplification” refer to a process by which specific DNA sequences are disproportionately replicated such that the amplified gene becomes present in a higher copy number than was initially present in the genome.
  • selection of cells by growth in the presence of a drug results in the amplification of either the endogenous gene encoding the gene product required for growth in the presence of the drug or by amplification of exogenous (i.e., input) sequences encoding this gene product, or both.
  • Selection of cells by growth in the presence of a drug may result in the amplification of either the endogenous gene encoding the gene product required for growth in the presence of the drug or by amplification of exogenous (i.e., input) sequences encoding this gene product, or both.
  • a drug e.g., an inhibitor of an inhibitable enzyme
  • “Amplification” is a special case of nucleic acid replication involving template specificity. It is to be contrasted with non-specific template replication (i.e., replication that is template-dependent but not dependent on a specific template). Template specificity is here distinguished from fidelity of replication (i.e., synthesis of the proper polynucleotide sequence) and nucleotide (ribo- or deoxyribo-) specificity.
  • Target sequences are “targets” in the sense that they are sought to be sorted out from other nucleic acid. Amplification techniques have been designed primarily for this sorting out.
  • co-amplification refers to the introduction into a single cell of an amplifiable marker in conjunction with other gene sequences (i.e., comprising one or more non-selectable genes such as those contained within an expression vector) and the application of appropriate selective pressure such that the cell amplifies both the amplifiable marker and the other, non-selectable gene sequences.
  • the amplifiable marker may be physically linked to the other gene sequences or alternatively two separate pieces of DNA, one containing the amplifiable marker and the other containing the non-selectable marker, may be introduced into the same cell.
  • amplifiable marker refers to a marker, gene or a vector encoding a gene which permits the amplification of that gene under appropriate growth conditions.
  • sample template refers to nucleic acid originating from a sample which is analyzed for the presence of "target” (defined below).
  • background template is used in reference to nucleic acid other than sample template which may or may not be present in a sample. Background template is most often inadvertent. It may be the result of carryover, or it may be due to the presence of nucleic acid contaminants sought to be purified away from the sample. For example, nucleic acids from organisms other than those to be detected may be present as background in a test sample.
  • Tempor specificity is achieved in most amplification techniques by the choice of enzyme.
  • Amplification enzymes are enzymes that, under conditions they are used, will process only specific sequences of nucleic acid in a heterogeneous mixture of nucleic acid.
  • MDV-I RNA is the specific template for the replicase (See e.g., Kacian et al, Proc. Natl. Acad. Sci. USA 69:3038 [1972]).
  • Other nucleic acids are not replicated by this amplification enzyme.
  • this amplification enzyme has a stringent specificity for its own promoters (See, Chamberlin et al, Nature 228:227 [1970]).
  • T4 DNA ligase the enzyme will not ligate the two oligonucleotides or polynucleotides, where there is a mismatch between the oligonucleotide or polynucleotide substrate and the template at the ligation junction (See, Wu and Wallace, Genomics 4:560 [1989]).
  • Taq and Pfu polymerases by virtue of their ability to function at high temperature, are found to display high specificity for the sequences bounded and thus defined by the primers; the high temperature results in thermodynamic conditions that favor primer hybridization with the target sequences and not hybridization with non-target sequences.
  • the term "primer” refers to an oligonucleotide, whether occurring naturally as in a purified restriction digest or produced synthetically, which is capable of acting as a point of initiation of synthesis when placed under conditions in which synthesis of a primer extension product which is complementary to a nucleic acid strand is induced, ⁇ i.e., in the presence of nucleotides and an inducing agent such as DNA polymerase and at a suitable temperature and pH).
  • the primer is preferably single stranded for maximum efficiency in amplification, but may alternatively be double stranded. If double stranded, the primer is first treated to separate its strands before being used to prepare extension products.
  • the primer is an oligodeoxyribonucleotide.
  • the primer must be sufficiently long to prime the synthesis of extension products in the presence of the inducing agent. The exact lengths of the primers will depend on many factors, including temperature, source of primer and the use of the method.
  • probe refers to an oligonucleotide ⁇ i.e., a sequence of nucleotides), whether occurring naturally as in a purified restriction digest or produced synthetically, recombinantly or by PCR amplification, which is capable of hybridizing to another oligonucleotide of interest.
  • a probe may be single-stranded or double-stranded.
  • Probes are useful in the detection, identification and isolation of particular gene sequences. It is contemplated that any probe used in the present invention will be labeled with any "reporter molecule,” so that is detectable in any detection system, including, but not limited to enzyme ⁇ e.g., ELISA, as well as enzyme-based histochemical assays), fluorescent, radioactive, and luminescent systems. It is not intended that the present invention be limited to any particular detection system or label.
  • the term “polymerase chain reaction” (“PCR”) refers to the methods of U.S. Patent Nos. 4,683,195, 4,683,202, and 4,965,188, hereby incorporated by reference, which include methods for increasing the concentration of a segment of a target sequence in a mixture of genomic DNA without cloning or purification.
  • This process for amplifying the target sequence consists of introducing a large excess of two oligonucleotide primers to the DNA mixture containing the desired target sequence, followed by a precise sequence of thermal cycling in the presence of a DNA polymerase.
  • the two primers are complementary to their respective strands of the double stranded target sequence.
  • the mixture is denatured and the primers then annealed to their complementary sequences within the target molecule.
  • the primers are extended with a polymerase so as to form a new pair of complementary strands.
  • the steps of denaturation, primer annealing and polymerase extension can be repeated many times (i.e., denaturation, annealing and extension constitute one "cycle”; there can be numerous “cycles”) to obtain a high concentration of an amplified segment of the desired target sequence.
  • the length of the amplified segment of the desired target sequence is determined by the relative positions of the primers with respect to each other, and therefore, this length is a controllable parameter.
  • the method is referred to as the “polymerase chain reaction” (hereinafter "PCR”). Because the desired amplified segments of the target sequence become the predominant sequences (in terms of concentration) in the mixture, they are said to be "PCR amplified”.
  • amplification reagents refers to those reagents (deoxyribonucleotide triphosphates, buffer, etc.), needed for amplification except for primers, nucleic acid template and the amplification enzyme.
  • amplification reagents along with other reaction components are placed and contained in a reaction vessel (test tube, microwell, etc.).
  • PCR it is possible to amplify a single copy of a specific target sequence in genomic DNA to a level detectable by several different methodologies (e.g., hybridization with a labeled probe; incorporation of biotinylated primers followed by avidin-enzyme conjugate detection; incorporation of 32 P-labeled deoxynucleotide triphosphates, such as dCTP or dATP, into the amplified segment).
  • any oligonucleotide or polynucleotide sequence can be amplified with the appropriate set of primer molecules.
  • the amplified segments created by the PCR process itself are, themselves, efficient templates for subsequent PCR amplifications.
  • PCR product refers to the resultant mixture of compounds after two or more cycles of the PCR steps of denaturation, annealing and extension are complete. These terms encompass the case where there has been amplification of one or more segments of one or more target sequences.
  • restriction endonucleases and “restriction enzymes” refer to bacterial enzymes, each of which cut double-stranded DNA at or near a specific nucleotide sequence.
  • the present invention provides methods and compositions comprising at least one neutral metalloprotease enzyme that has improved storage stability.
  • the neutral metalloprotease finds use in cleaning and other applications.
  • the present invention provides methods and compositions comprising neutral metalloprotease(s) obtained from Bacillus sp.
  • the neutral metalloprotease is obtained from B. amyloliquefaciens.
  • the neutral metalloprotease is a variant of the B. amyloliquefaciens neutral metalloprotease.
  • the neutral metalloprotease is a homolog of the the B. amyloliquefaciens neutral metalloprotease.
  • the present invention finds particular use in applications including, but not limited to cleaning, bleaching and disinfecting. Also as described in more detail in the Examples below, the present invention provides many advantages for cleaning of a wide range of objects, including but not limited to clothing, fabrics, medical devices, etc. In addition, the present invention provides compositions that are effective in cleaning, bleaching, and disinfecting, over a range of wash temperatures and pHs.
  • proteases hydrolyze amide linkages of proteins via addition of a water molecule to the peptide bond(s). Cleavage occurs at the carbonyl-group of the peptide bond.
  • bacterial species such as Bacillus, there are two main classes of extracellular proteases namely, alkaline or serine proteases and neutral metalloproteases.
  • Neutral metalloendopeptidases i.e., neutral metalloproteases (EC 3.4.24.4) belong to a protease class that has an absolute requirement for zinc ions for catalytic activity. These enzymes are optimally active at neutral pH and are in the 30 to 40 kDa size range.
  • Neutral metalloproteases bind between two and four calcium ions that contribute to the structural stability of the protein. The bound metal ion at the active site of metalloproteases is an essential feature that allows the activation of a water molecule. The water molecule then functions as the nucleophile and cleaves the carbonyl group of the peptide bond.
  • the neutral zinc-binding metalloprotease family includes the bacterial enzyme thermolysin, and thermolysin-like proteases ("TLPs"), as well as carboxypeptidase A (a digestive enzyme), and the matrix metalloproteases that catalyze the reactions in tissue remodeling and degradation.
  • TLPs thermolysin-like proteases
  • carboxypeptidase A a digestive enzyme
  • TLPs thermolysin and its variants
  • compositions and methods to engineer neutral metalloproteases with improved characteristics are provided herein.
  • calcium ions have been reported for other proteases such as thermolysin to prevent autolysis.
  • the B. stearothermophilus neutral protease has been stabilized against autolysis and proteolytic degradation by addition of calcium (See, Durrschmidt et al, FEBS J., 272:1523-1534 [2005]).
  • the present invention provides compositions and methods suitable for the engineering of neutral metalloproteases that are independent of calcium in order to maintain their structural stability.
  • engineering prevents the local unfolding in a particular secondary structural element that may prevent proteolysis.
  • Natural and engineered proteases, such as subtilisin are often expressed in Bacillus subtilis and several have been applied in detergent formulations to remove proteinaceous stains. Others have been applied for example in the baking industry ⁇ e.g., thermolysin from Bacillus thermoproteolyticus; See e.g., Galante and Formantici, Curr. Organic Chem., 7, 1399-1422 [2003]).
  • the serine proteases have been more widely utilized in detergents, at least partially due to the relative ease with which these proteases can be stabilized.
  • metalloproteases are less frequently used in industry, and particularly in the detergent industry for a number of reasons. These enzymes involve more complex protein systems, as the enzymes have the absolute requirement for calcium and zinc ions for stability and function, respectively. Further, the detergent solution as well as the water used in the laundry process often contains components that often interfere with the binding of the ions by the enzyme or chelate these ions, resulting in a decrease or loss of proteolytic function and destabilization of the protease. In contrast to the currently used metalloprotease enzyme systems, the present invention provides neutral metalloproteases that are sufficiently stabilized to facilitate long- term shelf storage in liquid laundry detergent compositions.
  • the metalloprotease stability and activity are preserved through complexing the enzyme with its obligatory active-site zinc molecule.
  • the combination of calcium and zinc ions does not have a deleterious effect on the enzyme's function.
  • the neutral metalloprotease stabilized is the wild-type metalloprotease from Bacillus amyloliquefaciens (e.g., purified MULTIFECT® Neutral; "PMN”).
  • recombinant neutral metalloprotease e.g., Bacillus amyloliquefaciens neutral metalloprotease cloned into Bacillus subtilis (“nprE)).
  • metalloproteases with improved stability encompass enzymes with increased affinity for one or more of the calcium binding sites of the enzyme.
  • the neutral metalloproteases of the present invention find use in general detergent applications, including but not limited to cold water temperatures, grass stains, and/or low pH conditions.
  • the present invention provides conditions that stabilize zinc-binding neutral metalloprotease for increased storage stability in detergent bases and/or compositions.
  • the detergent compositions comprise at least one metalloprotease (e.g., any Bacillus neutral metalloprotease) that is stabilized against autolysis and unfolding, by the inclusion within the detergent formulation of the essential zinc and/or calcium ions.
  • the neutral metalloprotease from Bacillus amyloliquefaciens (PMN) and the recombinant form expressed in Bacillus subtilis (nprE) that bind zinc ion with 10-fold greater affinity than the calcium ion find use in the present invention.
  • the stabilized protease in the presence of essential zinc ions has improved stability against proteolysis when compared to the same proteases with in the absence of ions.
  • compositions comprising the addition of zinc to increase the storage life of neutral metalloprotease in the presence of detergent components.
  • the zinc cation is replaced with Co 2+ , Mn 2+ or Fe 2+ , since all of these ions have been shown to bind and restore the protease activity of neutral metalloproteases.
  • Mn 2+ and Fe 2+ do not restore all of the native activity.
  • Co 2+ restores the highest percentage of the activity, it is apparently less firmly bound than Zn 2+ .
  • the zinc cation is an essential feature in the active site of all neutral metalloproteases, as it is known to play a role in substrate binding and enzyme catalysis ⁇ See e.g., Holmquist and Vallee, J. Biol. Chem., 249:4601-4607 [1974]).
  • the present invention provides extremely beneficial opportunities for application in the production and development of industrial detergents.
  • Many detergents are available with high specificity towards the removal of protein, starch and grease stains.
  • the better wash performance of PMN or neutral metalloprotease from B. amyloliquefaciens on Equest Grass (Warwick) indicates that the neutral metalloproteases of the present invention in a detergent base that also contains zinc finds use in improved detergent compositions.
  • Enzyme components weights are based on total active protein. All percentages and ratios are calculated by weight unless otherwise indicated. All percentages and ratios are calculated based on the total composition unless otherwise indicated.
  • the enzymes levels are expressed by pure enzyme by weight of the total composition and unless otherwise specified, the detergent ingredients are expressed by weight of the total compositions.
  • the stabilized neutral metalloproteases of the present invention are useful in formulating various detergent compositions.
  • the cleaning composition of the present invention may be advantageously employed for example, in laundry applications, hard surface cleaning, automatic dishwashing applications, as well as cosmetic applications such as dentures, teeth, hair and skin.
  • the enzymes of the present invention are ideally suited for laundry applications such as the bleaching of fabrics.
  • the enzymes of the present invention find use in both granular and liquid compositions.
  • a cleaning additive product including at least one enzyme of the present invention is ideally suited for inclusion in a wash process when additional bleaching effectiveness is desired. Such instances include, but are not limited to low temperature solution cleaning applications.
  • the additive product may be, in its simplest form, one or more neutral metalloprotease enzyme as provided by the present invention.
  • the additive is packaged in dosage form for addition to a cleaning process where a source of peroxygen is employed and increased bleaching effectiveness is desired.
  • the single dosage form comprises a pill, tablet, gelcap or other single dosage unit including pre- measured powders and/or liquids.
  • filler and/or carrier material(s) are included, in order to increase the volume of such composition.
  • Suitable filler or carrier materials include, but are not limited to, various salts of sulfate, carbonate and silicate as well as talc, clay and the like.
  • filler and/or carrier materials for liquid compositions include water and/or low molecular weight primary and secondary alcohols including polyols and diols. Examples of such alcohols include, but are not limited to, methanol, ethanol, propanol and isopropanol.
  • the compositions comprise from about 5% to about 90% of such materials.
  • acidic fillers are used to reduce the pH of the composition.
  • the cleaning additive includes at least one activated peroxygen source as described below and/or adjunct ingredients as more fully described below.
  • the cleaning compositions and cleaning additives of the present invention require an effective amount of neutral metalloprotease enzyme as provided in the present invention.
  • the required level of enzyme is achieved by the addition of one or more species of neutral metalloprotease provided by the present invention.
  • the cleaning compositions of the present invention comprise at least 0.0001 weight percent, from about 0.0001 to about 1, from about 0.001 to about 0.5, or even from about 0.01 to about 0.1 weight percent of at least one neutral metalloprotease provided by the present invention.
  • the cleaning compositions provided herein are typically formulated such that, during use in aqueous cleaning operations, the wash water has a pH of from about 5.0 to about 11.5, or in alternative embodiments, even from about 6.0 to about 10.5.
  • liquid product formulations are typically formulated to have a neat pH from about 3.0 to about 9.0, while in some alternative embodiments the formulation has a neat pH from about 3 to about 5.
  • granular laundry products are typically formulated to have a pH from about 8 to about 11. Techniques for controlling pH at recommended usage levels include the use of buffers, alkalis, acids, etc., and are well known to those skilled in the art.
  • the neutral metalloprotease when at least one neutral metalloprotease is employed in a granular composition or liquid, the neutral metalloprotease is in the form of an encapsulated particle to protect the enzyme from other components of the granular composition during storage.
  • encapsulation also provides a means of controlling the availability of the neutral metalloprotease(s) during the cleaning process and may enhance performance of the neutral metalloprotease(s). It is contemplated that the encapsulated neutral metalloproteases of the present invention will find use in various settings. It is also intended that the neutral metalloprotease be encapsulated using any suitable encapsulating material(s) and method(s) known in the art.
  • the encapsulating material typically encapsulates at least part of the neutral metalloprotease catalyst.
  • the encapsulating material is water-soluble and/or water-dispersible.
  • the encapsulating material has a glass transition temperature (Tg) of O 0 C or higher (See e.g., WO 97/11151, particularly from page 6,line 25 to page 7, line 2, for more information regarding glass transition temperatures).
  • the encapsulating material is selected from the group consisting of carbohydrates, natural or synthetic gums, chitin and chitosan, cellulose and cellulose derivatives, silicates, phosphates, borates, polyvinyl alcohol, polyethylene glycol, paraffin waxes and combinations thereof.
  • the encapsulating material is a carbohydrate, it is selected from the group consisting of monosaccharides, oligosaccharides, polysaccharides, and combinations thereof.
  • the encapsulating material is a starch ⁇ See e.g., EP 0 922 499; US 4,977,252. US 5,354,559, and US 5,935,826, for descriptions of some exemplary suitable starches).
  • the encapsulating material comprises a microsphere made from plastic(e.g., thermoplastics, acrylonitrile, methacrylonitrile, polyacrylonitrile, polymethacrylonitrile and mixtures thereof; commercially available microspheres that find use include, but are not limited to EXPANCEL® [Casco Products, Sweden], PM 6545, PM 6550, PM 7220, PM 7228, EXTENDOSPHERES®, and Q-CEL® [PQ Corp., Valley Forge, PA], LUXSIL® and SPHERICELl® [Potters Industries, Inc., Carlstadt, NJ and Valley Forge, PA]).
  • plastic e.g., thermoplastics, acrylonitrile, methacrylonitrile, polyacrylonitrile, polymethacrylonitrile and mixtures thereof; commercially available microspheres that find use include, but are not limited to EXPANCEL® [Casco Products, Sweden], PM 6545, PM 6550, PM 7220, PM 7228, EX
  • the cleaning compositions of the present invention are formulated into any suitable form and prepared by any process chosen by the formulator, (See e.g., U.S. 5,879,584, U.S. 5,691,297, U.S. 5,574,005, U.S. 5,569,645, U.S. 5,565,422, U.S. 5,516,448, U.S. 5,489,392, and U.S. 5,486,303, for some non-limiting examples).
  • the pH of such composition is adjusted via the addition of an acidic material such as HCl.
  • adjuncts described herein are suitable for use in the cleaning compositions of the present invention. Indeed, in some embodiments, adjuncts are incorporated into the cleaning compositions of the present invention. In some embodiments, adjunct materials assist and/or enhance cleaning performance, treat the substrate to be cleaned, and/or modify the aesthetics of the cleaning composition (e.g., perfumes, colorants, dyes, etc.). It is understood that such adjuncts are in addition to the neutral metalloproteases of the present invention. The precise nature of these additional components, and levels of incorporation thereof, depends on the physical form of the composition and the nature of the cleaning operation for which it is to be used.
  • Suitable adjunct materials include, but are not limited to, surfactants, builders, chelating agents, dye transfer inhibiting agents, deposition aids, dispersants, additional enzymes, and enzyme stabilizers, catalytic materials, bleach activators, bleach boosters, hydrogen peroxide, sources of hydrogen peroxide, preformed peracids, polymeric dispersing agents, clay soil removal/anti-redeposition agents, brighteners, suds suppressors, dyes, perfumes, structure elasticizing agents, fabric softeners, carriers, hydrotropes, processing aids and/or pigments.
  • additional examples are known in the art (See e.g., U.S. Patent Nos.
  • adjunct ingredients constitute the balance of the cleaning compositions of the present invention.
  • the cleaning compositions of the present invention comprise at least one surfactant or surfactant system, wherein the surfactant is selected from nonionic surfactants, anionic surfactants, cationic surfactants, ampholytic surfactants, zwitterionic surfactants, semi-polar nonionic surfactants, and mixtures thereof.
  • the surfactant is selected from nonionic surfactants, anionic surfactants, cationic surfactants, ampholytic surfactants, zwitterionic surfactants, semi-polar nonionic surfactants, and mixtures thereof.
  • the surfactant is present at a level of from about 0.1 % to about
  • the level is from about 1% to about 50% , while in still further embodiments, the level is from about 5% to about 40%, by weight of the cleaning composition.
  • the cleaning compositions of the present invention comprise one or more detergent builders or builder systems. In some embodiments incorporating at least one builder, the cleaning compositions comprise at least about 1%, from about 3% to about 60% or even from about 5% to about 40% builder by weight of the cleaning composition.
  • Builders include, but are not limited to, the alkali metal, ammonium and alkanolammonium salts of polyphosphates, alkali metal silicates, alkaline earth and alkali metal carbonates, aluminosilicate builders polycarboxylate compounds, ether hydroxypolycarboxylates, copolymers of maleic anhydride with ethylene or vinyl methyl ether, 1, 3, 5-trihydroxy benzene-2, 4, 6-trisulphonic acid, and carboxymethyloxysuccinic acid, the various alkali metal, ammonium and substituted ammonium salts of polyacetic acids such as ethylenediamine tetraacetic acid and nitrilotriacetic acid, as well as polycarboxylates such as mellitic acid, succinic acid, citric acid, oxydisuccinic acid, polymaleic acid, benzene 1,3,5-tricarboxylic acid, carboxymethyloxysuccinic acid, and soluble salts thereof.
  • the cleaning compositions of the present invention contain at least one chelating agent, Suitable chelating agents include, but are not limited to copper, iron and/or manganese chelating agents and mixtures thereof. In embodiments in which at least one chelating agent is used, the cleaning compositions of the present invention comprise from about 0.1% to about 15% or even from about 3.0% to about 10% chelating agent by weight of the subject cleaning composition.
  • Deposition Aid - In some embodiments, the cleaning compositions of the present invention include at least one deposition aid.
  • Suitable deposition aids include, but are not limited to polyethylene glycol, polypropylene glycol, polycarboxylate, soil release polymers such as polytelephthalic acid, clays such as kaolinite, montmorillonite, atapulgite, illite, bentonite, halloysite, and mixtures thereof.
  • the cleaning compositions of the present invention include one or more dye transfer inhibiting agents.
  • Suitable polymeric dye transfer inhibiting agents include, but are not limited to, polyvinylpyrrolidone polymers, polyamine N-oxide polymers, copolymers of N-vinylpyrrolidone and N- vinylimidazole, polyvinyloxazolidones and polyvinylimidazoles or mixtures thereof.
  • the cleaning compositions of the present invention comprise from about 0.0001% to about 10%, from about 0.01% to about 5%, or even from about 0.1% to about 3% by weight of the cleaning composition.
  • Dispersants - In some embodiments, the cleaning compositions of the present invention contains at least one dispersants.
  • Suitable water-soluble organic materials include, but are not limited to the homo- or co-polymeric acids or their salts, in which the polycarboxylic acid comprises at least two carboxyl radicals separated from each other by not more than two carbon atoms.
  • the cleaning compositions of the present invention comprise one or more detergent enzymes which provide cleaning performance and/or fabric care benefits.
  • suitable enzymes include, but are not limited to, hemicellulases, peroxidases, proteases, cellulases, xylanases, lipases, phospholipases, esterases, cutinases, pectinases, keratinases, reductases, oxidases, phenoloxidases, lipoxygenases, ligninases, pullulanases, tannases, pentosanases, malanases, ⁇ -glucanases, arabinosidases, hyaluronidase, chondroitinase, laccase, and amylases, or mixtures thereof.
  • a combination of enzymes comprising conventional applicable enzymes like protease, lipase, cutinase and/or cellulase in conjunction with amylase is used.
  • Enzyme Stabilizers -
  • the enzymes used in the detergent formulations of the present invention are stabilized. It is contemplated that various techniques for enzyme stabilization will find use in the present invention.
  • the enzymes employed herein are stabilized by the presence of water-soluble sources of zinc (II), calcium (II) and/or magnesium (II) ions in the finished compositions that provide such ions to the enzymes, as well as.
  • the cleaning compositions of the present invention contain one or more catalytic metal complexes.
  • a metal -containing bleach catalyst finds use.
  • the metal bleach catalyst comprises a catalyst system comprising a transition metal cation of defined bleach catalytic activity, (e.g., copper, iron, titanium, ruthenium, tungsten, molybdenum, or manganese cations), an auxiliary metal cation having little or no bleach catalytic activity
  • a transition metal cation of defined bleach catalytic activity e.g., copper, iron, titanium, ruthenium, tungsten, molybdenum, or manganese cations
  • the cleaning compositions of the present invention are catalyzed by means of a manganese compound.
  • a manganese compound Such compounds and levels of use are well known in the art (See e.g., U.S. 5,576,282).
  • cobalt bleach catalysts find use in the cleaning compositions of the present invention.
  • Various cobalt bleach catalysts are known in the art (See e.g., U.S. 5,597,936, and U.S. 5,595,967).
  • Such cobalt catalysts are readily prepared by known procedures (See e.g., U.S. 5,597,936, and U.S. 5,595,967).
  • the cleaning compositions of the present invention include a transition metal complex of a macropolycyclic rigid ligand ("MRL").
  • MRL macropolycyclic rigid ligand
  • the compositions and cleaning processes provided by the present invention are adjusted to provide on the order of at least one part per hundred million of the active MRL species in the aqueous washing medium, and in some preferred embodiments, provide from about 0.005 ppm to about 25 ppm, more preferably from about 0.05 ppm to about 10 ppm, and most preferably from about 0.1 ppm to about 5 ppm, of the MRL in the wash liquor.
  • Preferred transition-metals in the instant transition-metal bleach catalyst include, but are not limited to manganese, iron and chromium.
  • Preferred MRLs also include, but are not limited to special ultra-rigid ligands that are cross-bridged (e.g., 5,12-diethyl-l,5,8,12- tetraazabicyclo[6.6.2]hexadecane).
  • Suitable transition metal MRLs are readily prepared by known procedures ⁇ See e.g., WO 00/32601, and U.S. 6,225,464).
  • the cleaning compositions of the present invention are formulated into any suitable form and prepared by any suitable process chosen by the formulator, ⁇ See e.g., U.S. 5,879,584, U.S. 5,691,297, U.S. 5,574,005, U.S. 5,569,645, U.S. 5,565,422, U.S. 5,516,448, U.S. 5,489,392, U.S. 5,486,303, U.S. 4,515,705, U.S. 4,537,706, U.S. 4,515,707, U.S. 4,550,862, U.S. 4,561,998, U.S. 4,597,898, U.S. 4,968,451, U.S. 5,565,145, U.S. 5,929,022, U.S. 6,294,514, and U.S. 6,376,445, all of which are incorporated herein by reference for some non-limiting examples).
  • the cleaning compositions of the present invention find use in cleaning surfaces and/or fabrics.
  • at least a portion of the surface and/or fabric is contacted with at least one embodiment of the cleaning compositions of the present invention, in neat form or diluted in a wash liquor, and then the surface and/or fabric is optionally washed and/or rinsed.
  • "washing" includes, but is not limited to, scrubbing, and mechanical agitation.
  • the fabric comprises any fabric capable of being laundered in normal consumer use conditions.
  • the cleaning compositions of the present invention are used at concentrations of from about 500 ppm to about 15,000 ppm in solution.
  • the wash solvent is water
  • the water temperature typically ranges from about 5 0 C to about 90 0 C.
  • the water to fabric mass ratio is typically from about 1 : 1 to about 30: 1.
  • amyloliquefaciens neutral metalloprotease PMN (purified MULTIFECT® metalloprotease); MS (mass spectroscopy); SRI (Stain Removal Index); TIGR (The Institute for Genomic Research, Rockville, MD); AATCC (American Association of Textile and Coloring Chemists); Amersham (Amersham Life Science, Inc. Arlington Heights, IL); Corning (Corning International, Corning, NY); ICN (ICN Pharmaceuticals, Inc., Costa Mesa, CA); Pierce (Pierce Biotechnology, Rockford, IL); Equest (Equest, Warwick International Group, Inc., Flintshire, UK); EMPA (Eidvertische Material Prufungs und compassion Anstalt, St.
  • Vydac Gram Vydac, Hesperia, CA
  • Minolta Konica Minolta, Ramsey, NJ
  • Zeiss Carl Zeiss, Inc., Thornwood, NY.
  • a spectrophotometer was used to measure the absorbance of the products formed after the completion of the reactions.
  • a reflectometer was used to measure the reflectance of the swatches. Unless otherwise indicated, protein concentrations were estimated by Coomassie Plus (Pierce), using BSA as the standard.
  • the Bradford dye reagent (Quick Start) assay was used to determine the protein concentration in NprE protease samples on MTP scale.
  • the chemical and reagent solutions used were:
  • the equipment used was a Biomek FX Robot (Beckman) and a SpectraMAX (type 340) MTP reader; the MTPs were from Costar (type 9017).
  • the MTPs were incubated for at least 10 minutes at room temperature. Possible air bubbles were blown away and the ODs of the wells were read at 595 nm.
  • the background reading i.e., from uninoculated wells
  • the obtained OD 595 values provide a relative measure of the protein content in the samples.
  • the linearity of the NprE calibration lines between 0 to 5 ⁇ g enabled the use of OD 595 nm values as a relative measure for the protein content.
  • the expected content of NprE in supernatant was 200-300 ⁇ g/ml
  • the lO ⁇ l sample volume used in the test contains less than 5 ⁇ g protein, providing values in the linear range.
  • the detergents used in this assay did not contain enzymes.
  • the equipment used was a Biomek FX Robot (Beckman) and a SpectraMAX (type 340) MTP reader; the MTPs were from Costar (type 9017).
  • Microswatches of VA" circular diameter were obtained from CFT. Before cutting of the swatches, the fabric (EMPA 116) was washed with water. Two microswatches were placed in each well of a 96-well microtiter plate vertically to expose the whole surface area (i.e., not flat on the bottom of the well).
  • the incubator was set to 20°C.
  • the filtered culture broth samples were tested at an appropriate concentration by dilution with a mixture of 10 mM NaCl, 0.1 mM CaC12 and 0.005% TWEEN®-80 solution.
  • the desired detergent solution was prepared as described above.
  • 190 ⁇ l of detergent solution was added to each well of the MTP, containing microswatches.
  • 10 ⁇ l of the diluted enzyme solution were added (to provide a total volume of 200 ⁇ l/well).
  • the MTP was sealed with tape and placed in the incubator for 30 minutes, with agitation at 1400 rpm.
  • 100 ⁇ l of solution from each well were removed and placed into a fresh MTP.
  • the new MTP containing 100 ⁇ l of solution/well was read at 405 nm in a MTP reader. Blank controls, as well as a control containing two microswatches and detergent but no enzyme were also included.
  • PI performance index
  • Citrate stability was measured after incubation of wild-type NprE and variants in the presence of 50 mM citrate.
  • the initial and residual activity was determined using the DMC hydrolysis assay.
  • the chemical and reagent solutions used were:
  • HEPES buffer 11.9 g. dissolved in 1000 ml water ( 50 mM)
  • Citrate buffer (free acid) 21.0 g. dissolved in 1000 ml water ( 100 mM)
  • Dilution buffer 1 0.1 mM CaC12/25 mM Tris; pH 8.2
  • Dilution buffer 2 0.1 mM CaC12/50 mM Citrate/25 mM Tris; pH8.2
  • the concentrations of these dilution buffers are indicated as final concentrations.
  • the initial concentration was proportionally higher and dependent on the dilution rate.
  • the initial concentration was proportionally higher and dependent on the dilution rate.
  • HEPES finds use in exchange for Tris.
  • the equipment used was a Biomek FX Robot (Beckman), and an incubator/shaker (Innova, type 4230; New Brunswick). The
  • PIPES buffer was adjusted to pH 5.8 with 4 N HCl (final concentration of 55 mM).
  • the Tris buffer was adjusted to pH 8.2 with 4 N HCl (final concentration of 25 mM).
  • the 50 mM citrate/25 mM Tris buffer was adjusted to pH 8.2 with 4 N NaOH.
  • the HEPES buffer was adjusted to pH 8.2 with 4 N NaOH (final concentration of 25 mM).
  • the 50 raM citrate/25 mM HEPES buffer was adjusted to pH 8.2 with 4 N NaOH.
  • the protease concentration of the wild-type NprE controls for each plate were determined with the TCA assay. In this method, 25 ⁇ l filtered culture broth were added to 200 ⁇ l 16.875% (w/v) TCA. After incubation for 10 to 15 minutes at ambient temperature, the light scattering/absorbance at 405 nm was determined. The protein concentration was determined by using a calibration line, constructed with purified NprE.
  • the dilution rate of the filtered culture broth was determined using the TCA assay, as described above.
  • the filtered culture broth was diluted with dilution buffer 2.
  • the MTP was covered with tape, shaken for a few seconds and placed in the incubator at 25°C for 60 minutes at 200 rpm. After incubation, 20 ⁇ l of the mixture were taken from each well and transferred into a new MTP, containing 180 ⁇ l 1 % DMC preheated substrate solution (the substrate was preheated at 25°C). The MTP was placed directly in the incubator/shaker and incubated at
  • the residual protease activity was determined using the dimethylcasein hydrolysis assay, described below.
  • the filtered culture broth was diluted with dilution buffer 1. Immediately, 20 ⁇ l of the mixture were taken from each well and transferred into a new MTP, containing 180 ⁇ l of preheated 1% DMC substrate solution (the substrate was preheated at 25°C). The MTP was placed directly in the incubator/shaker and incubated for 25°C for 30 minutes at 200 rpm agitation. The initial protease activity as determined with TNBS, using the dimethylcasein hydrolysis assay, described below. All residual activity values (determined with the dimethylcasein hydrolysis assay) were calculated using the following equation.
  • PIPES buffer (free acid) Sigma P-1851; 15.1 g dissolved in about 960 ml water; pH adjusted to 6.0 with 4N NaOH, 1 ml of 5% TWEENO-80 added and the volume brought up to 1000 ml. Final concentration of PIPES and TWEEN®-80: 50 mM and 0.005% respectively.
  • Reagent B 35.2 g NaH 2 PO 4 . IH 2 O (Merck 6346) and 0.6 g Na 2 S ⁇ 3 (Merck 6657) dissolved together to a final volume of 1000 ml.
  • the substrate 4 g dimethylcasein was dissolved in 400 ml PIPES buffer. The filtered culture supernatants were diluted with PIPES buffer. Then, 10 ⁇ l of each diluted supernatant were added to 200 ⁇ l substrate in the wells of a MTP. The MTP was covered with tape, shaken for a few seconds and placed in an oven at 25 0 C for 30 minutes without agitation. About 15 minutes before removal of the 1 st plate from the oven, the TNBS reagent was prepared by mixing 1 ml TNBS solution per 50 ml of Reagent A. MTPs were filled with 60 ⁇ l TNBS Reagent A per well.
  • the incubated plates were shaken for a few seconds, after which 10 ⁇ l was transferred to the MTPs with TNBS Reagent A.
  • the plates were covered with tape and shaken for 20 minutes in a bench shaker (BMG Thermostar) at room temperature and 500 rpm.
  • 200 ⁇ l Reagent B was added to the wells, mixed for 1 minute on a shaker, and the absorbance at 405 nm was determined using a MTP reader.
  • the obtained absorbance value was corrected for the blank value (Le., substrate without enzyme).
  • the resulting absorbance was a measure of the hydrolytic activity.
  • the (arbitrary) specific activity of a sample was calculated by dividing the absorbance and the determined protein concentration.
  • NprE and variants were measured after an incubation step in the presence of 25% TIDE® compact detergent.
  • the initial and residual activity was determined using the AGLA-assay described below.
  • the equipment used was a Biomek FX Robot (Beckman), a fluorescence meter (FLUOstar Optima; BMG), an incubator/shaker (iEMS; Thermoelectron) and an incubator/shaker (Innova; New Brunswick (type 4230)); the MTPs were from Costar (type 9017) and from Greiner (black plates, type 655076).
  • TIDE®-compact detergent With and without DTPA TIDE®-conipact detergent solution 125 g TIDE®-compact dissolved in a mixture of 50 of 50 mM HEPES pH 8.2 and 275 ml water; concentration of TIDE® was 27.7%, after dilution with supernatant 25 % MES dilution buffer 52.6 mM MES/NaOH, 2.6 mM CaCI 2 , 0.005%
  • AGLA substrate BaChem cat no. H-6675 or American Peptide Company, cat no. 81-0-31
  • AGLA substrate solution 451 mg of AGLA dissolved in 16 ml N,N- dimethylformamide; this solution was poured into 304 ml of MES-buffer
  • 20 ⁇ l filtered culture broth was diluted with 180 ⁇ l TIDE®-compact detergent solution without DTPA and after premising in the iEMS shaker for 5 minutes, were incubated further in the Innova shaker. The plate was incubated for a total of 60 minutes at 32°C, at 200 rpm.
  • 20 ul filtered culture broth were diluted with 180 ul TIDE®- compact detergent solution with DTPA and after premixing in the iEMS shaker for 5 minutes, were incubated further in the Innova shaker. The plate was incubated for a total of 40 minutes at 20 0 C, at 200 rpm.
  • Free 2-aminobenzoyl-L- alanylglycine (Abz-AG) in solution has a fluorescence emission maximum at 415 nm with an excitation maximum of 340 nm. Fluorescence of Abz-AG is quenched by nitrobenzylamide in the intact Abz-AGLA-Nba molecule.
  • a microplate mixer with temperature control (e.g., Eppendorf Thermomixer) was required for reproducible assay results.
  • the assay solutions were incubated to desired temperature (e.g., 25 0 C) in the microplate mixer prior to enzyme addition. Enzyme solutions were added to the plate in the mixer, mixed vigorously and rapidly transferred to the plate reader.
  • a spectrofluorometer with capability of continuous data recording, linear regression analysis, and with temperature control was required (e.g., SpectraMax M5, Gemini EM, Molecular Devices).
  • the reader was always maintained at the desired temperature (e.g., 25°C).
  • the reader was set for top-read fluorescence detection and the excitation was set to 350 nm and emission to 415 nm without the use of a cut-off filter.
  • the PMT was set to medium sensitivity and 5 readings per well. Autocalibration was turned on, but only to calibrate before the first reading.
  • the assay was measured for 3 minutes with the reading interval minimized according to the number of wells selected to be monitored.
  • the reader was set to calculate the rate of milli-RFU/min (thousandths of relative fluorescence units per minute).
  • the number of readings used to calculate the rate (Vmax points) was set to the number equivalent to 2 minutes, as determined by the reading interval (e.g., a reading every 10 seconds would use 12 points to calculate the rate).
  • the max RFU was set to 50,000.
  • MES acid (10.28 g) and 292 mg anhydrous CaCl 2 were dissolved in approximately 90OmL purified water.
  • the solution was titrated with NaOH to pH 6.5 (at 25°C or with temperature adjustment pH probe).
  • the pH-adjusted buffer was made up to IL total volume.
  • the final solution was filtered through a 0.22 ⁇ m sterile filter and kept at room temperature.
  • the enzyme stock solutions were diluted with enzyme dilution buffer to a concentration of approximately 1 ppm (1 ug/mL).
  • MULTTFECT® neutral protease wild- type NprE was diluted to concentrations below 6 ppm (6 ug/mL).
  • Serial dilutions were preferred. Solutions were stable at room temperature for 1 hour, but for longer term storage, the solutions were maintained on ice.
  • a 200 uL aliquot of assay solution were placed in the wells of a 96-well microplate.
  • the plate was incubated for 10 min at 25°C in a temperature controlled microplate mixer, shielded from light.
  • the assay was initiated by transferring 10 uL of the working enzyme solutions from the stock microplate to the assay microplate in the mixer.
  • 96-well pipetting head finds use, or an 8-well multi-channel pipet was used to transfer from the left-most column first.
  • the solutions were vigorously mixed for 15 seconds (900rpm in Eppendorf Thermomixer).
  • the assay microplate was transferred to the microplate spectrofluorometer and recording of fluorescence measurements at excitation of 350 nm and emission of 415 nm were begun.
  • the spectrofluorometer software calculated the reaction rates of the increase in fluorescence for each well to a linearly regressed line of milli-RFU / min.
  • a second plate was placed in the microplate mixer for temperature equilibration while the first plate was being read.
  • the rate initial velocities were linear with respect to product concentration (i.e., liberated 2-aminobenzoyl fluorescence) up to 0.3 mM product, which corresponded to approximately 50,000 RFU in a solution starting at 2.3mM Abz-AGLA-Nba with background fluorescence of approximately 22,000 RFU. Abz-AGLA-Nba was dissolved in DMF and was been used the day it was prepared.
  • the enzymes levels are expressed by pure . enzyme by weight of the total composition and unless otherwise specified, the detergent ingredients are expressed by weight of the total compositions.
  • the abbreviated component identifications therein have the following meanings:
  • NaC16-17HSAS Sodium C ⁇ 17 highly soluble alkyl sulfate
  • TAS Sodium tallow alkyl sulphate.
  • CxyAS Sodium C 1x - C 1 ⁇ alkyl sulfate.
  • CxyEz Cj x - C 1 ⁇ predominantly linear primary alcohol condensed with an average of z moles of ethylene oxide.
  • CxyAEzS C 1x - C ⁇ y sodium alkyl sulfate condensed with an average of z moles of ethylene oxide. Added molecule name in the examples.
  • Nonionic Mixed ethoxylated/propoxylated fatty alcohol e.g. Plurafac LF404 being an alcohol with an average degree of ethoxylation of 3.8 and an average degree of propoxylation of 4.5.
  • Zeolite A Hydrated Aluminosilicate of formula Na 12 (AlO 2 SiO 2 ) 12 . 27H 2 O SKS-6 Crystalline layered silicate of formula ⁇ -Na2Si2U5
  • Polycarboxylate Copolymer comprising mixture of carboxylated monomers such as acrylate, maleate and methyacrylate with a MW ranging between
  • BBl 3-(3,4-Dihydroisoquinolinium)propane sulfonate BB2 l-(3,4-dihydroisoquinolinium)-decane-2-sulfate
  • PBl Sodium perborate monohydrate.
  • PB4 Sodium perborate tetrahydrate of nominal formula NaB ⁇ 3.4H2 ⁇ .
  • TAED Tetraacetyl ethylene diamine. NOBS Nonanoyloxybenzene sulfonate in the form of the sodium salt.
  • DTPA Diethylene triamine pentaacetic acid.
  • HEDP 1,1 -hydroxy ethane diphosphonic acid.
  • EDDS Ethylenediamine-N,N'-disuccinic acid, (S,S) isomer in the form of its sodium salt Diamine Dimethyl aminopropyl amine; 1,6-hezane diamine; 1,3-propane diamine; 2-methyl-l,5-pentane diamine; 1,3-pentanediamine; 1- methyl-diaminopropane.
  • PAAC Pentaamine acetate cobalt(IH) salt Paraffin Paraffin oil sold under the tradename Winog 70 by Wintershall. Paraffin Sulfonate A Paraffin oil or wax in which some of the hydrogen atoms have been replaced by sulfonate groups.
  • Aldose oxidase Oxidase enzyme sold under the tradename Aldose Oxidase by
  • nprE The recombinant form of neutral metalloprotease expressed in Bacillus subtilis.
  • NATALASE ® TERMAMYL®, FUNGAMY1® and DURAMYLTM, all available from Novozymes A/S.
  • Lipase Lipolytic enzyme sold under the tradename LIPOLASE®, L1POLASE® Ultra by Novozymes A/S and LipomaxTM by Gist- Brocades.
  • PVPVI Copolymer of vinylimidazole and vinylpyrrolidone with an average molecular weight of 20,000.
  • Brightener 1 Disodium 4,4'-bis(2-sulphostyryl)biphenyl. Silicone antifoam Polydimethylsiloxane foam controller with siloxane-oxyalkylene copolymer as dispersing agent with a ratio of said foam controller to said dispersing agent of 10:1 to 100:1.
  • PEG X Polyethylene glycol, of a molecular weight of x.
  • PVP K60 Vinylpyrrolidone homopolymer (average MW 160,000)
  • Jeffamine ® ED-2001 Capped polyethylene glycol from Huntsman Isachem ® AS A branched alcohol alkyl sulphate from Enichem MME PEG (2000) Monomethyl ether polyethylene glycol (MW 2000) from Fluka
  • Types Kaolinite, montmorillonite, atapulgite, illite, bentonite, halloysite. pH Measured as a 1% solution in distilled water at 20 0 C.
  • the gene-encoding neutral metalloprotease was cloned from B. amyloliquefaciens using well-established methods in this art.
  • the non-exempt (Le., the strain carries extrageneric DNA (besides the chloramphenicol selectable marker which is allowed in an exempt strain), specifically the plasmid pJM102 sequences) strain BC91504 (aprE/nprE-pJM!02 in BG3594::comK) carries the B. subtilis aprE promoter and signal sequence fused to B. amyloliquefaciens nprE propeptide/mature gene in integrating plasmid pJM102.
  • SEQ ID NO:1 The following two sequences (SEQ ID NO:1 and SEQ ID NO:2) of B. subtilis and B. amyloliquefaciens were generated via PCR with the oligonucleotide primers corresponding to the underlined sequences.
  • B subtilis chromosomal Ec ⁇ RI restriction site GAATTC
  • GATC aprE start codon
  • B. amyloliquefaciens nprE stop codon are shown in the following sequences in boldface type as well as a synthetically introduced HmdIH restriction site (AAGCTT) designed into primer # 4.
  • the B. amyloliquefaciens aprE 5' upstream sequence, promoter and signal sequence coding region are shown in the following sequence (SEQ ID NO:1).
  • Primer 1 (apr-f; GAGCTGGGTAAAGCCTATGAAT; SEQ ID NO:5) is shown underlined, at the beginning of the sequence, while the aprE portion of primers 2 and 3 (npr-f and npr-r; GTTCAGCAACATGTCTGCGCAGGCT; SEQ ID NO:6) are shown double underlined at the end of the sequence.
  • the sequence of the B. amyloliquefaciens propeptide and mature nprE coding sequence and transcription terminator are provided in the sequence below.
  • the nprE portion of primers 2 and 3 is underlined (GCTGAGAATCCTCAGCTTAAAGAAAACCTG; SEQ ID NO:7), while the npr-r portion of primer 4
  • amino acid sequence of the full-length NprE (pre-, pro- and mature sequence) is provided below:
  • NprE sequence finds use in the present invention.
  • VRSKKLWISLLFALTLIFTMAFSNMSAQAAENPQLKENLTNFVPKHSLVQSELPSVSD KAIKQYLKQNGKVFKGNPSERLKLIDQTTDDLGYKHFRYVPVVNGVPVKDSQV ⁇ HV DKSNNVYAINGELNNDVSAKTANSKKLSANQALDHAYKAIGKSPEAVSNGTVANKN KAELKAAATKDGKYRLA YDVTIRY1EPEPANWEVTVDAETGKILKKQNK VEHAATT GTGTTLKGKTVSLNISSESGKYVLRDLSKPTGTQ ⁇ TYDLQNREYNLPGTLVSSTTNQF TTSSQRAAVD AHYNLGKVYDYFYQKFNRNSYDNKGGKWSSVHYGSRYNNAAWIG DQMIYGDGDGSFFSPLSGSMDVTAHEMTHGVTQETANLNYENQPGALNESFSDVFG Y
  • Primers 2 and 3 are reverse complements of each other and correspond to either non- coding (#2) or coding (#3) strands of the chromosomal DNAs. For the coding strand, they correspond to the last 25 base pairs of the aprE signal sequence and the first 30 base pairs of the nprE propeptide.
  • Primer #4 is the reverse complement to the underlined sequence, comprising 24 base pairs 3' of the nprE stop codon and terminator with an introduced HircdHI site preceded by six dCTP residues, to provide a so-called "clamp,” allowing more efficient cleavage with HmdIH restriction endonuclease, as some restriction enzymes cleave inefficiently if their recognition sequence is located at the very ends of DNA fragments.
  • the two PCR fragments were generated with the following protocol and reagents (except DNA template and oligonucleotide primers) from Applied Biosystems' rTTH DNA Polymerase, XL Kit:
  • the integration plasmid pJM102 was also digested with EcoRI and Hmdi ⁇ , and the linear plasmid was then gel purified and ligated by standard techniques to the digested apr/npr fusion fragment. This ligation reaction was subsequently used to directly transform a xylose-induced B. subtilis strain.
  • the two fragments were generated by PCR with primers 1 and 2 from wild-type B. subtilis chromosomal DNA, and with primers 3 and 4 from chromosomal DNA from a B. amyloliquefaciens strain.
  • This fragment was again purified as descried above, followed by cutting with EcoRI and Hind ⁇ I as in the same digestion of the integrating plasmid pJM102 and subsequent ligation of the fusion fragment to the plasmid.
  • Several transformants had the fusion sequenced from the chromosome to verify the absence of any PCR-derived mutations.
  • One of these was then amplified stepwise from 5 - 25 mg/mL chloramphenicol, the selectable marker on pJM102, to co-amplify the linked expression cassette.
  • the selected sequence verified transformant was obtained by selection for pJM102's chloramphenicol (CMP) resistance marker on LB/agar plates containing 5 mg/ml CMP. This was then inoculated into LB broth at 10 mg/ml CMP overnight at 37°C, with shaking at 250 RPM. This culture was then streaked onto LB/agar plates with 10 mg/ml CMP to isolate single colonies. One colony was then inoculated into LB broth at 25 mg/ml CMP overnight at 37°C, with shaking at 250 RPM. This culture was then streaked to LB/agar plates with 25 mg/ml CMP to isolate single colonies. These colonies were harvested and stored in glycerol at -70 0 C until use, as known in the art.
  • CMP chloramphenicol
  • the DNA encoding the neutral metal! oprotease was cloned into an amylase- deleted host.
  • the inducible comK for competence development was inserted in the middle of the amylase locus, making the strain "amyV
  • the secretion of the expressed protein was ensured by insertion of the nucleotides encoding the signal sequence prior to the coding sequence of the gene.
  • the recombinant Bacillus subtilis produced as described in Example 1 was cultivated by conventional batch fermentation in a nutrient medium as described below.
  • One glycerol vial (prepared as described in Example 1) of B. subtilis culture containing the B. amyloliquefaciens neutral metalloprotease was used to inoculate 600 ml of SBGl % medium containing 200 mg/L chloramphenicol.
  • the cultures were grown for 48 hours at 37°C, after which time, the culture fluid was recovered by centrifugation at 12,000 rpm, as known in the
  • This Example describes the methods used to purify the neutral metalloprotease expressed by the organisms described in Example 2. After 36 hours of incubation at 37 0 C, the fermentation broth was recovered and centrifuged at 12000 rpm (SORV ALL® centrifuge model RC5B). The secreted neutral metalloproteases were isolated from the culture fluid and concentrated approximately 10-fold using an Amicon filter system 8400 with a BES (polyethersulfone) 1OkDa cutoff.
  • BES polyethersulfone
  • the concentrated supernatant was dialyzed overnight at 4 0 C against 25 mM MES buffer, pH 5.4, containing 10 mM NaCl.
  • the dialysate was then loaded onto a cation- exchange column Porous HS20 (total volume ⁇ 83 mL; binding capacity ⁇ 4.5g protein/mL column; Waters) as described below.
  • the column was pre-equilibrated with 25 mM MES buffer, pH 5.4, containing 10 mM NaCl. Then, approximately 200-300 mL of sample was loaded onto the column.
  • the bound protein was eluted using a pH gradient from 5.4 to 6.2 ⁇ over 10-column volumes of MES buffer. Elution of the protein was between pH 5.82 and .
  • the purified protein assessed using a 10 % (w/v) NUPAGE® SDS-PAGE, was determined to homogenous, with greater than 95 % purity. Typically, less than 1% of the purified preparations showed serine protease activity when assessed using the standard protease assay with the small substrate, suc-p-AAPF-pNA (N-succinyl-L-Ala-L-Ala-L-Pro-L- Phe-p-nitroanilide) (Sigma) .
  • suc-p-AAPF-pNA N-succinyl-L-Ala-L-Ala-L-Pro-L- Phe-p-nitroanilide
  • This assay was performed in microtiter plate format (96 well) using a 100 mM Tris-HCl buffer, pH 8.5, containing 10 mM CaCl 2 and 0.005 % TWEEN®- 80.
  • the substrate (p-AAPF NA) was prepared by making a 160 mM stock in
  • diluted protease solution (dimethylsulfoxide) (100 mg/ml) and diluting this stock 100-fold with the Tris-HCl buffer containing CaCl 2 and 0.005 % TWEEN®-80. Then, 10 uL of diluted protease solution (dilutions were prepared using 100 mM Tris-HCl buffer, pH 8.5, containing 10 mM CaCl 2 and 0.005 % TWEEN-80) was added to 190 uL lmg/ml p-AAPF solution. The assay was mixed for 5 minutes and the kinetic change at 410 nm was read over 2 to 5 minutes. The slope of the response was measured and used as an indication of the amount of serine protease, activity. The protein was formulated for storage using 25 mM MES buffer, pH 5.8, containing 1 mM zinc chloride, 4 mM calcium chloride, and 40 % propylene glycol.
  • the buffer and/or detergent base contained zinc ions, calcium ions or a combination thereof.
  • the concentration of both the zinc and calcium ions was varied from 0 to 25 mM.
  • the azo-casein endpoint assay was used to assess the amount of proteolysis that occurred under certain conditions.
  • 75 uL of enzyme were incubated with excess calcium or zinc or both ions added to 250 ⁇ l of 1 % (w/v) azo-casein (Sigma).
  • the reaction proceeded at 30 0 C for 15 minutes, after which 10 % (w/v) trichloroacetic acid was added to stop the reaction.
  • the precipitated protein and the unreacted azo-casein were removed by centrifugation for 10 minutes at 14 000 ipm.
  • the color of the azo-group was developed by addition of 750 ⁇ L 1 M sodium hydroxide. The development of the color proceeded for 5 minutes, after which the reaction was stopped and the absorbance was measured at 440 nm.
  • Succinylated-casein and TNBSA assay The activity of the neutral metalloprotease was determined using the QuantiCleave Protease Assay KitTM (Pierce). This assay is based on the digestion of succinylated-casein by the enzyme. The primary amino groups formed are then reacted with trinitrobenzene sulfonic acid (TNBSA) and form a colored complex that has maximum absorbance at 450 nm. The assay is performed in 96-well microtiter format. The assay requires a 15-minute incubation with the succinylated casein and a 15-minute reaction with the TNBSA. During both incubations, the samples are placed on a shaker.
  • TNBSA trinitrobenzene sulfonic acid
  • TPCK-trypsin (Pierce) is the general standard used for overall protease activity determinations. However, optimum conditions for activity for specific proteases require the use of the protease of interest. In the case of the assays performed in these experiments, both trypsin and the protease of interest were used, in order to calibrate the assay. The accuracy of the assay requires that the standard dilutions made of 0.5 mg/mL trypsin always result in absorbance values (at 450 nm) below 0.5.
  • protease assays were typically performed in duplicate. In most experiments to determine stability measurements, the protein and detergent were diluted using the above- mentioned buffer by 1:1000, although in some experiments dilutions of were also 1:500 or 1: 200, in order to obtain readings where the absorbance of the blanks was less than 0.5.
  • the microtiter spectrophotometer used in these experiments was a SpectraMax250® (Molecular Devices) and all assays were conducted in medium protein-binding 96-well plates (Corning).
  • the pH optimum of the activity for 0,36 mg/mL of formulated nprE was also determined.
  • the pH optimum for formulated nprE was determined to be between 5.5 and 6.0.
  • HDL high density liquid detergent
  • the stability test was performed in a mini-storage manner.
  • the conditions to be varied and the various concentrations of calcium and zinc chloride salts to be added were assessed using a matrix designed using the FusionProTM (S-Matrix) software.
  • the following table summarizes the conditions tested to ascertain the long-term storage stability of neutral metalloprotease from B. amyloliquefaciens.
  • TIDE® 2005 was dosed with 0:36 mg enzyme/mL.
  • Formulated culture fluid and purified recombinant metalloprotease were incubated in the TIDE® 2005 base at 32 0 C over a period of approximately 4 weeks.
  • the storage stability of the metalloprotease in detergent was compared to the stability of the neutral metalloprotease in 50 mM MES buffer, pH 5.8.
  • the samples Prior to testing, the samples were diluted 5 in 1000 using assay buffer (50 mM borate buffer, pH 8.5). The residual activity was determined and compared relative to the neutral metalloprotease in assay buffer. All measurements were determined in duplicate. Each sample was tested in parallel with appropriate control blanks (i.e., the detergent, buffer and any necessary additives being tested). The samples were then assayed as described in the instructions provided with the QuantiCleaveTM Protease Assay Kit (Pierce).
  • assay buffer 50 mM borate buffer, pH 8.5
  • thermolysin which displays 55 % amino acid sequence identity with neutral metalloprotease from B. amyloliquefaciens (sequence alignment performed using CLUSTAL W, v. 1.82), it has been clearly shown that zinc ions are essential for activity, whereas the calcium ions and engineering of the calcium binding sites have been shown to play a stabilization role (See e.g., Mansfield., et al., J. Biol. Chem., 272:11152-11156 [1997]; and Van den Berg et al., Biotechnol. Appl. Biochem., 30:35-40 [1999]).
  • NprE Protease Production in B. subtilis using the nprE Expression Vector pUBnprE In this Example, experiments conducted to produce NprE protease in B. subtilis, in particular, the methods used in the transformation of plasmid pUBnprE into B. subtilis are described. Transformation was performed as known in the art (See e.g., WO 02/14490, incorporated herein by reference).
  • the DNA sequence (nprE leader, nprE pro and nprE mature DNA sequence from B. amyloliquefaciens) provided below, encodes the NprE precursor protein:
  • the pUBnprE expression vector was constructed by amplifying the nprE gene from the chromosomal DNA of B. amyloliquefaciens by PCR using two specific primers:
  • Oligo AB 1740 CTGCAGGAATTCAGATCTTAACATTTTTCCCCTATCATTTTTCCCG (SEQ ID NO: 19) Oligo AB1741:
  • the PCR mixture contained 10 ⁇ l 5x buffer (Finnzymes Phusion), l ⁇ l 1OmM dNTP's, 1.5 ⁇ l DMSO, l ⁇ l of each primer, l ⁇ l Finnzymes Phusion DNA polymerase, l ⁇ l chromosomal DNA solution 50ng/ ⁇ l, 34.5 ⁇ l MiIIiQ water.
  • the following protocol was used:
  • the multicopy Bacillus vector pUBl 10 (See e.g., Gryczan, J. Bacterid., 134:318-329 [1978]) was digested with BamHL.
  • the PCR fragment x BgIJl x Bell was then ligated in the pUBHO x Bam ⁇ I vector to form pUBnprE expression vector (See, Figure 14).
  • pUBnprE was transformed to a B.
  • subtilis ( ⁇ aprE, ⁇ nprE, oppA, AspoIIE, degUHy32, AamyE::(xylR,pxylA-comK) strain. Transformation into .B. subtilis was performed as described in WO 02/14490, incorporated herein by reference. Selective growth of B. subtilis transformants harboring the pUBnprE vector was performed in shake flasks containing 25 ml MBD medium (a MOPS based defined medium), with 20 mg/L neomycin. MBD medium was made essentially as known in the art (See, Neidhardt et ah, J.
  • the micronutrients were made up as a 100 X stock containing in one liter, 400 mg FeSO 4 .7H 2 0, 100 mg MnSO 4 .H 2 0, 100 mg ZnSO 4 .7H 2 O, 50 mg CuCl 2 .2H 2 0, 100 mg CoCl 2 .6H 2 0, 100 mg NaMo0 4 .2H 2 0, 100 mg Na 2 B 4 O 7 JOH 2 O, 10 ml of IM CaCl 2 , and 10 ml of 0.5 M sodium citrate.
  • the culture was incubated for three days at 37°C in an incubator/shaker (Infors). This culture resulted in the production of secreted NprE protease with proteolytic activity as demonstrated by protease assays.
  • Gel analysis was performed using NuPage Novex 10% Bis-Tris gels (Invitrogen, Cat.No.
  • nprE SELs methods used in the construction of nprE SELs are described.
  • the pUBnprE vector containing the nprE expression cassette described above, served as template DNA. This vector contains a unique BgM restriction site, which was utilized in the site evaluation library construction.
  • the pUBnprE expression vector, primers, synthesized at Invitrogen (desalted, 50 nmol scale) were used to generate the libraries. The sequences of the primers are provided in Table 8-1.
  • nprE site evaluation library To construct a nprE site evaluation library, three PCR reactions were performed, including two mutagenesis PCRs to introduce the mutated codon of interest in the mature nprE DNA sequence and a third PCR used to fuse the two mutagenesis PCRs in order to construct the pUBnprE expression vector including the desired mutated codon in the mature nprE sequence.
  • the method of mutagenesis was based on the codon-specific mutation approach, in which the creation of all possible mutations at a time in a specific DNA triplet was performed using a forward and reverse oligonucleotide primer with a length of 25 to 45 nucleotides enclosing a specific designed triple DNA sequence NNS ((A,C,T or G), (A,C,T or G), (C or G)) that corresponded with the sequence of the codon to be mutated and guaranteed random incorporation of nucleotides at that specific nprE mature codon.
  • the number listed in the primer names corresponds with the specific nprE mature codon position.
  • Two additional primers used to construct the site evaluation libraries contained the BgIJl restriction site together with a part of the pUBnprE DNA sequence flanking the BgIJI restriction site. These primers were produced by Invitrogen (50nmole scale, desalted) and are listed in Table 8-1.
  • each site evaluation library started with two primary PCR amplifications using the pUB-Bglll-FW primer and a specific nprE reverse mutagenesis primer.
  • the pUB-Bgi ⁇ -RV primer and a specific nprE forward mutagenesis primer were used.
  • the PCR experiments result in two fragments of approximately 2 to 3 kB, which had about 30 nucleotide base overlap around the NPRE mature codon of interest. Fragments were fused in a third PCR reaction using these two aforementioned fragments and the forward and reverse BgIYL primers.
  • the fusion PCR reaction was carried out in the following solution:
  • the PCR fusion program was as follows: 30 seconds 98°C, 30x (10 seconds 98°C,
  • the amplified linear 6.5 Kb fragment was purified using the QiaquickPCR purification kit (Qiagen, Cat. no. 28106) and digested with BgM restriction enzyme to create cohesive ends on both sides of the fusion fragment:
  • B. subtilis (AaprE, AnprE, oppA, ⁇ spoIIE, degUHy32, AamyE::(xylR,pxylA-comK) strain. Transformation to B. subtilis was performed as described in WO 02/14490, incorporated herein by reference. For each library, 96 single colonies were picked and grown in MOPS media with neomycin and 1.25 g/L yeast extract for sequence analysis (BaseClear) and screening purposes. Each library included a maximum of 19 nprE site-specific variants.
  • the variants were produced by growing the B. subtilis SEL transformants in 96 well MTP at 37 0 C for 68 hours in MBD medium with 20 mg/L neomycin and 1.25 g/L yeast extract ⁇ See, above).
  • ⁇ G app -RT Ln ( Pvarian/Pparent )
  • P va ⁇ ant is the performance value for the variant
  • Pp aren t is the performance value for the parent enzyme under the same conditions.
  • the ratio P V ari_ nt ⁇ P p _ r e nt is defined as the performance index (Pi) for the property.
  • the ⁇ G app values were expected to behave in a similar fashion to actual ⁇ G values for data distributions and additivity.
  • ⁇ G represents the maximum amount of work that can be carried out by the variant compared to the parent enzyme
  • the quantity ⁇ G app generally underestimates the ⁇ G and may lead to results that appear synergistic in that the properties of two additive positions may be greater than the value predicted by adding their ⁇ G app values together.
  • nprE library fragments containing multiple mutations at multiple nprE mature DNA positions, were produced by GeneArt (Geneart). These 1.5 kB nprE library fragments were digested with DNA restriction enzymes Pvul and Aval, purified and ligated in the 5 kB pUB vector fragment (also digested with DNA restriction enzymes Pvul and Aval) by a ligase reaction using T4 DNA Ligase (Invitrogen ® Cat. no. 15224-017).
  • the library DNA (nprE library fragment mix ligated in pUB vector fragment) was amplified using the
  • TempliPhi kit (Amersham cat. #25-6400).
  • IuL of the ligation reaction mix was mixed with 5 ⁇ L of sample buffer from the TempliPhi kit and heated for 3 minutes at 95 °C to denature the DNA.
  • the reaction was placed on ice to cool for 2 minutes and then spun down briefly.
  • 5 ⁇ L of reaction buffer and 0.2 ⁇ L of phi29 polymerase from the TempliPhi kit were added, and the reactions were incubated at 30°C in an MJ Research PCR machine for 4 hours.
  • the ⁇ hi29 enzyme was heat inactivated in the reactions by incubation at 65°C for 10 min in the PCR machine.
  • 0.1 uL of the TempliPhi amplification reaction product was mixed with 500 ⁇ L of competent B. subtilis cells ( ⁇ aprE, ⁇ nprE, oppA, ⁇ spoIIE, degUHy32, ⁇ amyE::(xylR,pxylA-comK) followed by vigorous shaking at 37°C for 1 hour. Then, 100 and 500 ⁇ L were plated on HI-agar plates containing 20 mg/L neomycin and 0.5% skim milk. In general, transformation to B. subtilis was performed as described in WO 02/14490, incorporated herein by reference. B. subtilis nprE combinatorial libraries, constructed by this method are contemplated to contain wild type amino acids at one or more of the positions targeted for mutagenesis.
  • Example 8 alternative methods to generate nprE SELs are described.
  • the pUBnprE vector served as the template DNA source for the generation of nprE SELs.
  • the major difference between the two methods is that this method requires amplification of the entire vector using complementary site-directed mutagenic primers.
  • Bacillus strain containing the pUBnprE vector Bacillus strain containing the pUBnprE vector
  • Competent B. subtilis cells (AaprE, AnprE, oppA, AspoIIE, degUHy32, AamyE::(xylR,pxylA- comK)
  • a single colony of a Bacillus strain containing the pUBnprE vector was used to inoculate a 5ml LB + lOppm neomycin tube. This was the starter culture used in these methods. The culture was grown at 37°C, with shaking at 225 rpm for 6 hours. Then, 100 ml of fresh LB + lOppm neomycin were inoculated with ImI of the starter culture. This culture was grown overnight at 37°C, with shaking at 225 rpm.
  • the cell pellet was harvested by sufficient centrifugation to provide a cell pellet.
  • the cell pellet was resuspended in 10 ml Buffer Pl (Qiagen Plasmid Midi Kit). Then, lOul of Ready-Lyse Lysozyme was added to the resuspended cell pellet and incubated at 37°C for 30 min. Then, the Qiagen Plasmid Midi Kit protocol was continued (using 10ml of Buffer P2 and P3 to account for the increased volume of cell culture). After isolation of pUBnprE vector from Bacillus, the concentration of pUBnprE vector was quantitated.
  • the vector was then dam methylated using the dam Methylase Kit (New England Biolabs), using the methods set forth in the kit protocols, to methylate approximately 2 ug of pUBnprE vector per tube.
  • the Zymoclean Gel DNA recovery kit was used to purify and concentrate the dam- methylated pUBnprE vector.
  • the dam-methylated pUBnprE vector was quantitated and then diluted to a working concentration of 50ng/ul.
  • Complementary site-directed mutagenic primers (1 ul of each primer at lOuM) (See, Table 10-1), were used in a PCR reaction in the QuikChange Multi Site-Directed Mutagenesis Kit (Stratagene), following the manufacturer's protocol (e.g., IuI dam methylated pUBnprE vector (50ng/ul), IuI nprE site-directed Forward mutagenic primer (lOuM), IuI nprE site-directed Forward mutagenic primer (lOuM), 2.5ul
  • IuI dam methylated pUBnprE vector 50ng/ul
  • IuI nprE site-directed Forward mutagenic primer (lOuM)
  • IuI nprE site-directed Forward mutagenic primer (lOuM)
  • reaction mixture underwent Dpnl digest treatment (supplied with QuikChange Multi Site-Directed Mutagenesis Kit) to digest parental pUBnprE vector, using the manufacturer's protocol (i.e., 1.5ul Dpnl restriction enzyme was added to each tube and incubated at 37 0 C for 3 hours; 2ul of .Dprcl-digested PCR reaction was then analyzed on a 1.2% E-gel for each nprE SEL to ensure PCR reaction worked and that parental template was degraded).
  • Dpnl digest treatment supplied with QuikChange Multi Site-Directed Mutagenesis Kit
  • TempliPhi rolling circle amplification was then used to generate large amounts of DNA for increasing library size of each nprE SEL, using the manufacturer's protocol (i.e., IuI Dpnl treated QuikChange Multi Site-Directed Mutagenesis PCR, 5ul TempliPhi Sample Buffer, 5ul TempliPhi Reaction Buffer, and 0.2ul TempliPhi Enzume Mix, for an ⁇ 1 IuI total reaction; incubated at 30 0 C for 3 hours; the TempliPhi reaction was diluted by adding 200ul distilled, autoclaved water and briefly vortexed. Then, 1.5ul of diluted TempliPhi material was transformed into competent B.
  • the manufacturer's protocol i.e., IuI Dpnl treated QuikChange Multi Site-Directed Mutagenesis PCR, 5ul TempliPhi Sample Buffer, 5ul TempliPhi Reaction Buffer,
  • subtilis cells, and nprE SELs were selected for using LA + lOppm Neomycin + 1.6% skim milk plates.
  • Table 10-1 provides the names, sequences and SEQ ID NOS for the primers used in these experiments. All of the primers were synthesized by Integrated DNA Technologies, on lOOnmole scale, 5'-phosphorylated, and PAGE purified.
  • nprE-A273F CCGTCATCAACTTTTAAAGATGCAAAANNSGCTTTGATTCAATCTGCGCGG (SEQ ID NOtIOl)
  • nprE-L282F GATTCAATCTGCGCGGGACNNSTACGGCTCTCAAGATGCTGC (SEQ ID NO-.102)
  • nprE-S285F CGCGGGACCTTTACGGCNNSCAAGATGCTGCAAGCGTAG
  • nprE-A289F CCTTTACGGCTCTCAAGATGCTNNSAGCGTAGAAGCTGCCTGGAATG
  • nprE-A293F CTCAAGATGCTGCAAGCGTAGAANNSGCCTGGAATGCAGTCGGATTG SEQ ID NO: 105
  • GCTTTCAGAAGAAATATTTAATGAGACCGTTTTSNNTTTAAGAGTCGTACCTGTTCCGG SEQ ID nprE-G12R NO: 112
  • nprE-Q45R GGCAGGTTATACTCGCGGTTSNNCAGATCGTACGTAATAATTTGTGTTCCG SEQ ID NO: 113
  • nprE-Y49R GGATACGAGTGTGCCCGGCAGGTTSNNCTCGCGGTTTTGCAGATCGTAC SEQ ID NO: 114)
  • nprE-N50R CTGGATACGAGTGTGCCCGGCAGSNNATACTCGCGGTTTTGCAGATCGTAC SEQ ID NO: 115
  • nprE-T65R CAACGGCAGCGCGCTGAGAAGASNNTGTAAACTGGTTTGTGGTGCTGG SEQ ID NO-.116
  • nprE-D119R GTCGCCGTCACCGTAAATCATTTGSNNGCCGATCCAGGCTGCGTTATTGTATCTGC
  • CACGCCGCCGTAGTCGCCSNNATCAGTGTTCGGAAGGTTTTTGTAATTTTTGAAATTATCAGGCTG nprE-A221R (SEQ ID NO: 169) n ⁇ rE-G222R GTATGCACGCCGCCGTAGTCSNNGGCATCAGTGTTCGGAAGG (SEQ ID NO:170) n ⁇ rE-Q286R CAGCTTCTACGCTTGCAGCATCSNNAGAGCCGTAAAGGTCCCG (SEQ ID N0-.171) nprE-A297R CCGGTCTCTTTTCTTGTTTACAATCCGACSNNATTCCAGGCAGCTTCTACGC (SEQ ID NO:172) EXAMPLE 11
  • nprE Homologues In this Example, experiments conducted to identify npr homologues are described. In particular, in this Example, experiments were conducted to clone neutral protease (npr) homologs from different and closely related Bacillus species. The different species were chosen in order to explore the diversity and properties from which these different species are isolated.
  • Figure 3 provides a sequence alignment of these homologs (SEQ ID NOS:173-181) and Figure 4 (SEQ ID NOS:182-191) provides another sequence alignment of various other homologs.
  • B. subtilis competent cells ((AaprE, ⁇ nprE, oppA, AspoIIE, degUHy32, AamyE::(xylR,pxylA- comK)
  • FIG. 15 provides a schematic, illustrating the amplification of the individual DNA fragments.
  • PCR Splice Overlap Extension (SOE) reaction was used to join the 2 separate DNA fragments together.
  • the following reagents were combined: IuI aprE promoter DNA fragment, IuI B. subtilis nprE gene + Terminator fragment, IuI Primer EL- 689 (25uM), IuI Primer EL-695 (25uM), 5ul 1Ox PfuUltra II Fusion HS DNA polymerase buffer, IuI dNTP (1OmM), IuI PfuUltra H Fusion HS DNA polymerase, and 39ul distilled, autoclaved water to provide a total reaction volume of 50 ul.
  • the PCR cycles were: 95°C for 2 minutes (1 st cycle only), followed by 28 cycles of 95°C for 30 seconds, 54°C for 30 seconds, and 72°C for 0:45 seconds.
  • the PCR fusion fragment of aprE promoter-B. subtilis nprE gene + Terminator was digested with Mfel and Banii ⁇ l restriction endonucleases.
  • the pJHT vector was digested with £c ⁇ RI and Bam ⁇ I restriction endonucleases.
  • the restriction endonuclease digested aprE promoter-!?, subtilis nprE gene + Terminator DNA fragment was then ligated with the restriction endonuclease digested pJHT vector.
  • the ligation mixture was then transformed into TOPlO chemically competent E. coli cells for selection on LA + 50ppm carbenicillin.
  • Figure 17 provides a schematic diagram of the amplification of the individual DNA fragments.
  • PCR Splice Overlap Extension (SOE) reaction was used to join the three separate DNA fragments together.
  • the following reagents were combined: IuI aprE promoter DNA fragment, IuI B. subtilis nprB gene + Terminator fragment, IuI Terminator DNA fragment, IuI Primer EL-689 (25uM), IuI Primer EL-700 (25uM), 5ul 1Ox PfuUltra H Fusion HS DNA polymerase buffer, IuI dNTP (1OmM), IuI PfuUltra II Fusion HS DNA Polymerase, and 38ul distilled, autoclaved water, for a 50 ul total reaction volume.
  • the PCR cycles were: 95°C for 2 minutes (1 st cycle only), followed by 28 cycles of 95°C for 30 seconds, 54°C for 30 seconds, and 72°C for 0:45 seconds.
  • the PCR fusion fragment of aprE promoter-!?, subtilis nprB gene + Terminator was digested with Mfel and Sph ⁇ restriction endonucleases.
  • the pJHT vector was digested with Ec ⁇ Kl and Sph ⁇ restriction endonucleases.
  • subtilis nprB gene + Terminator DNA fragment was then ligated with the restriction endonuclease digested pJHT vector.
  • the ligation mixture was then transformed into TOPlO chemically competent E. coli cells for selection on LA + 50ppm carbenicillin.
  • PCR Splice Overlap Extension (SOE) reaction was used to join the 2 separate DNA fragments together.
  • the following reagents were combined: IuI aprE promoter DNA fragment, IuI B. stearothermophilus nprT gene fragment, IuI Primer EL-755 (25uM), IuI Primer EL-735 (25uM), 5ul 1Ox PfuUltra II Fusion HS DNA Polymerase buffer, IuI dNTP (1OmM), IuI PfuUltra ⁇ Fusion HS DNA Polymerase, and 39ul distilled, autoclaved water, to provide a total reaction volume of 50 ul.
  • the PCR cycles were: 95°C for 2 minutes (1 st cycle only), followed by 28 cycles of 95°C for 30 seconds, 54°C for 30 seconds, and 72°C for 0:45 seconds.
  • the PCR fusion fragment of aprE promoter-/?, stearothermophilus nprT gene + Terminator was digested with EcoRl and Hmdm restriction endonucleases.
  • the pAC vector was digested with Ec ⁇ Rl and Hin ⁇ JE restriction endonucleases.
  • the restriction endonuclease digested aprE promoter-!?, stearothermophilus nprT DNA fragment was then ligated with the restriction endonuclease digested pAC vector.
  • TempliPhi rolling circle amplification was then used to generate large amounts of the ligated aprE promoter-5.
  • stearothermophilus nprT pAC DNA molecule using the manufacturer's protocol (i.e., IuI aprE promoter-2?. stearothermophilus nprT pAC ligation reaction, 5ul TempliPhi Sample Buffer, 5ul TempliPhi Reaction Buffer, and 0.2ul TempliPhi Enzume Mix, for an ⁇ llul total reaction; incubated at 30 0 C for 3 hours).
  • the TempliPhi reaction was then transformed directly into competent B. subtilis cells for integration into aprE promoter locus, thereby generating Bacillus strain EL560, confirmed by DNA sequencing analysis (See, Figure 20).
  • FIG. 21 provides a schematic diagram of the amplification of the individual DNA fragments.
  • PCR Splice Overlap Extension (SOE) reaction was used to join the 2 separate DNA fragments together.
  • the following reagents were combined: IuI aprE promoter DNA fragment, IuI B. caldolyticus npr gene fragment, IuI Primer EL-755 (25uM), IuI Primer EL-741 (25uM), 5ul 1Ox PfuUltra II Fusion HS DNA Polymerase buffer, IuI dNTP (1OmM), IuI PfuUltra ⁇ Fusion HS DNA Polymerase, and 39ul distilled, autoclaved water, to provide a total reaction volume of 50 ul.
  • the PCR cycles were: 95 0 C for 2 minutes (1 st cycle only), followed by 28 cycles of 95°C for 30 seconds, 54 D C for 30 seconds, and 72°C for 0:45 seconds.
  • caldolyticus npr gene + Terminator was digested with EcoR ⁇ and H»tdHI restriction endonucleases.
  • the pAC vector was digested with EcoR ⁇ and Hwd ⁇ l restriction endonucleases.
  • caldolyticus npr DNA fragment was then ligated with the restriction endonuclease digested pAC vector. TempliPhi rolling circle amplification was then used to generate large amounts of the ligated aprE promoter-B.
  • PCR Splice Overlap Extension (SOE) reaction was used to join the 2 separate DNA fragments together.
  • the following reagents were combined: IuI aprE promoter DNA fragment, IuI B. thuringiensis nprB gene fragment, IuI Primer EL-755
  • the PCR fusion fragment of aprE promoter-ZJ. thuringiensis nprB gene + Terminator was digested with EcoRI and HindJR restriction endonucleases.
  • the pAC vector was digested with Ec ⁇ RI and HindTR restriction endonucleases.
  • thuringiensis nprB DNA fragment was then ligated with the restriction endonuclease digested pAC vector.
  • the ligation mixture was then transformed into TOPlO chemically competent E. coli cells. After identification of plasmids containing the correct DNA construct sequence for plasmid pEL568, transformed into competent B. subtilis cells.
  • DNA plasmid preparation shows that plasmid pEL568 is stable in B. subtilis and does not integrate into the aprE promoter locus.
  • Figure 24 provides a map of plasmid pEL568.
  • a homology model of the mature domain of NprE from Bacillus amyloliquefaciens is provided.
  • the protein sequence of the mature domain of the NprE sequence (SEQ ID NO: 192) was run through the program BlastP (NCBI). This program matches the sequence to other known sequences of varying sequence identity. From the output, sequences for which an X-ray crystal structures are known were identified. These sequences included S. aureus Npr (pdb id IBQB) P. aeruginosa Npr (pdb idlEZM), B. thermolyticus thermolysin (pdb id IKEI) and B.
  • aeruginosa Npr (pdb idlEZM)(SEQ ID NO: 194), and B. cereus Npr (pdb id INPC)(SEQ ID NO: 195) sequences were aligned using known structure, in order to obtain the most accurate sequence alignment (i.e., a structure based sequence alignment was produced).
  • the NprE mature sequence was aligned to this structure based sequence alignment.
  • an initial homology model of NprE was produced using the B. cereus Npr (pdb id INPC) structure as a template, and using the sequence alignment of NprE to B. cereus Npr produced above. It was clear from inspection of this alignment that whereas B. cereus Npr contains four Ca 2+ ion binding sites, while NprE only contains two Ca 2+ ion binding sites.
  • the metal ions (Le., Zn 2+ , and two Ca 2+ ) were computationally fixed, as were their respective protein ligands.
  • the rest of the model structure was computationally minimized using the CHARMM22 parameter set, resulting in the final homology model.
  • Equest grass Grass Medium scrubbed on cotton (10 x 7.5 cm)
  • EMPA 221 Unsoiled cotton used as ballast (10 x 10 cm)
  • proteases were tested in a specially developed washing test, using three different cotton swatches, soiled with:
  • grass medium (10.0 x 7.5 cm; Equest); and
  • pigment, oil and milk (10.0 x 7.5 cm designated with the numbers C-10 CFT).
  • the washing tests were performed in a bench top model Terg-O-Tometer (US Testing), equipped with six stainless steel test vessels.
  • the stainless steel test vessels each contained 1.6 g of TIDE® 2005 liquid detergent base, dissolved in 1000 ml water of 105 ppm/6 grains per gallon, and were each loaded with six of the same soiled cotton swatches and two extra ballast cotton swatches (EMPA 221).
  • a selected protease e.g., neutral metalloprotease or another protease was added to each vessel in a concentration from 0.00 to 5.50 mg active protein per liter suds.
  • the tests were carried out for 12 minutes at 15 °C/60 0 F, with an agitation of 100 rpm.
  • the swatches were rinsed for 3 minutes under cold tap water and placed in a spin-drier.
  • the grass swatches were air-dried and covered with dark clothing to limit the sensitivity of the grass stains to light. All other swatches were ironed. All experiments were performed in quadruplicate.
  • the results of the Terg-OTometer (TOM) assay for purified MULTIFECT® are shown in Figure 26, and compared with those of subtilisin (BPN' Y217L), a serine alkaline protease.
  • the TOM provided a fully operational and valid means for discriminating between the different wash performances of various proteases (e.g., serine proteases, neutral metalloprotease, and variants thereof).
  • the TOM tests were performed on BMI and Equest medium-soiled grass surface with TIDE® 2005 as the base detergent.
  • Example 2 experiments conducted to assess the performance of various nprE variants in the BMI assay outlined above are described.
  • the methods provided prior to Example 1 were used (See, "Microswatch Assay for Testing Protease Performance").
  • the results for multiply-substituted variants with Performance Indices greater than one (PI > 1) and those with Performance Indices less than one (PI ⁇ 1) are provided in the Tables below.
  • Table 13.1 data obtained for selected single-substitution variants in the BMI- TIDE® 2X performance assay are provided.
  • the Table provides performance indices, which where calculated as described above for the variants, which show improved performance compared to the WT enzyme. Those variants, which have a performance index greater than 1, have an improved performance.
  • Table 13.2 data obtained for selected multiple-substitution variants in the BMI- TIDE® 2X performance assay are provided.
  • the Table provides performance indices, which where calculated as described above for the variants, which show improved performance compared to the WT enzyme. Those variants, which have a performance index greater than 1, have an improved performance.
  • Example 2 experiments conducted to determine the stability of nprE variants are described.
  • the methods describe prior to Example 1 were used to determine the performance indices (See, "NprE stability assays in the presence of detergent" above).
  • the following tables provide the results for those variants with Performance Indices greater than one (PI>1) tested with and without DTPA.
  • the stability was measured by determining AGLA activity before and after incubation at elevated temperature.
  • the table contains the relative stability values compared to WT under these conditions. It is the quotient of (Variant residual activity/WT residual activity). A value greater than one indicates higher stability in the presence of detergent.
  • Tables 14.1 and 14.2 data are provided showing the relative stability data of single-substitution variants of NprE relative to the stability of the WT NprE stability under these conditions, with and without DTPA.
  • Table 14.5 represent the relative stability data of variants of NprE relative to the stability of the WT NprE stability in the citrate stability assay.
  • the stability was measured by determining casein activity by determining AGLA activity before and after incubation at elevated temperature (See, "Citrate Stability Assay" above).
  • the table contains the relative stability values compared to WT under these conditions. It is presented as the quotient of (Variant residual activity/WT residual activity). A value greater than one indicates higher stability in the presence of detergent.
  • Water hardness concentrate 15,000 grains per gallon (gpg), 3: 1 Ca:Mg I M Bis-TRIS-propane buffer
  • the swatches were prepared for treatment. Three replicates per treatment were conducted, with 18 swatches used per treatment. The grass swatches were prepared in a dark room to prevent fading. The reflectance values of about 18 soiled swatches were obtained using a Minolta Chromameter. Three readings were obtained per swatch. The L values, average L value and standard deviation were recorded. This is the Lj nJtJ31 value.
  • the enzyme concentrations used were 0 mg/L, 0.275 mg/L, 0.55 mg/ml, 1.65 mg/L, 2.65 mg/L, and 5,50 mg/L.
  • the nprE concentrations used were 0 mg/L, 0.1925 mg/L, 0.385 mg/L, 1.155 mg/L, 1.925 mg/L, and 3.85 mg/L (the concentrations of BPN' Y217L were the same as those used in the BMI tests). Agitation was started and the swatches were added.
  • ⁇ %SR %SR treatme nt " %SR no enzyme control
  • BPN' Y217L was compared to nprE on EMPA 116 (BMI), at pH values of 6.7, 7.5, 8.5, and 9.5.
  • the performance of nprE on EMPA 116 appeared to peak at about pH 8, while the performance of BPN' Y217L peaked at about pH 8.8.
  • the performance of these enzymes was equal at pH 9.5. In addition, there was no difference in the performance of these enzymes on Equest grass (med) at pH 7.8-8.4.
  • This Example describes cleaning experiments to determine the cleaning performance of PMN and nprE.
  • the cleaning performance of PMN and nprE enzymes were tested in Liquid TIDE® detergent in comparison with a benchmark serine protease (Protease A) on protease sensitive stains. As shown in the table below, PMN and nprE remove stains much better than protease A, even at low enzyme levels. In the following Tables, the higher SRI values indicate a better cleaning performance.
  • the thermal stability of wild-type NprE was determined at two different concentrations, in order to show the effect of protein concentration on the thermal melting point.
  • the Tm values for 220 ppm and 440 ppm were determined to be 67.6 + 0.5 and 69.2 + 0.5 0 C, respectively.
  • the protein concentration effect highlights a second-order event. It is contemplated that this is either aggregation or autolysis. However, it is not intended that the present invention be limited to any particular mechanism. Nonetheless, these results indicate that for an accurate determination and any comparison of thermal melting points for NprE require that the protein concentrations be well matched.
  • the effect of the scan rate on the thermal melting point also showed a dependence where the Tm was dependent on the scan rate up to 150 °C/hr, and then leveled off between 150- 200 °C/hr. Based on these results, 200 °C/hr was selected as the upper scan rate for all studies to minimize the dependence of the Tm on scan rate.
  • Table 4 also includes the DSC thermal melting points obtained for NprE and variants in the presence of 130 mM citrate. In most cases, two protein concentrations were scanned. As indicated in this Table, in the case of the scans in the presence of 130 mM citrate not all proteins showed a thermal unfolding profile.
  • DSC Results A representative Figure of the thermal unfolding profiles (DSC scans) for wild type and various mutants of NprE are shown in Figure 27.
  • the unfolding profiles indicate the wild-type midpoint and show selective mutants that display increased thermal melting points relative to wild-type and those that display decreased melting points relative to wild-type.
  • This Figure clearly highlights that the DSC distinguished between stable and less stable NprE variants, and is useful as a secondary screen.
  • a general trend is observed between the thermal melting points of the variants and their stability in detergent.
  • the variants S66E, S199E, D220P/E, S 129FV are all winners in TIDE® and show an approximate 1 0 C increase in thermal melting point relative to wild type NprE. This 1 0 C increase in thermal melting point is small yet significant, as thermal stability typically requires multiple amino acid substitutions.
  • Figure 28 shows the thermal unfolding of NprE variants that display a thermal unfolding profile in the presence of 130 mM citrate.
  • Citrate is a detergent component that rapidly causes the autolysis of NprE, in the absence of calcium.
  • For wild-type NprE there is no thermal unfolding profile in the presence of citrate, which is consistent with a protein that is already unfolded or lacks a well-formed hydrophobic core.
  • Mutants that display a thermal unfolding profile in the presence of citrate are included in Table 17. These variants have thermal melting points in the range of 47- 56 0 C.
  • the DSC scans in the presence of 130 mM citrate indicated variants that are more stable than wild-type NprE to citrate. For example, citrate-stable variants are show to contain either S129I or S129V and combinatorials containing either of these substitutions show a + 5 0 C increase in thermal melting point.
  • Figure 29 shows the results of experiments including various additives.
  • the buffer was 5 mM HEPES, pH 8.0.
  • the samples were scanned from 20 - 100 0 C using a scan rate of 200°C/hr.
  • the horizontal line represents the Tm for wild-type NprE with no additive.
  • Tm thermal melting point
  • NprE Purified NprE
  • B.S. NprE Bacillus subtilis NprE
  • B.T. NprB Bacillus thuringiensis NprB
  • TNN Bacillus thermoproteolyticus thermolysin
  • one pre-washed BMI microswatch was first added into each well of a 96-well plate. Then, 190ul of Ix compact TIDE® (780ug/ml compact TIDE®, 5mM HEPES, pH8, 6gpg water hardness) were added.
  • All ICPMS and micro-PIXE samples were prepared in metal free buffer to remove any exogenous metal contaminants. Typically, 250 uL of 40 mg/mL NprE samples were buffer exchanged three times with 20 mM HEPES, pH 8.2 using YM-10 microdialysis apparatus. Metal free buffer was generated by passing the buffer through a column packed with Chelax 100 resin. The final protein concentration was determined using Bicinchoninic acid protein determination assay kit (BCA assay) from Sigma. ICPMS samples were analyzed at the West Coast Analytical Services, Inc. Micro-PIXE samples were analyzed at the Ion Beam Analysis Laboratory.
  • BCA assay Bicinchoninic acid protein determination assay kit
  • Table 19-1 shows ICPMS metal analysis results for calcium and zinc ions from NprE wild type. Relative to protein concentration, two calcium ions and two zinc ions were found to be present in the sample.
  • the MicroPIXE elemental composition analysis plot measured the metal contents relative to a protein internal standard. All peaks detected using Micro-PIXE were calculated relative to the sulfur peak arising from three methionines in the case of NprE. An observed large chloride ion peak was due to the presence of salt in buffer.
  • Table 18-2 shows the metal content determined by Micro-PIXE, which indicates that in general, NprE contains two tightly bound calcium and one zinc ion per protein molecule. Wild type NprE showed 1 zinc ion with 2 calcium ions. It is contemplated that calcium ions may have shown a low occupancy rate due to preparation of the sample. S58D and T60D showed close to two zinc ions per protein indicating a possible extra zinc ion binding to the site. The double variant has two added cysteines adding the accuracy of the technique. However, it is not intended that the present invention be limited to any particular embodiment with a specific number of ions.
  • thermolysin or thermolysin-like proteases (ILPs)(See e.g., Dahlquist et al, Biochem., 15:1103-1111 [1976]; Srpingman et al, (1995) Biochemistry 34, 15713-15720 [1995]; and Willenbrock et al, (1995) FEBS Lett. 358:189-192 [1995]), NprE was found to contain at least two tightly bound calcium ions and one zinc ion per molecule. A potential third calcium binding site is proposed but expected to be very weak. Since all samples were desalted to remove any exogenous metals, these weakly bounding calcium sites are expected to be unoccupied. EXAMPLE 20 Stabilizing NprE with Calcium Formate in TIDE® Compact HDL Detergent
  • a full central composite response surface model with duplicate center points was used as a DOE method.
  • a total of 16 unique formulations varying four components were pre-made according to the composition variations listed in Table 19.1.
  • LAS was varied from 0 - 6% (w/w) with DTPA (0 - 0.25%) and calcium-formate (0 - 0.2%) at a fixed concentration of citric acid (1.9%). All other components of the TIDE® detergent were held constant.
  • the component concentration boundary conditions were determined based on phase stability of the various mixes.
  • the protein stability tests were conducted with 780 ppm nprE in the full strength (-100%) formulation mixes and incubated at 32 0 C. Inactivation was measured up to 24 hours.
  • Table 20.2 and Figure 31 show the results of NprE stability measurements in various formulation mixes. Average rates and the standard deviation were the averaged NprE inactivation rate (hour "1 ) from three independent measurements. Qualitatively, formulations with low DTPA content with high calcium load tend to be more stable in the full strength compact TIDE®. As an example, Formulation #5, with no addition of DTPA and high calcium formate level showed the lowest inactivation rate, indicating high NprE stability. In contrast, Formulation #9, with high DTPA concentration with no added calcium formate showed lowest stability. In Table 20.2, the ranking is based on measured stability (Le., averaged rates). Runs are from three independent stability experiments.
  • Figure 33 shows NprE inactivation effects by DTPA at varying levels of fixed calcium formate concentration.
  • Panel A shows rate of NprE inactivation by DTPA without any added calcium formate. The correlation shows that DTPA has significant detrimental effect.
  • Panel B shows some decreased effect of DTPA with 0.1% calcium formate.
  • Panel C shows significantly decreased effect of DTPA with 0.2% calcium formate.
  • Figure 34 shows DOE analysis software (Fusion Pro) generated prediction profile of DTPA and calcium formate composition based on response goal (decay rate) of less than 0.5 hr "1
  • Metalloprotease NprE In this Example, methods used to assess the citrate-induced autolysis of wild-type and recombinant variant nprE ⁇ e.g., B. subtilis variant) are described. In these experiments, autolysis of the neutral metalloprotease from B. amyloliquefaciens (natural and the recombinant variant expressed in B. subtilis) was induced using sodium citrate (Sigma). The autolysis process was controlled by performing the reaction at 4 0 C in 25 mM MES, pH 6.5, buffer.
  • the autolysis of 0.4 mg/ml NprE was optimized by varying either: (a) the time of incubation (10-100 minutes) in 10 mM citrate; or (b) the citrate concentration (10-100 mM) over 100 minutes.
  • a control of neutral metalloprotease diluted in buffer alone ⁇ i.e., no citrate) was incubated under similar conditions.
  • the autolytic reactions were terminated by addition of an equal volume of IN HCl, the samples were precipitated using TCA and the pellet was washed and dried using acetone. The resultant pellet was resuspended in 20 uL buffer, pH 6.5, and 4X LDS sample buffer (NuPage, Invitrogen)
  • the autolytic fragments were resolved by 10 % (w/v) SDS-PAGE and electroblotted onto a PVDF membrane.
  • the first 10 amino acid residues were sequenced by Edman degradation (Argo Bioanalytica).
  • the partial amino acid sequences of the autolytic fragments were determined using trypsin in-gel digestion and analyzed using LCQ-MS (Agilent).
  • the in-gel digestion process involved macerating the gel piece that contained the protein, removal of the Coomassie blue stain followed by re-hydration of the gel pieces in 25 mM NH 4 CO 3 containing 2 M urea. Trypsin was added to the re-hydrated gel pieces for approx. 6 hours at 37 0 C.
  • the peptides were extracted using acetonitrile and TCA.
  • the peptides were separated on a C4-hydrophobic column (Vydac) using an acetonitrile- water gradient.
  • the resultant peptide maps were searched with the SEQUEST® database search program against a database containing Genencor enzymes.
  • amino acid sequences of the first 10 amino acids of each of the fragments were compared with the known amino acid sequence for B. amyloliquefaciens NprE. This enabled the identification of the amino acid at the N-termini and hence the cleavage site(s).
  • the generation of the citrate-induced fragments and their resolution was shown on 10 % SDS-PAGE.
  • the sizes of the fragments were identified using a standard molecular weight marker from Invitrogen.
  • 10 inM citrate two fragments in addition to remaining intact NprE were observed over the 100 minute time range.
  • the two fragments formed at the low citrate concentration were found to be 24 kDa and 9 kDa in size.
  • the intact nprE is 32 kDa.
  • the 100-minute time range results in a good proportion of cleaved protein (i.e., the primary autolysis fragments). No additional fragments were observed or detected under these conditions.
  • a study over 100 minutes in the presence of increasing citrate was performed to obtain the secondary autolytic fragments.
  • the identity of the N-termini of the 24 kDa, 9 kDa (first two fragments), and the 21 kDa, 15 kDa and 11 kDa (the next autolytic fragments) were determined using Edman degradation (Argo Bioanalytica).
  • Bands Al, A 3 and A4 have the native N-terminal sequence that matches the N-terminus for the intact NprE.
  • the sequencing report for Band A2 showed three fragments where the least intense sequence appeared to be identical to the more intense sequence, except that it was two residues and one residue shorter than the more intense sequences, respectively. This was consistent with a fraying of that particular protein fragment.
  • the pattern and the sizes of the gel fragments suggest that the 15 kDa (Band A4) may be derived from the 21-kDa fragment (Band A3) and hence the C-terminus is deduced to be at or near position 198.
  • Figure 35 provides the amino acid sequences for the various fragments (1-5 or Al-5 for
  • Fragment 1 has the N-terminal residues equivalent to that for the intact native protein (SEQ ID NO:222), fragment 2 (Ad2) N-terminus starts at or near D220 (SEQ ID NO:223). The following two amino acid residues (A221 and G222) are also highlighted because this fragment was identified as being frayed.
  • Fragment 3 (A3) (SEQ ID NO:224) and fragment 4 (A4) (SEQ ID NO:225) have the N-terminus of the intact protein, and fragment 5 (A5) (SEQ I DNO:226) starts at L198.
  • the C-terminus of fragment 4 is likely to be at or near M138 (based on the size difference between A3 and A4). The corresponding fragment for A3 was not detected.
  • LCQ-MS Trypsin digestion followed by LCQ-MS of the peptide maps for fragments 1 through 5 positively identified several amino acid peptides within the respective fragments. These are highlighted in Figure 35.
  • the LCQ-MS provided a positive control for the identity of the fragments.
  • primary cleavage sites were identified at amino acid positions D220, A221, G222, M138, and L198. These sites were targeted using site-directed mutagenesis and site-evaluation libraries of D220, A221, G222, L198, and M138, D139 were created.
  • the mutant proteins were screened for increasing stability in detergent and for BMI-wash performance, as indicated herein. In some instances, the amino acids alongside these sites were also selected for protein engineering, in order to ensure that the clip site was indeed targeted.
  • NprE in extreme detergent conditions requires that a more stable NprE molecule be used in these settings.
  • substitutions of one or more of the autolytic sites of NprE have resulted in a more detergent-stable nprE molecule for use in these extreme detergents.
  • liquid laundry detergent compositions of the present invention are prepared:
  • This Example provides various formulations for granular and/or tablet laundry detergents.
  • the following laundry compositions of present invention which may be in the form of granules or tablet, are prepared.
  • This Example provides various formulations for liquid laundry detergents.
  • the following liquid laundry detergent formulations of the present invention are prepared:
  • This Example provides various formulations for high density dishwashing detergents.
  • the following compact high density dishwashing detergents of the present invention are prepared:
  • This Example provides various tablet detergent formulations.
  • the following tablet detergent compositions of the present invention are prepared by compression of a granular dishwashing detergent composition at a pressure of 13KN/cm ⁇ using a standard 12 head rotary press:
  • Nonionic 1.5 2.0 2.0 2.2 1.0 4.2 4.0 6.5
  • the pH of Examples 28(1) through 28(VII) is from about 10 to about 11.5; pH of 15(VIII) is from 8-10.
  • the tablet weight of Examples 28(1) through 28(VIII) is from about 20 grams to about 30 grams.
  • This Example provides various formulations for liquid hard surface cleaning detergents.
  • the following liquid hard surface cleaning detergent compositions of the present invention are prepared:
  • the pH of Examples 29(1) through (VII) is from about 7.4 to about 9.5.

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Abstract

The present invention provides methods and compositions comprising at least one neutral metalloprotease enzyme that has improved storage stability. In some embodiments, the neutral metalloprotease finds use in cleaning and other applications. In some particularly preferred embodiments, the present invention provides methods and compositions comprising neutral metalloprotease(s) obtained from Bacillus sp. In some more particularly preferred embodiments, the neutral metalloprotease is obtained from B. amyloliquefaciens. In still further preferred embodiments, the neutral metalloprotease is a variant of the B. amyloliquefaciens neutral metalloprotease. In yet additional embodiments, the neutral metalloprotease is a homolog of the the B. amyloliquefaciens neutral metalloprotease. The present invention finds particular use in applications including, but not limited to cleaning, bleaching and disinfecting.

Description

USE AND PRODUCTION OF STORAGE-STABLE NEUTRAL METALLOPROTEASE
The present application claims priority to pending U.S. Provisional Patent
Application Serial No. 60/726,448, filed October 12, 2005.
FIELD OF THE INVENTION
The present invention provides methods and compositions comprising at least one neutral metalloprotease enzyme that has improved storage stability. In some embodiments, the neutral metalloprotease finds use in cleaning and other applications. In some particularly preferred embodiments, the present invention provides methods and compositions comprising neutral metalloprotease(s) obtained from Bacillus sp. In some more particularly preferred embodiments, the neutral metalloprotease is obtained from B. amyloliquefaciOens. In still further preferred embodiments, the neutral metalloprotease is a variant of the B. amyloliquefaciens neutral metalloprotease. In yet additional embodiments, the neutral metalloprotease is a homolog of the the B. amyloliquefaciens neutral metalloprotease. The present invention finds particular use in applications including, but not limited to cleaning, bleaching and disinfecting.
BACKGROUND OF THE INVENTION
Detergent and other cleaning compositions typically include a complex combination of active ingredients. For example, most cleaning products include a surfactant system, enzymes for cleaning, bleaching agents, builders, suds suppressors, soil-suspending agents, soil-release agents, optical brighteners, softening agents, dispersants, dye transfer inhibition compounds, abrasives, bactericides, and perfumes. Despite the complexity of current detergents, there are many stains that are difficult to completely remove. Furthermore, there is often residue build-up, which results in discoloration {e.g., yellowing) and diminished aesthetics due to incomplete cleaning. These problems are compounded by the increased use of low {e.g., cold water) wash temperatures and shorter washing cycles. Moreover, many stains are composed of complex mixtures of fibrous material, mainly incorporating carbohydrates and carbohydrate derivatives, fiber, and cell wall components (e.g., plant material, wood, mud/clay based soil, and fruit). These stains present difficult challenges to the formulation and use of cleaning compositions. In addition, colored garments tend to wear and show appearance losses. A portion of this color loss is due to abrasion in the laundering process, particularly in automated washing and drying machines. Moreover, tensile strength loss of fabric appears to be an unavoidable result of mechanical and chemical action due to use, wearing, and/or washing and drying. Thus, a means to efficiently and effectively wash colored garments so that these appearance losses are minimized is needed.
In sum, despite improvements in the capabilities of cleaning compositions, there remains a need in the art for detergents that remove stains, maintain fabric color and appearance, and prevent dye transfer. In addition, there remains a need for detergent and/or fabric care compositions that provide and/or restore tensile strength, as well as provide anti- wrinkle, anti-bobbling, and/or anti-shrinkage properties to fabrics, as well as provide static control, fabric softness, maintain the desired color appearance, and fabric anti-wear properties and benefits. In particular, there remains a need for the inclusion of compositions that are capable of removing the colored components of stains, which often remain attached to the fabric being laundered. In addition, there remains a need for improved methods and compositions suitable for textile bleaching.
SUMMARY OF THE INVENTION
The present invention provides methods and compositions comprising at least one neutral metalloprotease enzyme that has improved storage stability. In some embodiments, the neutral metalloprotease finds use in cleaning and other applications. In some particularly preferred embodiments, the present invention provides methods and compositions comprising neutral metalloprotease(s) obtained from Bacillus sp. In some more particularly preferred embodiments, the neutral metalloprotease is obtained from B. amyloliquefaciens. In still further preferred embodiments, the neutral metalloprotease is a variant of the B. amyloliquefaciens neutral metalloprotease. In yet additional embodiments, the neutral metalloprotease is a homolog of the the B. amyloliquefaciens neutral metalloprotease. The present invention finds particular use in applications including, but not limited to cleaning, bleaching and disinfecting.
The present invention provides novel neutral metalloproteases, novel genetic material encoding the neutral metalloprotease enzymes, and neutral metalloprotease proteins obtained from Bacillus sp., in particular, B. amyloliquefaciens, and variant proteins developed therefrom. In particular, the present invention provides neutral metalloprotease compositions obtained from Bacillus sp., particularly B. amyloliquefaciens, DNA encoding the protease, vectors comprising the DNA encoding the neutral metalloprotease, host cells transformed with the vector DNA, and an enzyme produced by the host cells. The present invention also provides cleaning compositions (e.g., detergent compositions), animal feed compositions, and textile and leather processing compositions comprising neutral metalloprotease(s) obtained from a Bacillus species, in particular, B. amyloliquefaciens. In alternative embodiments, the present invention provides mutant (i.e., variant) neutral metalloproteases derived from the wild-type neutral metalloproteases described herein. These mutant neutral metalloproteases also find use in numerous applications.
The present invention provides isolated neutral metalloproteases obtained from a Bacillus species, in particular, B. amyloliquefaciens. In further embodiments, the neutral metalloprotease comprises the amino acid sequence set forth in SEQ ID NOS:3, 4 or 18. In additional embodiments, the present invention provides isolated neutral metalloproteases comprising at least 45% amino acid identity with the neutral metalloprotease comprising SEQ ID NOS:3, 4 or 18. In some embodiments, the isolated neutral metalloproteases comprise at least 50% identity, preferably at least 55%, more preferably at least 60%, yet more preferably at least 65%, even more preferably at least 70%, more preferably at least 75%, still more preferably at least 80%, more preferably 85%, yet more preferably 90%, even more preferably at least 95%, and most preferably 99% identity with the neutral metalloprotease comprising SEQ ID NO:3, 4 or 18. The present invention also provides isolated neutral metalloproteases having immunological cross-reactivity with the metalloprotease obtained from B. amyloliquefaciens, as well as compositions comprising these neutral metalloproteases. In alternative embodiments, the neutral metalloproteases have immunological cross-reactivity with neutral metalloproteases comprising the amino acid sequence set forth in SEQ ID NOS:3, 4 or 18. In still further embodiments, the neutral metalloproteases have cross-reactivity with fragments {i.e., portions) of the neutral metalloprotease of B. amyloliquefaciens, and/or neutral metalloprotease comprising the amino acid sequence set forth in SEQ ID NOS:3, 4 or 18. Indeed, it is intended that the present invention encompass fragments {e.g., epitopes) of the B. amyloliquefaciens metalloprotease that stimulate an immune response in animals (including, but not limited to humans) and/or are recognized by antibodies of any class. The present invention further encompasses epitopes on metalloproteases that are cross-reactive with B. amyloliquefaciens metalloprotease epitopes. In some embodiments, the metalloprotease epitopes are recognized by antibodies, but do not stimulate an immune response in animals (including, but not limited to humans), while in other embodiments, the metalloprotease epitopes stimulate an immune response in at least one animal species (including, but not limited to humans) and are recognized by antibodies of any class. The present invention also provides means and compositions for identifying and assessing cross-reactive epitopes.
In some embodiments, the present invention provides the amino acid sequences set forth in SEQ ID NOS:3, 4 or 18. In alternative embodiments, the sequence comprises substitutions at least one amino acid position in SEQ ID NOS:3, 4 or 18. In some particularly preferred alternative embodiments, the sequence comprises substitutions at least one amino acid position in SEQ ID NO: 18. In some preferred embodiments, the present invention provides neutral metalloprotease variants having an amino acid sequence comprising at least one substitution of an amino acid made at a position equivalent to a position in a B. amyloliquefaciens neutral metalloprotease comprising the amino acid sequence set forth in SEQ ID NOS:3, 4 or 18. In some additional preferred embodiments, the.present invention provides neutral metalloprotease variants having an amino acid sequence comprising at least one substitution of an amino acid made at a position equivalent to a position in a B. amyloliquefaciens neutral metalloprotease comprising the amino acid sequence set forth in SEQ ID NO: 18. In alternative embodiments, the present invention provides neutral metalloprotease variants having an amino acid sequence comprising at least one substitution of an amino acid made at a position equivalent to a position in a B. amyloliquefaciens neutral metalloprotease comprising at least a portion of SEQ ID NOS:3, 4 or 18. In some alternative preferred embodiments, the neutral metalloproteases comprise multiple mutations in at least a portion of SEQ ID NOS:3, 4 or 18. In some alternative preferred embodiments, the neutral metalloproteases comprise multiple mutations in at least a portion of SEQ ID NO: 18.
In yet additional embodiments, the present invention provides the amino acid sequence set forth in SEQ ID NO: 18. In alternative embodiments, the sequence comprises substitutions at least one amino acid position in SEQ ID NO:18. In some preferred embodiments, the present invention provides neutral metalloprotease variants having an amino acid sequence comprising at least one substitution of an amino acid made at a position equivalent to a position in a B. amyloliquefaciens neutral metalloprotease comprising the amino acid sequence set forth in SEQ ID NO:18. In alternative embodiments, the present invention provides neutral metalloprotease variants having an amino acid sequence comprising at least one substitution of an amino acid made at a position equivalent to a position in a B. amyloliquefaciens neutral metalloprotease comprising at least a portion of SEQ ID NO:18. In some alternative preferred embodiments, the neutral metalloproteases comprise multiple mutations in at least a portion of SEQ ID NO: 18.
In some particularly preferred embodiments, these variants have improved performance as compared to wild-type B. amyloliquefaciens neutral metalloprotease. The present invention also provides neutral metalloprotease variants having at least one improved property as compared to the wild-type neutral metalloprotease. In some additional particularly preferred embodiments, these variants have improved stability as compared to wild-type B. amyloliquefaciens neutral metalloprotease. In some further preferred embodiments, these variants have improved thermostability as compared to wild-type B. amyloliquefaciens neutral metalloprotease. In yet additional preferred embodiments, these variants have improved performance under lower or higher pH conditions, as compared to wild-type B. amyloliquefaciens neutral metalloprotease.
The present invention also provides neutral metalloproteases comprising at least a portion of the amino acid sequence set forth in SEQ ID NOS:3, 4 or 18. In some embodiments, the nucleotide sequences encoding these neutral metalloproteases comprise a nucleotide sequence selected from SEQ ID NOS: 1, 2, 12, and/or 13. In some embodiments, the neutral metalloproteases are variants having amino acid sequences that are similar to that set forth in SEQ ID NOS:3, 4 or 18. In yet additional embodiments, the neutral metalloproteases are variants and/or homologs. In still further embodiments, the neutral metalloproteases are those set forth in any of Figures 3 through 5. In other embodiments, the neutral metalloproteases are variants of those set forth in Figure 3, 4 and/or 5. The present invention also provides expression vectors comprising a polynucleotide sequence encoding at least a portion of the neutral metalloprotease set forth in SEQ ID NOS:3, 4 or 18. The present invention further provides expression vectors comprising a polynucleotide sequences that encode at least one neutral metalloprotease variant having amino acid sequence(s) comprising at least one substitution of an amino acid made at a position equivalent to a position in a Bacillus neutral metalloprotease comprising the amino acid sequence set forth in SEQ ID NOS:3, 4 or 18. In further embodiments, the present invention provides host cells comprising these expression vectors. In some particularly preferred embodiments, the host cells are selected from the group consisting of Bacillus sp. The present invention also provides the neutral metalloproteases produced by the host cells. The present invention also provides compositions comprising at least a portion of an isolated neutral metalloprotease of obtained from a Bacillus sp., particularly, B. amyloliquefaciens, wherein at least a portion of the neutral metalloprotease is encoded by a polynucleotide sequence selected from SEQ ID NOS:1, 2, 12 and/or 13. In further embodiments, the present invention provides host cells comprising these expression vectors. In some particularly preferred embodiments, the host cells are Bacillus sp. The present invention also provides the neutral metalloproteases produced by the host cells.
The present invention also provides variant neutral metalloproteases, wherein the neutral metalloproteases comprise at least one substitution corresponding to the amino acid positions in SEQ ID NO:3 and/or SEQ ID NO: 18, and wherein variant metalloproteases have better performance in at least one property, as compared to wild-type B. amyloliquefaciens metalloprotease. In some particularly preferred embodiments, the present invention also provides variant neutral metalloproteases, wherein the neutral metalloproteases comprise at least one substitution corresponding to the amino acid positions in SEQ ID NO: 18, and wherein variant metalloproteases have better performance in at least one property, as compared to wild-type B. amyloliquefaciens metalloprotease.
The present invention also provides variant amino acids, wherein the variants comprise at least one substitution of an amino acid made at a position equivalent to a position in a neutral metalloprotease comprising the amino acid set forth in SEQ ID NO: 18, wherein the position(s) is or are selected from positions 1, 3, 4, 5, 6, 11, 12, 13, 14, 16, 21, 23, 24, 25, 31, 32, 33, 35, 36, 38, 44, 45, 46, 47, 48, 49, 50, 51, 54, 55, 58, 59, 60, 61, 62, 63, 65, 66, 69, 70, 76, 85, 86, 87, 88, 90, 91, 92, 96, 97, 98, 99, 100, 102, 109, 110, 111, 112, 113, 115, 117, 119, 127, 128, 129, 130, 132, 135, 136, 137, 138, 139, 140, 146, 148, 151, 152, 153, 154,
155, 157, 158, 159, 161, 162, 169, 173, 178, 179, 180, 181, 183, 184, 186, 190, 191, 192, 196, 198, 199, 200, 202, 203, 204, 205, 210, 211, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 228, 229, 237, 239, 240, 243, 244, 245, 248, 252, 253, 260, 261, 263, 264, 265, 267, 269, 270, 273, 277, 280, 282, 283, 284, 285, 286, 288, 289, 290, 292, 293, 296, 297, and 299.
The present invention also provides isolated neutral metalloprotease variants having an amino acid sequence comprising at least one substitution of an amino acid made at a position equivalent to a position in a neutral metalloprotease comprising the amino acid sequence set forth in SEQ ID NO: 18. In some embodiments, the isolated neutral metalloprotease variants have substitutions that are made at positions equivalent to positions 1, 3, 4, 5, 6, 11, 12, 13, 14, 16, 21, 23, 24, 25, 31, 32, 33, 35, 36, 38, 44, 45, 46, 47, 48, 49, 50, 51, 54, 55, 58, 59, 60, 61, 62, 63, 65, 66, 69, 70, 76, 85, 86, 87, 88, 90, 91, 92, 96, 97, 98, 99, 100, 102, 109, 110, 111, 112, 113, 115, 117, 119, 127, 128, 129, 130, 132, 135, 136, 137, 138, 139, 140, 146, 148, 151, 152, 153, 154, 155, 157, 158, 159, 161, 162, 169, 173, 178, 179, 180, 181, 183, 184, 186, 190, 191, 192, 196, 198, 199, 200, 202, 203, 204, 205, 210,
211, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 228, 229, 237, 239, 240, 243, 244, 245, 248, 252, 253, 260, 261, 263, 264, 265, 267, 269, 270, 273, 277, 280, 282, 283, 284, 285, 286, 288, 289, 290, 292, 293, 296, 297, and 299 of a neutral metalloprotease comprising an amino acid sequence set forth in SEQ ID NO:18. In additional embodiments, the isolated neutral metalloprotease variant comprises at least one mutation selected from T004C, T004E, T004H, T004I, T004K, T004L, T004M, T004N, T004P, T004R, T004S, T004V, T004W, T004Y, G012D, G012E, G012I, G012K, G012L, G012M, G012Q, G012R, G012T, G012V, G012W, K013A, K013C, K013D, K013E, K013F, K013G, K013H, K013I, K013L, K013M, K013N, K013Q, K013S, K013T, K013V, K013Y/T014F, T014G, T014H, T014I, T014K,T014L, T014M, T014P, T014Q, T014R, T014S, T014V, T014W, T014Y, S023A, S023D, S023F, S023G, S023I, S023K, S023L, S023M, S023N, S023P, S023Q, S023R, S023S, S023T, S023V, S023W, S023Y, G024A, G024D, G024F, G024G, G024H, G024I, G024K, G024L, G024M, G024N, G024P, G024R, G024S, G024T, G024V, G024W, G024Y, K033H, Q045C, Q045D, Q045E, Q045F, Q045H, Q045I, Q045K, Q045L, Q045M, Q045N, Q045P, Q045R, Q045T, Q045W, N046A, N046C, N046E, N046F, N046G, N046H, N046I, N046K, N046L, N046M, N046P, N046Q, N046R, N046S, N046T, N046V, N046W, N046Y, R047E, R047K, R047L, R047M, R47Q, R047S, R047T, Y049A, Y049C, Y049D, Y049E, Y049F, Y049H, Y049I, Y049K, Y049L, Y049N, Y049R, Y049S, Y049T, Y049V, Y049W, N050D, N050F, N050G, N050H, N050I, N050K, N050L, N050M, N050P, N050Q, N050R, N050W, N050Y, T054C, T054D, T054E, T054F, T054G, T054H, T054I T054K, T054L, T054M, T054N, T054P, T054Q, T054R, T054S, T054V, T054W, T054Y, S058D, S058H, S058I, S058L, S058N, S058P, S058Q, T059A, T059C, T059E, T059G, T059H, T059I, T059K, T059L T059M, T059N, T059P, T059Q, T059R, T059S, T059V,T059W, T060D, T060F, T060I, T060K, T060L, T060N, T060Q, T060R, T060V, T060W, T060Y, T065C, T065E,T065F, T065H, T065I, T065K, T065L, T065M, T065P, T065Q, T065R, T065V, T065Y, S066C, S066D, S066E, S066F, S066H, S066I, S066K, S066L,S066N, S066P, S066Q, S066R, S066T, S066V, S066W, S066Y,
Q087A, Q087D, Q087E, Q087H, Q087I, Q087K, Q087L, Q087M, Q087N, Q087R, Q087S, Q087T, Q087V, Q087W, N090C, N090D, N090E, N090F, N090G, N090H, N090K, N090L, N090R, N090T, N096G, N096H, N096K, N096R, K097H, K097Q, K097W, KlOOA, KlOOD, KlOOE, KlOOF, KlOOH, KlOON, KlOOP, KlOOQ, KlOOR, KlOOS, KlOOV, KlOOY, RI lOA, Rl 1OC, Rl 1OE, Rl 1OH, Rl 10K, Rl 1OL, Rl 1OM, Rl ION, Rl 1OQ, Rl 1OS, Rl 1OY, Dl 19E, D119H, D119I, D119L, D119Q, D119R, D119S, D119T, D119V, D119W, G128C, G128F, G128H, G128K, G128L, G128M, G128N, G128Q, G128R, G128W, G128Y, S129A, S129C, S129D, S129F, S129G, S129H, S 1291, S129K, S129L, S129M, S129Q, S129R, S129T, S129V, S129W, S129Y, F130I, F130K, F130L, F130M, F130Q, F130R, F130T, F130V, F130Y, S135P, G136I, G136L, G136P, G136V, G136W, G136Y, S137A, M138I, M138K, M138L, M138Q, M138V, D139A, D139C, D139E, D139G, D139H, D139I, D139K, D139L, D139M, D139P, D139R, D139S, D139V, D139W, D139Y, V140C, Q151I, E152A, E152C, E152D, E152F, E152G, E152H, E152L, E152M, E152N, E152R, E152S, E152W, N155D, N155K, N155Q, N155R, D178A, D178C, D178G, D178H, D178K, D178L, D178M, D178N, D178P, D178Q, D178R, D178S, D178T, D178V, D178W, D178Y, T179A, T179F, T179H, T179I, T179K, T179L, T179M, T179N, T179P, T179Q, T179R, T179S, T179V, T179W, T179Y, E186A, E186C, E186D, E186G, E186H, E186K, E186L, E186M, E186N, E186P, E186Q, E186R, E186S, E186T, E186V, E186W, E186Y, V190H, V190I, V190K, V190L, V190Q, V190R, S191F, S191G, S191H, S191I, S191K, S191L, S191N, S191Q, S191R, S191W, L198M, L198V, S199C, S199D, S199E, S199F, S199I, S199K, S199L, S199N, S199Q, S199R, S199V, Y204H, Y204T, G205F, G205H, G205L, G205M, G205N, G205R, G205S, G205Y, K211 A, K211C, K21 ID, K21 IG, K21 IM, K21 IN, K21 IQ, K21 IR, K21 IS,
K211T, K211V, K214A, K214C, K214E, K214I, K214L, K214M, K214N, K214Q, K214R, K214S, K214V, L216A, L216C, L216F, L216H, L216Q, L216R, L216S, L216Y, N218K, N218P, T219D, D220A,D220E, D220H, D220K, D220N, D220P, A221D, A221E, A221F, A221I, A221K, A221L, A221M, A221N, A221S, A221V, A221Y, G222C, G222H, G222N, G222R, Y224F, Y224H, Y224N, Y224R, T243C, T243G, T243H, T243I, T243K, T243L,
T243Q, T243R, T243W, T243Y, K244A, K244C, K244D, K244E, K244F, K244G, K244L, K244M, K244N, K244Q, K244S, K244T, K244V, K244W, K244Y, V260A, V260D, V260E, V260G, V260H, V260I, V260K, V260L,V260M, V260P, V260Q, V260R V260S, V260T, V260W, V260Y, Y261C, Y261F, Y261I, Y261L, T263E, T263F, T263H, T263I, T263L, T263M, T263Q, T263V, T263W, T263Y, S265A, S265C, S265D, S265E, S265K, S265N, S265P, S265Q, S265R,S265T, S265V, S265W, K269E, K269F, K269G, K269H, K269I, K269L, K269M, K269N, K269P, K269Q, K269S, K269T, K269V, K269W, K269Y, A273C, A273D, A273H, A273I, A273K, A273L, A273N, A273Q, A273R, A273Y, R280A, R280C, R280D, R280E, R280F, R280G, R280H, R280K, R280L, R280M, R280S, R280T, R280V, R280W, R280Y, L282F, L282G, L282H, L282I, L282K, L282M, L282N, L282Q, L282R, L282V, L282Y, S285A, S285C, S285D, S285E, S285K, S285P, S285Q, S285R, S285W, Q286A, Q286D, Q286E, Q286K, Q286P, Q286R, A289C, A289D, A289E, A289K, A289L, A289R, A293C, A293R, N296C, N296D, N296E, N296K, N296R, N296V, A297C, A297K, A297N, A297Q, A297R, and G299N. In still further embodiments the present invention provides isolated variant neutral metalloproteases, wherein the metalloproteases comprise multiple mutations selected from S023W/G024M, T004V/S023W/G024W, S023W/G024Y/A288V, T004L/S023W/G024Y, N046Q/N050F/T054L, N050Y/T059R/S129Q, S023W/G024W, A273H/S285P/E292G, S023Y/G024Y, S023Y/G024W, T004S/S023Y/G024W, N046Q/T054K, S023W/G024Y, T004V/S023W, T059K/S066N, N046Q/N050W/T054H/T153A, T004V/S023W/G024Y, L282M/Q286P/A289R, N046Q/R047K/N050Y/T054K, L044Q/T263W/S285R, T004L/S023W/G024W, R047K/N050F/T054K, A273H/S285R, N050Y/T059K/S066Q, T054K/Q192K, N046Q/N050W, L282M/Q286K, T059K/S066Q, T004S/S023W, L282M/Q286R/A289R/K011N, L282M/A289R, N046Q/N050W/T054H, T059K/S129Q, T004S/S023N/G024Y/F21 OL, T004V/S023W/G024M/A289V,
L282M/Q286K/A289R/S132T, N050W/T054H, L282M/Q286R, L282F/Q286K/A289R, T059R/S066Q, R047K/N050W/T054H, S265P/L282M/Q286K/A289R,
L282M/Q286R/T229S, L282F/Q286K, T263W/S285R, S265P/L282M/Q286K, T263H/A273H/S285R, T059R/S129V, S032T/T263H/A273H/S285R, T059R/S066Q/S129Q, T004S/G024W, T004V/S023W/G024M, T059K/S066Q/S129Q, L282M/Q286K/A289R/I253V, T004V/S023Y/G024W, T059R/S066N/S129Q, N050F/T054L, T004S/S023N/G024W, T059R/S066N, T059R/S066N/S129V, Q286R/A289R, N046Q/R047K/N050F/T054K, S265PΛL282M/Q286P/A289R, S265P/L282M/Q286R/A289R Q062K/S066Q/S129I, S023N/G024W, N046Q/R047K/N050W/T054H, R047K/T054K, T004L/G024W, T014M/T059R/S129V, T059R/S066Q/N092S/S129I, R047K7N050W/T054K, T004V/G024W, N047K7N050F/T054K, S265P/L282F/Q286K/N061Y, L282F/Q286K/E159V,
T004V/S023Y/G024M, S265P/L282F/A289R/T065S, T059K/F063L/S066N/S129V, T004L/S023W, N050F/T054H, T059R/S066Q/S129V, V190I/D220E/S265W/L282F, T004S/S023Y/G024M, T004L/S023N/G024Y, T059K/S066N/S129I, T059R/S066N/S129I, L282M/Q286R/A289R/P162S, N046Q/N050F/T179N, T059K/Y082C/S129V, T059K/S129I, N050Y/T054K, T059K/S066Q/V102A/S129Q, T059R/S066Q/S129I,
T059W/S066N/S129V/S290R, T059R/S129I, T059K/S066Q/S129I, T059K/S066Q/S129V, S265P/L282M/Q286R/A289R/T202S/K203N, T004V/S023N/G024W, S265P/Q286K, S265P/L282F/A289R, D220P/S265W, L055F/T059W/S129V, T059R7S129Q/S191R, N050W/T054K, T004S/S023W/G024M, R047K/N050F/T054H, T059K/S066N/K088E, T059K/S066Q/S129W291L, L282M/Q286R/A289R, T059R/S066N/F085S/S129I, L282F/Q286P/A289R, L282F/Q286R/A289R, G099D/S265P/L282F/Q286K/A289R, N046Q/N050F, N050Y/T059W/S066N/S129V, T009I/D220P/S265N, V190F/D220P/S265W, N157Y/T263W/A273H/S285R, T263W/A273H/S285R, T263W/S285W, T004V/S023Y, N046Q/R047K/N050W, N050W/T054L, N200Y/S265P/L282F/Q286P/A289R, T059R/S066Q/P264Q, T004V/G024Y, T004L/G024Y, N050Y/S191I, N050Y/T054L, T004L/S023W/G024Y/N155K, F169I/L282F/Q286R/A289R, L282M/Q286K/A289R, F130L/M138L/E152W/D183N, N046Q/R047K/N050Y/T054H, T004V/G024M, N050Y/T059W/S066Q/S129V, S023N/G024Y, T054H/P162Q, T004S/S023W/G024Y, N050Y/T054H, L282F/Q286R/A289R/F169I, R047K/N050W, V190F/D220P, L282M/F173Y, T004L/S023Y, N050W/A288D, V190I/D220P/S265Q, S265P/L282F/Q286P/A289R, S265P/L282F/Q286R/A289R, N046Q/N050Y/T054K, T059W/S066Q,
T263W/A273H/S285W T263W/A273H/S285P, S023Y/G024M, T004L/S023N/G024W, T004V/S023N/G024Y, T059W/S066N/S129Q, T004S/S023Y, T004S/S023N/G024M, T059W/S066N/A070T, T059W/S066Q/S129Q, T263W/A273H, A273H/285P, N046Q/R047K/N050Y/T054L, N046Q/R047K/N050Y, R047K/N050Y, T263H/S285W, R047K/N050F, N046Q/R047K/N050F/T054H, S023N/G024M, T004S/G024Y,
R047K/N050Y/T054H, T059W/S066N/S129I, R047K/T054L, T004S/S023W/G024W, M138L/E152F/T146S, D220P/S265N, T004S/G024M, T004V/S023N, N046Q/N050F/T054K, N046Q/N050Y/T054H, Q062H/S066Q/S129Q, T059W/S129Q, T059W/S129V, N050F/T054K, R047K/N050F/T054L, V190I/D220P/S265W, Nl 12I/T263H/A273H/S285R, T059W/S066N/S129V, T059W/S066Q/S129I, T059W/S129I, T263W/S285P, V190I/D220P, A289V/T263H/A273H, T263H/A273H/S285P, N90S/A273H/S285P, R047K/N050Y/T054L, T004S/S023N, T059R/S129Q, N046Q/R047K/T054H, T059W/S066Q/S129V, E152W/T179P, N050Y/S066Q/S129V, T202S/T263W/A273H, T263W/A273H/S285P, M138L/E152W/T179P, N046Q/R047K, N046Q/T054H/F176L, T004L/G024M, T004S/L282M, T263H/A273H, T263H/A273H/S285W, T004L/S023Y/G024M, L282F/Q286P, T004V/S023Y/G024Y, V190F/S265W, M138L/E152F, V190F/D220E/S265W, N046Q/N050F/T054H, N157Y/S285W, T004F/S023Y/G024M, T004V/S023N/G024M, L198I/D220E/S265Q, N046Q/N050Y/T054K/A154T, S016L/D220E/S265W, D220E/S265W, D220E/A237S/S265W, S066Q/S129Q, V190F/D220E/S265Q/T267I, L282M/F173Y/T219S,
E152F/T179P, V190I/S265W, M138L/S066Q, M138L/E152W,
T059W/S066Q/A070T/S129I, V190F/D220E/S265N, V190F/S265N, N046Q/N050Y, and M138L/E152F/T179P.
In yet further embodiments, the present invention provides isolated variant neutral metalloproteases, wherein the metalloproteases comprise multiple mutations selected from V190I/D220P, V190I/D220P/S265Q, V190L/D220E, V190I/D220E/S265Q, V190I/D220E/S265W/L282F, V190L/D220E/S265Q, V190I/D220E/S265W, V190L/D220E/S265N, T059R/S066Q/S129I, V190I/D220E/S265N, V190L/D220E/S265W, V190I/D220E, T059W/S066N/S129V, T059K/S066Q/S129V, T059K/Y082C/S129V, T059R/S066N/S129I, S066Q/S129V, T059R/S066Q/S129V, T059R/S129I, N050Y/T059W/S066N/S129V, D220P/S265N, S066Q/S129I, T059W/S066Q/S129V, T059K/S066Q/S129I, T059R/S129V, N050Y/S066Q/S129V, T059W/S066Q/S129I, N050Y/T059W/S066Q/S129V, T059K/S129I, D220P/S265W, F130L/M138L/T179P, S066N/S129I, T059R/S066N/S129V, F130I/M138L/T179P, T059R/S066Q/N092S/S129I, S066N/S129V, D220E/S265Q, F130L/M138L/E152W/T179P, T059W/S129V, S265P/L282M/Q286R/A289R, S265P/L282F/Q286R/A289R, T059W/S066N/S129I, V190I/D220P/S265W, F130L/E152W/T179P, F130L/M138L/E152F/T179P,
Q062K/S066Q/S129I, T059K/S066N/S129I, E152H/T179P, S265P/L282M/Q286K/A289R, F130L/M138L/E152H/T179P, T263W/A273H/S285R, D220E/S265N, F130I/M138L/E152H/T179P, F130V/M138L/E152W/T179P, F130IM138L/E152W/T179P, T059W/S129I, D220E/S265W, F130V/M138L/T179P, F130L/E152V/T179P, T059R/S129Q, T263W/S285P, F130I/M138L/E152F/T179P, E152W/T179P, V190L/S265Q, F130L/E152F/T179P, L282M/Q286R/A289R/P162S, D220P/S265Q, M138L/E152F/T179P, F130I/E152H/T179P, M138L/E152W/T179P, F130L/T179P,
F130L/M138L/E152W/T179P/Q286H, F130L/M138L/E152H, T263W/A273H/S285W, S265P/Q286K, T059W/S066Q/S129Q, T263W/S285R, T059W/S066N/S129Q, T263W/S285W, T059R/S066N/S 129Q, S265P/L282M/Q286R/A289R/T202S/K203N, T059W/S129Q, Q062H/S066Q/S129Q, L282M/Q286R/A289R, V190L/D220E/S265N/V291I, V190L/S265N, F130L/M138L/E152W, N050Y/T059R/S129Q, F130I/T179P, T059K/S066Q/S129Q, T059K/S129Q, S265P/L282M/Q286P/A289R, S265P/L282F/Q286P/A289R, T263W/A273H/S285P, S265P/L282M/Q286K, S016L/D220E/S265W, S066Q/S129Q, S265P/L282M/Q286P,
L282F/Q286R/A289R, F130V/E152W/T179P, L044Q/T263W/S285R L055F/T059W/S129V, V190L/S265W, Q286R/A289R,
G99D/S265P/L282F/Q286K/A289R, F130L/M138L/E152F, T059R/S066Q/S129Q, F130L/E152H, S066N/S129Q, T004S/S023N/G024M/K269N, S265P/L282M, E152F/T179P, T059W/S066N/S129V/S290R, L282F/Q286K/A289R, F130L/M138L, F130I/M138L/E152W, S265P/L282F, F130I/M138L/E152H, F130V/M138L/E152H, V190I/S265Q, M138L/E152M, S265P/L282F/Q286P, M138L/E152H, T059K/S066N/K088E, V190I/S265W, F130L/E152W, L282M/Q286K/A289R, L282M/Q286K/A289R/I253V, T263W/A273H, V190I/S265N, M138L/E152W, A273H/S285R, F130I/M138L, F130L/E152F, F130V/M138L/E152W, T059K/S066Q/V102A/S129Q, F130V/E152H/T179P, F130I/M138L/E152F, F130V/M138L/E152F, M138L/E152F, L282M/Q286R, F130I/E152H, S265P/L282F/A289R/T065S, T263H/A273H/S285R, F130V/M138L, T014M/T059R/S129V, L282M/Q286R/A289R/K1 IN, A273H/S285P, L282M/Q286K/A289R/S132T, T263H/A273H/S285W, F130V/E152W, S265P/L282F/Q286K/N061Y, F130LΕ152W, L198I/D220E/S265Q, V190I/S265L, T263H/S285W, S265P/L282F/A289R, M138L/S066Q, F130I/E152F, N90S/A273H/S285P, S032T/T263H/A273H/S285R, L282F/Q286P/A289R, N157Y/T263W/A273H/S285R, V105A/S129V, T263H/A273H/S285P, S129Q/L282H, T059W/S066Q, F130V/E152H, S023W/G024Y, T004V/S023N, T059R/S066Q, N050W/T054L, L282M/Q286P/A289R, A115V/V190L/S265W, L282M/Q286K, T059R/S066N, L282F/Q286P, T004V/S023W/G024M, S265P/L282F/Q286R/L78H, L282F/Q286K,
T004V/S023W/G024Y, S023W/G024M, T059R/R256S, F130V/E152F, T004V/G024W, N050W/T054K, S023Y/G024M, T004V/S023Y, T004V/S023Y/G024M, N050Y/T054H, S023W/G024W, T004V/S023Y/G024Y, T004V/S023N/G024W, F130L/M138L/E152F/T179P/V291I, N050Y/T059K/S066Q, T004V/S023Y/G024W, T059K/S066N, T004V/S023N/G024Y, S023Y/G024W, N050F/T054L, R047K/T054K, S023N/G024W, L282M/A289R, S023Y/G024Y, T004V/G024M, R047K/N050F/T054K, N050F/T054K, T059K/S066Q, S023N/G024M, S023N/G024Y, T004L/S023N, R047KVN050W/T054H, T004L/S023W/G024Y, T004S/S023W, N046Q/N050W/T054H/A142T, T004L/S023Y, T004V/S023W, N050W/T054H, T004S/S023N, T004S/L282M, T004L/S023W, N050F/T054H, N050Y/T054L, and R047K/N050W/T054K.
In yet further embodiments, the present invention provides isolated neutral metalloproteases comprising multiple mutations selected from S066Q/S129V, S066Q/S129I, N050Y/S066Q/S129V, S066N/S129I, T059K/S066Q/S129V, S066N/S129V, F130L/E152W/T179P, S265P/L282M/Q286R/A289R, F130L/E152V/T179P,
T059K/S066Q/S129I, T263W/S285P, T059K/S066N/S129I, T263W/A273H/S285P, S265P/L282F/Q286R/A289R, F130V/E152W/T179P, T263W/A273H/S285R, V190I/D220P/S265W, F130L/E152H, S066N/S129Q, S265P/L282M/Q286K/A289R, V190I/D220E, T059R/S066N/S129I, V190I/D220E/S265W, T059K/S129I, T059R/S066Q/S129I, F130I/M138L/E152H/T179P, F130I/T179P, T263W/A273H/S285W, S016L/D220E/S265W, S066Q/S129Q, V190I/D220E/S265Q, T059R/S066Q/S129V, D220E/S265N, V 190L/D220E, D220E/S265 W, V 190I/D220P, V 190L/D220E/S265N, L044Q/T263W/S285R, S265P/L282M/Q286P/A289R, F130L/M138L/E152H/T179P, T263W/S285R, L282M/Q286R/A289R, T263W/S285W, F130I/E152H/T179P, V190I/D220E/S265N, V190L/D220E/S265W, V190I/D220P/S265Q, T059R/S066N/S129V, V190L/D220E/S265Q, E152H/T179P, F130L/M138L/E152F/T179P, Q062H/S066Q/S129Q, T059R/S129V, V190LD220E/S265W/L282F, V190I/S265Q, F130L/E152F/T179P, D220E/S265Q, E152W/T179P, T059K/S066Q/S129Q, F130L/M138L/T179P, F130IM138L/E152F/T179P, F130L/M138L/E152W/T179P, N050Y/T059W/S066Q/S129V, S265P/L282M/Q286K, T059R/S129I, F130V/E152H/T179P, D220P/S265N, S265P/L282M/Q286P, F130I/E152H, T059R/S066Q/N092S/S129I, F130L/T179P, G99D/S265P/L282F/Q286K/A289R, T263W/A273H, V190I/S265N, D220P/S265W,
F130L/E152W, F130L/M138L/E152H, S265P/L282M, V190I/S265Q, F130L/E152F, T059K/S129Q, Q286R/A289R, M138L/E152W/T179P, F130I7M138L/E152H, D220P/S265Q, V190L/S265N, F13017M138L/E152W, S265P/Q286K, V190L/S265Q, V190I/S265W, F130L/M138L/E152F, F130V/E152H, E152F/T179P, N050Y/T059W/S066N/S129V, T059R/S066N/S129Q, F130I/E152W, F130V/E152W, T059R/S066Q/S129Q, T263H/A273H/S285P, N90S/A273H/S285P,
V190L/D220E/S265N/V291I, T059R/S129Q, A273H/S285P, F130I/M138L/E152W/T179P, F130V/M138L/E152F, N050Y/T059R/S129Q, T059W/S066Q/S129I, F130V/M138L/T179P, F130V/M138L/E152W/T179P, V190L/S265W, F130V/M138L/E152W, T059W/S066Q/S129V, V190FS265Q, F130V/M138L/E152H, F130I/E152F, N157Y/T263W/A273H/S285R, T263H/S285W, M138L/E152F/T179P, A115V/V190L/S265W, M138L/E152M, T263H/A273H/S285W, F130L/M138L/E152W, T059K/S066N/K088E, F130I/M138L/E152F, F130I/M138L/T179P, T004V/S023N, T059K/S066Q/V102A/S129Q, F130L/M138L, N047K/N050F/T054K, T263H/A273H/S285R, F130L/M138L/E152W/T179P/Q286H, M138L/E152H, M138L/S066Q, L282M/Q286R/A289R/P162S, L282F/Q286R/A289R, Q062K/S066Q/S129I, A273H/S285R, S265P/L282F/Q286P, S265P/L282F/Q286P/A289R, S265P/L282M/Q286R/A289R/T202S/K203N, T059W/S066N/S129I, V190I/S265L, T059W/S066N/S129V, F13017M138L, L282M/Q286K/A289R/I253V, R047K/N050F/T054K, M138L/E152F, N050W/T054K, L198LD220E/S265Q, L282F/Q286K/A289R, N050F/T054K, L282M/Q286R, M138L/E152W, S265P/L282F, F130V/E152F, T059W/S066N/S129Q, F130V/M138L, T263H/A273H,
L282M/Q286K/A289R, N046Q/N050W/T054H/A142T, T059W/S066Q/S129Q, S265P/L282F/A289R/T065S, N050F/T054H, S129Q/L282H, L282M/Q286K/A289R/S132T, L282M/Q286R/A289R/K11N, T059K/S066N, R047K/N050W/T054K, T059K/S066Q, T004V/S023Y, T059W/S066N/S129V/S290R, N050Y/T059K/S066Q, and R047K/N050Y. The present invention also provides isolated polynucleotides comprising a nucleotide sequence (i) having at least 70% identity to SEQ ID NOS: 1, 2, 12 and/or 13, or (ii) being capable of hybridizing to a probe derived from any of the nucleotide sequence set forth herein, including the primer sequences provided in the Examples, under conditions of intermediate to high stringency, or (iii) being complementary to the nucleotide sequence set forth in SEQ ID NOS: 1, 2, 12, and/or 13. In some embodiments, the present invention provides expression vectors encoding at least one such polynucleotide. In further embodiments, the present invention provides host cells comprising these expression vectors. In some particularly preferred embodiments, the host cells are Bacillus sp. The present invention also provides the neutral metalloproteases produced by the host cells. In further embodiments, the present invention provides polynucleotides that are complementary to at least a portion of the sequence set forth in SEQ ID NOS: 1, 2, 12, and/or 13.
The present invention also provides methods of producing an enzyme having neutral metalloprotease activity, comprising: transforming a host cell with an expression vector comprising a polynucleotide having at least 70% sequence identity to SEQ ID NO:1, 2, 12 and/or 13; cultivating the transformed host cell under conditions suitable for the host cell. In some preferred embodiments, the host cell is a Bacillus species.
The present invention also provides probes comprising 4 to 150 nucleotide sequence substantially identical to a corresponding fragment of SEQ ID NOS: 1, 2, 12, and/or 13, wherein the probe is used to detect a nucleic acid sequence coding for an enzyme having metalloproteolytic activity. In some embodiments, the nucleic acid sequence is obtained from a Bacillus sp. The present invention also provides cleaning compositions comprising at least one neutral metalloprotease obtained from a Bacillus sp. In some embodiments, at least one neutral metalloprotease is obtained from B. amyloliquefaciens. In some particularly preferred embodiments, at least one neutral metalloprotease comprises the amino acid sequence set forth in SEQ ID NOS:3, 4, and/or 18. In some further embodiments, the present invention provides isolated neutral metalloproteases comprising at least 45% amino acid identity with neutral metalloprotease comprising SEQ ID NOS:3, 4 and/or 18. In some embodiments, the isolated neutral metalloproteases comprise at least 50% identity, preferably at least 55%, more preferably at least 60%, yet more preferably at least 65%, even more preferably at least 70%, more preferably at least 75%, still more preferably at least 80%, more preferably 85%, yet more preferably 90%, even more preferably at least 95%, and most preferably 99% identity with SEQ ID NOS:3, 4, and/or 18.
The present invention further provides cleaning compositions comprising at least one neutral metalloprotease, wherein at least one of the neutral metalloproteases has immunological cross-reactivity with the neutral metalloprotease obtained from a Bacillus sp.
In some preferred embodiments, the neutral metalloproteases have immunological cross- reactivity with neutral metalloprotease obtained from B. amyloliquefaciens. In alternative embodiments, the neutral metalloproteases have immunological cross-reactivity with neutral metalloprotease comprising the amino acid sequence set forth in SEQ ID NOS:3, 4 and/or 18. In still further embodiments, the neutral metalloproteases have cross-reactivity with fragments {i.e., portions) of a Bacillus sp. neutral metalloprotease and/or the neutral metalloprotease comprising the amino acid sequence set forth in SEQ ID NOS :3, 4, and/or 18. The present invention further provides cleaning compositions comprising at least one neutral metalloprotease, wherein the neutral metalloprotease is a variant neutral metalloprotease having an amino acid sequence comprising at least one substitution of an amino acid made at a position equivalent to a position in a Bacillus sp. neutral metalloprotease having an amino acid sequence set forth in SEQ ID NOS:3, 4 and/or 18, particularly B. amyloliquefaciens neutral metalloprotease. In some particularly preferred embodiments, the present invention also provides cleaning compositions comprising at least one neutral metalloprotease, wherein the neutral metalloprotease is a variant neutral metalloprotease having an amino acid sequence comprising at least one substitution of an amino acid made at a position equivalent to a position in a Bacillus sp. neutral metalloprotease having an amino acid sequence set forth in SEQ ID NO: 18, particularly B. amyloliquefaciens neutral metalloprotease.
In yet additional embodiments, the cleaning compositions contain at least one neutral metalloprotease comprising a set of mutations in SEQ ID NOS:3, 4 and/or 18. In some particularly preferred embodiments, the variant neutral metalloproteases comprise at least one substitution corresponding to the amino acid positions in SEQ ID NOS:3, 4, and/or 18, and wherein the variant neutral metalloproteases have better performance in at least one property, as compared to wild-type B. amyloliquefaciens neutral metalloprotease.
The present invention also provides cleaning compositions comprising a cleaning effective amount of at least one metalloproteolytic enzyme, the enzyme comprising an amino acid sequence having at least 70 % sequence identity to SEQ ID NOS:3, 4, and/or 18, and a suitable cleaning formulation. In some preferred embodiments, the cleaning compositions further comprise one or more additional enzymes or enzyme derivatives selected from the group consisting of proteases, amylases, lipases, mannanases, pectinases, cutinases, oxidoreductases, hemicellulases, and cellulases.
The present invention also provides compositions comprising at least one neutral metalloprotease obtained from a Bacillus sp., in particular B. amyloliquefaciens, wherein the compositions further comprise at least one stabilizer. In some embodiments, the stabilizer is selected from borax, glycerol, zinc ions, calcium ions, and calcium formate. In some embodiments, the present invention provides competitive inhibitors suitable to stabilize the enzyme of the present invention to anionic surfactants. In some embodiments, at least one neutral metalloprotease is obtained from a Bacillus sp. In some particularly preferred embodiments, the at least one neutral metalloprotease is obtained from B. amyloliquefaciens. In some particularly preferred embodiments, the at least one neutral metalloprotease comprises the amino acid sequence set forth in SEQ ID NOS:3, 4, and/or 18.
The present invention further provides compositions comprising at least one neutral metalloprotease obtained from a Bacillus sp., wherein the neutral metalloprotease is an autolytically stable variant. In some embodiments, at least one variant neutral metalloprotease is obtained from B. amyloliquefaciens. In some particularly preferred embodiments, the at least one variant neutral metalloprotease comprises the amino acid sequence set forth in SEQ ID NOS:3, 4, and/or 18. The present invention also provides cleaning compositions comprising at least 0.0001 weight percent of the neutral metalloprotease of the present invention, and optionally, an adjunct ingredient. In some embodiments, the composition comprises an adjunct ingredient. In some preferred embodiments, the composition comprises a sufficient amount of a pH modifier to provide the composition with a neat pH of from about 3 to about 5, the composition being essentially free of materials that hydrolyze at a pH of from about 3 to about 5. In some particularly preferred embodiments, the materials that hydrolyze comprise a surfactant material. In additional embodiments, the cleaning composition is a liquid composition, while in other embodiments, the cleaning composition is a solid composition and in still further embodiments, the cleaning composition is a gel. Indeed, it is not intended that the present invention be limited to any particular formulation and/or composition, as various formulations and/or compositions find use in the present invention. In further embodiments, the surfactant material comprises a sodium alkyl sulfate surfactant that comprises an ethylene oxide moiety. The present invention additionally provides cleaning compositions that in addition to at least one neutral metalloprotease of the present invention, further comprise at least one acid stable enzyme, the cleaning composition comprising a sufficient amount of a pH modifier to provide the composition with a neat pH of from about 3 to about 5, the composition being essentially free of materials that hydrolyze at a pH of from about 3 to about 5. In further embodiments, the materials that hydrolyze comprise a surfactant material. In some preferred embodiments, the cleaning composition being a liquid composition. In yet additional embodiments, the surfactant material comprises a sodium alkyl sulfate surfactant that comprises an ethylene oxide moiety. In some embodiments, the cleaning composition comprises a suitable adjunct ingredient. In some additional embodiments, the composition comprises a suitable adjunct ingredient. In some preferred embodiments, the composition comprises from about 0.001 to about 0.5 weight % of neutral metalloprotease,
In some alternatively preferred embodiments, the composition comprises from about 0.01 to about 0.1 weight percent of neutral metalloprotease.
The present invention also provides methods of cleaning, the comprising the steps of: a) contacting a surface and/or an article comprising a fabric with the cleaning composition comprising the neutral metalloprotease of the present invention at an appropriate concentration; and b) optionally washing and/or rinsing the surface or material. In alternative embodiments, any suitable composition provided herein finds use in these methods. In some embodiments, the fabric comprises at least one grass stain. In some particularly preferred embodiments, the cleaning compositions of the present invention find use in removing grass and other stains from fabrics. The present invention also provides animal feed comprising at least one neutral metalloprotease obtained from a Bacillus sp. In some embodiments, at least one neutral metalloprotease is obtained from B. amyloliquefaciens. In some particularly preferred embodiments, at least one neutral metalloprotease comprises the amino acid sequence set forth in SEQ ID NOS:3, 4 or 18. In some alternative particularly preferred embodiments, at least one neutral metalloprotease comprises the amino acid sequence set forth in SEQ 3D NO: 18.
The present invention provides an isolated polypeptide having metalloproteolytic activity, (e.g., a neutral metalloprotease) having the amino acid sequence set forth in SEQ ID NO: 18. In some embodiments, the present invention provides isolated polypeptides having approximately 40% to 98% identity with the sequence set forth in SEQ ID NO:18. In some preferred embodiments, the polypeptides have approximately 50% to 95% identity with the sequence set forth in SEQ ID NO: 18. In some additional preferred embodiments, the polypeptides have approximately 60% to 90% identity with the sequence set forth in SEQ ID NO: 18. In yet additional embodiments, the polypeptides have approximately 65% to 85% identity with the sequence set forth in SEQ ID NOS:3, 4, or 18. In some particularly preferred embodiments, the polypeptides have approximately 90% to 95% identity with the sequence set forth in SEQ ID NOS:3, 4, or 18.
The present invention further provides isolated polynucleotides that encode neutral metalloproteases comprise an amino acid sequence comprising at least 40% amino acid sequence identity to SEQ ID NOS:3, 4, or 18. In some embodiments, the neutral metalloproteases have at least 50% amino acid sequence identity to SEQ ID NOS:3, 4 and/or 18. In some embodiments, the neutral metalloproteases have at least 60Ψo amino acid sequence identity to SEQ ID NOS:3, 4 or 18. In some embodiments, the neutral metalloproteases have at least 70% amino acid sequence identity to SEQ ID NOS:3, 4 or 18. In some embodiments, the neutral metalloproteases have at least 80% amino acid sequence identity to SEQ ID NOS:3, 4 or 18. In some embodiments, the neutral metalloproteases have at least 90% amino acid sequence identity to SEQ ID NOS:3, 4 or 18. In some embodiments, the neutral metalloproteases have at least 95% amino acid sequence identity to SEQ ID NO:3, 4 or 18. The present invention also provides expression vectors comprising any of the polynucleotides provided above.
The present invention further provides host cells transformed with the expression vectors of the present invention, such that at least one neutral metalloprotease is expressed by the host cells. In some embodiments, the host cells are bacteria, while in other embodiments, the host cells are fungi.
The present invention also provides isolated polynucleotides comprising a nucleotide sequence (i) having at least 70% identity to SEQ ID NO:1, 2, 12 and/or 13, or (ii) being capable of hybridizing to a probe derived from the nucleotide sequence of SEQ ID NO: 1 , 2,
12, and/or 13, under conditions of medium to high stringency, or (iii) being complementary to the nucleotide sequence of SEQ ID NO:1, 2, 12, and/or 13. In some embodiments, the present invention provides vectors comprising such polynucleotide. In further embodiments, the present invention provides host cells transformed with such vectors. The present invention further provides methods for producing at least one enzyme having neutral metalloprotease activity, comprising: the steps of transforming a host cell with an expression vector comprising a polynucleotide comprising at least 70% sequence identity to SEQ ID NO:1, 2, 12, and/or 13, cultivating the transformed host cell under conditions suitable for the host cell to produce the neutral metalloprotease; and recovering the neutral metalloprotease. In some preferred embodiments, the host cell is a Bacillus sp, while in some alternative embodiments, the host cell is B. ωnyloliquefaciens.
The present invention also provides fragments {i.e., portions) of the DNA encoding the neutral metalloproteases provided herein. These fragments find use in obtaining partial length DNA fragments capable of being used to isolate or identify polynucleotides encoding mature neutral metalloprotease enzyme described herein from B. amyloliquefaciens , or a segment thereof having proteolytic activity. In some embodiments, portions of the DNA provided in SEQ ID NO:2 find use in obtaining homologous fragments of DNA from other species which encode a neutral metalloprotease or portion thereof having metalloproteolytic activity. The present invention further provides at least one probe comprising a polynucleotide substantially identical to a fragment of SEQ ID NOS:1, 2, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, and/or any primer sequence set forth herein, wherein the probe is used to detect a nucleic acid sequence coding for an enzyme having metalloproteolytic activity, and wherein the nucleic acid sequence is obtained from a bacterial source. In some embodiments, the bacteria] source is a Bacillus sp. In some preferred embodiments, the bacterial source is B. amyloliquefaciens. The present invention further provides compositions comprising at least one of the neutral metalloproteases provided herein. In some preferred embodiments, the compositions are cleaning compositions. In some embodiments, the present invention provides cleaning compositions comprising a cleaning effective amount of at least one neutral metal! oprotease comprising an amino acid sequence having at least 40% sequence identity to SEQ ID NO: 18 at least 90% sequence identity to SEQ ID NO:18, and/or having an amino acid sequence of SEQ ID NO: 18. In some embodiments, the cleaning compositions further comprise at least one suitable cleaning adjunct. In some embodiments, the neutral metalloprotease is derived from a Bacillus sp. In some preferred embodiments, the Bacillus sp., is B. amyloliquefaciens. In still further embodiments, the cleaning composition further comprises at least one additional enzymes or enzyme derivatives selected from the group consisting of proteases, amylases, lipases, mannanases, and cellulases.
The present invention also provides isolated naturally occurring neutral metalloproteases comprising an amino acid sequence having at least 45% sequence identity to SEQ ID NO: 18, at least 60% sequence identity to SEQ ID NO: 18, at least 75% sequence identity to SEQ ID NO:18, at least 90% sequence identity to SEQ ID NO:18, at least 95% sequence identity to SEQ ID NO:18, and/or having the sequence SEQ ID NO:18, the neutral metalloprotease being isolated from a Bacillus sp. In some embodiments, the neutral metalloprotease is isolated from B. amyloliquefaciens.
In additional embodiments, the present invention provides engineered variants of the neutral metalloproteases of the present invention. In some embodiments, the engineered variants are genetically modified using recombinant DNA technologies, while in other embodiments, the variants are naturally occurring. The present invention further encompasses engineered variants of homologous enzymes, as well as isolated enzyme homologs. In some embodiments, the engineered variant homologous neutral metalloproteases are genetically modified using recombinant DNA technologies, while in other embodiments, the variant homologous neutral metalloproteases are naturally occurring. The present invention also provides methods for producing neutral metalloproteases, comprising: (a) transforming a host cell with an expression vector comprising a polynucleotide having at least 70% sequence identity to SEQ ID NO:2, at least 95% sequence identity to SEQ ID NO:2, and/or having a polynucleotide sequence of SEQ ID NO:2; (b) cultivating the transformed host cell under conditions suitable for the host cell to produce the neutral metalloprotease; and (c) recovering the neutral metalloprotease. In some embodiments, the host cell is a Bacillus species (e.g., B. subtilis, B. clausii, or B. lichenifonnis). In alternative embodiments, the host cell is a B. amyloliquefaciens
In further embodiments, the present invention provides means to produce host cells that are capable of producing the neutral metalloproteases of the present invention in relatively large quantities. In particularly preferred embodiments, the present invention provides means to produce neutral metalloprotease with various commercial applications where degradation or synthesis of polypeptides are desired, including cleaning compositions, as well as food and/or feed components, textile processing, leather finishing, grain processing, meat processing, cleaning, preparation of protein hydrolysates, digestive aids, microbicidal compositions, bacteriostatic compositions, fungistatic compositions, personal care products {e.g., oral care, hair care, and/or skin care).
The present invention also provides variant neutral metalloproteases having improved performance as compared to wild-type B. amyloliquefaciens neutral metalloprotease. In some preferred embodiments, the improved performance comprises improved thermostability, as compared to wild-type B. amyloliquefaciens neutral metalloprotease. In alternative preferred embodiments, the improved performance comprises improved performance under lower or higher pH conditions, as compared to wild-type B. amyloliquefaciens neutral metalloprotease. In additional preferred embodiments, the improved performance comprises improved autolytic stability, as compared to wild-type B. amyloliquefaciens neutral metalloprotease. In some particularly preferred embodiments, the enzyme compositions of the present invention have comparable or improved wash performance, as compared to presently used neutral metalloproteases. Other objects and advantages of the present invention are apparent herein. DESCRIPTION OF THE FIGURES
Figure 1 provides a graph showing the results from the determination of the affinity constants of purified MULTTFECT® neutral binding protein for zinc and calcium cations using the fluorescent dyes Fluo-Zn3 and Fluo-3, respectively. Figure 2 provides a graph showing inhibition of protease activity of 0.36 mg/ml formulated recombinant B. amyloliquefaciens nprE by Linear Alkylbenzene Sulfonate (LAS) assayed using the QuantiCleave™ protease assay.
Figure 3 provides a sequence alignment of various metalloprotease homologues (SEQ TD NOS:173-181) that find use in the present invention.. Figure 4 provides a sequence alignment of various metalloprotease homologues
(SEQ ID NOS:182-191) that find use in the present invention. In this Figure, the numbering is for thermolysin (B. thennoproteolyticus). As in Figure 3, the "*" indicates conserved residues, ":" indicates conservatively replaced residues, and "." indicates similar residues.
Figure 5 provides a sequence alignment of various metalloprotease homologues (SEQ ID NOS: 192-195) identified through homology modeling.
Figure 6 provides a map of plasmid pJ4:GO1905.
Figure 7 provides a map of plasmid pJ4: GOl 906.
Figure 8 provides a map of plasmid pJ4:G01907.
Figure 9 provides a map of plasmid pJ4:G01908. Figure 10 provides a map of plasmid pJ4:G01909.
Figure 11 provides a map of plasmid pJ4:G01938.
Figure 12 provides a map of plasmid pJHT.
Figure 13 provides a map of plasmid pAC.
Figure 14 provides a map of pUBnprE. Figure 15 provides a schematic showing the amplification of the aprE promoter and
B. subtilis nprE gene fragments.
Figure 16 provides a map of plasmid pEL501.
Figure 17 provides a schematic showing the amplification of the aprE promoter and B. subtilis nprB gene fragments. — Figure 18 provides a map of plasmid pEL5O8.
Figure 19 provides a schematic showing the amplification of the aprE promoter and B. stearothennophilus nprT gene fragments, used in the production of strain EL560. Figure 20 provides a diagram showing the construction of strain EL560.
Figure 21 provides a schematic showing the amplification of the aprE promoter and B. caldolyticus npr gene fragments, used in the production of strain EL561.
Figure 22 provides a diagram showing the construction of strain EL561. Figure 23 provides a schematic showing the amplification of the aprE promoter and
B. thuringiensis nprB gene fragments.
Figure 24 provides a map of plasmid pEL568.
Figure 25 provides a graph showing results from experiments designed to determine the long-term storage of 0.36 mg/ml UF concentrate of neutral metalloprotease (nprE) in TIDE® 2005 base in the presence of zinc and calcium ions at 32 0C. For comparative purposes, results obtained for testing without salt and excess calcium are provided.
Figure 26 provides wash performance test data using Terg-O-Tometer (TOM) and varying soiled substrates. Panel A provides results showing the delta soil removal (%) of subtilisin (BPN' Y217L) and purified MULTIFECT® Neutral on EMPA 116 (fixed and unfixed on cotton) after washing at 15°C in TIDE®-2005 detergent liquid. Panel B provides results showing the delta soil removal (%) of subtilisin (BPN' Y217L) and purified MULTIFECT® Neutral on Equest® grass medium soiled on cotton after washing at 150C in TIDE®-2005 detergent liquid. Panel C provides results showing the delta soil removal (%) of subtilisin (BPN' Y217L) and purified MULTIFECT® Neutral on CFT C-10 (pigment, oil, milk on cotton) after washing at 15°C in TIDE®-2005 detergent liquid.
Figure 27 provides a graph showing the results of DSC scans for 440 ppm NprE and variants obtained using the VP-Cap DSC (MicroCal™).
Figure 28 provides a graph showing the results for DSC scans for 440 ppm NprE and variants in the presence of 130 nϋvl citrate were obtained using the VP-Cap DSC (MicroCal™).
Figure 29 provides a graph showing the thermal melting points for 440 ppm NprE in the presence of various additives and obtained using the VP-Cap DSC (MicroCal™). In this Figure, the horizontal line represents the Tm for wild-type NprE with no additives.
Figure 30 provides a graph showing the remaining activity of nprE and nprE homologs in 25% TIDE® at 25°C, after 90 minutes.
Figure 31 provides a graph showing the BMI wash performance of nprE and nprE homologs. Figure 32 provides a graph showing the results of NprE stability measurements in various formulation mixes.
Figure 33 provides graphs (Panels A, B and C showing the rate of NprE inactivation with different % DTPA concentrations at a fixed calcium formate concentration. Figure 34 provides graphs (Panels A, B and C) showing the DOE analysis software generated prediction profiles of a DTPA and calcium formate composition based on response goal (decay rate).
Figure 35 provides the amino acid sequences (SEQ ID NOS:222-226) for the citrate- induced autolytic fragments of NprE highlighting the autolysis sites. Fragment 1 and 2 are the first clip, Fragment 3-5 represent the second clip. The italicized letters represent the sequenced N-termini and bold letters highlight the peptides that were identified from the in- gel digestion of the respective fragments.
DESCRIPTION OF THE INVENTION
The present invention provides methods and compositions comprising at least one neutral metalloprotease enzyme that has improved storage stability. In some embodiments, the neutral metalloprotease finds use in cleaning and other applications. In some particularly preferred embodiments, the present invention provides methods and compositions comprising neutral metalloprotease(s) obtained from Bacillus sp. In some more particularly preferred embodiments, the neutral metalloprotease is obtained from B. amyloliquefaciens. In still further preferred embodiments, the neutral metalloprotease is a variant of the B. amyloliquefaciens neutral metalloprotease. In yet additional embodiments, the neutral metalloprotease is a homolog of the the B. amyloliquefaciens neutral metalloprotease. The present invention finds particular use in applications including, but not limited to cleaning, bleaching and disinfecting.
Unless otherwise indicated, the practice of the present invention involves conventional techniques commonly used in molecular biology, microbiology, protein purification, protein engineering, protein and DNA sequencing, and recombinant DNA fields, which are within the skill of the art. Such techniques are known to those of skill in the art and are described in numerous texts and reference works (See e.g., Sambrook et ah, "Molecular Cloning: A Laboratory Manual", Second Edition (Cold Spring Harbor), [1989]); and Ausubel et ah, "Current Protocols in Molecular Biology" [1987J). All patents, patent applications, articles and publications mentioned herein, both supra and infra, are hereby expressly incorporated herein by reference.
Furthermore, the headings provided herein are not limitations of the various aspects or embodiments of the invention which can be had by reference to the specification as a whole. Accordingly, the terms defined immediately below are more fully defined by reference to the specification as a whole. Nonetheless, in order to facilitate understanding of the invention, a number of terms are defined below.
Definitions
Unless defined otherwise herein, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. For example, Singleton and Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d Ed., John Wiley and Sons, NY (1994); and Hale and Marham, The Harper Collins Dictionary of Biology, Harper Perennial, NY (1991) provide those of skill in the art with a general dictionaries of many of the terms used herein. Although any methods and materials similar or equivalent to those described herein find use in the practice of the present invention, the preferred methods and materials are described herein. Accordingly, the terms defined immediately below are more fully described by reference to the Specification as a whole. Also, as used herein, the singular terms "a," "an," and "the" include the plural reference unless the context clearly indicates otherwise. Unless otherwise indicated, nucleic acids are written left to right in 5' to 3' orientation; amino acid sequences are written left to right in amino to carboxy orientation, respectively. It is to be understood that this invention is not limited to the particular methodology, protocols, and reagents described, as these may vary, depending upon the context they are used by those of skill in the art.
It is intended that every maximum numerical limitation given throughout this specification includes every lower numerical limitation, as if such lower numerical limitations were expressly written herein. Every minimum numerical limitation given throughout this specification will include every higher numerical limitation, as if such higher numerical limitations were expressly written herein. Every numerical range given throughout this specification will include every narrower numerical range that falls within such broader numerical range, as if such narrower numerical ranges were all expressly written herein.
All documents cited are, in relevant part, incorporated herein by reference; the citation of any document is not to be construed as an admission that it is prior art with respect to the present invention.
As used herein, the term "bleaching" refers to the treatment of a material (e.g., fabric, laundry, pulp, etc.) or surface for a sufficient length of time and under appropriate pH and temperature conditions to effect a brightening (i.e., whitening) and/or cleaning of the material. Examples of chemicals suitable for bleaching include but are not limited to CIO2, H2O2, peracids, NO2, etc.
As used herein, the term "disinfecting" refers to the removal of contaminants from the surfaces, as well as the inhibition or killing of microbes on the surfaces of items. It is not intended that the present invention be limited to any particular surface, item, or contaminant(s) or microbes to be removed. As used herein, the term "multimer" refers to two or more proteins or peptides that are covalently or non-covalently associated and exist as a complex in solution. A "dimer" is a multimer that contains two proteins or peptides; a "trimer" contains three proteins or peptides, etc. As used herein, "octamer" refers to a multimer of eight proteins or peptides.
As used herein, "personal care products" means products used in the cleaning, bleaching and/or disinfecting of hair, skin, scalp, and teeth, including, but not limited to shampoos, body lotions, shower gels, topical moisturizers, toothpaste, and/or other topical cleansers. In some particularly preferred embodiments, these products are utilized on humans, while in other embodiments, these products find use with non-human animals (e.g., in veterinary applications). As used herein, "cleaning compositions" and "cleaning formulations," unless otherwise indicated, refer to compositions that find use in the removal of undesired compounds from items to be cleaned, such as fabric, dishes, contact lenses, other solid substrates, hair (shampoos), skin (soaps and creams), teeth (mouthwashes, toothpastes) etc. The term encompasses any materials/compounds selected for the particular type of cleaning . composition desired and the form of the product (e.g., liquid, gel, granule, or spray composition), as long as the composition is compatible with the neutral metalloprotease and other enzyme(s) used in the composition. The specific selection of cleaning composition materials are readily made by considering the surface, item or fabric to be cleaned, and the desired form of the composition for the cleaning conditions during use.
The terms further refer to any composition that is suited for cleaning, bleaching, disinfecting, and/or sterilizing any object and/or surface. It is intended that the terms include, but are not limited to detergent compositions (e.g., liquid and/or solid laundry detergents and fine fabric detergents; hard surface cleaning formulations, such as for glass, wood, ceramic and metal counter tops and windows; carpet cleaners; oven cleaners; fabric fresheners; fabric softeners; and textile and laundry pre-spotters, as well as dish detergents).
Indeed, the term "cleaning composition" as used herein, includes unless otherwise indicated, granular or powder-form all-purpose or heavy-duty washing agents, especially cleaning detergents; liquid, gel or paste-form all-purpose washing agents, especially the so- called heavy-duty liquid (HDL) types; liquid fine-fabric detergents; hand dishwashing agents or light duty dishwashing agents, especially those of the high-foaming type; machine dishwashing agents, including the various tablet, granular, liquid and rinse-aid types for household and institutional use; liquid cleaning and disinfecting agents, including antibacterial hand-wash types, cleaning bars, mouthwashes, denture cleaners, car or carpet shampoos, bathroom cleaners; hair shampoos and hair-rinses; shower gels and foam baths and metal cleaners; as well as cleaning auxiliaries such as bleach additives and "stain-stick" or pre-treat types. As used herein, the terms "detergent composition" and "detergent formulation" are used in reference to mixtures which are intended for use in a wash medium for the cleaning of soiled objects. In some preferred embodiments, the term is used in reference to laundering fabrics and/or garments (e.g., "laundry detergents"). In alternative embodiments, the term refers to other detergents, such as those used to clean dishes, cutlery, etc. (e.g., "dishwashing detergents"). It is not intended that the present invention be limited to any particular detergent formulation or composition. Indeed, it is intended that in addition to neutral metalloprotease, the term encompasses detergents that contain surfactants, transferase(s), hydrolytic enzymes, oxido reductases, builders, bleaching agents, bleach activators, bluing agents and fluorescent dyes, caking inhibitors, masking agents, enzyme activators, antioxidants, and solubilizers.
As used herein, "Applicant Enzyme" refers to the neutral metalloproteases of the present invention. As used herein, "enhanced performance" in a detergent is defined as increasing cleaning of bleach-sensitive stains (e.g., grass, tea, wine, blood, dingy, etc.), as determined by usual evaluation after a standard wash cycle. In particular embodiments, the neutral metalloprotease of the present invention provides enhanced performance in the removal of colored stains and soils. In further embodiments, the enzyme of the present invention provides enhanced performance in the removal and/or decolorization of stains.
As used herein the term "hard surface cleaning composition," refers to detergent compositions for cleaning hard surfaces such as floors, walls, tile, bath and kitchen fixtures, and the like. Such compositions are provided in any form, including but not limited to solids, liquids, emulsions, etc.
As used herein, "dishwashing composition" refers to all forms for compositions for cleaning dishes, including but not limited to granular and liquid forms.
As used herein, "fabric cleaning composition" refers to all forms of detergent compositions for cleaning fabrics, including but not limited to, granular, liquid and bar forms.
As used herein, "textile" refers to woven fabrics, as well as staple fibers and filaments suitable for conversion to or use as yarns, woven, knit, and non-woven fabrics. The term encompasses yarns made from natural, as well as synthetic (e.g., manufactured) fibers.
As used herein, "textile materials" is a general term for fibers, yarn intermediates, yarn, fabrics, and products made from fabrics (e.g., garments and other articles).
As used herein, "fabric" encompasses any textile material. Thus, it is intended that the term encompass garments, as well as fabrics, yarns, fibers, non-woven materials, natural materials, synthetic materials, and any other textile material.
As used herein, the term "compatible," means that the cleaning composition materials do not reduce the enzymatic activity of the neutral metalloprotease to such an extent that the neutral metalloprotease is not effective as desired during normal use situations. Specific cleaning composition materials are exemplified in detail hereinafter.
As used herein, "effective amount of enzyme" refers to the quantity of enzyme necessary to achieve the enzymatic activity required in the specific application (e.g., personal care product, cleaning composition, etc.). Such effective amounts are readily ascertained by one of ordinary skill in the art and are based on many factors, such as the particular enzyme variant used, the cleaning application, the specific composition of the cleaning composition, and whether a liquid or dry (e.g., granular, bar) composition is required, and the like.
As used herein, "non-fabric cleaning compositions" encompass hard surface cleaning compositions, dishwashing compositions, personal care cleaning compositions (e.g., oral cleaning compositions, denture cleaning compositions, personal cleansing compositions, etc.), and compositions suitable for use in the pulp and paper industry.
As used herein, "oral cleaning compositions" refers to dentifrices, toothpastes, toothgels, toothpowders, mouthwashes, mouth sprays, mouth gels, chewing gums, lozenges, sachets, tablets, biogels, prophylaxis pastes, dental treatment solutions, and the like. As used herein, the term "transferase" refers to an enzyme that catalyzes the transfer of functional compounds to a range of substrates.
As used herein, "leaving group" refers to the nucleophile which is cleaved from the acyl donor upon substitution by another nucleophile.
As used herein, the term "enzymatic conversion" refers to the modification of a substrate to an intermediate or the modification of an intermediate to an end-product by contacting the substrate or intermediate with an enzyme. In some embodiments, contact is made by directly exposing the substrate or intermediate to the appropriate enzyme. In other embodiments, contacting comprises exposing the substrate or intermediate to an organism that expresses and/or excretes the enzyme, and/or metabolizes the desired substrate and/or intermediate to the desired intermediate and/or end-product, respectively.
As used herein, the phrase "detergent stability" refers to the stability of a detergent composition. In some embodiments, the stability is assessed during the use of the detergent, while in other embodiments, the term refers to the stability of a detergent composition during storage. As used herein, the phrase, "stability to proteolysis" refers to the ability of a protein
(e.g., an enzyme) to withstand proteolysis. It is not intended that the term be limited to the use of any particular protease to assess the stability of a protein.
As used herein, "oxidative stability" refers to the ability of a protein to function under oxidative conditions. In particular, the term refers to the ability of a protein to function in the presence of various concentrations of H2O2 and/or peracid. Stability under various oxidative conditions can be measured either by standard procedures known to those in the art and/or by the methods described herein. A substantial change in oxidative stability is evidenced by at least about a 5% or greater increase or decrease (in most embodiments, it is preferably an increase) in the half-life of the enzymatic activity, as compared to the enzymatic activity present in the absence of oxidative compounds.
As used herein, "pH stability" refers to the ability of a protein to function at a particular pH. In general, most enzymes have a finite pH range at which they will function. In addition to enzymes that function in mid-range pHs {i.e., around pH 7), there are enzymes that are capable of working under conditions with very high or very low pHs. Stability at various pHs can be measured either by standard procedures known to those in the art and/or by the methods described herein. A substantial change in pH stability is evidenced by at least about 5% or greater increase or decrease (in most embodiments, it is preferably an increase) in the half-life of the enzymatic activity, as compared to the enzymatic activity at the enzyme's optimum pH. However, it is not intended that the present invention be limited to any pH stability level nor pH range.
As used herein, "thermal stability" refers to the ability of a protein to function at a particular temperature. In general, most enzymes have a finite range of temperatures at which they will function. In addition to enzymes that work in mid-range temperatures {e.g., room temperature), there are enzymes that are capable of working in very high or very low temperatures. Thermal stability can be measured either by known procedures or by the methods described herein. A substantial change in thermal stability is evidenced by at least about 5% or greater increase or decrease (in most embodiments, it is preferably an increase) in the half-life of the catalytic activity of a mutant when exposed to a different temperature {i.e., higher or lower) than optimum temperature for enzymatic activity. However, it is not intended that the present invention be limited to any temperature stability level nor temperature range. As used herein, the term "chemical stability" refers to the stability of a protein {e.g., an enzyme) towards chemicals that adversely affect its activity. In some embodiments, such chemicals include, but are not limited to hydrogen peroxide, peracids, anionic detergents, cationic detergents, non-ionic detergents, chelants, etc. However, it is not intended that the present invention be limited to any particular chemical stability level nor range of chemical stability.
As used herein, the phrase "neutral metalloprotease activity improvement" refers to the relative improvement of neutral metalloprotease activity, in comparison with a standard enzyme. In some embodiments, the term refers to an improved rate of product formation, while in other embodiments, the term encompasses compositions that produce less hydrolysis product. In additional embodiments, the term refers to neutral metalloprotease compositions with altered substrate specificity. As used herein, the phrase "alteration in substrate specificity" refers to changes in the substrate specificity of an enzyme. In some embodiments, a change in substrate specificity is defined as a difference between the Kcat/Km ratio observed with an enzyme compared to enzyme variants or other enzyme compositions. Enzyme substrate specificities vary, depending upon the substrate tested. The substrate specificity of an enzyme is determined by comparing the catalytic efficiencies it exhibits with different substrates. These determinations find particular use in assessing the efficiency of mutant enzymes, as it is generally desired to produce variant enzymes that exhibit greater ratios for particular substrates of interest. However, it is not intended that the present invention be limited to any particular substrate composition nor any specific substrate specificity. As used herein, "surface property" is used in reference to an electrostatic charge, as well as properties such as the hydrophobicity and/or hydrophilicity exhibited by the surface of a protein.
As used herein, the phrase "is independently selected from the group consisting of . . . ." means that moieties or elements that are selected from the referenced Markush group can be the same, can be different or any mixture of elements as indicated in the following example:
A molecule having 3 R groups wherein each R group is independently selected from the group consisting of A, B and C. Here the three R groups may be: AAA, BBB, CCC, AAB, AAC, BBA, BBC, CCA, CCB, or ABC. In reference to chemical compositions, the term "substituted" as used herein, means that the organic composition or radical to which the term is applied is:
(a) made unsaturated by the elimination of at least one element or radical; or
(b) at least one hydrogen in the compound or radical is replaced with a moiety containing one or more (i) carbon, (ii) oxygen, (iii) sulfur, (iv) nitrogen or (v) halogen atoms; or
(c) both (a) and (b). Moieties which may replace hydrogen as described in (b) immediately above, that contain only carbon and hydrogen atoms, are hydrocarbon moieties including, but not limited to, alkyl, alkenyl, alkynyl, alkyldienyl, cycloalkyl, phenyl, alkyl phenyl, naphthyl, anthryl, phenanthryl, fluoryl, steroid groups, and combinations of these groups with each other and with polyvalent hydrocarbon groups such as alkylene, alkylidene and alkylidyne groups.
Moieties containing oxygen atoms that may replace hydrogen as described in (b) immediately above include, but are not limited to, hydroxy, acyl or keto, ether, epoxy, carboxy, and ester containing groups. Moieties containing sulfur atoms that may replace hydrogen as described in (b) immediately above include, but are not limited to, the sulfur-containing acids and acid ester groups, thioether groups, mercapto groups and thioketo groups. Moieties containing nitrogen atoms that may replace hydrogen as described in (b) immediately above include, but are not limited to, amino groups, the nitro group, azo groups, ammonium groups, amide groups, azido groups, isocyanate groups, cyano groups and nitrile groups. Moieties containing halogen atoms that may replace hydrogen as described in (b) immediately above include chloro, bromo, fluoro, iodo groups and any of the moieties previously described where a hydrogen or a pendant alkyl group is substituted by a halo group to form a stable substituted moiety.
It is understood that any of the above moieties (b)(i) through (b)(v) can be substituted into each other in either a monovalent substitution or by loss of hydrogen in a polyvalent substitution to form another monovalent moiety that can replace hydrogen in the organic compound or radical.
As used herein, the terms "purified" and "isolated" refer to the removal of contaminants from a sample. For example, neutral metalloprotease are purified by removal of contaminating proteins and other compounds within a solution or preparation that are not neutral metalloprotease. In some embodiments, recombinant neutral metalloprotease are expressed in bacterial or fungal host cells and these recombinant neutral metalloproteases are purified by the removal of other host cell constituents; the percent of recombinant neutral metalloprotease polypeptides is thereby increased in the sample. In particularly preferred embodiments, the metalloprotease of the present invention is substantially purified to a level of at least about 99% of the protein component, as determined by SDS-PAGE or other standard methods known in the art. In alternative preferred embodiments, the metalloprotease of the present invention comprise at least about 99% of the protease component of the compositions. In yet alternative embodiments, the metalloprotease is present in a range of about at least 90-95% of the total protein and/or protease.
As used herein, "protein of interest," refers to a protein (e.g., an enzyme or "enzyme of interest") which is being analyzed, identified and/or modified. Naturally-occurring, as well as recombinant proteins find use in the present invention.
As used herein, "protein" refers to any composition comprised of amino acids and recognized as a protein by those of skill in the art. The terms "protein," "peptide" and polypeptide are used interchangeably herein. Wherein a peptide is a portion of a protein, those skilled in the art understand the use of the term in context. As used herein, functionally and/or structurally similar proteins are considered to be
"related proteins." In some embodiments, these proteins are derived from a different genus and/or species, including differences between classes of organisms (e.g., a bacterial protein and a fungal protein). In some embodiments, these proteins are derived from a different genus and/or species, including differences between classes of organisms (e.g., a bacterial enzyme and a fungal enzyme). In additional embodiments, related proteins are provided from the same species. Indeed, it is not intended that the present invention be limited to related proteins from any particular source(s). In addition, the term "related proteins" encompasses tertiary structural homologs and primary sequence homologs (e.g., the neutral metalloprotease of the present invention). For example, the present invention encompasses such homologs as those provided in Figures 3-5. Additional homologs are contemplated, including but not limited to metalloprotease enzymes obtained from B. cereus, B. cereus E33L, B. caldolyticus, B.pumulis, B. megaterium, B subtilis amylosacchariticus, Brevibacillus brevis, Paenibacillus polymyxa (Bacillus polymyxά), B. stearothermophilus, B. thuringiensis, B. subtilis and 5. aureus, as well as aureolysin, extracellular elastase, and neutral protease B. In further embodiments, the term encompasses proteins that are immunologically cross-reactive.
As used herein, the term "derivative" refers to a protein which is derived from a protein by addition of one or more amino acids to either or both the C- and N-terminal end(s), substitution of one or more amino acids at one or a number of different sites in the amino acid sequence, and/or deletion of one or more amino acids at either or both ends of the protein or at one or more sites in the amino acid sequence, and/or insertion of one or more amino acids at one or more sites in the amino acid sequence. The preparation of a protein derivative is preferably achieved by modifying a DNA sequence which encodes for the native protein, transformation of that DNA sequence into a suitable host, and expression of the modified DNA sequence to form the derivative protein.
Related (and derivative) proteins comprise "variant proteins." In some preferred embodiments, variant proteins differ from a parent protein and one another by a small number of amino acid residues. The number of differing amino acid residues may be one or more, preferably 1, 2, 3, 4, 5, 10, 15, 20, 30, 40, 50, or more amino acid residues. In some preferred embodiments, the number of different amino acids between variants is between 1 and 10. In some particularly preferred embodiments, related proteins and particularly variant proteins comprise at least 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%,
90%, 95%, 97%, 98%, or 99% amino acid sequence identity. Additionally, a related protein or a variant protein as used herein, refers to a protein that differs from another related protein or a parent protein in the number of prominent regions. For example, in some embodiments, variant proteins have 1, 2, 3, 4, 5, or 10 corresponding prominent regions that differ from the parent protein.
Several methods are known in the art that are suitable for generating variants of the enzymes of the present invention, including but not limited to site-saturation mutagenesis, scanning mutagenesis, insertional mutagenesis, random mutagenesis, site-directed mutagenesis, and directed-evolution, as well as various other recombinatorial approaches. Characterization of wild-type and mutant proteins is accomplished via any means suitable and is preferably based on the assessment of properties of interest. For example, pH and/or temperature, as well as detergent and /or oxidative stability is/are determined in some embodiments of the present invention. Indeed, it is contemplated that enzymes having various degrees of stability in one or more of these characteristics (pH, temperature, proteolytic stability, detergent stability, and/or oxidative stability) will find use.
As used herein, "expression vector" refers to a DNA construct containing a DNA sequence that is operably linked to a suitable control sequence capable of effecting the expression of the DNA in a suitable host. Such control sequences include a promoter to effect transcription, an optional operator sequence to control such transcription, a sequence encoding suitable mRNA ribosome binding sites and sequences which control termination of transcription and translation. The vector may be a plasmid, a phage particle, or simply a potential genomic insert. Once transformed into a suitable host, the vector may replicate and function independently of the host genome, or may, in some instances, integrate into the genome itself. In the present specification, "plasmid," "expression plasmid," and "vector" are often used interchangeably as the plasmid is the most commonly used form of vector at present. However, the invention is intended to include such other forms of expression vectors that serve equivalent functions and which are, or become, known in the art.
In some preferred embodiments, the neutral metalloprotease gene is ligated into an appropriate expression plasmid. The cloned neutral metalloprotease gene is then used to transform or transfect a host cell in order to express the neutral metalloprotease gene. This plasmid may replicate in hosts in the sense that it contains the well-known elements necessary for plasmid replication or the plasmid may be designed to integrate into the host chromosome. The necessary elements are provided for efficient gene expression (e.g., a promoter operably linked to the gene of interest). In some embodiments, these necessary elements are supplied as the gene's own homologous promoter if it is recognized, (Le., transcribed, by the host), a transcription terminator (a polyadenylation region for eukaryotic host cells) which is exogenous or is supplied by the endogenous terminator region of the neutral metalloprotease gene. In some embodiments, a selection gene such as an antibiotic resistance gene that enables continuous cultural maintenance of plasmid-infected host cells by growth in antimicrobial-containing media is also included.
The following cassette mutagenesis method may be used to facilitate the construction of the neutral metalloprotease variants of the present invention, although other methods may be used. First, as described herein, a naturally-occurring gene encoding the neutral metalloprotease is obtained and sequenced in whole or in part. Then, the sequence is scanned for a point at which it is desired to make a mutation (deletion, insertion or substitution) of one or more amino acids in the encoded neutral metalloprotease. The sequences flanking this point are evaluated for the presence of restriction sites for replacing a short segment of the gene with an oligonucleotide pool which when expressed will encode various mutants. Such restriction sites are preferably unique sites within the protein gene so as to facilitate the replacement of the gene segment. However, any convenient restriction site which is not overly redundant in the neutral metalloprotease gene may be used, provided the gene fragments generated by restriction digestion can be reassembled in proper sequence. If restriction sites are not present at locations within a convenient distance from the selected point (from 10 to 15 nucleotides), such sites are generated by substituting nucleotides in the gene in such a fashion that neither the reading frame nor the amino acids encoded are changed in the final construction. Mutation of the gene in order to change its sequence to conform to the desired sequence is accomplished by M 13 primer extension in accord with generally known methods. The task of locating suitable flanking regions and evaluating the needed changes to arrive at two convenient restriction site sequences is made routine by the redundancy of the genetic code, a restriction enzyme map of the gene and the large number of different restriction enzymes. Note that if a convenient flanking restriction site is available, the above method need be used only in connection with the flanking region which does not contain a site. Once the naturally-occurring DNA and/or synthetic DNA is cloned, the restriction sites flanking the positions to be mutated are digested with the cognate restriction enzymes and a plurality of end termini-complementary oligonucleotide cassettes are ligated into the gene. The mutagenesis is simplified by this method because all of the oligonucleotides can be synthesized so as to have the same restriction sites, and no synthetic linkers are necessary to create the restriction sites.
As used herein, "corresponding to," refers to a residue at the enumerated position in a protein or peptide, or a residue that is analogous, homologous, or equivalent to an enumerated residue in a protein or peptide.
As used herein, "corresponding region," generally refers to an analogous position along related proteins or a parent protein.
The terms "nucleic acid molecule encoding," "nucleic acid sequence encoding," "DNA sequence encoding," and "DNA encoding" refer to the order or sequence of deoxyribonucleotides along a strand of deoxyribonucleic acid. The order of these deoxyribonucleotides determines the order of amino acids along the polypeptide (protein) chain. The DNA sequence thus codes for the amino acid sequence.
As used herein, the term "analogous sequence" refers to a sequence within a protein that provides similar function, tertiary structure, and/or conserved residues as the protein of interest (i.e., typically the original protein of interest). For example, in epitope regions that contain an alpha helix or a beta sheet structure, the replacement amino acids in the analogous sequence preferably maintain the same specific structure. The term also refers to nucleotide sequences, as well as amino acid sequences. In some embodiments, analogous sequences are developed such that the replacement amino acids result in a variant enzyme showing a similar or improved function. In some preferred embodiments, the tertiary structure and/or conserved residues of the amino acids in the protein of interest are located at or near the segment or fragment of interest. Thus, where the segment or fragment of interest contains, for example, an alpha-helix or a beta-sheet structure, the replacement amino acids preferably maintain that specific structure.
As used herein, "homologous protein" refers to a protein {e.g., neutral metalloprotease) that has similar action and/or structure, as a protein of interest (e.g., an neutral metalloprotease from another source). It is not intended that homologs (also referred to herein as "homologues") be necessarily related evolutionarily. Thus, it is intended that the term encompass the same or similar enzyme(s) (i.e., in terms of structure and function) obtained from different species. In some preferred embodiments, it is desirable to identify a homolog that has a quaternary, tertiary and/or primary structure similar to the protein of interest, as replacement for the segment or fragment in the protein of interest with an analogous segment from the homolog will reduce the disruptiveness of the change. As used herein, "homologous genes" refers to at least a pair of genes from different species, which genes correspond to each other and which are identical or very similar to each other. The term encompasses genes that are separated by speciation (Le., the development of new species) (e.g., orthologous genes), as well as genes that have been separated by genetic duplication (e.g., paralogous genes). These genes encode "homologous proteins." As used herein, "ortholog" and "orthologous genes" refer to genes in different species that have evolved from a common ancestral gene (Le., a homologous gene) by speciation. Typically, orthologs retain the same function during the course of evolution. Identification of orthologs finds use in the reliable prediction of gene function in newly sequenced genomes. As used herein, "paralog" and "paralogous genes" refer to genes that are related by duplication within a genome. While orthologs retain the same function through the course of evolution, paralogs evolve new functions, even though some functions are often related to the original one. Examples of paralogous genes include, but are not limited to genes encoding trypsin, chymotrypsin, elastase, and thrombin, which are all serine proteinases and occur together within the same species.
As used herein, "wild-type" and "native" proteins are those found in nature. The terms "wild-type sequence," and "wild-type gene" are used interchangeably herein, to refer to a sequence that is native or naturally occurring in a host cell. In some embodiments, the wild-type sequence refers to a sequence of interest that is the starting point of a protein engineering project. The genes encoding the naturally-occurring protein may be obtained in accord with the general methods known to those skilled in the art. The methods generally comprise synthesizing labeled probes having putative sequences encoding regions of the protein of interest, preparing genomic libraries from organisms expressing the protein, and screening the libraries for the gene of interest by hybridization to the probes. Positively hybridizing clones are then mapped and sequenced.
The term "recombinant DNA molecule" as used herein refers to a DNA molecule that is comprised of segments of DNA joined together by means of molecular biological techniques.
The term "recombinant oligonucleotide" refers to an oligonucleotide created using molecular biological manipulations, including but not limited to, the ligation of two or more oligonucleotide sequences generated by restriction enzyme digestion of a polynucleotide sequence, the synthesis of oligonucleotides (e.g., the synthesis of primers or oligonucleotides) and the like.
The degree of homology between sequences may be determined using any suitable method known in the art (See e.g., Smith and Waterman, Adv. Appl. Math., 2:482 [1981]; Needleman and Wunsch, J. MoI. Biol., 48:443 [1970]; Pearson and Lipman, Proc. Natl. Acad. Sci. USA 85:2444 [1988]; programs such as GAP, BESTFIT, FASTA, and TFASTA in the Wisconsin Genetics Software Package (Genetics Computer Group, Madison, WI); and Devereux et al., Nucl. Acid Res., 12:387-395 [1984]).
For example, PILEUP is a useful program to determine sequence homology levels. PDLEUP creates a multiple sequence alignment from a group of related sequences using progressive, pairwise alignments. It can also plot a tree showing the clustering relationships used to create the alignment. PILEUP uses a simplification of the progressive alignment method of Feng and Doolittle, (Feng and Doolittle, J. MoI. Evol., 35:351-360 [1987]). The method is similar to that described by Higgins and Sharp (Higgins and Sharp, CABIOS 5: 151-153 [1989]). Useful PILEUP parameters including a default gap weight of 3.00, a default gap length weight of 0.10, and weighted end gaps. Another example of a useful algorithm is the BLAST algorithm, described by Altschul et ah, (Altschul et al., J. MoI. Biol., 215:403-410, [1990]; and Karlin et al, Proc. Natl. Acad. Sci. USA 90:5873-5787 [1993]). One particularly useful BLAST program is the WU-BLAST-2 program {See, Altschul et al., Meth. Enzymol.,, 266:460-480 [1996]). parameters "W," "T," and "X" determine the sensitivity and speed of the alignment. The BLAST program uses as defaults a wordlength (W) of 11, the BLOSUM62 scoring matrix (See, Henikoff and Henikoff, Proc. Natl. Acad. Sci. USA 89:10915 [1989]) alignments (B) of 50, expectation (E) of 10, M'5, N'-4, and a comparison of both strands.
As used herein, "percent (%) nucleic acid sequence identity" is defined as the percentage of nucleotide residues in a candidate sequence that is identical with the nucleotide residues of the sequence. As used herein, the term "hybridization" refers to the process by which a strand of nucleic acid joins with a complementary strand through base pairing, as known in the art.
As used herein, the phrase "hybridization conditions" refers to the conditions under which hybridization reactions are conducted. These conditions are typically classified by degree of "stringency" of the conditions under which hybridization is measured. The degree of stringency can be based, for example, on the melting temperature (Tm) of the nucleic acid binding complex or probe. For example, "maximum stringency" typically occurs at about Tm-5°C (5° below the Tm of the probe); "high stringency" at about 5-10° below the Tm; "intermediate stringency" at about 10-20° below the Tm of the probe; and "low stringency" at about 20-25° below the Tm. Alternatively, or in addition, hybridization conditions can be based upon the salt or ionic strength conditions of hybridization and/or one or more stringency washes. For example, 6xSSC = very low stringency; 3xSSC = low to medium stringency; IxSSC = medium stringency; and 0.5xSSC = high stringency. Functionally, maximum stringency conditions may be used to identify nucleic acid sequences having strict identity or near-strict identity with the hybridization probe; while high stringency conditions are used to identify nucleic acid sequences having about 80% or more sequence identity with the probe.
For applications requiring high selectivity, it is typically desirable to use relatively stringent conditions to form the hybrids (e.g., relatively low salt and/or high temperature conditions are used). The phrases "substantially similar and "substantially identical" in the context of at least two nucleic acids or polypeptides typically means that a polynucleotide or polypeptide comprises a sequence that has at least about 40% identity, more preferable at least about 50% identity, yet more preferably at least about 60% identity, preferably at least about 75% identity, more preferably at least about 80% identity, yet more preferably at least about 90%, still more preferably about 95%, most preferably about 97% identity, sometimes as much as about 98% and about 99% sequence identity, compared to the reference (i.e., wild-type) sequence. Sequence identity may be determined using known programs such as BLAST, ALIGN, and CLUSTAL using standard parameters. (See e.g., Altschul, et al, J. MoI. Biol. 215:403-410 [1990]; Henikoff et al, Proc. Natl. Acad. Sci. USA 89:10915 [1989]; Karin et al, Proc. Natl. Acad. Sci USA 90:5873 [1993]; and Higgins et al, Gene 73:237 - 244 [1988]). Software for performing BLAST analyses is publicly available through the National
Center for Biotechnology Information. Also, databases may be searched using FASTA (Pearson et al, Proc. Natl. Acad. Sci. USA 85:2444-2448 [1988]). One indication that two polypeptides are substantially identical is that the first polypeptide is immunologically cross- reactive with the second polypeptide. Typically, polypeptides that differ by conservative amino acid substitutions are immunologically cross-reactive. Thus, a polypeptide is substantially identical to a second polypeptide, for example, where the two peptides differ only by a conservative substitution. Another indication that two nucleic acid sequences are substantially identical is that the two molecules hybridize to each other under stringent conditions (e.g., within a range of medium to high stringency). As used herein, "equivalent residues" refers to proteins that share particular amino acid residues. For example, equivalent resides may be identified by determining homology at the level of tertiary structure for a protein (e.g., neutral metalloprotease) whose tertiary structure has been determined by x-ray crystallography. Equivalent residues are defined as those for which the atomic coordinates of two or more of the main chain atoms of a particular amino acid residue of the protein having putative equivalent residues and the protein of interest (N on N, CA on CA, C on C and O on O) are within 0.13 nm and preferably 0.1 nm after alignment. Alignment is achieved after the best model has been oriented and positioned to give the maximum overlap of atomic coordinates of non-hydrogen protein atoms of the proteins analyzed. The preferred model is the crystallographic model giving the lowest R factor for experimental diffraction data at the highest resolution available, determined using methods known to those skilled in the art of crystallography and protein characterization/analysis. As used herein, the terms "hybrid neutral metalloproteases" and "fusion neutral metalloproteases" refer to proteins that are engineered from at least two different or "parental" proteins. In preferred embodiments, these parental proteins are homologs of one another. For example, in some embodiments, a preferred hybrid neutral metalloprotease or fusion protein contains the N-terminus of a protein and the C-terminus of a homolog of the protein. In some preferred embodiment, the two terminal ends are combined to correspond to the full-length active protein.
The term "regulatory element" as used herein refers to a genetic element that controls some aspect of the expression of nucleic acid sequences. For example, a promoter is a regulatory element which facilitates the initiation of transcription of an operably linked coding region. Additional regulatory elements include splicing signals, polyadenylation signals and termination signals.
As used herein, "host cells" are generally prokaryotic or eukaryotic hosts which are transformed or transfected with vectors constructed using recombinant DNA techniques known in the art. Transformed host cells are capable of either replicating vectors encoding the protein variants or expressing the desired protein variant. In the case of vectors which encode the pre- or prepro-form of the protein variant, such variants, when expressed, are typically secreted from the host cell into the host cell medium.
The term "introduced" in the context of inserting a nucleic acid sequence into a cell, means transformation, transduction or transfection. Means of transformation include protoplast transformation, calcium chloride precipitation, electro oration, naked DNA and the like as known in the art. {See, Chang and Cohen, MoI. Gen. Genet., 168:111 - 115 [1979]; Smith et al, Appl. Env. Microbiol., 51:634 [1986]; and the review article by Ferrari et al, in Harwood, Bacillus, Plenum Publishing Corporation, pp. 57-72 [1989]). The term "promoter/enhancer" denotes a segment of DNA which contains sequences capable of providing both promoter and enhancer functions (for example, the long terminal repeats of retroviruses contain both promoter and enhancer functions). The enhancer/promoter may be "endogenous" or "exogenous" or "heterologous." An endogenous enhancer/promoter is one which is naturally linked with a given gene in the genome. An exogenous (heterologous) enhancer/promoter is one which is placed in juxtaposition to a gene by means of genetic manipulation {i.e., molecular biological techniques). The presence of "splicing signals" on an expression vector often results in higher levels of expression of the recombinant transcript. Splicing signals mediate the removal of introns from the primary RNA transcript and consist of a splice donor and acceptor site (Sambrook et al, Molecular Cloning: A Laboratory Manual, 2nd ed., Cold Spring Harbor Laboratory Press, New York [1989], pp. 16.7-16.8). A commonly used splice donor and acceptor site is the splice junction from the 16S RNA of SV40.
The term "stable transfection" or "stably transfected" refers to the introduction and integration of foreign DNA into the genome of the transfected cell. The term "stable transfectant" refers to a cell which has stably integrated foreign or exogenous DNA into the genomic DNA of the transfected cell.
The terms "selectable marker" or "selectable gene product" as used herein refer to the use of a gene which encodes an enzymatic activity that confers resistance to an antibiotic or drug upon the cell in which the selectable marker is expressed.
As used herein, the terms "amplification" and "gene amplification" refer to a process by which specific DNA sequences are disproportionately replicated such that the amplified gene becomes present in a higher copy number than was initially present in the genome. In some embodiments, selection of cells by growth in the presence of a drug {e.g., an inhibitor of an inhibitable enzyme) results in the amplification of either the endogenous gene encoding the gene product required for growth in the presence of the drug or by amplification of exogenous (i.e., input) sequences encoding this gene product, or both. Selection of cells by growth in the presence of a drug (e.g., an inhibitor of an inhibitable enzyme) may result in the amplification of either the endogenous gene encoding the gene product required for growth in the presence of the drug or by amplification of exogenous (i.e., input) sequences encoding this gene product, or both. "Amplification" is a special case of nucleic acid replication involving template specificity. It is to be contrasted with non-specific template replication (i.e., replication that is template-dependent but not dependent on a specific template). Template specificity is here distinguished from fidelity of replication (i.e., synthesis of the proper polynucleotide sequence) and nucleotide (ribo- or deoxyribo-) specificity. Template specificity is frequently described in terms of "target" specificity. Target sequences are "targets" in the sense that they are sought to be sorted out from other nucleic acid. Amplification techniques have been designed primarily for this sorting out. As used herein, the term "co-amplification" refers to the introduction into a single cell of an amplifiable marker in conjunction with other gene sequences (i.e., comprising one or more non-selectable genes such as those contained within an expression vector) and the application of appropriate selective pressure such that the cell amplifies both the amplifiable marker and the other, non-selectable gene sequences. The amplifiable marker may be physically linked to the other gene sequences or alternatively two separate pieces of DNA, one containing the amplifiable marker and the other containing the non-selectable marker, may be introduced into the same cell.
As used herein, the terms "amplifiable marker," "amplifiable gene," and "amplification vector" refer to a marker, gene or a vector encoding a gene which permits the amplification of that gene under appropriate growth conditions.
As used herein, the term "amplifiable nucleic acid" refers to nucleic acids which may be amplified by any amplification method. It is contemplated that "amplifiable nucleic acid" will usually comprise "sample template." As used herein, the term "sample template" refers to nucleic acid originating from a sample which is analyzed for the presence of "target" (defined below). In contrast, "background template" is used in reference to nucleic acid other than sample template which may or may not be present in a sample. Background template is most often inadvertent. It may be the result of carryover, or it may be due to the presence of nucleic acid contaminants sought to be purified away from the sample. For example, nucleic acids from organisms other than those to be detected may be present as background in a test sample.
"Template specificity" is achieved in most amplification techniques by the choice of enzyme. Amplification enzymes are enzymes that, under conditions they are used, will process only specific sequences of nucleic acid in a heterogeneous mixture of nucleic acid. For example, in the case of Qβ replicase, MDV-I RNA is the specific template for the replicase (See e.g., Kacian et al, Proc. Natl. Acad. Sci. USA 69:3038 [1972]). Other nucleic acids are not replicated by this amplification enzyme. Similarly, in the case of T7 RNA polymerase, this amplification enzyme has a stringent specificity for its own promoters (See, Chamberlin et al, Nature 228:227 [1970]). In the case of T4 DNA ligase, the enzyme will not ligate the two oligonucleotides or polynucleotides, where there is a mismatch between the oligonucleotide or polynucleotide substrate and the template at the ligation junction (See, Wu and Wallace, Genomics 4:560 [1989]). Finally, Taq and Pfu polymerases, by virtue of their ability to function at high temperature, are found to display high specificity for the sequences bounded and thus defined by the primers; the high temperature results in thermodynamic conditions that favor primer hybridization with the target sequences and not hybridization with non-target sequences. As used herein, the term "primer" refers to an oligonucleotide, whether occurring naturally as in a purified restriction digest or produced synthetically, which is capable of acting as a point of initiation of synthesis when placed under conditions in which synthesis of a primer extension product which is complementary to a nucleic acid strand is induced, {i.e., in the presence of nucleotides and an inducing agent such as DNA polymerase and at a suitable temperature and pH). The primer is preferably single stranded for maximum efficiency in amplification, but may alternatively be double stranded. If double stranded, the primer is first treated to separate its strands before being used to prepare extension products. Preferably, the primer is an oligodeoxyribonucleotide. The primer must be sufficiently long to prime the synthesis of extension products in the presence of the inducing agent. The exact lengths of the primers will depend on many factors, including temperature, source of primer and the use of the method.
As used herein, the term "probe" refers to an oligonucleotide {i.e., a sequence of nucleotides), whether occurring naturally as in a purified restriction digest or produced synthetically, recombinantly or by PCR amplification, which is capable of hybridizing to another oligonucleotide of interest. A probe may be single-stranded or double-stranded.
Probes are useful in the detection, identification and isolation of particular gene sequences. It is contemplated that any probe used in the present invention will be labeled with any "reporter molecule," so that is detectable in any detection system, including, but not limited to enzyme {e.g., ELISA, as well as enzyme-based histochemical assays), fluorescent, radioactive, and luminescent systems. It is not intended that the present invention be limited to any particular detection system or label.
As used herein, the term "target," when used in reference to amplification methods {e.g., the polymerase chain reaction), refers to the region of nucleic acid bounded by the primers used for polymerase chain reaction. Thus, the "target" is sought to be sorted out from other nucleic acid sequences. A "segment" is defined as a region of nucleic acid within the target sequence. As used herein, the term "polymerase chain reaction" ("PCR") refers to the methods of U.S. Patent Nos. 4,683,195, 4,683,202, and 4,965,188, hereby incorporated by reference, which include methods for increasing the concentration of a segment of a target sequence in a mixture of genomic DNA without cloning or purification. This process for amplifying the target sequence consists of introducing a large excess of two oligonucleotide primers to the DNA mixture containing the desired target sequence, followed by a precise sequence of thermal cycling in the presence of a DNA polymerase. The two primers are complementary to their respective strands of the double stranded target sequence. To effect amplification, the mixture is denatured and the primers then annealed to their complementary sequences within the target molecule. Following annealing, the primers are extended with a polymerase so as to form a new pair of complementary strands. The steps of denaturation, primer annealing and polymerase extension can be repeated many times (i.e., denaturation, annealing and extension constitute one "cycle"; there can be numerous "cycles") to obtain a high concentration of an amplified segment of the desired target sequence. The length of the amplified segment of the desired target sequence is determined by the relative positions of the primers with respect to each other, and therefore, this length is a controllable parameter. By virtue of the repeating aspect of the process, the method is referred to as the "polymerase chain reaction" (hereinafter "PCR"). Because the desired amplified segments of the target sequence become the predominant sequences (in terms of concentration) in the mixture, they are said to be "PCR amplified".
As used herein, the term "amplification reagents" refers to those reagents (deoxyribonucleotide triphosphates, buffer, etc.), needed for amplification except for primers, nucleic acid template and the amplification enzyme. Typically, amplification reagents along with other reaction components are placed and contained in a reaction vessel (test tube, microwell, etc.).
With PCR, it is possible to amplify a single copy of a specific target sequence in genomic DNA to a level detectable by several different methodologies (e.g., hybridization with a labeled probe; incorporation of biotinylated primers followed by avidin-enzyme conjugate detection; incorporation of 32P-labeled deoxynucleotide triphosphates, such as dCTP or dATP, into the amplified segment). In addition to genomic DNA, any oligonucleotide or polynucleotide sequence can be amplified with the appropriate set of primer molecules. In particular, the amplified segments created by the PCR process itself are, themselves, efficient templates for subsequent PCR amplifications.
As used herein, the terms "PCR product," "PCR fragment," and "amplification product" refer to the resultant mixture of compounds after two or more cycles of the PCR steps of denaturation, annealing and extension are complete. These terms encompass the case where there has been amplification of one or more segments of one or more target sequences.
As used herein, the terms "restriction endonucleases" and "restriction enzymes" refer to bacterial enzymes, each of which cut double-stranded DNA at or near a specific nucleotide sequence.
DETAILED DESCRIPTION OF THE PRESENT INVENTION
The present invention provides methods and compositions comprising at least one neutral metalloprotease enzyme that has improved storage stability. In some embodiments, the neutral metalloprotease finds use in cleaning and other applications. In some particularly preferred embodiments, the present invention provides methods and compositions comprising neutral metalloprotease(s) obtained from Bacillus sp. In some more particularly preferred embodiments, the neutral metalloprotease is obtained from B. amyloliquefaciens. In still further preferred embodiments, the neutral metalloprotease is a variant of the B. amyloliquefaciens neutral metalloprotease. In yet additional embodiments, the neutral metalloprotease is a homolog of the the B. amyloliquefaciens neutral metalloprotease. The present invention finds particular use in applications including, but not limited to cleaning, bleaching and disinfecting. Also as described in more detail in the Examples below, the present invention provides many advantages for cleaning of a wide range of objects, including but not limited to clothing, fabrics, medical devices, etc. In addition, the present invention provides compositions that are effective in cleaning, bleaching, and disinfecting, over a range of wash temperatures and pHs. In general, proteases hydrolyze amide linkages of proteins via addition of a water molecule to the peptide bond(s). Cleavage occurs at the carbonyl-group of the peptide bond. In bacterial species such as Bacillus, there are two main classes of extracellular proteases namely, alkaline or serine proteases and neutral metalloproteases.
Neutral metalloendopeptidases (i.e., neutral metalloproteases) (EC 3.4.24.4) belong to a protease class that has an absolute requirement for zinc ions for catalytic activity. These enzymes are optimally active at neutral pH and are in the 30 to 40 kDa size range. Neutral metalloproteases bind between two and four calcium ions that contribute to the structural stability of the protein. The bound metal ion at the active site of metalloproteases is an essential feature that allows the activation of a water molecule. The water molecule then functions as the nucleophile and cleaves the carbonyl group of the peptide bond. The neutral zinc-binding metalloprotease family includes the bacterial enzyme thermolysin, and thermolysin-like proteases ("TLPs"), as well as carboxypeptidase A (a digestive enzyme), and the matrix metalloproteases that catalyze the reactions in tissue remodeling and degradation. The only well characterized of these proteases, with respect to stability and function, is thermolysin and its variants (TLPs). Indeed, much research has been focused on the engineering Bacillus subtilis neutral proteases to increase the thermal stability of the enzyme (See e.g., Vriend et al., In, Tweel et al. (eds), Stability and Stabilization of enzymes, Elsevier, pp. 93-99 [1993]).
Most effort has been focused on increasing the stability of the protease by altering structural determinants identified through the use of molecular modeling suggested to prevent local unfolding processes that would result in autolysis of the protein and cause the neutral protease to denature at high temperatures (See e.g., van den Burg et al., in Hopsu-Havu et al., (eds), Proteolysis in Cell Functions Manipulating the Autolytic Pathway of a Bacillus Protease. Biomedical and Health Research Vol. 13, IOS Press [1997] p. 576).
Compositions and methods to engineer neutral metalloproteases with improved characteristics are provided herein. As indicated herein, calcium ions have been reported for other proteases such as thermolysin to prevent autolysis. The B. stearothermophilus neutral protease has been stabilized against autolysis and proteolytic degradation by addition of calcium (See, Durrschmidt et al, FEBS J., 272:1523-1534 [2005]).
Indeed, the present invention provides compositions and methods suitable for the engineering of neutral metalloproteases that are independent of calcium in order to maintain their structural stability. In some embodiments, engineering prevents the local unfolding in a particular secondary structural element that may prevent proteolysis. Natural and engineered proteases, such as subtilisin are often expressed in Bacillus subtilis and several have been applied in detergent formulations to remove proteinaceous stains. Others have been applied for example in the baking industry {e.g., thermolysin from Bacillus thermoproteolyticus; See e.g., Galante and Formantici, Curr. Organic Chem., 7, 1399-1422 [2003]). In general, the serine proteases have been more widely utilized in detergents, at least partially due to the relative ease with which these proteases can be stabilized.
Indeed, metalloproteases are less frequently used in industry, and particularly in the detergent industry for a number of reasons. These enzymes involve more complex protein systems, as the enzymes have the absolute requirement for calcium and zinc ions for stability and function, respectively. Further, the detergent solution as well as the water used in the laundry process often contains components that often interfere with the binding of the ions by the enzyme or chelate these ions, resulting in a decrease or loss of proteolytic function and destabilization of the protease. In contrast to the currently used metalloprotease enzyme systems, the present invention provides neutral metalloproteases that are sufficiently stabilized to facilitate long- term shelf storage in liquid laundry detergent compositions. In particularly preferred embodiments, the metalloprotease stability and activity are preserved through complexing the enzyme with its obligatory active-site zinc molecule. Importantly, the combination of calcium and zinc ions does not have a deleterious effect on the enzyme's function. In some embodiments, the neutral metalloprotease stabilized is the wild-type metalloprotease from Bacillus amyloliquefaciens (e.g., purified MULTIFECT® Neutral; "PMN"). In alternative preferred embodiments, recombinant neutral metalloprotease (e.g., Bacillus amyloliquefaciens neutral metalloprotease cloned into Bacillus subtilis ("nprE")). In additional embodiments, metalloproteases with improved stability encompass enzymes with increased affinity for one or more of the calcium binding sites of the enzyme. In preferred embodiments, the neutral metalloproteases of the present invention find use in general detergent applications, including but not limited to cold water temperatures, grass stains, and/or low pH conditions. The present invention provides conditions that stabilize zinc-binding neutral metalloprotease for increased storage stability in detergent bases and/or compositions. In preferred embodiments, the detergent compositions comprise at least one metalloprotease (e.g., any Bacillus neutral metalloprotease) that is stabilized against autolysis and unfolding, by the inclusion within the detergent formulation of the essential zinc and/or calcium ions. In some particularly preferred embodiments, the neutral metalloprotease from Bacillus amyloliquefaciens (PMN) and the recombinant form expressed in Bacillus subtilis (nprE) that bind zinc ion with 10-fold greater affinity than the calcium ion find use in the present invention. The stabilized protease in the presence of essential zinc ions has improved stability against proteolysis when compared to the same proteases with in the absence of ions.
Although some experimental results indicated that nprE loses some proteolytic activity (~ 20 %) after one hour of adding the detergent base, nprE incubated at 32 0C in the presence of zinc ions showed significant stabilization over the test conditions with no additional salts or calcium ions. The presence of both calcium and zinc ions did not show an additive effect. At zinc ion concentrations lower than 15 mM neutral metalloprotease is sufficiently stable over approximately 4 weeks. Thus, the present invention provides compositions comprising the addition of zinc to increase the storage life of neutral metalloprotease in the presence of detergent components.
Furthermore, in alternative embodiments, the zinc cation is replaced with Co2+, Mn2+ or Fe2+ , since all of these ions have been shown to bind and restore the protease activity of neutral metalloproteases. However, it was determined that Mn2+ and Fe2+ do not restore all of the native activity. While Co2+ restores the highest percentage of the activity, it is apparently less firmly bound than Zn2+. The zinc cation is an essential feature in the active site of all neutral metalloproteases, as it is known to play a role in substrate binding and enzyme catalysis {See e.g., Holmquist and Vallee, J. Biol. Chem., 249:4601-4607 [1974]). The relatively tight affinity of the neutral metalloprotease for the zinc cation (~ μM range) and the approximately 10-fold greater affinity for this ion relative to calcium, suggest that zinc functions as a stabilizer, thereby preventing autolysis, proteolysis and unfolding. However, it is not intended that the present invention be limited to any particular mechanisms.
The present invention provides extremely beneficial opportunities for application in the production and development of industrial detergents. Many detergents are available with high specificity towards the removal of protein, starch and grease stains. In particular, the better wash performance of PMN or neutral metalloprotease from B. amyloliquefaciens on Equest Grass (Warwick) indicates that the neutral metalloproteases of the present invention in a detergent base that also contains zinc finds use in improved detergent compositions. Detailed Description of Cleaning and Detergent Formulations of the Present Invention
Unless otherwise noted, all component or composition levels provided herein are made in reference to the active level of that component or composition, and are exclusive of impurities, for example, residual solvents or by-products, which may be present in commercially available sources.
Enzyme components weights are based on total active protein. All percentages and ratios are calculated by weight unless otherwise indicated. All percentages and ratios are calculated based on the total composition unless otherwise indicated.
In the exemplified detergent compositions, the enzymes levels are expressed by pure enzyme by weight of the total composition and unless otherwise specified, the detergent ingredients are expressed by weight of the total compositions.
Cleaning Compositions Comprising Neutral Metalloprotease
The stabilized neutral metalloproteases of the present invention are useful in formulating various detergent compositions. The cleaning composition of the present invention may be advantageously employed for example, in laundry applications, hard surface cleaning, automatic dishwashing applications, as well as cosmetic applications such as dentures, teeth, hair and skin. However, due to the unique advantages of increased effectiveness in lower temperature solutions and the superior color-safety profile, the enzymes of the present invention are ideally suited for laundry applications such as the bleaching of fabrics. Furthermore, the enzymes of the present invention find use in both granular and liquid compositions.
The enzymes of the present invention also find use in cleaning additive products. A cleaning additive product including at least one enzyme of the present invention is ideally suited for inclusion in a wash process when additional bleaching effectiveness is desired. Such instances include, but are not limited to low temperature solution cleaning applications. The additive product may be, in its simplest form, one or more neutral metalloprotease enzyme as provided by the present invention. In some embodiments, the additive is packaged in dosage form for addition to a cleaning process where a source of peroxygen is employed and increased bleaching effectiveness is desired. In some embodiments, the single dosage form comprises a pill, tablet, gelcap or other single dosage unit including pre- measured powders and/or liquids. In some embodiments, filler and/or carrier material(s) are included, in order to increase the volume of such composition. Suitable filler or carrier materials include, but are not limited to, various salts of sulfate, carbonate and silicate as well as talc, clay and the like. In some embodiments filler and/or carrier materials for liquid compositions include water and/or low molecular weight primary and secondary alcohols including polyols and diols. Examples of such alcohols include, but are not limited to, methanol, ethanol, propanol and isopropanol. In some embodiments, the compositions comprise from about 5% to about 90% of such materials. In additional embodiments, acidic fillers are used to reduce the pH of the composition. In some alternative embodiments, the cleaning additive includes at least one activated peroxygen source as described below and/or adjunct ingredients as more fully described below. The cleaning compositions and cleaning additives of the present invention require an effective amount of neutral metalloprotease enzyme as provided in the present invention. In some embodiments, the required level of enzyme is achieved by the addition of one or more species of neutral metalloprotease provided by the present invention. Typically, the cleaning compositions of the present invention comprise at least 0.0001 weight percent, from about 0.0001 to about 1, from about 0.001 to about 0.5, or even from about 0.01 to about 0.1 weight percent of at least one neutral metalloprotease provided by the present invention.
In some preferred embodiments, the cleaning compositions provided herein are typically formulated such that, during use in aqueous cleaning operations, the wash water has a pH of from about 5.0 to about 11.5, or in alternative embodiments, even from about 6.0 to about 10.5. In some preferred embodiments, liquid product formulations are typically formulated to have a neat pH from about 3.0 to about 9.0, while in some alternative embodiments the formulation has a neat pH from about 3 to about 5. In some preferred embodiments, granular laundry products are typically formulated to have a pH from about 8 to about 11. Techniques for controlling pH at recommended usage levels include the use of buffers, alkalis, acids, etc., and are well known to those skilled in the art.
In some particularly preferred embodiments, when at least one neutral metalloprotease is employed in a granular composition or liquid, the neutral metalloprotease is in the form of an encapsulated particle to protect the enzyme from other components of the granular composition during storage. In addition, encapsulation also provides a means of controlling the availability of the neutral metalloprotease(s) during the cleaning process and may enhance performance of the neutral metalloprotease(s). It is contemplated that the encapsulated neutral metalloproteases of the present invention will find use in various settings. It is also intended that the neutral metalloprotease be encapsulated using any suitable encapsulating material(s) and method(s) known in the art.
In some preferred embodiments, the encapsulating material typically encapsulates at least part of the neutral metalloprotease catalyst. In some embodiments, the encapsulating material is water-soluble and/or water-dispersible. In some additional embodiments, the encapsulating material has a glass transition temperature (Tg) of O0C or higher (See e.g., WO 97/11151, particularly from page 6,line 25 to page 7, line 2, for more information regarding glass transition temperatures).
In some embodiments, the encapsulating material is selected from the group consisting of carbohydrates, natural or synthetic gums, chitin and chitosan, cellulose and cellulose derivatives, silicates, phosphates, borates, polyvinyl alcohol, polyethylene glycol, paraffin waxes and combinations thereof. In some embodiments in which the encapsulating material is a carbohydrate, it is selected from the group consisting of monosaccharides, oligosaccharides, polysaccharides, and combinations thereof. IN some preferred embodiments, the encapsulating material is a starch {See e.g., EP 0 922 499; US 4,977,252. US 5,354,559, and US 5,935,826, for descriptions of some exemplary suitable starches)..
In additional embodiments, the encapsulating material comprises a microsphere made from plastic(e.g., thermoplastics, acrylonitrile, methacrylonitrile, polyacrylonitrile, polymethacrylonitrile and mixtures thereof; commercially available microspheres that find use include, but are not limited to EXPANCEL® [Casco Products, Stockholm, Sweden], PM 6545, PM 6550, PM 7220, PM 7228, EXTENDOSPHERES®, and Q-CEL® [PQ Corp., Valley Forge, PA], LUXSIL® and SPHERICELl® [Potters Industries, Inc., Carlstadt, NJ and Valley Forge, PA]).
Processes of Making and Using of Applicants' Cleaning Composition In some preferred embodiments, the cleaning compositions of the present invention are formulated into any suitable form and prepared by any process chosen by the formulator, (See e.g., U.S. 5,879,584, U.S. 5,691,297, U.S. 5,574,005, U.S. 5,569,645, U.S. 5,565,422, U.S. 5,516,448, U.S. 5,489,392, and U.S. 5,486,303, for some non-limiting examples). In some embodiments in which a low pH cleaning composition is desired, the pH of such composition is adjusted via the addition of an acidic material such as HCl.
Adjunct Materials
While not essential for the purposes of the present invention, in some embodiments, the non-limiting list of adjuncts described herein are suitable for use in the cleaning compositions of the present invention. Indeed, in some embodiments, adjuncts are incorporated into the cleaning compositions of the present invention. In some embodiments, adjunct materials assist and/or enhance cleaning performance, treat the substrate to be cleaned, and/or modify the aesthetics of the cleaning composition (e.g., perfumes, colorants, dyes, etc.). It is understood that such adjuncts are in addition to the neutral metalloproteases of the present invention. The precise nature of these additional components, and levels of incorporation thereof, depends on the physical form of the composition and the nature of the cleaning operation for which it is to be used. Suitable adjunct materials include, but are not limited to, surfactants, builders, chelating agents, dye transfer inhibiting agents, deposition aids, dispersants, additional enzymes, and enzyme stabilizers, catalytic materials, bleach activators, bleach boosters, hydrogen peroxide, sources of hydrogen peroxide, preformed peracids, polymeric dispersing agents, clay soil removal/anti-redeposition agents, brighteners, suds suppressors, dyes, perfumes, structure elasticizing agents, fabric softeners, carriers, hydrotropes, processing aids and/or pigments. In addition to those provided explicitly herein, additional examples are known in the art (See e.g., U.S. Patent Nos.
5,576,282, 6,306,812 Bl and 6,326,348 Bl). In some embodiments, the aforementioned adjunct ingredients constitute the balance of the cleaning compositions of the present invention.
Surfactants - In some embodiments, the cleaning compositions of the present invention comprise at least one surfactant or surfactant system, wherein the surfactant is selected from nonionic surfactants, anionic surfactants, cationic surfactants, ampholytic surfactants, zwitterionic surfactants, semi-polar nonionic surfactants, and mixtures thereof. In some low pH cleaning composition embodiments (e.g., compositions having a neat pH of from about 3 to about 5), the composition typically does not contain alkyl ethoxylated sulfate, as it is believed that such surfactant may be hydrolyzed by such compositions the acidic contents. In some embodiments, the surfactant is present at a level of from about 0.1 % to about
60%, while in alternative embodiments, the level is from about 1% to about 50% , while in still further embodiments, the level is from about 5% to about 40%, by weight of the cleaning composition.
Builders - In some embodiments, the cleaning compositions of the present invention comprise one or more detergent builders or builder systems. In some embodiments incorporating at least one builder, the cleaning compositions comprise at least about 1%, from about 3% to about 60% or even from about 5% to about 40% builder by weight of the cleaning composition.
Builders include, but are not limited to, the alkali metal, ammonium and alkanolammonium salts of polyphosphates, alkali metal silicates, alkaline earth and alkali metal carbonates, aluminosilicate builders polycarboxylate compounds, ether hydroxypolycarboxylates, copolymers of maleic anhydride with ethylene or vinyl methyl ether, 1, 3, 5-trihydroxy benzene-2, 4, 6-trisulphonic acid, and carboxymethyloxysuccinic acid, the various alkali metal, ammonium and substituted ammonium salts of polyacetic acids such as ethylenediamine tetraacetic acid and nitrilotriacetic acid, as well as polycarboxylates such as mellitic acid, succinic acid, citric acid, oxydisuccinic acid, polymaleic acid, benzene 1,3,5-tricarboxylic acid, carboxymethyloxysuccinic acid, and soluble salts thereof. Indeed, it is contemplated that any suitable builder will find use in various embodiments of the present invention. Chelating Agents - In some embodiments, the cleaning compositions of the present invention contain at least one chelating agent, Suitable chelating agents include, but are not limited to copper, iron and/or manganese chelating agents and mixtures thereof. In embodiments in which at least one chelating agent is used, the cleaning compositions of the present invention comprise from about 0.1% to about 15% or even from about 3.0% to about 10% chelating agent by weight of the subject cleaning composition. Deposition Aid - In some embodiments, the cleaning compositions of the present invention include at least one deposition aid. Suitable deposition aids include, but are not limited to polyethylene glycol, polypropylene glycol, polycarboxylate, soil release polymers such as polytelephthalic acid, clays such as kaolinite, montmorillonite, atapulgite, illite, bentonite, halloysite, and mixtures thereof.
Dye Transfer Inhibiting Agents - In some embodiments, the cleaning compositions of the present invention include one or more dye transfer inhibiting agents. Suitable polymeric dye transfer inhibiting agents include, but are not limited to, polyvinylpyrrolidone polymers, polyamine N-oxide polymers, copolymers of N-vinylpyrrolidone and N- vinylimidazole, polyvinyloxazolidones and polyvinylimidazoles or mixtures thereof.
In embodiments in which at least one dye transfer inhibiting agent is used, the cleaning compositions of the present invention comprise from about 0.0001% to about 10%, from about 0.01% to about 5%, or even from about 0.1% to about 3% by weight of the cleaning composition. Dispersants - In some embodiments, the cleaning compositions of the present invention contains at least one dispersants. Suitable water-soluble organic materials include, but are not limited to the homo- or co-polymeric acids or their salts, in which the polycarboxylic acid comprises at least two carboxyl radicals separated from each other by not more than two carbon atoms.
Enzymes - In some embodiments, the cleaning compositions of the present invention comprise one or more detergent enzymes which provide cleaning performance and/or fabric care benefits. Examples of suitable enzymes include, but are not limited to, hemicellulases, peroxidases, proteases, cellulases, xylanases, lipases, phospholipases, esterases, cutinases, pectinases, keratinases, reductases, oxidases, phenoloxidases, lipoxygenases, ligninases, pullulanases, tannases, pentosanases, malanases, β-glucanases, arabinosidases, hyaluronidase, chondroitinase, laccase, and amylases, or mixtures thereof. In some embodiments, a combination of enzymes is used (Le., a "cocktail") comprising conventional applicable enzymes like protease, lipase, cutinase and/or cellulase in conjunction with amylase is used. Enzyme Stabilizers - In some embodiments of the present invention, the enzymes used in the detergent formulations of the present invention are stabilized. It is contemplated that various techniques for enzyme stabilization will find use in the present invention. For example, in some embodiments, the enzymes employed herein are stabilized by the presence of water-soluble sources of zinc (II), calcium (II) and/or magnesium (II) ions in the finished compositions that provide such ions to the enzymes, as well as. other metal ions (e.g., barium (II), scandium (II), iron (II), manganese (II), aluminum (III), Tin (II), cobalt (II), copper (II), Nickel (II), and oxovanadium (IV)). Catalytic Metal Complexes — In some embodiments, the cleaning compositions of the present invention contain one or more catalytic metal complexes. In some embodiments, a metal -containing bleach catalyst finds use. In some preferred embodiments, the metal bleach catalyst comprises a catalyst system comprising a transition metal cation of defined bleach catalytic activity, (e.g., copper, iron, titanium, ruthenium, tungsten, molybdenum, or manganese cations), an auxiliary metal cation having little or no bleach catalytic activity
(e.g., zinc or aluminum cations), and a sequestrate having defined stability constants for the catalytic and auxiliary metal cations, particularly ethylenediaminetetraacetic acid, ethylenediaminetetra (methylenephosphonic acid) and water-soluble salts thereof are used (See e.g., U.S. 4,430,243). In some embodiments, the cleaning compositions of the present invention are catalyzed by means of a manganese compound. Such compounds and levels of use are well known in the art (See e.g., U.S. 5,576,282).
In additional embodiments, cobalt bleach catalysts find use in the cleaning compositions of the present invention. Various cobalt bleach catalysts are known in the art (See e.g., U.S. 5,597,936, and U.S. 5,595,967). Such cobalt catalysts are readily prepared by known procedures (See e.g., U.S. 5,597,936, and U.S. 5,595,967).
Li additional embodiments, the cleaning compositions of the present invention include a transition metal complex of a macropolycyclic rigid ligand ("MRL"). As a practical matter, and not by way of limitation, in some embodiments, the compositions and cleaning processes provided by the present invention are adjusted to provide on the order of at least one part per hundred million of the active MRL species in the aqueous washing medium, and in some preferred embodiments, provide from about 0.005 ppm to about 25 ppm, more preferably from about 0.05 ppm to about 10 ppm, and most preferably from about 0.1 ppm to about 5 ppm, of the MRL in the wash liquor. Preferred transition-metals in the instant transition-metal bleach catalyst include, but are not limited to manganese, iron and chromium. Preferred MRLs also include, but are not limited to special ultra-rigid ligands that are cross-bridged (e.g., 5,12-diethyl-l,5,8,12- tetraazabicyclo[6.6.2]hexadecane). Suitable transition metal MRLs are readily prepared by known procedures {See e.g., WO 00/32601, and U.S. 6,225,464).
Processes of Making and Using Cleaning Compositions The cleaning compositions of the present invention are formulated into any suitable form and prepared by any suitable process chosen by the formulator, {See e.g., U.S. 5,879,584, U.S. 5,691,297, U.S. 5,574,005, U.S. 5,569,645, U.S. 5,565,422, U.S. 5,516,448, U.S. 5,489,392, U.S. 5,486,303, U.S. 4,515,705, U.S. 4,537,706, U.S. 4,515,707, U.S. 4,550,862, U.S. 4,561,998, U.S. 4,597,898, U.S. 4,968,451, U.S. 5,565,145, U.S. 5,929,022, U.S. 6,294,514, and U.S. 6,376,445, all of which are incorporated herein by reference for some non-limiting examples).
Method of Use
In preferred embodiments, the cleaning compositions of the present invention find use in cleaning surfaces and/or fabrics. In some embodiments, at least a portion of the surface and/or fabric is contacted with at least one embodiment of the cleaning compositions of the present invention, in neat form or diluted in a wash liquor, and then the surface and/or fabric is optionally washed and/or rinsed. For purposes of the present invention, "washing" includes, but is not limited to, scrubbing, and mechanical agitation. In some embodiments, the fabric comprises any fabric capable of being laundered in normal consumer use conditions. In preferred embodiments, the cleaning compositions of the present invention are used at concentrations of from about 500 ppm to about 15,000 ppm in solution. In some embodiments in which the wash solvent is water, the water temperature typically ranges from about 5 0C to about 900C. hi some preferred embodiments for fabric cleaning, the water to fabric mass ratio is typically from about 1 : 1 to about 30: 1.
EXPERIMENTAL
The following examples are provided in order to demonstrate and further illustrate certain preferred embodiments and aspects of the present invention and are not to be construed as limiting the scope thereof.
In the experimental disclosure which follows, the following abbreviations apply: 0C (degrees Centigrade); rpm (revolutions per minute); H2O (water); HCl (hydrochloric acid); aa and AA (amino acid); bp (base pair); kb (kilobase pair); kD (kilodaltons); gm (grams); μg and ug (micrograms); mg (milligrams); ng (nanograms); μl and ul (microliters); ml (milliliters); mm (millimeters); nm (nanometers); μm and um (micrometer); M (molar); mM (millimolar); μM and uM (micromolar); U (units); V (volts); MW (molecular weight); sec (seconds); min(s) (minute/minutes); hr(s) (hour/hours); MgCl2 (magnesium chloride); NaCl (sodium chloride); OD280 (optical density at 280 nm); OD405 (optical density at 405 nm); OD6oo (optical density at 600 nm); PAGE (polyacrylamide gel electrophoresis); EtOH (ethanol); PBS (phosphate buffered saline [150 mM NaCl, 10 mM sodium phosphate buffer, pH 7.2]); LAS (lauryl sodium sulfonate); SDS (sodium dodecyl sulfate); Tris (tris(hydroxymethyl)aminomethane); TAED (N,N,N'N'-tetraacetylethylenediamine); BES (polyesstersulfone); MES (2-morpholinoethanesulfonic acid, monohydrate; f.w. 195.24; Sigma # M-3671); CaCl2 (calcium chloride, anhydrous; f.w. 110.99; Sigma # C-4901); DMF (N,N-dimethylformamide, f.w. 73.09, d = 0.95); Abz-AGLA-Nba (2-Aminobenzoyl-L- alanylglycyl-L-leucyl-L-alanino-4-nitrobenzylamide, f.w. 583.65; Bachem # H-6675, VWR catalog # 100040-598); SBGl % ("Super Broth with Glucose"; 6 g Soytone [Difco], 3 g yeast extract, 6 g NaCl, 6 g glucose); the pH was adjusted to 7.1 with NaOH prior to sterilization using methods known in the art; w/v (weight to volume); v/v (volume to volume); Npr and npr (neutral metalloprotease); SEQUEST® (SEQUEST database search program, University of Washington); Npr and npr (neutral metalloprotease gene); nprE and NprE (B. amyloliquefaciens neutral metalloprotease); PMN (purified MULTIFECT® metalloprotease); MS (mass spectroscopy); SRI (Stain Removal Index); TIGR (The Institute for Genomic Research, Rockville, MD); AATCC (American Association of Textile and Coloring Chemists); Amersham (Amersham Life Science, Inc. Arlington Heights, IL); Corning (Corning International, Corning, NY); ICN (ICN Pharmaceuticals, Inc., Costa Mesa, CA); Pierce (Pierce Biotechnology, Rockford, IL); Equest (Equest, Warwick International Group, Inc., Flintshire, UK); EMPA (Eidgenossische Material Prufungs und Versuch Anstalt, St. Gallen, Switzerland); CFT (Center for Test Materials, Vlaardingen, The Netherlands); Amicon (Amicon, Inc., Beverly, MA); ATCC (American Type Culture Collection, Manassas, VA); Becton Dickinson (Becton Dickinson Labware, Lincoln Park, NJ); Perkin-Elmer (Perkin-Elmer, Wellesley, MA); Rainin (Rainin Instrument, LLC, Wobura, MA); Eppendorf (Eppendorf AG, Hamburg, Germany); Waters (Waters, Inc., MiIf ord, MA); Geneart (Geneart GmbH, Regensburg, Germany); Perseptive Biosystems (Perseptive Biosystems, Ramsey, MN); Molecular Probes (Molecular Probes, Eugene, OR); BioRad (BioRad, Richmond, CA); Clontech (CLONTECH Laboratories, Palo Alto, CA); Cargill (Cargill, Inc., Minneapolis, MN); Difco (Difco Laboratories, Detroit, MI); GIBCO BRL or Gibco BRL (Life Technologies, Inc., Gaithersburg, MD); New Brunswick (New Brunswick Scientific Company, Inc., Edison, NJ); Thermoelectron (Thermoelectron Corp., Waltham, MA); BMG (BMG Labtech, GmbH, Offenburg, Germany);Greiner (Greiner Bio-One, Kremsmuenster, Austria); Novagen (Novagen, Inc., Madison, WI); Novex (Novex, San Diego, CA); Finnzymes (Finnzymes OY, Finland) Qiagen (Qiagen, Inc., Valencia, CA); Invitrogen (Invitrogen Corp., Carlsbad, CA); Sigma (Sigma Chemical Co., St. Louis, MO); DuPont Instruments (Asheville, NY); Global Medical Instrumentation or GMI (Global Medical
Instrumentation; Ramsey, MN); MJ Research (MJ Research, Waltham, MA); Mors (Infors AG, Bottmingen, Switzerland); Stratagene (Stratagene Cloning Systems, La Jolla, CA); Roche (Hoffmann La Roche, Inc., Nutley, NJ); Agilent (Agilent Technologies, Palo Alto, CA); S-Matrix (S-Matrix Corp., Eureka, CA); US Testing (United States Testing Co., Hoboken, NY); West Coast Analytical Services (West Coast Analytical Services, Inc., Santa Fe Springs, CA); Ion Beam Analysis Laboratory (Ion Bean Analysis Laboratory, The University of Surrey Ion Beam Centre (Guildford, UK); TOM (Terg-o-Meter); BMI (blood, milk, ink); BaChem (BaChem AG, Bubendorf, Switzerland); Molecular Devices (Molecular Devices, Inc., Sunnyvale, CA); Corning (Corning International, Corning, NY); MicroCal (Microcal, Inc., Northhampton, MA); Chemical Computing (Chemical Computing Corp., Montreal, Canada); NCBI (National Center for Biotechnology Information); Argo Bioanalytica (Argo Bioanalytica. Inc, New Jersey); Vydac (Grace Vydac, Hesperia, CA); Minolta (Konica Minolta, Ramsey, NJ); and Zeiss (Carl Zeiss, Inc., Thornwood, NY).
In these experiments, a spectrophotometer was used to measure the absorbance of the products formed after the completion of the reactions. A reflectometer was used to measure the reflectance of the swatches. Unless otherwise indicated, protein concentrations were estimated by Coomassie Plus (Pierce), using BSA as the standard.
The following assays were used in the Examples described below. A. Bradford Assay for Protein Content Determination in 96-well Microtiter Plates (MTPs)
In these assays, the Bradford dye reagent (Quick Start) assay was used to determine the protein concentration in NprE protease samples on MTP scale. In this assay system, the chemical and reagent solutions used were:
Quick Start Bradford Dye Reagent BIO-RAD, #500-0205
Dilution buffer 1OmM NaCl, O.lmM CaC12, 0.005% TWEEN®-80
The equipment used was a Biomek FX Robot (Beckman) and a SpectraMAX (type 340) MTP reader; the MTPs were from Costar (type 9017).
In the test, 200 μl Bradford Dye Reagent was pipetted into each well, followed by 15 μl dilution buffer. Finally 10 μl of filtered culture broth were added to the wells.
After thorough mixing, the MTPs were incubated for at least 10 minutes at room temperature. Possible air bubbles were blown away and the ODs of the wells were read at 595 nm.
To determine the protein concentration, the background reading (i.e., from uninoculated wells) was subtracted form the sample readings. The obtained OD595 values provide a relative measure of the protein content in the samples. The linearity of the NprE calibration lines between 0 to 5 μg enabled the use of OD595 nm values as a relative measure for the protein content. As the expected content of NprE in supernatant was 200-300 μg/ml, the lOμl sample volume used in the test contains less than 5 μg protein, providing values in the linear range.
B; Microswatch Assay for Testing Protease Performance
The detergents used in this assay did not contain enzymes. The equipment used was a Biomek FX Robot (Beckman) and a SpectraMAX (type 340) MTP reader; the MTPs were from Costar (type 9017).
Detergent Preparation (cold water liquid detergent; US conditions): Milli-Q water was adjusted to 6 gpg water hardness (Ca/Mg=3/1), and 0.78 g/1 TIDE® 2007-2x detergent was added. The detergent solution was vigorously stirred for at least 15 minutes. Then. 5 mM HEPES (free acid) was added and the pH adjusted to 8.2.
Microswatches
Microswatches of VA" circular diameter were obtained from CFT. Before cutting of the swatches, the fabric (EMPA 116) was washed with water. Two microswatches were placed in each well of a 96-well microtiter plate vertically to expose the whole surface area (i.e., not flat on the bottom of the well).
Test Method
The incubator was set to 20°C. The filtered culture broth samples were tested at an appropriate concentration by dilution with a mixture of 10 mM NaCl, 0.1 mM CaC12 and 0.005% TWEEN®-80 solution. The desired detergent solution was prepared as described above. Then, 190 μl of detergent solution was added to each well of the MTP, containing microswatches. To this mixture, 10 μl of the diluted enzyme solution were added (to provide a total volume of 200 μl/well). The MTP was sealed with tape and placed in the incubator for 30 minutes, with agitation at 1400 rpm. Following incubation under the appropriate conditions, 100 μl of solution from each well were removed and placed into a fresh MTP. The new MTP containing 100 μl of solution/well was read at 405 nm in a MTP reader. Blank controls, as well as a control containing two microswatches and detergent but no enzyme were also included.
Calculation of the BMI Performance: The obtained absorbance value was corrected for the blank value (i.e., obtained after incubation of microswatches in the absence of enzyme). The resulting absorbance was a measure for the hydrolytic activity. For each sample (e.g., nprE or variant) the performance ' index was calculated. The performance index compared the performance of the variant (actual value) and the standard enzyme (theoretical value) at the same protein concentration. In addition, the theoretical values were calculated, using the parameters of the Langmuir equation of the standard enzyme. A performance index (PI) that is greater than 1 (PI>1) identified a better variant (as compared to the standard [e.g., wild-type]), while a PI of 1 (PI=I) identified a variant that performed the same as the standard, and a PI that is less than 1 (PI<1) identified a variant that performed worse than the standard. Thus, the PI identified winners, as well as variants that are less desirable for use under certain circumstances.
C. Citrate Stability Assay for NprE protease.
Citrate stability was measured after incubation of wild-type NprE and variants in the presence of 50 mM citrate. The initial and residual activity was determined using the DMC hydrolysis assay. In this assay system, the chemical and reagent solutions used were:
Citric acid monohydrate Merck 1.00244
Pipes (free acid) Sigma P-1851
Tris (free acid) Sigma T- 1378 HEPES (Ultra>99.5%) Sigma-H7523
TWEEN®-80 Sigma P-8074
Dimethylcasein(DMC) Sigma C-9801
Tris buffer (free acid) 6.04 g dissolved in 1000 ml water (= 50 mM)
HEPES buffer 11.9 g. dissolved in 1000 ml water (= 50 mM) Citrate buffer (free acid) 21.0 g. dissolved in 1000 ml water (= 100 mM),
PIPES buffer (free acid): 3.32 g dissolved in about 960 ml water,
DMC solution 1 % w/v in 55 mM PIPES buffer, final pH = 6.0
Dilution buffer 1 0.1 mM CaC12/25 mM Tris; pH 8.2
Dilution buffer 2 0.1 mM CaC12/50 mM Citrate/25 mM Tris; pH8.2
The concentrations of these dilution buffers are indicated as final concentrations. The initial concentration was proportionally higher and dependent on the dilution rate. The initial concentration was proportionally higher and dependent on the dilution rate. In alternative experiments, HEPES finds use in exchange for Tris. The equipment used was a Biomek FX Robot (Beckman), and an incubator/shaker (Innova, type 4230; New Brunswick). The
PIPES buffer was adjusted to pH 5.8 with 4 N HCl (final concentration of 55 mM). The Tris buffer was adjusted to pH 8.2 with 4 N HCl (final concentration of 25 mM). The 50 mM citrate/25 mM Tris buffer was adjusted to pH 8.2 with 4 N NaOH. The HEPES buffer was adjusted to pH 8.2 with 4 N NaOH (final concentration of 25 mM). The 50 raM citrate/25 mM HEPES buffer was adjusted to pH 8.2 with 4 N NaOH.
Protein Determination In order to establish the desired dilution rate in the citrate stability assay the protease concentration of the wild-type NprE controls for each plate were determined with the TCA assay. In this method, 25 μl filtered culture broth were added to 200 μl 16.875% (w/v) TCA. After incubation for 10 to 15 minutes at ambient temperature, the light scattering/absorbance at 405 nm was determined. The protein concentration was determined by using a calibration line, constructed with purified NprE.
Test Method
The dilution rate of the filtered culture broth was determined using the TCA assay, as described above.
Stressed Conditions:
The filtered culture broth was diluted with dilution buffer 2. The MTP was covered with tape, shaken for a few seconds and placed in the incubator at 25°C for 60 minutes at 200 rpm. After incubation, 20μl of the mixture were taken from each well and transferred into a new MTP, containing 180 μl 1 % DMC preheated substrate solution (the substrate was preheated at 25°C). The MTP was placed directly in the incubator/shaker and incubated at
25°C for 30 minutes at 200 rpm agitation. The residual protease activity was determined using the dimethylcasein hydrolysis assay, described below.
Unstressed Conditions
The filtered culture broth was diluted with dilution buffer 1. Immediately, 20μl of the mixture were taken from each well and transferred into a new MTP, containing 180 μl of preheated 1% DMC substrate solution (the substrate was preheated at 25°C). The MTP was placed directly in the incubator/shaker and incubated for 25°C for 30 minutes at 200 rpm agitation. The initial protease activity as determined with TNBS, using the dimethylcasein hydrolysis assay, described below. All residual activity values (determined with the dimethylcasein hydrolysis assay) were calculated using the following equation.
% Residual Activity = OD6omin value * 100/OD0omin value
D. Dimethylcasein Hydrolysis Assay
In this assay system, the chemicals and reagent solutions used were:
Dimethylcasein (DMC) Sigma C-9801
TWEEN®-80 Sigma P-8074
PIPES buffer (free acid) Sigma P-1851; 15.1 g dissolved in about 960 ml water; pH adjusted to 6.0 with 4N NaOH, 1 ml of 5% TWEENO-80 added and the volume brought up to 1000 ml. Final concentration of PIPES and TWEEN®-80: 50 mM and 0.005% respectively.
Picrylsulfonic acid (TNBS) Sigma P-2297 (5% solution in water) Reagent A 45.4 g Na2B4O7JO H2O (Merck 6308) and
15 ml of 4N NaOH dissolved together to a final volume of 1000 ml (by heating if needed)
Reagent B 35.2 g NaH2PO4. IH2O (Merck 6346) and 0.6 g Na2Sθ3 (Merck 6657) dissolved together to a final volume of 1000 ml.
Method
To prepare the substrate, 4 g dimethylcasein was dissolved in 400 ml PIPES buffer. The filtered culture supernatants were diluted with PIPES buffer. Then, 10 μl of each diluted supernatant were added to 200 μl substrate in the wells of a MTP. The MTP was covered with tape, shaken for a few seconds and placed in an oven at 250C for 30 minutes without agitation. About 15 minutes before removal of the 1st plate from the oven, the TNBS reagent was prepared by mixing 1 ml TNBS solution per 50 ml of Reagent A. MTPs were filled with 60 μl TNBS Reagent A per well. The incubated plates were shaken for a few seconds, after which 10 μl was transferred to the MTPs with TNBS Reagent A. The plates were covered with tape and shaken for 20 minutes in a bench shaker (BMG Thermostar) at room temperature and 500 rpm. Finally, 200 μl Reagent B was added to the wells, mixed for 1 minute on a shaker, and the absorbance at 405 nm was determined using a MTP reader. The obtained absorbance value was corrected for the blank value (Le., substrate without enzyme). The resulting absorbance was a measure of the hydrolytic activity. The (arbitrary) specific activity of a sample was calculated by dividing the absorbance and the determined protein concentration.
E. TIDE® Stability Assay
The stability of NprE and variants was measured after an incubation step in the presence of 25% TIDE® compact detergent. The initial and residual activity was determined using the AGLA-assay described below. The equipment used was a Biomek FX Robot (Beckman), a fluorescence meter (FLUOstar Optima; BMG), an incubator/shaker (iEMS; Thermoelectron) and an incubator/shaker (Innova; New Brunswick (type 4230)); the MTPs were from Costar (type 9017) and from Greiner (black plates, type 655076).
Chemicals and reagents:
In this assay system, the chemical and reagent solutions used were:
TIDE®-compact detergent With and without DTPA TIDE®-conipact detergent solution 125 g TIDE®-compact dissolved in a mixture of 50 of 50 mM HEPES pH 8.2 and 275 ml water; concentration of TIDE® was 27.7%, after dilution with supernatant 25 % MES dilution buffer 52.6 mM MES/NaOH, 2.6 mM CaCI2, 0.005%
TWEEN®-80, pH 6.5
AGLA substrate BaChem, cat no. H-6675 or American Peptide Company, cat no. 81-0-31 AGLA substrate solution 451 mg of AGLA dissolved in 16 ml N,N- dimethylformamide; this solution was poured into 304 ml of MES-buffer
(52.6 mM MES/NaOH, 2.6 mM CaCl2, 0.005% TWEEN®-80, pH 6.5) with stirring
Test method:
Unstressed conditions: First, 20 μ] filtered culture broth was diluted with 180 μl MES dilution buffer. Then,
20 μl of this diluted broth was diluted with 180 μl MES dilution buffer. Then, 10 μl of this dilution was diluted with 190 μl AGLA-substrate solution in a pre-warmed plate at 25°C. Any air bubbles present were blown away and the plate was measured according to the AGLA protease assay protocol.
Stressed conditions:
First, 20 μl filtered culture broth was diluted with 180 μl TIDE®-compact detergent solution without DTPA and after premising in the iEMS shaker for 5 minutes, were incubated further in the Innova shaker. The plate was incubated for a total of 60 minutes at 32°C, at 200 rpm. In addition, 20 ul filtered culture broth were diluted with 180 ul TIDE®- compact detergent solution with DTPA and after premixing in the iEMS shaker for 5 minutes, were incubated further in the Innova shaker. The plate was incubated for a total of 40 minutes at 200C, at 200 rpm. Then, 20 μl of either of these solutions were diluted with 180 μl MES dilution buffer and 10 μl of this dilution were diluted with 190 μl AGLA- substrate solution in a pre-warmed plate at 250C. Any air bubbles present were blown away and the plate was measured according to the AGLA protease assay protocol. .
Calculations:
Fluorescence measurements were taken at excitation of 350 nm and emission of 415 nm. The spectrofluorometer software calculated the reaction rates of the increase in fluorescence for each well to a linearly regressed line of milli-RFU / min: Percentage of residual activity: (Slope of stressed condition) * 100
(Slope of unstressed condition)
F. 2-Am]*nobenzoyl-L-alanylglvcyI-L-IeucyI-L-alanino-4-nitrobenzvIaπiide Protease Assay (Abz-AGLA-Nba)
The method provided below provides a degree of technical detail that yields reproducible protease assay data independent of time and place. While the assay can be adapted to a given laboratory condition, any data obtained through a modified procedure must be reconciled with results produced by the original method. Neutral metalloproteases cleave the peptide bond between glycine and leucine of 2-aminobenzoyl-L-alanylglycyl-L- leucyl-L-alanino-4-nitrobenzylamide (Abz-AGLA-Nba). Free 2-aminobenzoyl-L- alanylglycine (Abz-AG) in solution has a fluorescence emission maximum at 415 nm with an excitation maximum of 340 nm. Fluorescence of Abz-AG is quenched by nitrobenzylamide in the intact Abz-AGLA-Nba molecule.
In these experiments, the liberation of Abz-AG by protease cleavage of Abz-AGLA- Nba was monitored by fluorescence spectroscopy (Ex. 340 / Em. 415). The rate of appearance of Abz-AG was a measure of proteolytic activity. Assays were performed under non-substrate limited initial rate conditions.
A microplate mixer with temperature control (e.g., Eppendorf Thermomixer) was required for reproducible assay results. The assay solutions were incubated to desired temperature (e.g., 250C) in the microplate mixer prior to enzyme addition. Enzyme solutions were added to the plate in the mixer, mixed vigorously and rapidly transferred to the plate reader.
A spectrofluorometer with capability of continuous data recording, linear regression analysis, and with temperature control was required (e.g., SpectraMax M5, Gemini EM, Molecular Devices). The reader was always maintained at the desired temperature (e.g., 25°C). The reader was set for top-read fluorescence detection and the excitation was set to 350 nm and emission to 415 nm without the use of a cut-off filter. The PMT was set to medium sensitivity and 5 readings per well. Autocalibration was turned on, but only to calibrate before the first reading. The assay was measured for 3 minutes with the reading interval minimized according to the number of wells selected to be monitored. The reader was set to calculate the rate of milli-RFU/min (thousandths of relative fluorescence units per minute). The number of readings used to calculate the rate (Vmax points) was set to the number equivalent to 2 minutes, as determined by the reading interval (e.g., a reading every 10 seconds would use 12 points to calculate the rate). The max RFU was set to 50,000.
All pipeting of enzyme and substrate stock solutions were done with positive displacement pipets (Rainin Microman). Buffer, assay, and enzyme working solutions were pipetted by single or multi-channel air-displacement pipets (Rainin LTS) from tubes, reagent reservoirs or stock microplates. A repeater pipet (Eppendorf) finds use in transferring the assay solution to microplate wells when few wells are used, to minimize reagent loss. Automated pipetting instruments such as the Beckman FX or Cybio Cybi-well also find use in transferring enzyme solutions from a working stock microplate to the assay microplate in order to initiate an entire microplate at once.
Reagents and Solutions:
52.6 niM MES/NaOH, 2.6 niM CaCl2, pH 6.5 - MES Buffer
MES acid (10.28 g) and 292 mg anhydrous CaCl2 were dissolved in approximately 90OmL purified water. The solution was titrated with NaOH to pH 6.5 (at 25°C or with temperature adjustment pH probe). The pH-adjusted buffer was made up to IL total volume. The final solution was filtered through a 0.22 μm sterile filter and kept at room temperature.
48 niM Abz-AGLA-Nba in DMF - Abz-AGLA-Nba Stock Approximately 28 mg of Abz-AGLA-Nba was placed in a small tube. It was dissolved in mL of DMF (volume will vary depending upon Abz-AGLA-Nba massed) and vortexed for several minutes. The solution was stored at room temperature shielded from light.
5O mM MES, 2.5 niM CaCl2, 5% DMF, 2.4 niM Abz-AGLA-Nba pH 6.5 - Assay Solution One mL Abz-AGLA-Nba stock was added to 19 mL MES Buffer and vortexed. The solution was stored at room temperature shielded from light.
50 niM MES, 2.5 mM CaCl2, pH 6.5 - Enzyme Dilution Buffer This buffer was produced by adding 5 mL purified water to 95 mL MES Buffer.
50 mM MES, 2.5 mM CaCl2, 5% DMF, pH 6.5 - Substrate Dilution Buffer
Five mL pure DMF were added to 95 mL MES Buffer. This buffer was used to determine kinetic parameters.
Enzyme solutions
The enzyme stock solutions were diluted with enzyme dilution buffer to a concentration of approximately 1 ppm (1 ug/mL). MULTTFECT® neutral protease (wild- type NprE) was diluted to concentrations below 6 ppm (6 ug/mL). Serial dilutions were preferred. Solutions were stable at room temperature for 1 hour, but for longer term storage, the solutions were maintained on ice.
Procedure
Fist all buffers, stock, and working solutions were prepared. Each enzyme dilution was assayed in triplicate, unless otherwise indicated. When not completely full, the enzyme working solution stock microplate was arranged in full vertical columns starting from the left of the plate (to accommodate the plate reader). The corresponding assay plate was similarly set up. The microplate spectrofluorometer was set up as previously described.
First, a 200 uL aliquot of assay solution were placed in the wells of a 96-well microplate. The plate was incubated for 10 min at 25°C in a temperature controlled microplate mixer, shielded from light. The assay was initiated by transferring 10 uL of the working enzyme solutions from the stock microplate to the assay microplate in the mixer. Optimally, 96-well pipetting head finds use, or an 8-well multi-channel pipet was used to transfer from the left-most column first. The solutions were vigorously mixed for 15 seconds (900rpm in Eppendorf Thermomixer). Immediately, the assay microplate was transferred to the microplate spectrofluorometer and recording of fluorescence measurements at excitation of 350 nm and emission of 415 nm were begun. The spectrofluorometer software calculated the reaction rates of the increase in fluorescence for each well to a linearly regressed line of milli-RFU / min. In some experiments, a second plate was placed in the microplate mixer for temperature equilibration while the first plate was being read.
The rate initial velocities were linear with respect to product concentration (i.e., liberated 2-aminobenzoyl fluorescence) up to 0.3 mM product, which corresponded to approximately 50,000 RFU in a solution starting at 2.3mM Abz-AGLA-Nba with background fluorescence of approximately 22,000 RFU. Abz-AGLA-Nba was dissolved in DMF and was been used the day it was prepared.
DETERGENT COMPOSITIONS:
In the exemplified detergent compositions, the enzymes levels are expressed by pure . enzyme by weight of the total composition and unless otherwise specified, the detergent ingredients are expressed by weight of the total compositions. The abbreviated component identifications therein have the following meanings:
Abbreviation Ingredient
LAS ; Sodium linear Cj i_23 alkyl benzene sulfonate.
NaC16-17HSAS : Sodium C^17 highly soluble alkyl sulfate
TAS : Sodium tallow alkyl sulphate.
CxyAS : Sodium C1x - C1^ alkyl sulfate.
CxyEz : Cjx - C1^ predominantly linear primary alcohol condensed with an average of z moles of ethylene oxide. CxyAEzS : C1x - C^y sodium alkyl sulfate condensed with an average of z moles of ethylene oxide. Added molecule name in the examples.
Nonionic : Mixed ethoxylated/propoxylated fatty alcohol e.g. Plurafac LF404 being an alcohol with an average degree of ethoxylation of 3.8 and an average degree of propoxylation of 4.5.
QAS : R2.N+(CH3)2(C2H4OH) with R2 = C12-C14.
Silicate : Amorphous Sodium Silicate (SiO2:Na2O ratio = 1.6-3.2:1).
Metasilicate : Sodium metasilicate (SiO2:Na2O ratio = 1.0).
Zeolite A : Hydrated Aluminosilicate of formula Na12(AlO2SiO2)12. 27H2O SKS-6 Crystalline layered silicate of formula δ-Na2Si2U5
Sulfate Anhydrous sodium sulphate. STPP Sodium Tripolyphosphate.
MA/AA Random copolymer of 4:1 acrylate/maleate, average molecular weight about 70,000-80,000.
AA Sodium polyacrylate polymer of average molecular weight 4,500. Polycarboxylate Copolymer comprising mixture of carboxylated monomers such as acrylate, maleate and methyacrylate with a MW ranging between
2,000-80,000 such as Sokolan commercially available from BASF, being a copolymer of acrylic acid, MW4,500.
BBl 3-(3,4-Dihydroisoquinolinium)propane sulfonate BB2 l-(3,4-dihydroisoquinolinium)-decane-2-sulfate PBl Sodium perborate monohydrate. PB4 Sodium perborate tetrahydrate of nominal formula NaBθ3.4H2θ.
Percarbonate Sodium percarbonate of nominal formula 2Na2Cθ3.3H2U2 .
TAED Tetraacetyl ethylene diamine. NOBS Nonanoyloxybenzene sulfonate in the form of the sodium salt. DTPA Diethylene triamine pentaacetic acid. HEDP 1,1 -hydroxy ethane diphosphonic acid. DETPMP Diethyltriamine penta (methylene) phosphonate, marketed by
Monsanto under the Trade name Dequest 2060.
EDDS Ethylenediamine-N,N'-disuccinic acid, (S,S) isomer in the form of its sodium salt Diamine Dimethyl aminopropyl amine; 1,6-hezane diamine; 1,3-propane diamine; 2-methyl-l,5-pentane diamine; 1,3-pentanediamine; 1- methyl-diaminopropane.
DETBCHD 5, 12- diethyl-l,5,8,12-tetraazabicyclo [6,6,2] hexadecane, dichloride, Mn(II) SALT
PAAC Pentaamine acetate cobalt(IH) salt. Paraffin Paraffin oil sold under the tradename Winog 70 by Wintershall. Paraffin Sulfonate A Paraffin oil or wax in which some of the hydrogen atoms have been replaced by sulfonate groups.
Aldose oxidase Oxidase enzyme sold under the tradename Aldose Oxidase by
Novozymes A/S Galactose oxidase Galactose oxidase from Sigma
nprE The recombinant form of neutral metalloprotease expressed in Bacillus subtilis.
PMN Purified neutral metalloprotease from Bacillus amyloliquefacients. Amylase Amylolytic enzyme sold under the tradename PURAFECT ® Ox described in WO 94/18314, WO96/05295 sold by Genencor;
NATALASE®, TERMAMYL®, FUNGAMY1® and DURAMYL™, all available from Novozymes A/S. Lipase Lipolytic enzyme sold under the tradename LIPOLASE®, L1POLASE® Ultra by Novozymes A/S and Lipomax™ by Gist- Brocades.
Cellulase Cellulytic enzyme sold under the tradename Carezyme, Celluzyme and/or Endolase by Novozymes A/S. Pectin Lyase PECTAWAY® and PECTAWASH® available from Novozymes
A/S.
PVP Polyvinylpyrrolidone with an average molecular weight of 60,000 PVNO Polyvinylpyridine-N-Oxide, with an average molecular weight of
50,000.
PVPVI Copolymer of vinylimidazole and vinylpyrrolidone, with an average molecular weight of 20,000.
Brightener 1 Disodium 4,4'-bis(2-sulphostyryl)biphenyl. Silicone antifoam Polydimethylsiloxane foam controller with siloxane-oxyalkylene copolymer as dispersing agent with a ratio of said foam controller to said dispersing agent of 10:1 to 100:1.
Suds Suppressor 12% Silicone/silica, 18% stearyl alcohol, 70% starch in granular form.
SRP l Anionically end capped poly esters. PEG X Polyethylene glycol, of a molecular weight of x. PVP K60 ® Vinylpyrrolidone homopolymer (average MW 160,000) Jeffamine ® ED-2001 Capped polyethylene glycol from Huntsman Isachem ® AS A branched alcohol alkyl sulphate from Enichem MME PEG (2000) Monomethyl ether polyethylene glycol (MW 2000) from Fluka
Chemie AG.
DC3225C Silicone suds suppresser, mixture of Silicone oil and Silica from
Dow Corning.
TEPAE Tetreaethylenepentaamine ethoxylate.
BTA Benzotriazole.
Betaine (CHa)3N+CH2COO-
Sugar Industry grade D-glucose or food grade sugar
CFAA C12-C alkyl N-methyl glucamide
TPKFA C12-C14 topped whole cut fatty acids. Clay A hydrated aluminumu silicate in a general formula
Al2O3SiO2-XH2O. Types: Kaolinite, montmorillonite, atapulgite, illite, bentonite, halloysite. pH Measured as a 1% solution in distilled water at 200C.
EXAMPLE 1 Cloning of the Neutral Metalloprotease Gene from B. amyloliquefaciens.
In this Example, methods used to clone the B. amyloliquefaciens neutral metalloprotease gene are described. The gene-encoding neutral metalloprotease was cloned from B. amyloliquefaciens using well-established methods in this art. The non-exempt (Le., the strain carries extrageneric DNA (besides the chloramphenicol selectable marker which is allowed in an exempt strain), specifically the plasmid pJM102 sequences) strain BC91504 (aprE/nprE-pJM!02 in BG3594::comK) carries the B. subtilis aprE promoter and signal sequence fused to B. amyloliquefaciens nprE propeptide/mature gene in integrating plasmid pJM102.
The following two sequences (SEQ ID NO:1 and SEQ ID NO:2) of B. subtilis and B. amyloliquefaciens were generated via PCR with the oligonucleotide primers corresponding to the underlined sequences.
B subtilis chromosomal EcόRI restriction site (GAATTC) and aprE start codon (GTG) and B. amyloliquefaciens nprE stop codon are shown in the following sequences in boldface type as well as a synthetically introduced HmdIH restriction site (AAGCTT) designed into primer # 4.
The B. amyloliquefaciens aprE 5' upstream sequence, promoter and signal sequence coding region are shown in the following sequence (SEQ ID NO:1). Primer 1 (apr-f; GAGCTGGGTAAAGCCTATGAAT; SEQ ID NO:5) is shown underlined, at the beginning of the sequence, while the aprE portion of primers 2 and 3 (npr-f and npr-r; GTTCAGCAACATGTCTGCGCAGGCT; SEQ ID NO:6) are shown double underlined at the end of the sequence.
GAGCTGGGTAAAGCCTATGAATTCTCCATTTTCTTCTGCTATCAAAATAACAGAC TCGTGATTTTCCAAACGAGCTTTCAAAAAAGCCTCTGCCCCTTGCAAATCGGATG CCTGTCTATAAAATTCCCGATATTGGTTAAACAGCGGCGCAATGGCGGCCGCATC TGATGTCTTTGCTTGGCGAATGTTCATCTTATTTCTTCCTCCCTCTCAATAATTTTT TCATTCTATCCCTTTTCTGTAAAGTTTATTTTTCAGAATACTTTTATCATCATGCTT TGAAAAAATATCACGATAATATCCATTGTTCTCACGGAAGCACACGCAGGTCATT TGAACGAATTTTTTCGACAGGAATTTGCCGGGACTCAGGAGCATTTAACCTAAAA AAGCATGACATTTCAGCATAATGAACATTTACTCATGTCTATTTTCGTTCTTTTCT GTATGAAAATAGTTATTTCGAGTCTCTACGGAAATAGCGAGAGATGATATACCTA AATAGAGATAAAATCATCTCAAAAAAATGGGTCTACTAAAATATTATTCCATCTA TTACAATAAATTCACAGAATAGTCTTTTAAGTAAGTCTACTCTGAATTTTTTTAAA AGGAGAGGGTAAAGAGTGAGAAGCAAAAAATTGTGGATCAGCTTGTTGTTTGCG TTAACGTTAATCTTTACGATGGCGTTCAGCAACATGTCTGCGCAGGCT (SEQ ID NO:1)
The sequence of the B. amyloliquefaciens propeptide and mature nprE coding sequence and transcription terminator are provided in the sequence below. In this sequence, the nprE portion of primers 2 and 3 is underlined (GCTGAGAATCCTCAGCTTAAAGAAAACCTG; SEQ ID NO:7), while the npr-r portion of primer 4
(GGCTTCACCATGATCATATATGTCAAGCTTGGGGGG; SEQ ID NO:8) is shown double underlined.
GCTGAGAATCCTCAGCTTAAAGAAAACCTGACGAATTTTGTACCGAAGCATTCTT TGGTGCAATCAGAATTGCCTTCTGTCAGTGACAAAGCTATCAAGCAATACTTGAA ACAAAACGGCAAAGTCTTTAAAGGCAATCCTTCTGAAAGATTGAAGCTGATTGA CCAAACGACCGATGATCTCGGCTACAAGCACTTCCGTTATGTGCCTGTCGTAAAC GGTGTGCCTGTGAAAGACTCTCAAGTCATTATTCACGTCGATAAATCCAACAACG
TCTATGCGATTAACGGTGAATTAAACAACGATGTTTCCGCCAAAACGGCAAACAG CAAAAAATTATCTGCAAATCAGGCGCTGGATCATGCTTATAAAGCGATCGGCAA ATCACCTGAAGCCGTTTCTAACGGAACCGTTGCAAACAAAAACAAAGCCGAGCT GAAAGCAGCAGCCACAAAAGACGGCAAATACCGCCTCGCCTATGATGTAACCAT CCGCTACATCGAACCGGAACCTGCAAACTGGGAAGTAACCGTTGATGCGGAAAC
AGGAAAAATCCTGAAAAAGCAAAACAAAGTGGAGCATGCCGCCACAACCGGAA CAGGTACGACTCTTAAAGGAAAAACGGTCTCATTAAATATTTCTTCTGAAAGCGG CAAATATGTGCTGCGCGATCTTTCTAAACCTACCGGAACACAAATTATTACGTAC GATCTGCAAAACCGCGAGTATAACCTGCCGGGCACACTCGTATCCAGCACCACA AACCAGTTTACAACTTCTTCTCAGCGCGCTGCCGTTGATGCGCATTACAACCTCG GCAAAGTGTATGATTATTTCTATCAGAAGTTTAATCGCAACAGCTACGACAATAA AGGCGGCAAGATCGTATCCTCCGTTCATTACGGCAGCAGATACAATAACGCAGCC TGGATCGGCGACCAAATGATTTACGGTGACGGCGACGGTTCATTCTTCTCACCTC TTTCCGGTTCAATGGACGTAACCGCTCATGAAATGACACATGGCGTTACACAGGA AACAGCCAACCTGAACTACGAAAATCAGCCGGGCGCTTTAAACGAATCCTTCTCT GATGTATTCGGGTACTTCAACGATACTGAGGACTGGGATATCGGTGAAGATATTA CGGTCAGCCAGCCGGCTCTCCGCAGCTTATCCAATCCGACAAAATACGGACAGCC TGATAATTTCAAAAATTACAAAAACCTTCCGAACACTGATGCCGGCGACTACGGC GGCGTGCATACAAACAGCGGAATCCCGAACAAAGCCGCTTACAATACGATTACA AAAATCGGCGTGAACAAAGCGGAGCAGATTTACTATCGTGCTCTGACGGTATACC TCACTCCGTCATCAACTTTTAAAGATGCAAAAGCCGCTTTGATTCAATCTGCGCG GGACCTTTACGGCTCTCAAGATGCTGCAAGCGTAGAAGCTGCCTGGAATGCAGTC GGATTGTAAACAAGAAAAGAGACCGGAAATCCGGTCTCTTTTTTATATCTAAAAA CATTTCACAGTGGCTTCACCATGATCATATATGTCAAGCTTGGGGGG (SEQ K) NO:2)
The amino acid sequence of the full-length NprE (pre-, pro- and mature sequence) is provided below:
MGLGKKLSVAVAASFMSLTISLPGVQAAENPQLKENLTNFVPKHSLVQSELPSVSDK AKQYLKQNGKVKGNPSERLKLIDQTTDDLGYKHFRYVPVVNGVPVKDSQVΠHVDK SNNVYAINGELNNDVSAKTANSKKLSANQALDHAYKAIGKSPEAVSNGTVANKNKA ELKAAATKDGKYRLAYDVTIRYIEPEPANWEVTVDAETGKILKKQNKVEHAATTGT
GTTLKGKTVSLNISSESGKYVLRDLSKPTGTQΠTYDLQNRE YNLPGTLVSSTTNQFTT ssQRAA VDAHYNLGKVYDYFYQKFNRNSYDNKGGKΓVSSVHYGSRYNNAAWIGDQ MIYGDGDGSFFSPLSGSMDVTAHEMTHGVTQETANLNYENQPGALNESFSDVFGYF NDTEDWDIGEDITVSQPALRSLSNPTKYGQPDNFKNYKNLPNTDAGDYGGVHTNSGI PNKAA YNTΓΓKIGVNKAEQIYYRALTVYLTPSSTFKD AKAALIQSARDLYGSQDAAS VEAAWNAVGL (SEQ ID NO:3)
In some alternative embodiments, the following NprE sequence finds use in the present invention. VRSKKLWISLLFALTLIFTMAFSNMSAQAAENPQLKENLTNFVPKHSLVQSELPSVSD KAIKQYLKQNGKVFKGNPSERLKLIDQTTDDLGYKHFRYVPVVNGVPVKDSQVΠHV DKSNNVYAINGELNNDVSAKTANSKKLSANQALDHAYKAIGKSPEAVSNGTVANKN KAELKAAATKDGKYRLA YDVTIRY1EPEPANWEVTVDAETGKILKKQNK VEHAATT GTGTTLKGKTVSLNISSESGKYVLRDLSKPTGTQΠTYDLQNREYNLPGTLVSSTTNQF TTSSQRAAVD AHYNLGKVYDYFYQKFNRNSYDNKGGKWSSVHYGSRYNNAAWIG DQMIYGDGDGSFFSPLSGSMDVTAHEMTHGVTQETANLNYENQPGALNESFSDVFG YFNDTEDWDIGEDITVSQPALRSLSNPTKYGQPDNFKNYKNLPNTDAGDYGGVHTN SGBPNKAA YNTITKIGVNKAEQΓYYRALTVYLTPSSTFKDAKAALIQSARDLYGSQDA
ASVEAAWNAVGL (SEQ ID NO:4)
The primer sequences used in these PCR experiments are provided below:
Figure imgf000079_0001
Primers 2 and 3 are reverse complements of each other and correspond to either non- coding (#2) or coding (#3) strands of the chromosomal DNAs. For the coding strand, they correspond to the last 25 base pairs of the aprE signal sequence and the first 30 base pairs of the nprE propeptide. Primer #4 is the reverse complement to the underlined sequence, comprising 24 base pairs 3' of the nprE stop codon and terminator with an introduced HircdHI site preceded by six dCTP residues, to provide a so-called "clamp," allowing more efficient cleavage with HmdIH restriction endonuclease, as some restriction enzymes cleave inefficiently if their recognition sequence is located at the very ends of DNA fragments. The two PCR fragments were generated with the following protocol and reagents (except DNA template and oligonucleotide primers) from Applied Biosystems' rTTH DNA Polymerase, XL Kit:
40.6 μl H2O
30 μ\ 33x rTth PCR buffer 10 μl 2 mM dNTP mix 4.4 μl 25 mM Mg-acetate 5 μl 50 μM primer # 1 or # 3 (forward primers) 5 μl 50 μM primer # 2 or # 4 (reverse primers)
2 μl B. subtilis or B. amyloliquefaciens chromosomal DNA 2 μl τTth polymerase 1 μl Pfu Turbo polymerase 100 μl total reaction volume
The PCR conditions used in these experiments were (95°C, 30 sec./58°C,
30sec/68°C, 1 min.) x 30 cycles followed by rapid cooling to 4°C. Reactions were run on 1.2% agarose/TBE preparative gels, the appropriately-sized fragments excised and purified using the QIAGEN® Gel Extraction Kit. In a second fusion, PCR reactions were conducted in which chromosomal DNAs were replaced by 1 ul each of the two separate fragments and only outside primers #s 1 and #2 were used. The same PCR conditions as described above were used. Due to the complementary ends formed on the two fragments from the use of complementary primers 2 and 3 in the first PCRs, the two fragments were precisely fused. The fusion fragment was digested with EcoRI and Hind/// and gel purified as described above. The integration plasmid pJM102 was also digested with EcoRI and Hmdiπ, and the linear plasmid was then gel purified and ligated by standard techniques to the digested apr/npr fusion fragment. This ligation reaction was subsequently used to directly transform a xylose-induced B. subtilis strain.
After purification, the two fragments were generated by PCR with primers 1 and 2 from wild-type B. subtilis chromosomal DNA, and with primers 3 and 4 from chromosomal DNA from a B. amyloliquefaciens strain. This fragment was again purified as descried above, followed by cutting with EcoRI and HindΩI as in the same digestion of the integrating plasmid pJM102 and subsequent ligation of the fusion fragment to the plasmid. Several transformants had the fusion sequenced from the chromosome to verify the absence of any PCR-derived mutations. One of these was then amplified stepwise from 5 - 25 mg/mL chloramphenicol, the selectable marker on pJM102, to co-amplify the linked expression cassette.
The selected sequence verified transformant was obtained by selection for pJM102's chloramphenicol (CMP) resistance marker on LB/agar plates containing 5 mg/ml CMP. This was then inoculated into LB broth at 10 mg/ml CMP overnight at 37°C, with shaking at 250 RPM. This culture was then streaked onto LB/agar plates with 10 mg/ml CMP to isolate single colonies. One colony was then inoculated into LB broth at 25 mg/ml CMP overnight at 37°C, with shaking at 250 RPM. This culture was then streaked to LB/agar plates with 25 mg/ml CMP to isolate single colonies. These colonies were harvested and stored in glycerol at -700C until use, as known in the art.
The deletion of the two non-essential proteases present in B. subtilis (aprE and nprE), as well as amylase, reduced the total extracellular protease level during the production of metall oprotease. The DNA encoding the neutral metal! oprotease was cloned into an amylase- deleted host. The inducible comK for competence development was inserted in the middle of the amylase locus, making the strain "amyV The secretion of the expressed protein was ensured by insertion of the nucleotides encoding the signal sequence prior to the coding sequence of the gene.
EXAMPLE 2
Expression and Fermentation of the Purified MULTIFECT® Neutral and Recombinant Neutral Metalloprotease (nprE).
The recombinant Bacillus subtilis produced as described in Example 1 was cultivated by conventional batch fermentation in a nutrient medium as described below. One glycerol vial (prepared as described in Example 1) of B. subtilis culture containing the B. amyloliquefaciens neutral metalloprotease was used to inoculate 600 ml of SBGl % medium containing 200 mg/L chloramphenicol. The cultures were grown for 48 hours at 37°C, after which time, the culture fluid was recovered by centrifugation at 12,000 rpm, as known in the
19 art. This procedure was done in duplicate. The final enzyme concentrations obtained were in the range of about 1.4 and 2 g/L.
EXAMPLE 3 Purification and Characterization of Neutral Metalloprotease
This Example describes the methods used to purify the neutral metalloprotease expressed by the organisms described in Example 2. After 36 hours of incubation at 37 0C, the fermentation broth was recovered and centrifuged at 12000 rpm (SORV ALL® centrifuge model RC5B). The secreted neutral metalloproteases were isolated from the culture fluid and concentrated approximately 10-fold using an Amicon filter system 8400 with a BES (polyethersulfone) 1OkDa cutoff.
The concentrated supernatant was dialyzed overnight at 4 0C against 25 mM MES buffer, pH 5.4, containing 10 mM NaCl. The dialysate was then loaded onto a cation- exchange column Porous HS20 (total volume ~ 83 mL; binding capacity ~ 4.5g protein/mL column; Waters) as described below. The column was pre-equilibrated with 25 mM MES buffer, pH 5.4, containing 10 mM NaCl. Then, approximately 200-300 mL of sample was loaded onto the column. The bound protein was eluted using a pH gradient from 5.4 to 6.2 ■ over 10-column volumes of MES buffer. Elution of the protein was between pH 5.82 and . 6.0, and was assessed using proteolytic activity as described herein and 10 % (w/v) NUPAGE® SDS-PAGE (Novex). The neutral protease containing fractions were then pooled. Calcium and zinc chloride salts in the ratio of 3:1 were added prior to the adjustment of the pH to 5.8. The Perceptive Biosystems BIOCAD® Vision (GMI) was used for protein purification.
The purified protein, assessed using a 10 % (w/v) NUPAGE® SDS-PAGE, was determined to homogenous, with greater than 95 % purity. Typically, less than 1% of the purified preparations showed serine protease activity when assessed using the standard protease assay with the small substrate, suc-p-AAPF-pNA (N-succinyl-L-Ala-L-Ala-L-Pro-L- Phe-p-nitroanilide) (Sigma) . This assay was performed in microtiter plate format (96 well) using a 100 mM Tris-HCl buffer, pH 8.5, containing 10 mM CaCl2 and 0.005 % TWEEN®- 80. The substrate (p-AAPF NA) was prepared by making a 160 mM stock in DMSO
(dimethylsulfoxide) (100 mg/ml) and diluting this stock 100-fold with the Tris-HCl buffer containing CaCl2 and 0.005 % TWEEN®-80. Then, 10 uL of diluted protease solution (dilutions were prepared using 100 mM Tris-HCl buffer, pH 8.5, containing 10 mM CaCl2 and 0.005 % TWEEN-80) was added to 190 uL lmg/ml p-AAPF solution. The assay was mixed for 5 minutes and the kinetic change at 410 nm was read over 2 to 5 minutes. The slope of the response was measured and used as an indication of the amount of serine protease, activity. The protein was formulated for storage using 25 mM MES buffer, pH 5.8, containing 1 mM zinc chloride, 4 mM calcium chloride, and 40 % propylene glycol.
EXAMPLE 4 Affinity of Purified MULTIFECT® Neutral Metalloprotease (PMN) for Calcium and Zinc Cations
Li this Example, methods to determine the affinity of the neutral metalloprotease (PMN) prepared as described in the above Examples are described. The affinities of PMN for calcium and zinc ions were performed using the fluorescent indicators Fluo-3 and FluoZin-3, respectively obtained from Molecular Probes. All fluorescence measurements were recorded on a LS50B Luminescence spectrophotometer (Perkin-Elmer). The binding of Fluo-3 was monitored by excitation at 500 nm and the emission spectra were recorded from 505 to 550 nm. Similarly, the binding of FluoZin-3 was monitored by excitation at 495 nm and the emission spectra were collected from 500 to 550 nm. The excitation and emission slit width were both set at 2.5 nm.
In these determinations, 100 uM neutral metalloprotease in 50 mM Tris-HCl buffer, pH 8.4, was titrated with increasing amounts of the relevant indicator. The titration curves are shown in Figure 1. In this Figure, the triangles represent the curve binding data obtained for Zn2+, using the Fluo-Zin3 dye monitored at 516 nm, while the circles represent the data obtained for Ca2+ using the Fluo-3 dye monitored at 522 nm. The association constants
(Ka' s) for zinc and calcium (assuming a single binding site) were determined to be 0.401 nM and 0.037 nM, respectively. These results indicate that purified MULTIFECT® neutral metalloprotease bound the zinc ion with approximately 10-fold greater affinity than the calcium ion. Based on the weaker binding of calcium, initial protein engineering experiments are designed to involve either (i) designing tighter calcium binding site(s) and/or (ii) eliminating the structural stability requirement for calcium {e.g., to stabilize the protein to greater than 80 %). EXAMPLE 5 Storage Stability In this Example, experiments conducted to assess the storage stability of PMN and recombinant B. amyloliquefaciens neutral metalloprotease expressed in B. suhtilis are described. Proteolysis of these neutral metalloprotease preparations was assessed in the presence of increasing LAS (lauryl sodium sulfate; Sigma) solutions (0 % up to an including 10 %). Proteolytic fragments generated from the purified MULTIFECT® neutral metalloprotease (PMN) were observed using 10 % (w/v) NUPAGE® SDS-PAGE.
The storage stability of the recombinant neutral metalloprotease from B. amyloliquefaciens expressed in B. subtilis produced as described above, was determined in buffer alone (50 mM Tris-HCl buffer, pH 8.4) and in the presence of detergent base obtained from Procter & Gamble. The buffer and/or detergent base contained zinc ions, calcium ions or a combination thereof. The concentration of both the zinc and calcium ions was varied from 0 to 25 mM. These results were always compared with those for the neutral metalloprotease incubated in buffer alone.
Protease Assays
Azo-casein Assay:
The azo-casein endpoint assay was used to assess the amount of proteolysis that occurred under certain conditions. In these assays, 75 uL of enzyme were incubated with excess calcium or zinc or both ions added to 250 μl of 1 % (w/v) azo-casein (Sigma). The reaction proceeded at 30 0C for 15 minutes, after which 10 % (w/v) trichloroacetic acid was added to stop the reaction. The precipitated protein and the unreacted azo-casein were removed by centrifugation for 10 minutes at 14 000 ipm. The color of the azo-group was developed by addition of 750 μL 1 M sodium hydroxide. The development of the color proceeded for 5 minutes, after which the reaction was stopped and the absorbance was measured at 440 nm.
Succinylated-casein and TNBSA assay: The activity of the neutral metalloprotease was determined using the QuantiCleave Protease Assay Kit™ (Pierce). This assay is based on the digestion of succinylated-casein by the enzyme. The primary amino groups formed are then reacted with trinitrobenzene sulfonic acid (TNBSA) and form a colored complex that has maximum absorbance at 450 nm. The assay is performed in 96-well microtiter format. The assay requires a 15-minute incubation with the succinylated casein and a 15-minute reaction with the TNBSA. During both incubations, the samples are placed on a shaker. TPCK-trypsin (Pierce) is the general standard used for overall protease activity determinations. However, optimum conditions for activity for specific proteases require the use of the protease of interest. In the case of the assays performed in these experiments, both trypsin and the protease of interest were used, in order to calibrate the assay. The accuracy of the assay requires that the standard dilutions made of 0.5 mg/mL trypsin always result in absorbance values (at 450 nm) below 0.5.
Every sample was measured relative to a control containing no casein. The reported change in absorbance (ΔAbs(450 nm)) accounts for the interference from the amino groups of casein. Further, any possible interference from primary amino groups in the buffer and/or other components of the detergent was/were also corrected for in this manner. The activity of all samples was determined relative to detergent with no added neutral metalloprotease, as well as for enzyme incubated in BupH™ borate buffer supplied with the kit, for the same length of time and at the same temperature. This test is an end-point assay, in which 50 mM borate buffer, pH 8.5, was used at 32
0C. The protease assays were typically performed in duplicate. In most experiments to determine stability measurements, the protein and detergent were diluted using the above- mentioned buffer by 1:1000, although in some experiments dilutions of were also 1:500 or 1: 200, in order to obtain readings where the absorbance of the blanks was less than 0.5. The microtiter spectrophotometer used in these experiments was a SpectraMax250® (Molecular Devices) and all assays were conducted in medium protein-binding 96-well plates (Corning).
The results for the standards protein samples (e.g., trypsin and purified metalloprotease) obtained in these assays indicated that there was a non-linear response (a linear scale may be adequate only in a narrow assay range). Hence, the curve was fitted to a quadratic function where f = yo+ax2 +bx; f is fit to y (SigmaPlot® v. 9; SPSS, Inc.). Thus, if a linear equation was used to quantitate the amount of protein, inaccurate data were obtained; the quadratic equation was found to be required in order to obtain accurate results. It is noted that the manufacturer's (Pierce) kit insert indicates that the results may be fitted with "x" being a log scale.
EXAMPLE 6
Effect of pH and LAS on Neutral Metalloprotease Activity
The pH optimum of the activity for 0,36 mg/mL of formulated nprE was also determined. The buffers investigated in this study were 50 mM sodium acetate over the pH range 3.5-5.5 (pKa = 4.76), 50 mM MES buffer over the pH range 5.5 to 7.0 (pKa = 6.10), and 50 mM Tris-HCl buffer at pH 8.4. The pH optimum for formulated nprE was determined to be between 5.5 and 6.0.
The effect of the detergent component LAS on the activity of 0.36 mg/ml of formulated nprE was investigated by incubation with 0 to 1 % (w/v) LAS. The results are shown in the graph provided at Figure 2. As these results indicate, the protease is significantly inactivated by the detergent component, thereby necessitating a means to stabilize the protease against this deleterious effect.
In some experiments, the high density liquid detergent (HDL) composition designated as "TIDE® 2005," provided by Procter & Gamble was used. As supplied, this detergent contained all necessary components, except for the neutral metalloprotease of the present invention.
Storage Stability in Liquid Detergent Base as a Function of Time
The stability test was performed in a mini-storage manner. The conditions to be varied and the various concentrations of calcium and zinc chloride salts to be added were assessed using a matrix designed using the FusionPro™ (S-Matrix) software. The following table summarizes the conditions tested to ascertain the long-term storage stability of neutral metalloprotease from B. amyloliquefaciens.
Figure imgf000087_0001
The final volume of each tested condition was 1 mL. TIDE® 2005 was dosed with 0:36 mg enzyme/mL. Formulated culture fluid and purified recombinant metalloprotease were incubated in the TIDE® 2005 base at 32 0C over a period of approximately 4 weeks. The storage stability of the metalloprotease in detergent was compared to the stability of the neutral metalloprotease in 50 mM MES buffer, pH 5.8.
Prior to testing, the samples were diluted 5 in 1000 using assay buffer (50 mM borate buffer, pH 8.5). The residual activity was determined and compared relative to the neutral metalloprotease in assay buffer. All measurements were determined in duplicate. Each sample was tested in parallel with appropriate control blanks (i.e., the detergent, buffer and any necessary additives being tested). The samples were then assayed as described in the instructions provided with the QuantiCleave™ Protease Assay Kit (Pierce).
The results of these stability tests conducted over a 3-4 week period are shown in Figure 22. In TIDE® 2005, the neutral metalloprotease in the absence of ions (Le., no added salt) rapidly lost all of its proteolytic/hydrolytic activity against casein. Indeed it was determined that less than 20% of the activity remained after less than 1 hour of incubation. In contrast, incubation of nprE in TIDE® 2005 containing zinc ions (up to and including 15 mM) stabilized the protease and prevented proteolysis over a 7-day period. Thus, the presence of zinc ions in this formulation functioned well in maintaining at least 60 % of the protease activity. Likewise, a concentration of 7.5 mM zinc ions resulted in a similar stabilization effect. This concentration of zinc ions is exceeding low and is contemplated to find use in a variety of detergent formulations. In these experiments, no added effect was provided by the inclusion of calcium ions. Furthermore, the addition of calcium ions in excess of 15 mM, and up to and including 25 mM, induced precipitation when added to TIDE® 2005 base. Although it is not intended that the present invention be limited to any particular mechanism, it was contemplated that the absence of an effect of added calcium ions on protease stabilization in these experiments was the result of the detergent composition.
For thermolysin, which displays 55 % amino acid sequence identity with neutral metalloprotease from B. amyloliquefaciens (sequence alignment performed using CLUSTAL W, v. 1.82), it has been clearly shown that zinc ions are essential for activity, whereas the calcium ions and engineering of the calcium binding sites have been shown to play a stabilization role (See e.g., Mansfield., et al., J. Biol. Chem., 272:11152-11156 [1997]; and Van den Berg et al., Biotechnol. Appl. Biochem., 30:35-40 [1999]).
In alternative embodiments, other cations (e.g., Co2+, Mn2+ and Fe2+) find use in the present invention for the stabilization of neutral metalloprotease from B. amyloliquefaciens. This is in contrast to prior data that has indicated that none of these ions resulted in 100 % restoration of specific activity (Holmquist. and Vallee, J. Biol. Chem., 249:4601-4607 [1974]). It is contemplated that these ions will affect stability by preventing the unfolding and subsequent proteolytic degradation of the metalloprotease. However, it is not intended that the present invention be limited to any particular mechanism of action.
EXAMPLE 7
NprE Protease Production in B. subtilis using the nprE Expression Vector pUBnprE In this Example, experiments conducted to produce NprE protease in B. subtilis, in particular, the methods used in the transformation of plasmid pUBnprE into B. subtilis are described. Transformation was performed as known in the art (See e.g., WO 02/14490, incorporated herein by reference). The DNA sequence (nprE leader, nprE pro and nprE mature DNA sequence from B. amyloliquefaciens) provided below, encodes the NprE precursor protein:
GTGGGTTTAGGTAAGAAATTGTCTGTTGCTGTCGCCGCTTCCTTTATGAGTTTAAC CATCAGTCTGCCGGGTGTTCAGGCCGCTGAGAATCCTCAGCTTAAAGAAAACCTG ACGAATTTTGTACCGAAGCATTCTTTGGTGCAATCAGAATTGCCTTCTGTCAGTG ACAAAGCTATCAAGCAATACTTGAAACAAAACGGCAAAGTCTTTAAAGGCAATC CTTCTGAAAGATTGAAGCTGATTGACCAAACGACCGATGATCTCGGCTACAAGCA CTTCCGTTATGTGCCTGTCGTAAACGGTGTGCCTGTGAAAGACTCTCAAGTCATT ATTCACGTCGATAAATCCAACAACGTCTATGCGATTAACGGTGAATTAAACAACG ATGTTTCCGCCAAAACGGCAAACAGCAAAAAATTATCTGCAAATCAGGCGCTGG ATCATGCTTATAAAGCGATCGGCAAATCACCTGAAGCCGTTTCTAACGGAACCGT TGCAAACAAAAACAAAGCCGAGCTGAAAGCAGCAGCCACAAAAGACGGCAAAT ACCGCCTCGCCTATGATGTAACCATCCGCTACATCGAACCGGAACCTGCAAACTG GGAAGTAACCGTTGATGCGGAAACAGGAAAAATCCTGAAAAAGCAAAACAAAGT GGAGCATGCCGCCACAACCGGAACAGGTACGACTCTTAAAGGAAAAACGGTC TCATTAAATATTTCTTCTGAAAGCGGCAAATATGTGCTGCGCGATCTTTCTAA ACCTACCGGAACACAAATTATTACGTACGATCTGCAAAACCGCGAGTATAAC CTGCCGGGCACACTCGTATCCAGCACCACAAACCAGTTTACAACTTCTTCTC AGCGCGCTGCCGTTGATGCGCATTACAACCTCGGCAAAGTGTATGATTATTT CTATCAGAAGTTTAATCGCAACAGCTACGACAATAAAGGCGGCAAGATCGTA TCCTCCGTTCATTACGGCAGCAGATACAATAACGCAGCCTGGATCGGCGACC AAATGATTTACGGTGACGGCGACGGTTCATTCTTCTCACCTCTTTCCGGTTC AATGGACGTAACCGCTCATGAAATGACACATGGCGTTACACAGGAAACAGCC AACCTGAACTACGAAAATCAGCCGGGCGCTTTAAACGAATCCTTCTCTGATG TATTCGGGTACTTCAACGATACTGAGGACTGGGATATCGGTGAAGATATTAC GGTCAGCCAGCCGGCTCTCCGCAGCTTATCCAATCCGACAAAATACGGACAG CCTGATAATTTCAAAAATTACAAAAACCTTCCGAACACTGATGCCGGCGACT ACGGCGGCGTGCATACAAACAGCGGAATCCCGAACAAAGCCGCTTACAATAC GATTACAAAAATCGGCGTGAACAAAGCGGAGCAGATTTACTATCGTGCTCTG ACGGTATACCTCACTCCGTCATCAACTTTTAAAGATGCAAAAGCCGCTTTGA TTCAATCTGCGCGGGACCTTTACGGCTCTCAAGATGCTGCAAGCGTAGAAGC TGCCTGGAATGCAGTCGGATTGTAA (SEQ ID NO: 12)
In the above sequence, bold indicates the DNA that encodes the mature NprE protease, standard font indicates the leader sequence (nprE leader), and underlined indicates the pro sequences (nprE pro). The amino acid sequence (NprE leader, NprE pro and NprE mature DNA sequence) (SEQ ID NO: 13) provided below, encodes the NprE precursor protein. In this sequence, underlined indicates the pro sequence and bold indicates the mature NprE protease. SEQ ID NO: 17 provides the NprE pro-sequence separately from the mature NprE sequence and SEQ ID NO: 18 provides the mature NprE sequence. This sequence was used as the basis for making the variant libraries described herein.
MGLGKKLSVAVAASFMSLTISLPGVOAAENPOLKENLTNFVPKHSLVOSELPSVSDK AIKOYLKONGKVFKGNPSERLKLIDQTTDDLGYKHFRYVPVVNGVPVKDSOVΠHVD KSNNVYAINGELNNDVSAKTANSKKLSANOALDHAYKAIGKSPEAVSNGTVANKNK AELKAAATKDGKYRLAYDVTIRYIEPEPANWEVTVDAETGKILKKONKVEHAATTG TGTTLKGKTVSLNISSESGKYVLRDLSKPTGTQIITYDLQNREYNLPGTLVSSTTN QFTTSSQRAAVDAHYNLGKVYDYFYQKFNRNSYDNKGGKIVSSVHYGSRYNNA AWIGDQMIYGDGDGSFFSPLSGSMDVTAHEMTHGVTQETANLNYENQPGALNE SFSDVFGYFNDTEDWDIGEDITVSQPALRSLSNPTKYGQPDNFKNYKNLPNTDAG DYGGVHTNSGIPNKAAYNTITKIGVNKAEQIYYRALTVYLTPSSTFKDAKAALIQ SARDLYGSQDAASVEAAWNAVGL (SEQ ID NO:13)
AENPQLKENLTNFVPKHSLVQSELPSVSDKAIKQYLKQNGKVFKGNPSERLKLIDQTT DDLGYKHFRYVPVVNGVPVKDSQVΠHVDKSNNVYAINGELNNDVSAKTANSKKLS ANQALDHAYKAIGKSPEAVSNGTVANKNKAELKAAATKDGKYRLAYDVTIRYIEPE PANWEVTVDAETGKILKKQNKVEH (SEQ ID NO: 17)
AATTGTGTTLKGKTVSLNISSESGKYVLRDLSKPTGTQΠTYDLQNREYNLPGTLVSST TNQFTTSSQRAAVDAHYNLGKVYD YFYQKFNRNSYDNKGGKIVSSVHYGSRYNNA AWIGDQMΓYGDGDGSFFSPLSGSMDVTAHEMTHGVTQETANLNYENQPGALNESFS DVFGYFNDTEDWDIGEDΓΓVSQPALRSLSNPTKYGQPDNFKNYKNLPNTDAGDYGG VHTNSGPNKAA YNTΓΓKIGVNKAEQIYYRALTVYLTPSSTFKDAKAALIQSARDLYG
SQDAASVEAAWNAVGL (SEQ ID NO: 18)
The pUBnprE expression vector was constructed by amplifying the nprE gene from the chromosomal DNA of B. amyloliquefaciens by PCR using two specific primers:
Oligo AB 1740: CTGCAGGAATTCAGATCTTAACATTTTTCCCCTATCATTTTTCCCG (SEQ ID NO: 19) Oligo AB1741:
GGATCCAAGCTTCCCGGGAAAAGACATATATGATCATGGTGAAGCC (SEQ ID NO:20)
PCR was performed on a thermocycler with Phusion High Fidelity DNA polymerase
(Finnzymes. The PCR mixture contained 10 μl 5x buffer (Finnzymes Phusion), lμl 1OmM dNTP's, 1.5μl DMSO, lμl of each primer, lμl Finnzymes Phusion DNA polymerase, lμl chromosomal DNA solution 50ng/μl, 34.5 μl MiIIiQ water. The following protocol was used:
PCR protocol:
1) 3O sec 98°C;
2) 10 sec 98°C;
3) 20 sec 55°C; 4) 1 min 72°C;
5) 25 cycles of steps 2 to 4; and
6) 5 min 72°C.
This resulted in a 1.9 kb DNA fragment which was digested using BgIR and Bell DNA restriction enzymes. The multicopy Bacillus vector pUBl 10 (See e.g., Gryczan, J. Bacterid., 134:318-329 [1978]) was digested with BamHL. The PCR fragment x BgIJl x Bell was then ligated in the pUBHO x BamΗI vector to form pUBnprE expression vector (See, Figure 14). pUBnprE was transformed to a B. subtilis (ΔaprE, ΔnprE, oppA, AspoIIE, degUHy32, AamyE::(xylR,pxylA-comK) strain. Transformation into .B. subtilis was performed as described in WO 02/14490, incorporated herein by reference. Selective growth of B. subtilis transformants harboring the pUBnprE vector was performed in shake flasks containing 25 ml MBD medium (a MOPS based defined medium), with 20 mg/L neomycin. MBD medium was made essentially as known in the art (See, Neidhardt et ah, J. Bacteriol., 119: 736-7 '47 [1974]), except that NH4Cl2, FeSO4, and CaCl2 were left out of the base medium, 3 mM K2HPO4 was used, and the base medium was supplemented with 60 mM urea, 75 g/L glucose, and 1 % soytone. Also, the micronutrients were made up as a 100 X stock containing in one liter, 400 mg FeSO4 .7H20, 100 mg MnSO4 .H20, 100 mg ZnSO4.7H2O, 50 mg CuCl2.2H20, 100 mg CoCl2.6H20, 100 mg NaMo04.2H20, 100 mg Na2B4O7JOH2O, 10 ml of IM CaCl2, and 10 ml of 0.5 M sodium citrate. The culture was incubated for three days at 37°C in an incubator/shaker (Infors). This culture resulted in the production of secreted NprE protease with proteolytic activity as demonstrated by protease assays. Gel analysis was performed using NuPage Novex 10% Bis-Tris gels (Invitrogen, Cat.No.
NP0301BOX). To prepare samples for analysis, 2 volumes of supernatant were mixed with 1 volume IM HCl, 1 volume 4xLDS sample buffer (Invitrogen, Cat.No. NP0007), and 1% PMSF (20 mg/ml) and subsequently heated for 10 minutes at 700C. Then, 25 μL of each sample were loaded onto the gel, together with 10 μL of SeeBlue plus 2 pre-stained protein standards (Invitrogen, Cat.No.LC5925). The results clearly demonstrated that the nprE cloning strategy described in this example yield active NprE produced by B. subtilis.
EXAMPLE 8 Generation of nprE Site Evaluation Libraries (SELs)
In this Example, methods used in the construction of nprE SELs are described. The pUBnprE vector, containing the nprE expression cassette described above, served as template DNA. This vector contains a unique BgM restriction site, which was utilized in the site evaluation library construction. The pUBnprE expression vector, primers, synthesized at Invitrogen (desalted, 50 nmol scale) were used to generate the libraries. The sequences of the primers are provided in Table 8-1.
To construct a nprE site evaluation library, three PCR reactions were performed, including two mutagenesis PCRs to introduce the mutated codon of interest in the mature nprE DNA sequence and a third PCR used to fuse the two mutagenesis PCRs in order to construct the pUBnprE expression vector including the desired mutated codon in the mature nprE sequence.
The method of mutagenesis was based on the codon-specific mutation approach, in which the creation of all possible mutations at a time in a specific DNA triplet was performed using a forward and reverse oligonucleotide primer with a length of 25 to 45 nucleotides enclosing a specific designed triple DNA sequence NNS ((A,C,T or G), (A,C,T or G), (C or G)) that corresponded with the sequence of the codon to be mutated and guaranteed random incorporation of nucleotides at that specific nprE mature codon. The number listed in the primer names (See, Table 8-1) corresponds with the specific nprE mature codon position.
Two additional primers used to construct the site evaluation libraries contained the BgIJl restriction site together with a part of the pUBnprE DNA sequence flanking the BgIJI restriction site. These primers were produced by Invitrogen (50nmole scale, desalted) and are listed in Table 8-1.
Figure imgf000093_0001
Figure imgf000094_0001
Figure imgf000095_0001
Figure imgf000096_0001
Construction of each site evaluation library started with two primary PCR amplifications using the pUB-Bglll-FW primer and a specific nprE reverse mutagenesis primer. For the second PCR, the pUB-Bgiπ -RV primer and a specific nprE forward mutagenesis primer (equal nprE mature codon positions for the forward and reverse mutagenesis primers) were used.
The introduction of the mutations in the mature nprE sequence was performed using Phusion High-Fidelity DNA Polymerase (Finnzymes; Cat. no. F-530L). All PCRs were performed according to the Finnzymes protocol supplied with the polymerase. The PCR conditions for the primary PCRs were:
For primary PCR 1: pUB-Bglll-FW primer and a specific NPRE reverse mutagenesis primer - both 1 μL (10 μM) ;
For primary PCR 2: pUB-Bglll -RV primer and a specific NPRE forward mutagenesis primer - both 1 μL (10 μM) ; together with
5 x Phusion HF buffer 10 μL 10 mM dNTP mixture 1 μL Phusion DNA polymerase 0.75 μL (2 units/ μL) DMSO, 100% l μL pUBnprE template DNA l μL (0.1 - l ng/ μL) Distilled, autoclaved water up to 50 μL The PCR program was: 30 seconds 98°C, 30x (10 seconds 98°C, 20 seconds 550C, 1,5 minute 72°C) and 5 min ITQ.., performed in a PTC-200 Peltier thermal cycle (MJ Research). The PCR experiments result in two fragments of approximately 2 to 3 kB, which had about 30 nucleotide base overlap around the NPRE mature codon of interest. Fragments were fused in a third PCR reaction using these two aforementioned fragments and the forward and reverse BgIYL primers. The fusion PCR reaction was carried out in the following solution:
pUB-Bgiπ-FW primer and pUB-Bglϋ-RV primer - both 1 μL (10 μM)
5 x Phusion HF buffer 10 μL
10 mM dNTP mixture 1 μL
Phusion DNA polymerase 0.75 μL (2 units/ μL)
DMSO, 100% 1 μL primary PCR 1 reaction mix 1 μL primary PCR 2 reaction mix 1 μL
Distilled, autoclaved water up to 50 μL
The PCR fusion program was as follows: 30 seconds 98°C, 30x (10 seconds 98°C,
20 seconds 55°C, 2:40 minute 72°C) and 5 min 72°C, in a PTC-200 Peltier thermal cycler (MJ Research).
The amplified linear 6.5 Kb fragment was purified using the QiaquickPCR purification kit (Qiagen, Cat. no. 28106) and digested with BgM restriction enzyme to create cohesive ends on both sides of the fusion fragment:
- 35 μL purified linear DNA fragment - 4 μL REACT ® 3 buffer (Invitrogen) - 1 μL BgM, 10 units/ml (Invitrogen) Reaction conditions: 1 hour, 300C.
Ligation of the BgM digested and purified using Qiaquick PCR purification kit
(Qiagen, Cat. no. 28106) fragment results in circular and multimeric DNA containing the desired mutation: - 30 μL of purified BgM digested DNA fragment
- 8 μL T4 DNA Ligase buffer (Invitrogen® Cat. no. 46300-018)
- 1 μL T4 DNA Ligase, 1 unit/μL (Invitrogen® Cat. no. 15224-017)
Reaction conditions: 16-20 hours, 16°
Subsequently, the ligation mixture was transformed to a B. subtilis (AaprE, AnprE, oppA, ΔspoIIE, degUHy32, AamyE::(xylR,pxylA-comK) strain. Transformation to B. subtilis was performed as described in WO 02/14490, incorporated herein by reference. For each library, 96 single colonies were picked and grown in MOPS media with neomycin and 1.25 g/L yeast extract for sequence analysis (BaseClear) and screening purposes. Each library included a maximum of 19 nprE site-specific variants.
The variants were produced by growing the B. subtilis SEL transformants in 96 well MTP at 370C for 68 hours in MBD medium with 20 mg/L neomycin and 1.25 g/L yeast extract {See, above).
EXAMPLE 9 Generation of nprE Combinatorial Libraries (RCLs) In this Example, methods used to generate nprE combinatorial libraries are described.
For this enzyme, one property was chosen as the property that needed to be changed the most. This property is defined herein as the "primary property." All other properties were "secondary properties" for the purpose of combinatorial library design. The basic strategy for improving a protein as used herein, was to combine mutations that improve the primary property and also maintain or improve the secondary properties. The site evaluation data were used to identify those mutations which improved the primary property while maintaining or improving the secondary properties. Mutations that were to be combined were identified by their Performance Index (PI or Pi) and associated ΔΔGapp values. The "Apparent Free Energy Change" (ΔΔGapp) as used herein is defined as:
ΔΔGapp = -RT Ln ( Pvarian/Pparent ) where Pvaπant is the performance value for the variant and Pparent is the performance value for the parent enzyme under the same conditions. The ratio PVari_ntΛPp_rent is defined as the performance index (Pi) for the property. The ΔΔGapp values were expected to behave in a similar fashion to actual ΔΔG values for data distributions and additivity. However, since ΔΔG represents the maximum amount of work that can be carried out by the variant compared to the parent enzyme, the quantity ΔΔGapp generally underestimates the ΔΔG and may lead to results that appear synergistic in that the properties of two additive positions may be greater than the value predicted by adding their ΔΔGapp values together.
For example, when TIDE® stability is the primary property and BMI activity is the secondary property, mutations that have ΔΔGapp values < 0 (Pi >1) and BMI ΔΔGapp values < 0.06 (Pi >0.9) may be chosen for combination. Indeed, these relationships were explored in these experiments.
To produce the variants used in these experiments, synthetic nprE library fragments, containing multiple mutations at multiple nprE mature DNA positions, were produced by GeneArt (Geneart). These 1.5 kB nprE library fragments were digested with DNA restriction enzymes Pvul and Aval, purified and ligated in the 5 kB pUB vector fragment (also digested with DNA restriction enzymes Pvul and Aval) by a ligase reaction using T4 DNA Ligase (Invitrogen® Cat. no. 15224-017).
To transform the ligation reaction mix directly into Bacillus cells, the library DNA (nprE library fragment mix ligated in pUB vector fragment) was amplified using the
TempliPhi kit (Amersham cat. #25-6400). For this purpose, IuL of the ligation reaction mix was mixed with 5μL of sample buffer from the TempliPhi kit and heated for 3 minutes at 95 °C to denature the DNA. The reaction was placed on ice to cool for 2 minutes and then spun down briefly. Next, 5μL of reaction buffer and 0.2μL of phi29 polymerase from the TempliPhi kit were added, and the reactions were incubated at 30°C in an MJ Research PCR machine for 4 hours. The ρhi29 enzyme was heat inactivated in the reactions by incubation at 65°C for 10 min in the PCR machine.
For transformation of the libraries into Bacillus, 0.1 uL of the TempliPhi amplification reaction product was mixed with 500 μL of competent B. subtilis cells (ΔaprE, ΔnprE, oppA, ΔspoIIE, degUHy32, ΔamyE::(xylR,pxylA-comK) followed by vigorous shaking at 37°C for 1 hour. Then, 100 and 500 μL were plated on HI-agar plates containing 20 mg/L neomycin and 0.5% skim milk. In general, transformation to B. subtilis was performed as described in WO 02/14490, incorporated herein by reference. B. subtilis nprE combinatorial libraries, constructed by this method are contemplated to contain wild type amino acids at one or more of the positions targeted for mutagenesis.
The variants obtained in these libraries were then tested for their stability in TIDE® and their performance in BMI wash performance tests as described herein. Table 9 provides performance indices for the variants tested in the BMI assay. In this Table, "Pos." indicates the position in the NprE amino acid sequence that was changed, and "AA" indicates the amino acid substitution made for each variant.
Figure imgf000101_0001
Figure imgf000102_0001
Figure imgf000103_0001
EXAMPLE 10
Alternative Method Generate nprE Site Evaluation Libraries (SELs) via QuikChange® Mutagenesis
In this Example, alternative methods to generate nprE SELs are described. As in Example 8, above, the pUBnprE vector served as the template DNA source for the generation of nprE SELs. The major difference between the two methods is that this method requires amplification of the entire vector using complementary site-directed mutagenic primers.
Materials:
Bacillus strain containing the pUBnprE vector
Qiagen Plasmid Midi Kit (Qiagen cat # 12143) Ready-Ly se Ly sozyme (Epicentre cat # Rl 802M) dam Methylase Kit (New England Biolabs cat # M0222L)
Zymoclean Gel DNA Recovery Kit (Zymo Research cat # D4001) nprE site-directed mutagenic primers, lOOnmole scale, 5' Phosphorylated, PAGE purified
(Integrated DNA Technologies, Inc.) QuikChange Multi Site-Directed Mutagenesis Kit (Stratagene cat # 200514)
MJ Research PTC-200 Peltier Thermal Cycler (Bio-Rad Laboratories)
1.2% agarose E-gels (Invitrogen cat # G5O18-O1) TempliPhi Amplification Kit (GE Healthcare cat # 25-6400-10)
Competent B. subtilis cells (AaprE, AnprE, oppA, AspoIIE, degUHy32, AamyE::(xylR,pxylA- comK)
Methods:
To obtain the pUBnprE vector, a single colony of a Bacillus strain containing the pUBnprE vector was used to inoculate a 5ml LB + lOppm neomycin tube. This was the starter culture used in these methods. The culture was grown at 37°C, with shaking at 225 rpm for 6 hours. Then, 100 ml of fresh LB + lOppm neomycin were inoculated with ImI of the starter culture. This culture was grown overnight at 37°C, with shaking at 225 rpm.
Following this incubation, the cell pellet was harvested by sufficient centrifugation to provide a cell pellet. The cell pellet was resuspended in 10 ml Buffer Pl (Qiagen Plasmid Midi Kit). Then, lOul of Ready-Lyse Lysozyme was added to the resuspended cell pellet and incubated at 37°C for 30 min. Then, the Qiagen Plasmid Midi Kit protocol was continued (using 10ml of Buffer P2 and P3 to account for the increased volume of cell culture). After isolation of pUBnprE vector from Bacillus, the concentration of pUBnprE vector was quantitated. The vector was then dam methylated using the dam Methylase Kit (New England Biolabs), using the methods set forth in the kit protocols, to methylate approximately 2 ug of pUBnprE vector per tube. The Zymoclean Gel DNA recovery kit was used to purify and concentrate the dam- methylated pUBnprE vector. The dam-methylated pUBnprE vector was quantitated and then diluted to a working concentration of 50ng/ul. Complementary site-directed mutagenic primers (1 ul of each primer at lOuM) (See, Table 10-1), were used in a PCR reaction in the QuikChange Multi Site-Directed Mutagenesis Kit (Stratagene), following the manufacturer's protocol (e.g., IuI dam methylated pUBnprE vector (50ng/ul), IuI nprE site-directed Forward mutagenic primer (lOuM), IuI nprE site-directed Forward mutagenic primer (lOuM), 2.5ul
10x QuikChange Multi Reaction buffer, IuI dNTP Mix, IuI QuikChange Multi enzyme blend (2.5U/ul), and 17.5ul distilled, autoclaved water, to provide a 25ul total reaction mix). The nprE site evaluation libraries were amplified using the following conditions: 95°C, for 1 min. (1st cycle only), followed by 95°C for 1 min., 55°C for 1 min, 65°C for 13 Vz min., and repeat cycling 23 times. The reaction product was stored at 4°C overnight. Then, the reaction mixture underwent Dpnl digest treatment (supplied with QuikChange Multi Site-Directed Mutagenesis Kit) to digest parental pUBnprE vector, using the manufacturer's protocol (i.e., 1.5ul Dpnl restriction enzyme was added to each tube and incubated at 370C for 3 hours; 2ul of .Dprcl-digested PCR reaction was then analyzed on a 1.2% E-gel for each nprE SEL to ensure PCR reaction worked and that parental template was degraded). TempliPhi rolling circle amplification was then used to generate large amounts of DNA for increasing library size of each nprE SEL, using the manufacturer's protocol (i.e., IuI Dpnl treated QuikChange Multi Site-Directed Mutagenesis PCR, 5ul TempliPhi Sample Buffer, 5ul TempliPhi Reaction Buffer, and 0.2ul TempliPhi Enzume Mix, for an ~1 IuI total reaction; incubated at 300C for 3 hours; the TempliPhi reaction was diluted by adding 200ul distilled, autoclaved water and briefly vortexed. Then, 1.5ul of diluted TempliPhi material was transformed into competent B. subtilis cells, and nprE SELs were selected for using LA + lOppm Neomycin + 1.6% skim milk plates. Table 10-1 provides the names, sequences and SEQ ID NOS for the primers used in these experiments. All of the primers were synthesized by Integrated DNA Technologies, on lOOnmole scale, 5'-phosphorylated, and PAGE purified.
Table 10-1. Primers
PRIMER SEQUENCE nprE-T4F GTGGAGCATGCCGCCACANNSGGAACAGGTACGACTCTTAAAGG (SEQ ID NO:81)
CCGGAACAGGTACGACTCTTAAANNSAAAACGGTCTCATTAAATATTTCTTCTGAAAGC (SEQ ID nprE-G12F NO:82) ' nprE-Q45F CGGAACACAAATTATTACGTACGATCTGNNSAACCGCGAGTATAACCTGCC (SEQ ID NO:83) nprE-Y49F ^AACCGCGAGNNSAACCTGCCGGGCACACTCGTATCC (SEQ ID NO:84) nprE-N50F GTACGATCTGCAAAACCGCGAGTATNNSCTGCCGGGCACACTCGTATCCAG (SEQ ID NO:85) nprE-T65F CCAGCACCACAAACCAGTTTACANNSTCTTCTCAGCGCGCTGCCGTTG (SEQ ID NO:86) nprE-D119F GCAGATACAATAACGCAGCCTGGATCGGCNNSCAAATGATTTACGGTGACGGCGAC (SEQ ID NO:87) nprE-G128F CCAAATGATTTACGGTGACGGCGACNNSTCATTCTTCTCACCTCTTTCCGGTTC (SEQ ID NO:88) nprE-F130F GGTGACGGCGACGGTTCANNSTTCTCACCTCTTTCCGGTCC (SEQ ID NO:89) nprE-Q151F CATGAAATGACACATGGCGTTACANNSGAAACAGCCAACCTGAACTAC (SEQ IDNO:90) nprE-E152F CATGAAATGACACATGGCGTTACACAGNNSACAGCCAACCTGAACTACG (SEQ IDNO:91) nprE-N155F CATGGCGTTACACAGGAAACAGCCNNSCTGAACTACGAAAATCAGCCG (SEQIDNO.-92) nprE-T179F CTGATGTATTCGGGTACTTCAACGATNNSGAGGACTGGGATATCGGTG (SEQIDNO:93) nprE-Y204F GCAGCTTATCCAATCCGACAAAANNSGGACAGCCTGATAATTTCAAAAATTAC (SEQ ID NO:94)
GCAGCTTATCCAATCCGACAAAATACNNSCAGCCTGATAATTTCAAAAATTACAAAAACC (SEQ ID nprE-G205F NO:95) nprE-Y224F GAACACTGATGCCGGCGACNNSGGCGGCGTGCATACAAAC(SEQIDNO:96) nprE-T243F GAACAAAGCCGCTTACAATACGATTNNSAAAATCGGCGTGAACAAAGCG (SEQ ID NO:97) nprE-V260F GCAGATTTACTATCGTGCTCTGACGNNSTACCTCACTCCGTCATCAACTTTTAAAG (SEQ ID NO:98) nprE-Y261F GATTTACTATCGTGCTCTGACGGTANNSCTCACTCCGTCATCAACTTTTAAAG (SEQ ID NO:99) nprE-T263F GTGCTCTGACGGTATACCTCNNSCCGTCATCAACTTTTAAAGATGC (SEQ ID NO: 100) Table 10-1. Primers
PRIMER SEQUENCE nprE-A273F CCGTCATCAACTTTTAAAGATGCAAAANNSGCTTTGATTCAATCTGCGCGG (SEQ ID NOtIOl) nprE-L282F GATTCAATCTGCGCGGGACNNSTACGGCTCTCAAGATGCTGC (SEQ ID NO-.102) nprE-S285F CGCGGGACCTTTACGGCNNSCAAGATGCTGCAAGCGTAG (SEQ ID NO: 103) nprE-A289F CCTTTACGGCTCTCAAGATGCTNNSAGCGTAGAAGCTGCCTGGAATG (SEQ ID NO-.104) nprE-A293F CTCAAGATGCTGCAAGCGTAGAANNSGCCTGGAATGCAGTCGGATTG (SEQ ID NO: 105) nprE-N296F GCAAGCGTAGAAGCTGCCTGGNNSGCAGTCGGATTGTAAACAAGAAAAG (SEQID NO:106) nprE-G299F GAAGCTGCCTGGAATGCAGTCNNSTTGTAAACAAGAAAAGAGACCGGAAATCC (SEQ ID NO:107) nprE-T60F CACACTCGTATCCAGCACCNNSAACCAGTTTACAACTTCTTCTCAG (SEQ ID NO:1Q8) ' nprE-RHOF CTCCGTTCATTACGGCAGCNNSTACAATAACGCAGCCTGGATC (SEQ ID NO: 109) nprE-D139F CTCACCTCTTTCCGGTTCAATGNNSGTAACCGCTCATGAAATGACAC (SEQ ID NO: 110) nprE-T4R CCTTTAAGAGTCGTACCTGTTCCSNNTGTGGCGGCATGCTCCAC (SEQ ID NO:111)
GCTTTCAGAAGAAATATTTAATGAGACCGTTTTSNNTTTAAGAGTCGTACCTGTTCCGG (SEQ ID nprE-G12R NO: 112) nprE-Q45R GGCAGGTTATACTCGCGGTTSNNCAGATCGTACGTAATAATTTGTGTTCCG (SEQ ID NO: 113) nprE-Y49R GGATACGAGTGTGCCCGGCAGGTTSNNCTCGCGGTTTTGCAGATCGTAC (SEQ ID NO: 114) nprE-N50R CTGGATACGAGTGTGCCCGGCAGSNNATACTCGCGGTTTTGCAGATCGTAC (SEQ ID NO: 115) nprE-T65R CAACGGCAGCGCGCTGAGAAGASNNTGTAAACTGGTTTGTGGTGCTGG (SEQ ID NO-.116) nprE-D119R GTCGCCGTCACCGTAAATCATTTGSNNGCCGATCCAGGCTGCGTTATTGTATCTGC (SEQ ID NO: 117) nprE-G128R GAACCGGAAAGAGGTGAGAAGAATGASNNGTCGCCGTCACCGTAAATCATTTGG (SEQ ID NO: 118) nprE-F130R GGACCGGAAAGAGGTGAGAASNNTGAACCGTCGCCGTCACC (SEQ ID NO: 119) nprE-Q151R GTAGTTCAGGTTGGCTGTTTCSNNTGTAACGCCATGTGTCATTTCATG (SEQ ID NO: 120) nprE-E152R CGTAGTTCAGGTTGGCTGTSNNCTGTGTAACGCCATGTGTCATTTCATG (SEQ ID NO: 121) nprE-N155R CGGCTGATTTTCGTAGTTCAGSNNGGCTGTTTCCTGTGTAACGCCATG (SEQ ID NO: 122) nprE-T179R CACCGATATCCCAGTCCTCSNNATCGTTGAAGTACCCGAATACATCAG (SEQIDNO:123) nprE-Y204R GTAATTTTTGAAATTATCAGGCTGTCCSNNTTTTGTCGGATTGGATAAGCTGC (SEQ ID NO-.124)
GGTTTTTGTAATTTTTGAAATTATCAGGCTGSNNGTATTTTGTCGGATTGGATAAGCTGC (SEQ ID nρrE-G205R NO: 125) nprE-Y224R GTTTGTATGCACGCCGCCSNNGTCGCCGGCATCAGTGTTC (SEQ ID NO: 126) nprE-T243R CGCTTTGTTCACGCCGATTTTSNNAATCGTATTGTAAGCGGCTTTGTTC (SEQ ID NO: 127)
CTTTAAAAGTTGATGACGGAGTGAGGTASNNCGTCAGAGCACGATAGTAAATCTGC (SEQ ID nprE-V260R NO:128) nprE-Y261R CTTTAAAAGTTGATGACGGAGTGAGSNNTACCGTCAGAGCACGATAGTAAATC (SEQ ID NO: 129) nprE-T263R GCATCTTTAAAAGTTGATGACGGSNNGAGGTATACCGTCAGAGCAC (SEQ ID NO: 130) nprE-A273R CCGCGCAGATTGAATCAAAGCSNNTTTTGCATCTTTAAAAGTTGATGACGG (SEQ ID N0:131) nprE-L282R GCAGCATCTTGAGAGCCGTASNNGTCCCGCGCAGATTGAATC (SEQ ID NO: 132) nprE-S285R CTACGCTTGCAGCATCTTGSNNGCCGTAAAGGTCCCGCG (SEQ ID NO:133) nρrE-A289R CATTCCAGGCAGCTTCTACGCTSNNAGCATCTTGAGAGCCGTAAAGG (SEQ ID NO: 134) nprE-A293R CAATCCGACTGCATTCCAGGCSNNTTCTACGCTTGCAGCATCTTGAG (SEQ ID NO: 135) nprE-N296R CTTTTCTTGTTTACAATCCGACTGCSNNCCAGGCAGCTTCTACGCTTGC (SEQ ID NO: 136) nprE-G299R GGATTTCCGGTCTCTTTTCTTGTTTACAASNNGACTGCATTCCAGGCAGCTTC (SEQ ID NO: 137) nprE-T60R CTGAGAAGAAGTTGTAAACTGGTTSNNGGTGCTGGATACGAGTGTG (SEQ ID NO: 138) Table 10-1. Primers
PRIMER SEQUENCE nprE-Rl lOR GATCCAGGCTGCGTTATTGTASNNGCTGCCGTAATGAACGGAG (SEQ ID NO: 139) nprE-D139R iTGTCATTTCATGAGCGGTTACSNNCATTGAACCGGAAAGAGGTGAG (SEQ ID NO: 140) nprE-S135F GCGACGGTTCATTCTTCTCACCTCTTNNSGGTTCAATGGACGTAACCGCTC (SEQ ID N0:141) nprE-G136F GCGACGGTTCATTCTTCTCACCTCTTTCCNNSTCAATGGACGTAACCGCTCATG (SEQ ID NO: 142) nprE-S137F CTTCTCACCTCTTTCCGGTNNSATGGACGTAACCGCTCATG (SEQ ID NO:143) nprE-V140F ^TCTTTCCGGTTCAATGGACNNSACCGCTCATGAAATGACAC (SEQ ID NO: 144) nprE-S197F ^GCCAGCCGGCTCTCCGCNNSTTATCCAATCCGACAAAATACGGACAG (SEQ ID NO:145) nprE-L198F CAGCCAGCCGGCTCTCCGCAGCNNSTCCAATCCGACAAAATACGGACAG (SEQ ID NO:146) nprE-S199F CAGCCAGCCGGCTCTCCGCAGCTTANNSAATCCGACAAAATACGGACAGCC (SEQ ID NO: 147) nprE-L216F AGCCTGATAATTTCAAAAATTACAAAAACNNSCCGAACACTGATGCCGGCGAC (SEQ ID NO: 148) nprE-P217F CAGCCTGATAATTTCAAAAATTACAAAAACCTTNNSAACACTGATGCCGGCGAC (SEQ ID NO:149) CAGCCTGATAATTTCAAAAATTACAAAAACCTTCCGNNSACTGATGCCGGCGACTAC(SEQ ID nprE-N218F NO:150)
CAGCCTGATAATTTCAAAAATTACAAAAACCTTCCGAACNNSGATGCCGGCGACTACGG (SEQ ID nprE-T219F N0-.151)
CAGCCTGATAATTTCAAAAATTACAAAAACCTTCCGAACACTNNSGCCGGCGACTACGGCGGCG nprE-D220F (SEQ ID NO:152)
CAGCCTGATAATTTCAAAAATTACAAAAACCTTCCGAACACTGATNNSGGCGACTACGGCGGCGTG nprE-A221F (SEQ ID NO: 153) nprE-G222F ^TTCCGAACACTGATGCCNNSGACTACGGCGGCGTGCATAC (SEQ ID NO: 154) nprE-Q286F ^GGACCTTTACGGCTCTNNSGATGCTGCAAGCGTAGAAGCTG (SEQ ID NO: 155) nprE-A297F GCGTAGAAGCTGCCTGGAATNNSGTCGGATTGTAAACAAGAAAAGAGACCGG (SEQIDNO:156) nprE-S135R GAGCGGTTACGTCCATTGAACCSNNAAGAGGTGAGAAGAATGAACCGTCGC (SEQ ID NO:157) nprE-G136R CATGAGCGGTTACGTCCATTGASNNGGAAAGAGGTGAGAAGAATGAACCGTCGC (SEQ ID NO:158) nprE-S137R CATGAGCGGTTACGTCCATSNNACCGGAAAGAGGTGAGAAG (SEQ ID NO: 159) nprE-V140R GTGTCATTTCATGAGCGGTSNNGTCCATTGAACCGGAAAGAGG (SEQ ID NO:160) nprE-S197R CTGTCCGTATTTTGTCGGATTGGATAASNNGCGGAGAGCCGGCTGGCTG (SEQ ID NO: 161) nprE-L198R CTGTCCGTATTTTGTCGGATTGGASNNGCTGCGGAGAGCCGGCTGGCTG (SEQ ID NO: 162) nprE-S199R GGCTGTCCGTATTTTGTCGGATTSNNTAAGCTGCGGAGAGCCGGCTGGCTG (SEQ ID NO: 163) nprE-L216R GTCGCCGGCATCAGTGTTCGGSNNGTTTTTGTAATTTTTGAAATTATCAGGCTG (SEQ ID NO: 164) nprE-P217R GTCGCCGGC ATC AGTGTΓSNNAAGGTTTΓΓGTAATTTTTG A A ATTATCAGGCTG (SEQ ID NO: 165) GTAGTCGCCGGCATCAGTSNNCGGAAGGTTTTTGTAATTTTTGAAATTATCAGGCTG (SEQ ID nprE-N218R NO: 166)
CCGTAGTCGCCGGCATCSNNGTTCGGAAGGTTTTTGTAATTTTTGAAATTATCAGGCTG (SEQ ID nprE-T219R NO:167)
CGCCGCCGTAGTCGCCGGCSNNAGTGTTCGGAAGGTTTTTGTAATTTTTGAAATTATCAGGCTG (SEQ nprE-D220R ID NO: 168)
CACGCCGCCGTAGTCGCCSNNATCAGTGTTCGGAAGGTTTTTGTAATTTTTGAAATTATCAGGCTG nprE-A221R (SEQ ID NO: 169) nρrE-G222R GTATGCACGCCGCCGTAGTCSNNGGCATCAGTGTTCGGAAGG (SEQ ID NO:170) nρrE-Q286R CAGCTTCTACGCTTGCAGCATCSNNAGAGCCGTAAAGGTCCCG (SEQ ID N0-.171) nprE-A297R CCGGTCTCTTTTCTTGTTTACAATCCGACSNNATTCCAGGCAGCTTCTACGC (SEQ ID NO:172) EXAMPLE 11
Identification of nprE Homologues In this Example, experiments conducted to identify npr homologues are described. In particular, in this Example, experiments were conducted to clone neutral protease (npr) homologs from different and closely related Bacillus species. The different species were chosen in order to explore the diversity and properties from which these different species are isolated.
The various npr homologs explored included:
B. caldolyticus npr (P23384)
B. cereus nprC (P05806) B. cereus E33L npr (AAY60523)
B. stearothermophilus nprT
B. subtilis nprB
B. subtilis nprE
B. thuringiensis nprB (AAK00602) S. aureus &ur (Wi lli)
Figure 3 provides a sequence alignment of these homologs (SEQ ID NOS:173-181) and Figure 4 (SEQ ID NOS:182-191) provides another sequence alignment of various other homologs. In these experiments, the materials included:
Chromosomal DNA of B. subtilis strain 1168
The following DNA plasmids were synthesized at DNA2.0 with B. subtilis codon optimization: pJ4:G01905 (B. thuringiensis nprB) (See, Figure 6) pJ4:G01906 (B. cereus E33L npr) (See, Figure 7) pJ4:G01907 (B. cereus nprC) (See, Figure 8) pJ4:G01908 (B. caldolyticus npr) (See, Figure 9) pJ4:G01909 (S. aureus aur) (See, Figure 10) pJ4:G01938 (S. stearothermophilus nprT) (See, Figure 11) pJHT vector {See, Figure 12) pAC vector (See, Figure 13)
MJ Research PTC-200 Peltier Thermal Cycler (Bio-Rad Laboratories)
Primers (Operon Inc)
PfuUltra II Fusion HS DNA Polymerase (Stratagene)
Restriction endonucleases (Roche)
TOPlO chemically competent E. coli cells (Invitrogen)
B. subtilis competent cells ((AaprE, ΔnprE, oppA, AspoIIE, degUHy32, AamyE::(xylR,pxylA- comK)
Figure imgf000109_0001
Figure imgf000110_0001
A. Cloning of B. subtϊlis nprE
To construct the B. subtilis nprE plasmid, the amplified aprE promoter fragment (from pJHT vector) and B. subtilis nprE gene with terminator fragment (from B. subtilis strain 1168) were separately prepared. Figure 15 provides a schematic, illustrating the amplification of the individual DNA fragments.
PCR Splice Overlap Extension (SOE) reaction was used to join the 2 separate DNA fragments together. In this reaction, the following reagents were combined: IuI aprE promoter DNA fragment, IuI B. subtilis nprE gene + Terminator fragment, IuI Primer EL- 689 (25uM), IuI Primer EL-695 (25uM), 5ul 1Ox PfuUltra II Fusion HS DNA polymerase buffer, IuI dNTP (1OmM), IuI PfuUltra H Fusion HS DNA polymerase, and 39ul distilled, autoclaved water to provide a total reaction volume of 50 ul. The PCR cycles were: 95°C for 2 minutes (1st cycle only), followed by 28 cycles of 95°C for 30 seconds, 54°C for 30 seconds, and 72°C for 0:45 seconds.
The PCR fusion fragment of aprE promoter-B. subtilis nprE gene + Terminator was digested with Mfel and Baniiϊl restriction endonucleases. The pJHT vector was digested with £cøRI and BamΗI restriction endonucleases. The restriction endonuclease digested aprE promoter-!?, subtilis nprE gene + Terminator DNA fragment was then ligated with the restriction endonuclease digested pJHT vector. The ligation mixture was then transformed into TOPlO chemically competent E. coli cells for selection on LA + 50ppm carbenicillin. After identification of plasmids containing the correct DNA construct sequence for plasmid pEL501 (See, Figure 16), transformed into competent B. subtilis cells for integration into aprE promoter locus. Transformants were selected for protease activity (i.e. skim milk clearing) on LA + 5ppm chloramphenicol + 1.6% skim milk plates. Amplified strains were then transferred to LA + 25ppm chloramphenicol + 1.6% skim milk plates. Strains were then transferred to LA + 25ppm chloramphenicol + 1.6% skim milk plates for amplification.
B. Cloning of B. subtilis nprB To construct the B. subtilis nprB plasmid, amplified the aprE promoter fragment
(from pJHT vector), B. subtilis nprB gene fragment (from B. subtilis strain 1168), and Terminator fragment (from pJHT vector) were separately prepared. Figure 17 provides a schematic diagram of the amplification of the individual DNA fragments.
PCR Splice Overlap Extension (SOE) reaction was used to join the three separate DNA fragments together. In this reaction, the following reagents were combined: IuI aprE promoter DNA fragment, IuI B. subtilis nprB gene + Terminator fragment, IuI Terminator DNA fragment, IuI Primer EL-689 (25uM), IuI Primer EL-700 (25uM), 5ul 1Ox PfuUltra H Fusion HS DNA polymerase buffer, IuI dNTP (1OmM), IuI PfuUltra II Fusion HS DNA Polymerase, and 38ul distilled, autoclaved water, for a 50 ul total reaction volume. The PCR cycles were: 95°C for 2 minutes (1st cycle only), followed by 28 cycles of 95°C for 30 seconds, 54°C for 30 seconds, and 72°C for 0:45 seconds.
The PCR fusion fragment of aprE promoter-!?, subtilis nprB gene + Terminator was digested with Mfel and Sphϊ restriction endonucleases. The pJHT vector was digested with EcόKl and Sphϊ restriction endonucleases. The restriction endonuclease digested aprE promoter-5. subtilis nprB gene + Terminator DNA fragment was then ligated with the restriction endonuclease digested pJHT vector. The ligation mixture was then transformed into TOPlO chemically competent E. coli cells for selection on LA + 50ppm carbenicillin. After identification of plasmids containing the correct DNA construct sequence for plasmid pEL508 (See, Figure 18), transformed into competent B. subtilis cells for integration into aprE promoter locus. Transformants were selected for protease activity {i.e. skim milk clearing) on LA + 5ppm chloramphenicol + 1.6% skim milk plates. Amplified strains were then transferred to LA + 25ppm chloramphenicol + 1.6% skim milk plates. Strains were then transferred to LA + 25ppm chloramphenicol + 1.6% skim milk plates for amplification. C. Cloning of B. stearothermophilus nprT
To construct the B. stearothermophilus nprT plasmid, the amplified aprE promoter fragment (from pJHT vector) and B. stearothermophilus nprT fragment (from plasmid pJ4:G01938) were separately prepared. Figure 19 provides a schematic diagram of the amplification of the individual DNA fragments.
PCR Splice Overlap Extension (SOE) reaction was used to join the 2 separate DNA fragments together. In this reaction, the following reagents were combined: IuI aprE promoter DNA fragment, IuI B. stearothermophilus nprT gene fragment, IuI Primer EL-755 (25uM), IuI Primer EL-735 (25uM), 5ul 1Ox PfuUltra II Fusion HS DNA Polymerase buffer, IuI dNTP (1OmM), IuI PfuUltra π Fusion HS DNA Polymerase, and 39ul distilled, autoclaved water, to provide a total reaction volume of 50 ul. The PCR cycles were: 95°C for 2 minutes (1st cycle only), followed by 28 cycles of 95°C for 30 seconds, 54°C for 30 seconds, and 72°C for 0:45 seconds.
The PCR fusion fragment of aprE promoter-/?, stearothermophilus nprT gene + Terminator was digested with EcoRl and Hmdm restriction endonucleases. The pAC vector was digested with EcόRl and HinάJE restriction endonucleases. The restriction endonuclease digested aprE promoter-!?, stearothermophilus nprT DNA fragment was then ligated with the restriction endonuclease digested pAC vector. TempliPhi rolling circle amplification was then used to generate large amounts of the ligated aprE promoter-5. stearothermophilus nprT pAC DNA molecule, using the manufacturer's protocol (i.e., IuI aprE promoter-2?. stearothermophilus nprT pAC ligation reaction, 5ul TempliPhi Sample Buffer, 5ul TempliPhi Reaction Buffer, and 0.2ul TempliPhi Enzume Mix, for an ~llul total reaction; incubated at 300C for 3 hours). The TempliPhi reaction was then transformed directly into competent B. subtilis cells for integration into aprE promoter locus, thereby generating Bacillus strain EL560, confirmed by DNA sequencing analysis (See, Figure 20). Transformants were selected for protease activity (i.e. skim milk clearing) on LA + 5ppm chloramphenicol + 1.6% skim milk plates. Strains were then transferred to LA + 25ppm chloramphenicol + 1.6% skim milk plates for amplification. D. Cloning of B. caldolyticus npr
To construct the B. caldolyticus npr plasmid, the amplified aprE promoter fragment (from pJHT vector) and B. caldolyticus npr fragment (from plasmid pJ4:G01908) were separately prepared. Figure 21 provides a schematic diagram of the amplification of the individual DNA fragments.
PCR Splice Overlap Extension (SOE) reaction was used to join the 2 separate DNA fragments together. In this reaction, the following reagents were combined: IuI aprE promoter DNA fragment, IuI B. caldolyticus npr gene fragment, IuI Primer EL-755 (25uM), IuI Primer EL-741 (25uM), 5ul 1Ox PfuUltra II Fusion HS DNA Polymerase buffer, IuI dNTP (1OmM), IuI PfuUltra π Fusion HS DNA Polymerase, and 39ul distilled, autoclaved water, to provide a total reaction volume of 50 ul. The PCR cycles were: 950C for 2 minutes (1st cycle only), followed by 28 cycles of 95°C for 30 seconds, 54DC for 30 seconds, and 72°C for 0:45 seconds.
The PCR fusion fragment of aprE promoter-B. caldolyticus npr gene + Terminator was digested with EcoRΪ and H»tdHI restriction endonucleases. The pAC vector was digested with EcoRΪ and Hwdϋl restriction endonucleases. The restriction endonuclease digested aprE promoter-β. caldolyticus npr DNA fragment was then ligated with the restriction endonuclease digested pAC vector. TempliPhi rolling circle amplification was then used to generate large amounts of the ligated aprE promoter-B. caldolyticus npr pAC DNA molecule, using the manufacturer's protocol (Le., IuI aprE promoter-S. caldolyticus npr pAC ligation reaction, 5ul TempliPhi Sample Buffer, 5ul TempliPhi Reaction Buffer, and 0.2ul TempliPhi Enzume Mix, for an -llul total reaction; incubated at 300C for 3 hours). The TempliPhi reaction was then transformed directly into competent B. subtilis cells for integration into aprE promoter locus, thereby generating Bacillus strain EL561 (See, Figure 22), confirmed by DNA sequencing analysis. Transformants were selected for protease activity (i.e. skim milk clearing) on LA + 5ppm chloramphenicol + 1.6% skim milk plates. Strains were then transferred to LA + 25ppm chloramphenicol + 1.6% skim milk plates for amplification.
E. Cloning of B. thuringiensis nprB
To construct the B. thuringiensis nprB plasmid, the amplified aprE promoter fragment (from pJΗT vector) and B. thuringiensis nprB fragment (from plasmid pJ4:G01905) were separately prepared. Figure 23 provides a schematic showing the amplification of the individual DNA fragments.
PCR Splice Overlap Extension (SOE) reaction was used to join the 2 separate DNA fragments together. In this reaction, the following reagents were combined: IuI aprE promoter DNA fragment, IuI B. thuringiensis nprB gene fragment, IuI Primer EL-755
(25uM), IuI Primer EL-744 (25uM), 5ul 1Ox PfuUltra π Fusion HS DNA Polymerase buffer, IuI dNTP (1OmM), IuI PfuUltra π Fusion HS DNA Polymerase, and 39ul distilled, autoclaved water, to provide a total reaction volume of 50 ul. The PCR cycles were: 95°C for 2 minutes (1st cycle only), followed by 28 cycles of 95°C for 30 seconds, 54°C for 30 seconds, and 72°C for 0:45 seconds.
The PCR fusion fragment of aprE promoter-ZJ. thuringiensis nprB gene + Terminator was digested with EcoRI and HindJR restriction endonucleases. The pAC vector was digested with EcόRI and HindTR restriction endonucleases. The restriction endonuclease digested aprE promoter-5. thuringiensis nprB DNA fragment was then ligated with the restriction endonuclease digested pAC vector. The ligation mixture was then transformed into TOPlO chemically competent E. coli cells. After identification of plasmids containing the correct DNA construct sequence for plasmid pEL568, transformed into competent B. subtilis cells. Transformants were then selected for protease activity {i.e. skim milk clearing) on LA + 5ppm chloramphenicol + 1.6% skim milk plates. DNA plasmid preparation shows that plasmid pEL568 is stable in B. subtilis and does not integrate into the aprE promoter locus. Figure 24 provides a map of plasmid pEL568.
E. Homology Modeling
In yet additional embodiments, a homology model of the mature domain of NprE from Bacillus amyloliquefaciens is provided. In these experiments, the protein sequence of the mature domain of the NprE sequence (SEQ ID NO: 192) was run through the program BlastP (NCBI). This program matches the sequence to other known sequences of varying sequence identity. From the output, sequences for which an X-ray crystal structures are known were identified. These sequences included S. aureus Npr (pdb id IBQB) P. aeruginosa Npr (pdb idlEZM), B. thermolyticus thermolysin (pdb id IKEI) and B. cereus Npr (pdb id INPC). Figure 5 provides a sequence alignment of the various sequences analyzed. (SEQ ID NOS: 192-195) The sequence of the B. cereus Npr was found to be the most identical to NprE. B. thermolyticus thermolysin (pdb id IKEI) was excluded from subsequent steps as it is very similar to B. cereus Npr. A homology model was then prepared as detailed below, and all calculation were made using the program MOE (Chemical Computing). First, the S. aureus Npr (pdb id IBQB; SEQ BD NO: 193) P. aeruginosa Npr (pdb idlEZM)(SEQ ID NO: 194), and B. cereus Npr (pdb id INPC)(SEQ ID NO: 195) sequences were aligned using known structure, in order to obtain the most accurate sequence alignment (i.e., a structure based sequence alignment was produced). Next, the NprE mature sequence was aligned to this structure based sequence alignment. Then, an initial homology model of NprE was produced using the B. cereus Npr (pdb id INPC) structure as a template, and using the sequence alignment of NprE to B. cereus Npr produced above. It was clear from inspection of this alignment that whereas B. cereus Npr contains four Ca2+ ion binding sites, while NprE only contains two Ca2+ ion binding sites.
Finally, after the initial homology model was built, the metal ions (Le., Zn2+, and two Ca2+ ) were computationally fixed, as were their respective protein ligands. The rest of the model structure was computationally minimized using the CHARMM22 parameter set, resulting in the final homology model.
EXAMPLE 12
Wash Performance Tests
In this Example, experiments conducted to determine the wash performance of the metalloprotease of the present invention are described. All wash performance tests were performed under American wash conditions, as indicated below:
Laundry Wash Performance Tests
Equipment: Terg-O-Tometer (US Testing) 6 pot bench top model Temperature: 150C / 600F
Wash Time: 12 minutes
Agitation: 100 rpm
Rinse Time: 3 minutes
Water Hardness: 6 grains per gallon / 105 ppm as CaCO3 (3/1 Ca+2/ Mg+2) Sud concentration: 1.6 g/1 TIDE® 2005 liquid detergent base Enzyme dosage: 0.00 - 0.55 - 2.75 - 5.50 mg active protein/1 wash solution Swatches: EMPA 116 Fixed, fixated at 200C: Blood, milk, ink on cotton (10 x
7.5 cm)
EMPA 116 Unfixed: Blood, milk, ink on cotton (10 x 7.5 cm)
Equest grass: Grass Medium scrubbed on cotton (10 x 7.5 cm)
CFT C-10: Pigment, oil ,milk on cotton (10 x 7.5 cm)
EMPA 221: Unsoiled cotton used as ballast (10 x 10 cm)
6 EMPA 116 fixed + 2 EMPA 221 were put in one vessel
6 EMPA 116 unfixed + 2 EMPA 221 were put in one vessel
6 Equest grass + 2 EMPA 221 were put in one vessel
6 CFT C-10 + 2 EMPA 221 were put in one vessel
Drying conditions: Spin-drier, Grass stains were dried to the air, covered with dark clothes. The other stains were ironed. Measuring swatches: Tristimulus Minolta Meter CR-300 with equation L (L*a*b), D65
Std. Illuminate, on a white background. Expressed on Delta % Soil
Removal.
3 readings per swatch (before and after washing)
% Stain Removal = (L value after washing - L value before washing)/(L0 white cotton- L value before washing) x 100%
All experiments were done in quadruplicate
The proteases were tested in a specially developed washing test, using three different cotton swatches, soiled with:
(a) milk, blood and ink (10.0 x 7.5 cm; EMPA), designated with the numbers 116 unfixed and fixed (the stains were fixed at 2O0C);
(b) grass medium (10.0 x 7.5 cm; Equest); and (c) pigment, oil and milk (10.0 x 7.5 cm designated with the numbers C-10 CFT).
These experiments are described in greater detail below. The washing tests were performed in a bench top model Terg-O-Tometer (US Testing), equipped with six stainless steel test vessels. The stainless steel test vessels each contained 1.6 g of TIDE® 2005 liquid detergent base, dissolved in 1000 ml water of 105 ppm/6 grains per gallon, and were each loaded with six of the same soiled cotton swatches and two extra ballast cotton swatches (EMPA 221). A selected protease (e.g., neutral metalloprotease or another protease) was added to each vessel in a concentration from 0.00 to 5.50 mg active protein per liter suds. The tests were carried out for 12 minutes at 15 °C/60 0F, with an agitation of 100 rpm. After washing, the swatches were rinsed for 3 minutes under cold tap water and placed in a spin-drier. The grass swatches were air-dried and covered with dark clothing to limit the sensitivity of the grass stains to light. All other swatches were ironed. All experiments were performed in quadruplicate.
The reflectance of the tested swatches was measured with a Tristimulus Minolta Meter CR-300 using the equation L (L*a*b). Wash performance values were calculated using the following relationship:
% Stain Removal = (L value after washing - L value before washing)/(L0 white cotton- L value before washing) x 100%
The results of the Terg-OTometer (TOM) assay for purified MULTIFECT® are shown in Figure 26, and compared with those of subtilisin (BPN' Y217L), a serine alkaline protease. The TOM provided a fully operational and valid means for discriminating between the different wash performances of various proteases (e.g., serine proteases, neutral metalloprotease, and variants thereof). The TOM tests were performed on BMI and Equest medium-soiled grass surface with TIDE® 2005 as the base detergent.
As indicated in Figure 26, it was apparent that the purified neutral metalloprotease clearly performed better in the wash test than the serine protease (BPN' Y217L). In particular, 2.75 ppm of purified neutral metalloprotease was required to show a delta soil removal of ~ 10 % compared to only 0.55 ppm of the serine protease (BPN' Y217L) on the Equest grass stain. The wash performance of the neutral metalloprotease was also tested at low temperature and found to perform very well medium solid Equest stain fabric. Similar results were obtained with purified commercially available MULTIFECT® neutral protease as with the recombinant nprE produced as described above.
EXAMPLE 13 Performance of nprE Variants in BMI-TIDE® 2X Performance Assay
In this Example, experiments conducted to assess the performance of various nprE variants in the BMI assay outlined above are described. The methods provided prior to Example 1 were used (See, "Microswatch Assay for Testing Protease Performance"). The results for multiply-substituted variants with Performance Indices greater than one (PI > 1) and those with Performance Indices less than one (PI < 1) are provided in the Tables below.
In Table 13.1, data obtained for selected single-substitution variants in the BMI- TIDE® 2X performance assay are provided. The Table provides performance indices, which where calculated as described above for the variants, which show improved performance compared to the WT enzyme. Those variants, which have a performance index greater than 1, have an improved performance.
In Table 13.2, data obtained for selected multiple-substitution variants in the BMI- TIDE® 2X performance assay are provided. The Table provides performance indices, which where calculated as described above for the variants, which show improved performance compared to the WT enzyme. Those variants, which have a performance index greater than 1, have an improved performance.
Figure imgf000119_0001
Figure imgf000119_0002
Figure imgf000119_0003
Figure imgf000120_0001
Figure imgf000120_0002
Figure imgf000120_0003
Figure imgf000121_0001
Figure imgf000121_0002
Figure imgf000121_0003
Figure imgf000122_0003
Figure imgf000122_0001
Figure imgf000122_0002
Figure imgf000123_0001
Figure imgf000123_0002
Figure imgf000124_0001
Figure imgf000124_0002
Figure imgf000125_0001
Figure imgf000125_0002
Figure imgf000126_0001
Figure imgf000126_0002
Figure imgf000127_0001
EXAMPLE 14 Stability of nprE Variants
In this Example, experiments conducted to determine the stability of nprE variants are described. In these experiments, the methods describe prior to Example 1 were used to determine the performance indices (See, "NprE stability assays in the presence of detergent" above). The following tables provide the results for those variants with Performance Indices greater than one (PI>1) tested with and without DTPA.
The stability was measured by determining AGLA activity before and after incubation at elevated temperature. The table contains the relative stability values compared to WT under these conditions. It is the quotient of (Variant residual activity/WT residual activity). A value greater than one indicates higher stability in the presence of detergent. In Tables 14.1 and 14.2, data are provided showing the relative stability data of single-substitution variants of NprE relative to the stability of the WT NprE stability under these conditions, with and without DTPA.
In Tables 14.3 and 14.4, data are provided showing the relative stability data of multiple- substitution variants of NprE relative to the stability of the WT NprE stability under these conditions, with and without DTPA.
Table 14.1 Stability Results in the Presence of 25% TIDE® 2X with DTPA
Figure imgf000127_0003
Figure imgf000127_0002
Figure imgf000128_0001
Figure imgf000128_0002
Figure imgf000128_0003
Figure imgf000129_0001
Figure imgf000129_0002
Figure imgf000129_0003
Figure imgf000130_0003
Figure imgf000130_0001
Figure imgf000130_0002
Figure imgf000131_0001
Figure imgf000131_0002
Figure imgf000131_0003
Figure imgf000132_0001
Figure imgf000132_0002
Figure imgf000132_0003
Figure imgf000133_0002
Figure imgf000133_0001
Figure imgf000134_0001
Figure imgf000134_0002
Figure imgf000135_0001
Figure imgf000135_0002
Figure imgf000136_0001
Figure imgf000136_0002
Figure imgf000137_0002
Figure imgf000137_0001
Figure imgf000138_0001
Figure imgf000138_0002
Figure imgf000139_0002
Figure imgf000140_0001
Figure imgf000140_0002
Figure imgf000141_0002
Figure imgf000141_0001
The data in the following table (Table 14.5) represent the relative stability data of variants of NprE relative to the stability of the WT NprE stability in the citrate stability assay. The stability was measured by determining casein activity by determining AGLA activity before and after incubation at elevated temperature (See, "Citrate Stability Assay" above). The table contains the relative stability values compared to WT under these conditions. It is presented as the quotient of (Variant residual activity/WT residual activity). A value greater than one indicates higher stability in the presence of detergent.
Table 14.5. Citrate Stability Assay Results
Figure imgf000142_0002
Figure imgf000142_0003
Figure imgf000143_0001
Figure imgf000143_0002
Figure imgf000143_0003
Figure imgf000144_0003
Figure imgf000144_0001
Figure imgf000144_0002
EXAMPLE 15 pH Performance Profile of nprE Compared to BPN' 217L
In this Example, experiments conducted to evaluate the comparative performance of nprE and BPN' Y217L are described. In these experiments, EMPA 116 (BMI) and Equest grass stains were used.
Materials:
NprE, 8 mg/mL
BPN' Y217L, 25.6 mg/mL
EMPA 116 soil cloth, 3" x 4.5" (Testfabrics) Equest grass (med.), 3" x 4" (Warwick Equest)
EMPA 221 white cotton swatches, 3" x 4.5"
Minolta Chromameter CR200
TIDE® 2005 (provided by Procter & Gamble)
Water hardness concentrate: 15,000 grains per gallon (gpg), 3: 1 Ca:Mg I M Bis-TRIS-propane buffer
Cone, sulfuric acid
50 L mix tank with spigot and agitator
Terg-O-Tometer
DI Water
The swatches were prepared for treatment. Three replicates per treatment were conducted, with 18 swatches used per treatment. The grass swatches were prepared in a dark room to prevent fading. The reflectance values of about 18 soiled swatches were obtained using a Minolta Chromameter. Three readings were obtained per swatch. The L values, average L value and standard deviation were recorded. This is the LjnJtJ31 value.
The detergent solution was prepared as follows (for 40 L total). It was preferred to prepare this solution the night before testing. The solution was stored in the cold over night. The solution was prepared by adding 39.724 Kg of DI water to 50 L mix tank, starting the agitator, mixing in 60 grams of TIDE® liquid detergent, mixing in 16 mL of water hardness solution, and 200 mL of 1 M Bis-TRIS-propane. The pH was adjusted using concentrated sulfuric acid (adjusted to 0.2 pH units below desired pH, if solution was stored overnight), as pH creeps up overnight). The final concentrations were: TIDE® = 1.5 g/L; water hardness = 6 gpg; and Bis-TRIS-propane = 5 mM.
For testing in the Terg-O-Tometer, 1 L of detergent solution was added to each Terg pot and allowed to come to temperature. Enzyme was added to the pots at varying concentrations. For BMI tests, the enzyme concentrations used were 0 mg/L, 0.275 mg/L, 0.55 mg/ml, 1.65 mg/L, 2.65 mg/L, and 5,50 mg/L. For grass stains, the nprE concentrations used were 0 mg/L, 0.1925 mg/L, 0.385 mg/L, 1.155 mg/L, 1.925 mg/L, and 3.85 mg/L (the concentrations of BPN' Y217L were the same as those used in the BMI tests). Agitation was started and the swatches were added. All replicates were run side-by-side in the same Terg-O-Tometer (e.g., OX & V2 X in the 1st run, IX & 3X in the 2nd run, and 5X & 1OX in the 3rd run). The temperature was 15°C, the agitation speed was 100 cpm, and the wash time was 12 minutes. The treated swatches were rinsed three times in 4 L tap water (~6 gpg). The swatches were air-dried overnight on paper towels. The grass swatches were covered with paper towels and allowed to dry in a darkened room. The reflectance values of the dried swatches were determined as described above. Three readings were obtained per swatch. The L values, average L value and standard deviation were recorded. This is the Lfina! value.
The percentage of soil removal (%SR) was determined for each testing condition and both enzymes using the equation below:
Figure imgf000146_0001
(Lo — Ljnieiai)
Where: Lo = reflectance of unsoiled swatches Lineal = reflectance of soiled swatches
Lfinai = reflectance of washed swatches
The delta %SR over no enzyme control was determined using the following formula:
Δ%SR = %SRtreatment " %SRno enzyme control
BPN' Y217L was compared to nprE on EMPA 116 (BMI), at pH values of 6.7, 7.5, 8.5, and 9.5. The performance of nprE on EMPA 116 appeared to peak at about pH 8, while the performance of BPN' Y217L peaked at about pH 8.8. The results showed that nprE performed better than BPN' Y217L at pH 7.5 and 8.5, although it does not perform as well as BPN' Y217L at pH 6.7. The performance of these enzymes was equal at pH 9.5. In addition, there was no difference in the performance of these enzymes on Equest grass (med) at pH 7.8-8.4.
EXAMPLE 16 Comparison of PMN and nprE Enzymes in Liquid Detergent
This Example describes cleaning experiments to determine the cleaning performance of PMN and nprE. The cleaning performance of PMN and nprE enzymes were tested in Liquid TIDE® detergent in comparison with a benchmark serine protease (Protease A) on protease sensitive stains. As shown in the table below, PMN and nprE remove stains much better than protease A, even at low enzyme levels. In the following Tables, the higher SRI values indicate a better cleaning performance.
Table 16.1. Comparison of Cleaning Performance of PMN vs. Protease A in Liquid TIDE® (in full size washing machine)
Figure imgf000147_0001
Table 16.2. Comparison of Cleaning Performance of PMP vs. Protease A in Liquid TIDE® (in mini size washing machine)
Figure imgf000147_0002
Table 16.2. Comparison of Cleaning Performance of PMP vs. Protease A in Liquid TIDE® (in mini size washing machine)
Table 16.3. Comparison of Cleaning Performance of nprE vs. Protease A in Liquid TIDE® (in mini-size washing machine)
Figure imgf000148_0001
EXAMPLE 17 Thermostability of NprE and NprE Variants
In this Example, experiments conducted to determine the thermostability of NprE and NprE variants are described. The enzymes were produced and purified as described above. The purified proteins were judged to be sufficiently homogenous, with greater than 95% purity as determined using 10% SDS-PAGE, as only one major protein was observed in the gel. This protein was approximately 32 kDa, which is the molecular weight of the mature nprE sequence. The protein was formulated for storage using the 25 mM MES buffer, pH 5.8, containing 1 mM zinc chloride, 4 mM calcium chloride, and 40 % propylene glycol. The assays used in these experiments were the protease assay using fluorescence AGLA activity described above and differential scanning calorimetry (DSC), described below.
Differential Scanning Calorimetry (DSC)
Excessive heat capacity curves were measured using an ultrasensitive scanning high throughput microcalorimeter VP-Cap DSC (Microcal). The standard procedure for DSC measurements and the theory of the technique is well known to those of skill in the art (See e.g., Freire, 1995) Meth. MoI. Biol., 41, 191-218 [1995]). Briefly, approx. 500 uL of 200-400 ppm pure or ultrafiltrate concentrate (UFC) protein samples were needed. Typically, 400 ppm of NprE and the variant proteins (in the absence and presence 130 mM citrate) were scanned over 20-100 0C temperature range using a scan rate of 200 °C/hr in 5 mM HEPES, pH 8.0 buffer. The same sample was then rescanned to check the reversibility of the process. For NprE, the thermal unfolding process was irreversible. Scan rate dependence data of the thermal melting for NprE was assessed over a scan rate of 25 to 200°C/hr. The effect of various additives (e.g., primary and secondary alcohols, salts, cyclodextrin, PEG, sorbitol, glycerol) on the thermal melting point of NprE was also assessed.
Results
The thermal stability of wild-type NprE was determined at two different concentrations, in order to show the effect of protein concentration on the thermal melting point. The Tm values for 220 ppm and 440 ppm were determined to be 67.6 + 0.5 and 69.2 + 0.5 0C, respectively. The protein concentration effect highlights a second-order event. It is contemplated that this is either aggregation or autolysis. However, it is not intended that the present invention be limited to any particular mechanism. Nonetheless, these results indicate that for an accurate determination and any comparison of thermal melting points for NprE require that the protein concentrations be well matched. The effect of the scan rate on the thermal melting point also showed a dependence where the Tm was dependent on the scan rate up to 150 °C/hr, and then leveled off between 150- 200 °C/hr. Based on these results, 200 °C/hr was selected as the upper scan rate for all studies to minimize the dependence of the Tm on scan rate.
All data collected for NprE and variants are shown in Table 4. Table 4 also includes the DSC thermal melting points obtained for NprE and variants in the presence of 130 mM citrate. In most cases, two protein concentrations were scanned. As indicated in this Table, in the case of the scans in the presence of 130 mM citrate not all proteins showed a thermal unfolding profile.
Table 17. DSC Results
Figure imgf000150_0001
Figure imgf000151_0001
A representative Figure of the thermal unfolding profiles (DSC scans) for wild type and various mutants of NprE are shown in Figure 27. The unfolding profiles indicate the wild-type midpoint and show selective mutants that display increased thermal melting points relative to wild-type and those that display decreased melting points relative to wild-type. This Figure clearly highlights that the DSC distinguished between stable and less stable NprE variants, and is useful as a secondary screen. A general trend is observed between the thermal melting points of the variants and their stability in detergent. For example, the variants S66E, S199E, D220P/E, S 129FV are all winners in TIDE® and show an approximate 1 0C increase in thermal melting point relative to wild type NprE. This 1 0C increase in thermal melting point is small yet significant, as thermal stability typically requires multiple amino acid substitutions.
Figure 28 shows the thermal unfolding of NprE variants that display a thermal unfolding profile in the presence of 130 mM citrate. Citrate is a detergent component that rapidly causes the autolysis of NprE, in the absence of calcium. For wild-type NprE, there is no thermal unfolding profile in the presence of citrate, which is consistent with a protein that is already unfolded or lacks a well-formed hydrophobic core. Mutants that display a thermal unfolding profile in the presence of citrate are included in Table 17. These variants have thermal melting points in the range of 47- 56 0C. The DSC scans in the presence of 130 mM citrate indicated variants that are more stable than wild-type NprE to citrate. For example, citrate-stable variants are show to contain either S129I or S129V and combinatorials containing either of these substitutions show a + 50C increase in thermal melting point.
Effect of Additives on the Thermal Melting Points of NprE:
Figure 29 shows the results of experiments including various additives. The buffer was 5 mM HEPES, pH 8.0. The samples were scanned from 20 - 100 0C using a scan rate of 200°C/hr. In this Figure, the horizontal line represents the Tm for wild-type NprE with no additive. In these experiments, the data showed little or no effect on the thermal melting point (Tm) of NprE in the presence of these reagents. The inclusion of an inhibitor of NprE activity, namely phosphoramidon, was shown to increase the Tm by approx. I0C, suggesting that the inhibitor may impart some stabilization to NprE against the thermal unfolding process. None of the conditions above assisted in making the thermal unfolding process reversible. However, it is not intended that the present invention be limited to any particular mechanism.
EXAMPLE 18 NprE Homologue Stability in TIDE® and Homolog BMI Wash Performance
In this Example, experiments conducted to assess the stability of nprE homologs in TIDE®, as well as the wash performance of these homologs are described. Purified NprE ("NprE"), Bacillus subtilis NprE (B.S. NprE), Bacillus thuringiensis NprB (B.T. NprB) and Bacillus thermoproteolyticus thermolysin (TLN) were incubated in 200ul 25% tide in 1OmM HEPES, pH8 at lOug/ml at 25°C for 90 mins. The initial activities and remaining activities were measured using the AGLA assay, as described above. Briefly, lOul of sample were added into 200ul ofAGLA buffer (5OmM MES, pH6.5, 0.005% TWEEN®-80, 2.5mM CaCl2), then lOul of diluted sample was added into 200ul ofAGLA substrate (2.4mM Abz-AGLA-Nba in AGLA buffer). The excitation at 350nm and emission at 415 nm were monitored for first 100 seconds, the initial slope was recorded as enzyme activity. The percent of remaining activity was calculated by dividing the remaining activity over initial activity. Figure 30 provides a graph showing the remaining activity after 90 minutes.
To determine the wash performance of these homologues in TIDE®, one pre-washed BMI microswatch was first added into each well of a 96-well plate. Then, 190ul of Ix compact TIDE® (780ug/ml compact TIDE®, 5mM HEPES, pH8, 6gpg water hardness) were added.
Then, lOul of purified NprE, Bacillus subtilis NprE, Bacillus thuringiensis NprB and Bacillus thermoproteolyticus thermolysin were added to the wells to produce a final enzyme concentration is 0.25ug/ml. The plate was incubated at 25°C for 30mins with shaking at 1400rpm on Thermomixer. At the end of incubation, lOOul of supernatant were transferred into a new 96-well plate. The OD at 405nm of supernatant was then measured. The supernatant OD was subtracted with the OD of a blank control without enzyme addition. The performance index was calculated by dividing the OD of each homologue to the OD of NprE. Figure 31 provides a graph showing the BMI was performance of NprE, as well as the nprE homologs described herein . EXAMPLE 19 Metal Analysis of Wild-Type nprE and Variants
In this Example, experiments conducted to determine the zinc and calcium content of nprE and nprE variants are described. In these experiments, total trace metal analysis by inductively coupled plasma - mass spectrometry (ICPMS) and particle induced X-ray emission with a microfocused beam (micro-PIXE) were performed to confirm the zinc and calcium content of NprE. Overall, one zinc and two calcium ions are tightly bound.
All ICPMS and micro-PIXE samples were prepared in metal free buffer to remove any exogenous metal contaminants. Typically, 250 uL of 40 mg/mL NprE samples were buffer exchanged three times with 20 mM HEPES, pH 8.2 using YM-10 microdialysis apparatus. Metal free buffer was generated by passing the buffer through a column packed with Chelax 100 resin. The final protein concentration was determined using Bicinchoninic acid protein determination assay kit (BCA assay) from Sigma. ICPMS samples were analyzed at the West Coast Analytical Services, Inc. Micro-PIXE samples were analyzed at the Ion Beam Analysis Laboratory.
Table 19-1 shows ICPMS metal analysis results for calcium and zinc ions from NprE wild type. Relative to protein concentration, two calcium ions and two zinc ions were found to be present in the sample.
Figure imgf000154_0001
The MicroPIXE elemental composition analysis plot measured the metal contents relative to a protein internal standard. All peaks detected using Micro-PIXE were calculated relative to the sulfur peak arising from three methionines in the case of NprE. An observed large chloride ion peak was due to the presence of salt in buffer.
Table 18-2 shows the metal content determined by Micro-PIXE, which indicates that in general, NprE contains two tightly bound calcium and one zinc ion per protein molecule. Wild type NprE showed 1 zinc ion with 2 calcium ions. It is contemplated that calcium ions may have shown a low occupancy rate due to preparation of the sample. S58D and T60D showed close to two zinc ions per protein indicating a possible extra zinc ion binding to the site. The double variant has two added cysteines adding the accuracy of the technique. However, it is not intended that the present invention be limited to any particular embodiment with a specific number of ions.
Figure imgf000155_0001
Consistent with other well-characterized calcium and zinc dependent neutral proteases such as thermolysin or thermolysin-like proteases (ILPs)(See e.g., Dahlquist et al, Biochem., 15:1103-1111 [1976]; Srpingman et al, (1995) Biochemistry 34, 15713-15720 [1995]; and Willenbrock et al, (1995) FEBS Lett. 358:189-192 [1995]), NprE was found to contain at least two tightly bound calcium ions and one zinc ion per molecule. A potential third calcium binding site is proposed but expected to be very weak. Since all samples were desalted to remove any exogenous metals, these weakly bounding calcium sites are expected to be unoccupied. EXAMPLE 20 Stabilizing NprE with Calcium Formate in TIDE® Compact HDL Detergent
In this Example, experiments conducted to develop means to stabilize NprE in TIDE® compact HDL detergent are described. In these experiments, means to stabilize NprE by increasing the calcium formate level at a fixed citrate concentration while lowering DTPA content in experimental TIDE® compact formulation ("TIDE® 2x") were investigated. A statistical design of experiments (DOE) methodology was used in order to simplify the experiments as well as data analyses. It was shown that DTPA present in TIDE® adversely affects NprE stability, while addition of calcium formate helps overcome the detrimental effect in the full strength TIDE® compact formulation.
A full central composite response surface model with duplicate center points was used as a DOE method. A total of 16 unique formulations varying four components were pre-made according to the composition variations listed in Table 19.1. LAS was varied from 0 - 6% (w/w) with DTPA (0 - 0.25%) and calcium-formate (0 - 0.2%) at a fixed concentration of citric acid (1.9%). All other components of the TIDE® detergent were held constant. The component concentration boundary conditions were determined based on phase stability of the various mixes. The protein stability tests were conducted with 780 ppm nprE in the full strength (-100%) formulation mixes and incubated at 320C. Inactivation was measured up to 24 hours. All assays were done using red fluorescent labeled casein assay kit (Invitrogen) with 0.5 ppm protein concentration. Rates of NprE inactivation were measured in three independent experiments. DOE data were analyzed using DOE Fusion Pro (S-Matrix).
Figure imgf000156_0001
Figure imgf000157_0001
Table 20.2 and Figure 31 show the results of NprE stability measurements in various formulation mixes. Average rates and the standard deviation were the averaged NprE inactivation rate (hour"1) from three independent measurements. Qualitatively, formulations with low DTPA content with high calcium load tend to be more stable in the full strength compact TIDE®. As an example, Formulation #5, with no addition of DTPA and high calcium formate level showed the lowest inactivation rate, indicating high NprE stability. In contrast, Formulation #9, with high DTPA concentration with no added calcium formate showed lowest stability. In Table 20.2, the ranking is based on measured stability (Le., averaged rates). Runs are from three independent stability experiments.
Figure imgf000158_0001
Figure 33 shows NprE inactivation effects by DTPA at varying levels of fixed calcium formate concentration. Panel A shows rate of NprE inactivation by DTPA without any added calcium formate. The correlation shows that DTPA has significant detrimental effect. Panel B shows some decreased effect of DTPA with 0.1% calcium formate. Panel C shows significantly decreased effect of DTPA with 0.2% calcium formate.
Figure 34 shows DOE analysis software (Fusion Pro) generated prediction profile of DTPA and calcium formate composition based on response goal (decay rate) of less than 0.5 hr"1
(Panel A), 0.25 hr"1 (Panel B) and 0.05 hr"1 (Panel C). The shaded areas indicate DTPA and calcium formate composition ratios that are predicted to show stability with decay rate below the set goal. For example, 0.16% calcium formate in the presence of 0.04% DTPA would provide NprE stability with decay rate of less than 0.25 hour"1 as shown in Panel B of Figure 34. On the other hand, 0.08% calcium formate cannot sustain NprE stability with decay rate of at least 0.25 hour"1 in the presence of 0.16% DTPA.
EXAMPLE 21
Identification of the Citrate-induced Autolytic Sites for B. amyloliquefaciens Neutral
Metalloprotease NprE In this Example, methods used to assess the citrate-induced autolysis of wild-type and recombinant variant nprE {e.g., B. subtilis variant) are described. In these experiments, autolysis of the neutral metalloprotease from B. amyloliquefaciens (natural and the recombinant variant expressed in B. subtilis) was induced using sodium citrate (Sigma). The autolysis process was controlled by performing the reaction at 40C in 25 mM MES, pH 6.5, buffer. In these experiments, the autolysis of 0.4 mg/ml NprE was optimized by varying either: (a) the time of incubation (10-100 minutes) in 10 mM citrate; or (b) the citrate concentration (10-100 mM) over 100 minutes. A control of neutral metalloprotease diluted in buffer alone {i.e., no citrate) was incubated under similar conditions. The autolytic reactions were terminated by addition of an equal volume of IN HCl, the samples were precipitated using TCA and the pellet was washed and dried using acetone. The resultant pellet was resuspended in 20 uL buffer, pH 6.5, and 4X LDS sample buffer (NuPage, Invitrogen)
The autolytic fragments were resolved by 10 % (w/v) SDS-PAGE and electroblotted onto a PVDF membrane. The first 10 amino acid residues were sequenced by Edman degradation (Argo Bioanalytica). The partial amino acid sequences of the autolytic fragments were determined using trypsin in-gel digestion and analyzed using LCQ-MS (Agilent). The in-gel digestion process involved macerating the gel piece that contained the protein, removal of the Coomassie blue stain followed by re-hydration of the gel pieces in 25 mM NH4CO3 containing 2 M urea. Trypsin was added to the re-hydrated gel pieces for approx. 6 hours at 37 0C. Following the digestion, the peptides were extracted using acetonitrile and TCA. The peptides were separated on a C4-hydrophobic column (Vydac) using an acetonitrile- water gradient. The resultant peptide maps were searched with the SEQUEST® database search program against a database containing Genencor enzymes.
The amino acid sequences of the first 10 amino acids of each of the fragments were compared with the known amino acid sequence for B. amyloliquefaciens NprE. This enabled the identification of the amino acid at the N-termini and hence the cleavage site(s).
The generation of the citrate-induced fragments and their resolution was shown on 10 % SDS-PAGE. The sizes of the fragments were identified using a standard molecular weight marker from Invitrogen. In the presence of 10 inM citrate, two fragments in addition to remaining intact NprE were observed over the 100 minute time range. The two fragments formed at the low citrate concentration were found to be 24 kDa and 9 kDa in size. The intact nprE is 32 kDa. The 100-minute time range results in a good proportion of cleaved protein (i.e., the primary autolysis fragments). No additional fragments were observed or detected under these conditions. A study over 100 minutes in the presence of increasing citrate was performed to obtain the secondary autolytic fragments. In this experiment, when concentrations between 10 - 30 mM citrate were used, the two fragments described above were observed. At 40 mM citrate, less of the larger 24-kDa fragments were apparent however a 15-kDa fragment was also apparent. Between 50 - 100 mM citrate, the 24 kDa fragment and the*9-kDa fragments were no longer detected but three other fragments, of sizes 21 kDa, 15 kDa and 11 kDa, were observed.
The identity of the N-termini of the 24 kDa, 9 kDa (first two fragments), and the 21 kDa, 15 kDa and 11 kDa (the next autolytic fragments) were determined using Edman degradation (Argo Bioanalytica).
Figure imgf000161_0001
Bands Al, A 3 and A4 have the native N-terminal sequence that matches the N-terminus for the intact NprE. The sequencing report for Band A2 showed three fragments where the least intense sequence appeared to be identical to the more intense sequence, except that it was two residues and one residue shorter than the more intense sequences, respectively. This was consistent with a fraying of that particular protein fragment. The pattern and the sizes of the gel fragments suggest that the 15 kDa (Band A4) may be derived from the 21-kDa fragment (Band A3) and hence the C-terminus is deduced to be at or near position 198. However, it is not intended that the present invention be limited to this particular embodiment. Figure 35 provides the amino acid sequences for the various fragments (1-5 or Al-5 for
N-terminal sequencing purposes). Fragment 1 (Al) has the N-terminal residues equivalent to that for the intact native protein (SEQ ID NO:222), fragment 2 (Ad2) N-terminus starts at or near D220 (SEQ ID NO:223). The following two amino acid residues (A221 and G222) are also highlighted because this fragment was identified as being frayed. Fragment 3 (A3) (SEQ ID NO:224) and fragment 4 (A4) (SEQ ID NO:225) have the N-terminus of the intact protein, and fragment 5 (A5) (SEQ I DNO:226) starts at L198. The C-terminus of fragment 4 is likely to be at or near M138 (based on the size difference between A3 and A4). The corresponding fragment for A3 was not detected.
Trypsin digestion followed by LCQ-MS of the peptide maps for fragments 1 through 5 positively identified several amino acid peptides within the respective fragments. These are highlighted in Figure 35. The LCQ-MS provided a positive control for the identity of the fragments. Based on the N-terminal and LCQ-MS analysis of the cleavage fragments, primary cleavage sites were identified at amino acid positions D220, A221, G222, M138, and L198. These sites were targeted using site-directed mutagenesis and site-evaluation libraries of D220, A221, G222, L198, and M138, D139 were created. The mutant proteins were screened for increasing stability in detergent and for BMI-wash performance, as indicated herein. In some instances, the amino acids alongside these sites were also selected for protein engineering, in order to ensure that the clip site was indeed targeted.
The protein engineering results clearly indicated that amino acid substitutions of either Pro or GIu at D220 generated an NprE molecule that is more stable in detergent. In addition, additional stability was afforded to the NprE molecule by replacing G222 with Cys, and M138 with either He or Leu. In general, these specific amino acid substitutions provided the NprE with detergent stability advantages without the BMI-wash performance being compromised. Thus, these experiments provide important mapping data for the citrate-induced autolysis sites, facilitating the identification of key amino acid residues that alter and affect the overall stability of NprE. Citrate (a builder added to detergent matrices) destabilizes and autolyses NprE and is suggested to do so by chelating the essential calcium-bound atoms. The application of NprE in extreme detergent conditions requires that a more stable NprE molecule be used in these settings. In these experiments, substitutions of one or more of the autolytic sites of NprE have resulted in a more detergent-stable nprE molecule for use in these extreme detergents.
EXAMPLE 22 Liquid Laundry Detergent Compositions
In this Example, various formulations for liquid laundry detergent compositions are provided. The following liquid laundry detergent compositions of the present invention are prepared:
Figure imgf000162_0001
Figure imgf000163_0001
#1 : Add IN HCl aq. soln to adjust the neat pH of the formula in the range from about 3 to about
5. The pH of Examples above 22(I)-(II) is about 5 to about 7, and of 22(11I)-(V) is about 7.5 to about 8.5.
EXAMPLE 23 Hand Dish Liquid Detergent Compositions
In this Example, various hand dish liquid detergent formulations are provided. The following hand dish liquid detergent compositions of the present invention:
Figure imgf000164_0001
The pH of Examples 23(I)-(VI) is about 8 to about 11 EXAMPLE 24 Liquid Automatic Dishwashing Detergent Compositions
In this Example, various liquid automatic dishwashing detergent formulations are provided. The following hand dish liquid detergent compositions of the present invention:
Compound Formulations
I II III IV V
STPP 16 16 18 16 16
Potassium Sulfate - 10 8 - 10
1,2 propanediol 6.0 0.5 2.0 6.0 0.5
Boric Acid - - 4.0 3.0
CaCl2 dihydrate 0.04 0.04 0.04 0.04 0.04
Nonionic 0.5 0.5 0.5 0.5 0.5 nprE 0.1 0.03 - 0.03 -
PMN - - 0.05 - 0.06
Protease B - - - 0.01 -
Amylase 0.02 - 0.02 0.02 -
Aldose Oxidase - 0.15 0.02 - 0.01
Galactose Oxidase - - 0.01 - 0.01
PAAC 0.01 - - 0.01 -
DETBCHD _ 0.01 0.01
Balance to 100% perfume / dye and/or water
EXAMPLE 25 Granular and/or Tablet Laundry Compositions
This Example provides various formulations for granular and/or tablet laundry detergents. The following laundry compositions of present invention, which may be in the form of granules or tablet, are prepared.
Compound Formulations
I II III IV V
Base Product
C]4-Ci5AS or TAS 8.0 5.0 3.0 3.0 3.0
LAS 8.0 - 8.0 - 7.0
C12-C15AE3S 0.5 2.0 1.0 - - Compound Formulations
I II III IV V
C12-C15E5 Or E3 2.0 - 5.0 2.0 2.0
QAS - - - 1.0 1.0
Zeolite A 20.0 18.0 11.0 - 10.0
SKS-6 (dry add) - - 9.0 - -
MA/AA 2.0 2.0 2.0 - -
AA - - - - 4.0
3Na Citrate 2H2O - 2.0 - - -
Citric Acid (Anhydrous) 2.0 - 1.5 2.0 -
DTPA 0.2 0.2 - - -
EDDS - - 0.5 0.1 -
HEDP - - 0.2 0.1 -
PBl 3.0 4.8 - - 4.0
Percarbonate - - 3.8 5.2 -
NOBS 1.9 - - - -
NACA OBS - - 2.0 - -
TAED 0.5 2.0 2.0 5.0 1.00
BBl 0.06 - 0.34 - 0.14
BB2 - 0.14 - 0.20 -
Anhydrous Na Carbonate 15.0 18.0 - 15.0 15.0
Sulfate 5.0 12.0 5.0 17.0 3.0
Silicate - 1.0 - - 8.0 nprE 0.03 - 0.1 0.06 -
PMN - 0.05 - - 0.1
Protease B - 0.01 - - -
Protease C - - - 0.01 -
Lipase - 0.008 - - -
Amylase 0.001 - - - 0.001
Cellulase - 0.0014 - - -
Pectin Lyase 0.001 0.001 0.001 0.001 0.001
Aldose Oxidase 0.03 - 0.05 - -
PAAC - 0.01 - - 0.05
Balance to 100% Moisture and/or Minors*
* Perfume, dye, brightener / SRPl / Na carboxymethylcelMose/ photobleach / MgSO4 / PVPVI/ suds suppressor /high molecular PEG/clay. EXAMPLE 26 Liquid Laundry Detergents
This Example provides various formulations for liquid laundry detergents. The following liquid laundry detergent formulations of the present invention are prepared:
Compound Formulations
I I II III IV V
LAS 11.5 11.5 9.0 4.0
C12-C15AE2.85S - - 3.0 18.0 - 16.0
C14-C15E 2.5 S 11.5 11.5 3.0 - 16.0 -
C I2-C]3E9 - - 3.0 2.0 2.0 1.0
Figure imgf000167_0001
CFAA - - - 5.0 - 3.0
TPKFA 2.0 2.0 - 2.0 0.5 2.0
Citric Acid 3.2 3.2 0.5 1.2 2.0 1.2
(Anhydrous)
Ca formate 0.1 0.1 0.06 0.1 - -
Na formate 0.5 0.5 0.06 0.1 0.05 0.05
ZnC12 0.1 0.05 0.06 0.03 0.05 0.05
Na Culmene 4.0 4.0 1.0 3.0 1.2 -
Sulfonate
Borate 0.6 0.6 1.5 - - -
Na Hydroxide 6.0 6.0 2.0 3.5 4.0 3.0
Ethanol 2.0 2.0 1.0 4.0 4.0 3.0
1,2 Propanediol 3.0 3.0 2.0 8.0 8.0 5.0
Monoethanolamine 3.0 3.0 1.5 1.0 2.5 1.0
TEPAE 2.0 2.0 - 1.0 1.0 1.0 nprE 0.03 0.05 - 0.03 - 0.02
PMN - - 0.01 - 0.08 -
Protease A 0.01 _ Compound Formulations
I I II III IV V
Lipase - - - 0.00
Amylase - - - - 0.002
Cellulase - - - - 0.0001
Pectin Lyase 0.005 0.005 -
Aldose Oxidase 0.05 - - 0.05 0.02
Galactose oxidase - 0.04
PAAC 0.03 0.03 0.02 -
DETBCHD - - - 0.02 0.01
SRP l 0.2 0.2 - 0.1
DTPA - - - 0.3
PVNO - - - 0.3 0.2
Brightener 1 0.2 0.2 0.07 0.1
Silicone antifoam 0.04 0.04 0.02 0.1 0.1 0.1
Balance to 100% perfume/dye and/or water
EXAMPLE 27 High Density Dishwashing Detergents
This Example provides various formulations for high density dishwashing detergents. The following compact high density dishwashing detergents of the present invention are prepared:
Compound Formulations
I II III IV V VI
STPP - 45.0 45.0 - 40.0
3Na Citrate 2H2O 17.0 - 50.0 40.2 -
Na Carbonate 17.5 14.0 20.0 8.0 33.6
Bicarbonate - - 26.0
Silicate 15.0 15.0 8.0 - 25.0 3.6 Compound Formulations
I II III IV V VI
Metasilicate 2.5 4.5 4.5 - - -
PBl - - 4.5 - - -
PB4 - - - 5.0 - -
Percarbonate - - - - - 4.8
BBl - 0.1 0.1 - 0.5 -
BB2 0.2 0.05 - 0.1 - 0.6
Nonionic 2.0 1.5 1.5 3.0 1.9 5.9
HEDP 1.0 - - - - -
DETPMP 0.6 - - - - -
PAAC 0.03 0.05 0.02 - - -
Paraffin 0.5 0.4 0.4 0.6 - - nprE 0.072 0.053 - 0.026 - 0.01
PMN - - 0.053 - 0.059 -
Protease B - - - - - 0.01
Amylase 0.012 - 0.012 - 0.021 o.oc
Lipase - 0.001 - 0.005 - -
Pectin Lyase 0.001 0.001 0.001 - - -
Aldose Oxidase 0.05 0.05 0.03 0.01 0.02 0.01
BTA 0.3 0.2 0.2 0.3 0.3 0.3
Polycarboxylate 6.0 - - - 4.0 0.9
Perfume 0.2 0.1 0.1 0.2 0.2 0.2
Balance to 100% Moisture and/or Minors*
*Brightener / dye / SRPl / Na carboxymethylcellulose/ photobleach / MgSO4 / PVPVI/ suds suppressor /high molecular PEG/clay.
The pH of Examples 27(1) through (VI) is from about 9.6 to about 11.3. EXAMPLE 28 Tablet Detergent Compositions
This Example provides various tablet detergent formulations. The following tablet detergent compositions of the present invention are prepared by compression of a granular dishwashing detergent composition at a pressure of 13KN/cm^ using a standard 12 head rotary press:
Compound Formulations
I II Ill IV V VI VII VIII
STPP - 48.8 44.7 38.2 - 42.4 46.1 46.0
3Na Citrate 2H2O 20.0 _ - 35.9 _ -
Na Carbonate 20.0 5.0 14.0 15.4 8.0 23.0 20.0 -
Silicate 15.0 14.8 15.0 12.6 23.4 2.9 4.3 4.2
Lipase 0.001 - 0.01 - 0.02 - - -
Protease B 0.01 - - - - - -
Protease C - - - - - 0.01 - - nprE 0.01 0.08 - 0.04 - 0.023 - 0.05
PMN - - 0.05 - 0.052 - 0.023 -
Amylase 0.012 0.012 0.012 - 0.015 - 0.017 0.002
Pectin Lyase 0.005 - - 0.002 - - - -
Aldose Oxidase - 0.03 - 0.02 0.02 0.03 -
PBl - - 3.8 - 7.8 - - 4.5
Percarbonate 6.0 _ - 6.0 5.0 - -
BBl 0.2 - 0.5 - 0.3 0.2 - -
BB2 - 0.2 - 0.5 - - 0.1 0.2
Nonionic 1.5 2.0 2.0 2.2 1.0 4.2 4.0 6.5
PAAC 0.01 0.01 0.02 - - - -
DETBCHD - - - 0.02 0.02 - - -
TAED - - - - - 2.1 - 1.6
HEDP 1.0 - - 0.9 - 0.4 0.2 -
DETPMP 0.7 - - - - -
Paraffin 0.4 0.5 0.5 0.5 - - 0.5 -
BTA 0.2 0.3 . 0.3 0.3 0.3 0.3 0.3 -
Polycarboxylate 4.0 - - - 4.9 0.6 0.8 -
PEG 400-30,000 - - - - - 2.0 - 2.0
Glycerol - - - - - 0.4 - 0.5
Perfume - - - 0.05 0.2 0.2 0.2 0.2
Balance to 100% Moisture and/or Minors* *Brightener / SRPl / Na carboxymethylcellulose/ photobleach / MgSO4 / PVPVI/ suds suppressor /high molecular PEG/clay.
The pH of Examples 28(1) through 28(VII) is from about 10 to about 11.5; pH of 15(VIII) is from 8-10. The tablet weight of Examples 28(1) through 28(VIII) is from about 20 grams to about 30 grams.
EXAMPLE 29 Liquid Hard Surface Cleaning Detergents
This Example provides various formulations for liquid hard surface cleaning detergents. The following liquid hard surface cleaning detergent compositions of the present invention are prepared:
Compound Formulations
I II III IV V VI VII
C9-C]]E5 2.4 1.9 2.5 2.5 2.5 2.4 2.5
C]2-C14E5 3.6 2.9 2.5 2.5 2.5 3.6 2.5
C7-C9E6 - - - - 8.0 - -
C]2-C]4E2] 1.0 0.8 4.0 2.0 2.0 1.0 2.0
LAS - - - 0.8 0.8 - 0.8
Sodium culmene sulfonate 1.5 2.6 - 1.5 1.5 1.5 1.5
Isachem ® AS 0.6 0.6 - - - 0.6 -
Na2CO3 0.6 0.13 0.6 0.1 0.2 0.6 0.2
3Na Citrate 2H2O 0.5 0.56 0.5 0.6 0.75 0.5 0.75
NaOH 0.3 0.33 0.3 0.3 0.5 0.3 0.5
Fatty Acid 0.6 0.13 0.6 0.1 0.4 0.6 0.4
2-butyl octanol 0.3 0.3 - 0.3 0.3 0.3 0.3
PEG DME-2000® 0.4 - 0.3 0.35 0.5 - -
PVP 0.3 0.4 0.6 0.3 0.5 - -
MME PEG (2000) ® - - - - 0.5 0.5
Jeffamine ® ED-2001 - 0.4 - 0.5 - _
PAAC - - - 0.03 0.03 0.03 -
DETBCHD 0.03 0.05 0.05 - - - - nprE 0.07 - 0.08 0.03 - 0.01 0.04
PMN - 0.05 - - 0.06 - -
Protease B - - - - - 0.01 -
Amylase 0.12 0.01 0.01 - 0.02 - 0.01
Lipase - 0.001 - 0.005 - 0.005 -
Pectin Lyase 0.001 - 0.001 - - - 0.002
ZnC12 0.02 0.01 0.03 0.05 0.1 0.05 0.02 Compound Formulations
I II III IV V VI VII
Calcium Formate 0.03 0.03 0.01 - _
PBl . 4.6 - 3.8 -
Aldose Oxidase 0.05 _ 0.03 _ 0.02 0.02 0.05 Balance to 100% perfume / dye and/or water
The pH of Examples 29(1) through (VII) is from about 7.4 to about 9.5.
While particular embodiments of the present invention have been illustrated and described, it will be apparent to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.
All patents and publications mentioned in the specification are indicative of the levels of those skilled in the art to which the invention pertains. All patents and publications are herein incorporated by reference to the same extent as if each individual publication was specifically and individually indicated to be incorporated by reference. Having described the preferred embodiments of the present invention, it will appear to those ordinarily skilled in the art that various modifications may be made to the disclosed embodiments, and that such modifications are intended to be within the scope of the present invention.
Those of skill in the art readily appreciate that the present invention is well adapted to carry out the objects and obtain the ends and advantages mentioned, as well as those inherent therein. The compositions and methods described herein are representative of preferred embodiments, are exemplary, and are not intended as limitations on the scope of the invention. It is readily apparent to one skilled in the art that varying substitutions and modifications may be made to the invention disclosed herein without departing from the scope and spirit of the invention. The invention illustratively described herein suitably may be practiced in the absence of any element or elements, limitation or limitations which is not specifically disclosed herein. The terms and expressions which have been employed are used as terms of description and not of limitation, and there is no intention that in the use of such terms and expressions of excluding any equivalents of the features shown and described or portions thereof, but it is recognized that various modifications are possible within the scope of the invention claimed. Thus, it should be understood that although the present invention has been specifically disclosed by preferred embodiments and optional features, modification and variation of the concepts herein disclosed may be resorted to by those skilled in the art, and that such modifications and variations are considered to be within the scope of this invention as defined by the appended claims.
The invention has been described broadly and generically herein. Each of the narrower species and subgeneric groupings falling within the generic disclosure also form part of the invention. This includes the generic description of the invention with a proviso or negative limitation removing any subject matter from the genus, regardless of whether or not the excised material is specifically recited herein.

Claims

CLAIMSWe Claim:
1. An isolated neutral metalloprotease having improved storage stability, wherein said neutral metalloprotease is a Bacillus neutral metalloprotease.
2. The neutral metalloprotease of Claim 1, wherein said Bacillus is B. amyloliquefaciens.
3. The neutral metalloprotease of Claim 1, wherein said neutral metalloprotease has at least 45% amino acid identity with the neutral metalloprotease comprising SEQ ID NO:3 or SEQ ID NO: 18.
4. The neutral metalloprotease of Claim 1, wherein said neutral metalloprotease comprises the amino acid sequence set forth in SEQ ID NO:3 or SEQ ID NO: 18.
5. A nucleotide sequence encoding at least a portion of the neutral metalloprotease of Claim 1, wherein said nucleotide sequence is selected from of SEQ ID NOS:1, 2, 12, and 13.
6. An expression vector comprising a nucleotide sequence encoding the amino acid sequence set forth in SEQ ID NO:3.
7. A host cell comprising the expression vector of Claim 6.
8. A storage-stable neutral metalloprotease obtained from said host cell of Claim 7, wherein said neutral metalloprotease is encoded by said expression vector.
9. An isolated neutral metalloprotease having immunological cross-reactivity with the neutral metalloprotease of Claim 1.
10. The amino acid sequence set forth in SEQ ID NO: 18.
11. The amino acid sequence set forth in SEQ ID NO:3.
12. The amino acid sequence of Claim 10, wherein said sequence comprises at least one substitution of an amino acid made at a position equivalent to a position in a neutral metalloprotease comprising the amino acid sequence set forth in SEQ ID NO: 18, wherein said positions are selected from positions 1, 3, 4, 5, 6, 11, 12, 13, 14, 16, 21, 23, 24, 25, 31, 32, 33, 35, 36, 38, 44, 45, 46, 47, 48, 49, 50, 51, 54, 55, 58, 59, 60, 61, 62, 63, 65, 66, 69, 70, 76, 85, 86, 87, 88, 90, 91, 92, 96, 97, 98, 99, 100, 102, 109, 110, 111, 112, 113, 115, 117, 119, 127, 128, 129, 130, 132, 135, 136, 137, 138, 139, 140, 146, 148, 151, 152, 153, 154, 155, 157, 158, 159, 161, 162, 169, 173, 178, 179, 180, 181, 183, 184, 186, 190, 191, 192, 196, 198, 199, 200, 202, 203, 204, 205, 210, 211, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 228, 229, 237, 239, 240, 243, 244, 245, 248, 252, 253, 260, 261, 263, 264, 265, 267, 269, 270, 273, 277, 280, 282, 283, 284, 285, 286, 288, 289, 290, 292, 293, 296, 297, and 299.
13. An isolated neutral metalloprotease variant having an amino acid sequence comprising at least one substitution of an amino acid made at a position equivalent to a position in a neutral metalloprotease comprising the amino acid sequence set forth in SEQ ID NO: 18.
14. The isolated neutral metalloprotease variant of Claim 13, wherein said substitutions are made at positions equivalent to positions 1, 3, 4, 5, 6, 11, 12, 13, 14, 16, 21, 23, 24, 25, 31, 32, 33, 35, 36, 38, 44, 45, 46, 47, 48, 49, 50, 51, 54, 55, 58, 59, 60, 61, 62, 63, 65, 66, 69, 70, 76, 85, 86, 87, 88, 90, 91, 92, 96, 97, 98, 99, 100, 102, 109, 110, 111, 112, 113, 115, 117, 119, 127, 128, 129, 130, 132, 135, 136, 137, 138, 139, 140, 146, 148, 151, 152, 153, 154, 155, 157, 158, 159, 161, 162, 169, 173, 178, 179, 180, 181, 183, 184, 186, 190, 191, 192, 196, 198, 199, 200, 202, 203, 204, 205, 210, 211, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 228, 229, 237, 239, 240, 243, 244, 245, 248, 252, 253, 260, 261, 263, 264, 265, 267, 269, 270, 273, 277, 280, 282, 283, 284, 285, 286, 288, 289, 290, 292, 293, 296, 297, and 299, of a neutral metalloprotease comprising the amino acid sequence set forth in SEQ ID NO: 18.
15. The isolated variant neutral metalloprotease of Claim 14, wherein said protease comprises at least one mutation selected from T004C, T004E, T004H, T004I, T004K, T004L, T004M, T004N, T004P, T004R, T004S, T004V, T004W, T004Y, G012D, G012E, G012I, G012K, G012L, G012M, G012Q, G012R, G012T, G012V, G012W, K013A, K013C, K013D, K013E, K013F, K013G, K013H, K013I, K013L, K013M, K013N, K013Q, K013S, K013T, K013V, K013Y,T014F, T014G, T014H, T014I, T014KJ014L, T014M, T014P, T014Q, T014R, T014S, T014V, T014W, T014Y, S023A, S023D, S023F, S023G, S023I, S023K, S023L, S023M, S023N, S023P, S023Q, S023R, S023S, S023T, S023V, S023W, S023Y, G024A, G024D, G024F, G024G, G024H, G024I, G024K, G024L, G024M, G024N, G024P, G024R, G024S, G024T, G024V, G024W, G024Y, K033H, Q045C, Q045D, Q045E, Q045F, Q045H, Q045I, Q045K, Q045L, Q045M, Q045N, Q045P, Q045R, Q045T, Q045W, N046A, N046C, N046E, N046F, N046G, N046H, N046I, N046K, N046L, N046M, N046P, N046Q, N046R, N046S, N046T, N046V, N046W, N046Y, R047E, R047K, R047L, R047M, R47Q, R047S, R047T, Y049A, Y049C, Y049D, Y049E, Y049F, Y049H, Y049I, Y049K, Y049L, Y049N, Y049R, Y049S, Y049T, Y049V, Y049W, N050D, N050F, N050G, N050H, N050I, N050K, N050L, N050M, N050P, N050Q, N050R, N050W, N050Y, T054C, T054D, T054E, T054F, T054G, T054H, T054I T054K, T054L, T054M, T054N, T054P, T054Q, T054R, T054S, T054V, T054W, T054Y, S058D, S058H, S058I, S058L, S058N, S058P, S058Q, T059A, T059C, T059E, T059G, T059H, T059I, T059K, T059L T059M, T059N, T059P, T059Q, T059R, T059S, T059V,T059W, T060D, T060F, T060I, T060K, T060L, T060N, T060Q, T060R, T060V, T060W, T060Y, T065C, T065E,T065F, T065H, T065I, T065K, T065L, T065M, T065P, T065Q, T065R, T065V, T065Y, S066C, S066D, S066E, S066F, S066H, S066I, S066K, S066L,S066N, S066P, S066Q, S066R, S066T, S066V, S066W, S066Y, Q087A, Q087D, Q087E, Q087H, Q087I, Q087K, Q087L, Q087M, Q087N, Q087R, Q087S, Q087T, Q087V, Q087W, N090C, N090D, N090E, N090F, N090G, N090H, N090K, N090L, N090R, N090T, N096G, N096H, N096K, N096R, K097H, K097Q, K097W, KlOOA, KlOOD, KlOOE1 KlOOF, KlOOH, KlOON, KlOOP, KlOOQ, KlOOR, KlOOS, KlOOV, KlOOY, RIlOA, RIlOC, RIlOE, RIlOH, RIlOK, RI lOL, RIlOM, RIlON, RIlOQ, RIlOS, RIlOY, D119E, D119H, D119I, D119L, D119Q, D119R, D119S, D119T, D119V, D119W, G128C, G128F, G128H, G128K, G128L, G128M, G128N, G128Q, G128R, G128W, G128Y, S129A, S129C, S129D, S129F, S129G, S129H, S129I, S129K, S129L, S129M, S129Q, S129R, S129T, S129V, S129W, S129Y, F130I, F130K, F130L, F130M, F130Q, F130R, F130T, F130V, F130Y, S135P, G136I, G136L, G136P, G136V, G136W, G136Y, S137A,
M138I, M138K, M138L, M138Q, M138V, D139A, D139C, D139E, D139G, D139H, D139I, D139K, D139L, D139M, D139P, D139R, D139S, D139V, D139W, D139Y, V140C, Q151I, E152A, E152C, E152D, E152F, E152G, E152H, E152L, E152M, E152N, E152R, E152S, E152W, N155D, N155K, N155Q, N155R, D178A, D178C, D178G, D178H, D178K, D178L, D178M, D178N, D178P, D178Q, D178R, D178S, D178T, D178V, D178W, D178Y, T179A,
T179F, T179H, T179I, T179K, T179L, T179M, T179N, T179P, T179Q, T179R, T179S, T179V, T179W, T179Y, E186A, E186C, E186D, E186G, E186H, E186K, E186L, E186M, E186N, E186P, E186Q, E186R, E186S, E186T, E186V, E186W, E186Y, V190H, V190I, V190K, V190L, V190Q, V190R, S191F, S191G, S191H, S191I, S191K, S191L, S191N, S191Q, S191R, S191W, L198M, L198V, S199C, S199D, S199E, S199F, S199I, S199K, S199L, S199N, S199Q, S199R, S 199V, Y204H, Y204T, G205F, G205H, G205L, G205M, G205N, G205R, G205S, G205Y, K211A, K211C, K211D, K211G, K211M, K211N, K211Q, K211R, K211S, K211T, K211V, K214A, K214C, K214E, K214I, K214L, K214M, K214N, K214Q, K214R, K214S, K214V, L216A, L216C, L216F, L216H, L216Q, L216R, L216S, L216Y, N218K, N218P, T219D, D220A,D220E, D220H, D220K, D220N, D220P, A221D, A221E, A221F, A221I,
A221K, A221L, A221M, A221N, A221S, A221V, A221Y, G222C, G222H, G222N, G222R, Y224F, Y224H, Y224N, Y224R, T243C, T243G, T243H, T243I, T243K, T243L, T243Q, T243R, T243W, T243Y, K244A, K244C, K244D, K244E, K244F, K244G, K244L, K244M, K244N, K244Q, K244S, K244T, K244V, K244W, K244Y, V260A, V260D, V260E, V260G, V260H, V260I, V260K, V260L,V260M, V260P, V260Q, V260R V260S, V260T, V260W,
V260Y, Y261C, Y261F, Y261I, Y261L, T263E, T263F, T263H, T263I, T263L, T263M, T263Q, T263V, T263W, T263Y, S265A, S265C, S265D, S265E, S265K, S265N, S265P, S265Q, S265R,S265T, S265V, S265W, K269E, K269F, K269G, K269H, K269I, K269L, K269M, K269N, K269P, K269Q, K269S, K269T, K269V, K269W, K269Y, A273C, A273D, A273H, A273I, A273K, A273L, A273N, A273Q, A273R, A273Y, R280A, R280C, R280D, R280E, R280F, R280G, R280H, R280K, R280L, R280M, R280S, R280T, R280V, R280W, R280Y, L282F, L282G, L282H, L282I, L282K, L282M, L282N, L282Q, L282R, L282V, L282Y, S285A, S285C, S285D, S285E, S285K, S285P, S285Q, S285R, S285W, Q286A, Q286D, Q286E, Q286K, Q286P, Q286R, A289C, A289D, A289E, A289K, A289L, A289R, A293C, A293R, N296C, N296D, N296E, N296K, N296R, N296V, A297C, A297K, A297N, A297Q, A297R, and G299N.
16. The isolated variant neutral metalloprotease of Claim 13, wherein said protease comprises multiple mutations selected from S023W/G024M, T004V/S023W/G024W, S023W/G024Y/A288V, T004L/S023W/G024Y, N046Q/N050F/T054L, N050Y/T059R/S129Q, S023W/G024W, A273H/S285P/E292G, S023Y/G024Y, S023Y/G024W, T004S/S023Y/G024W, N046Q/T054K, S023W/G024Y, T004V/S023W, T059K/S066N, N046Q/N050W/T054H/T153A, T004V/S023W/G024Y, L282M/Q286P/A289R, N046Q/R047K/N050Y/T054K, L044Q/T263W/S285R, T004L/S023W/G024W, R047K/N050F/T054K, A273H/S285R, N050Y/T059K/S066Q, T054K/Q192K, N046Q/N050W, L282M/Q286K, T059K/S066Q, T004S/S023W, L282M/Q286R/A289R/K011N, L282M/A289R, N046Q/N050W/T054H, T059K/S129Q, T004S/S023N/G024Y/F210L, T004V/S023W/G024M/A289V, L282M/Q286K/A289R/S132T, N050W/T054H, L282M/Q286R, L282F/Q286K/A289R, T059R/S066Q, R047K/N050W/T054H, S265P/L282M/Q286K/A289R, L282M/Q286R/T229S, L282F/Q286K, T263W/S285R,
S265P/L282M/Q286K, T263H/A273H/S285R, T059R/S129V, S032T/T263H/A273H/S285R, T059R/S066Q/S129Q, T004S/G024W, T004V/S023W/G024M, T059K/S066Q/S129Q, L282M/Q286K/A289R/I253V, T004V/S023Y/G024W, T059R/S066N/S129Q, N050F/T054L, T004S/S023N/G024W, T059R/S066N, T059R/S066N/S129V, Q286R/A289R, N046Q/R047K/N050F/T054K, S265P/L282M/Q286P/A289R, S265P/L282M/Q286R/A289R Q062K/S066Q/S129I, S023N/G024W, N046Q/R047K/N050W/T054H, R047K/T054K, T004L/G024W, T014M/T059R/S129V, T059R/S066Q/N092S/S129I, R047K/N050W/T054K, T004V/G024W, N047K/N050F/T054K, S265P/L282F/Q286K/N061Y, L282F/Q286K/E159V, T004V/S023Y/G024M, S265P/L282F/A289R/T065S, T059K/F063L/S066N/S 129V, T004L/S023W, N050F/T054H, T059R/S066Q/S129V, V190I/D220E/S265W/L282F, T004S/S023Y/G024M, T004L/S023N/G024Y, T059K/S066N/S129I, T059R/S066N/S129I, L282M/Q286R/A289R/P162S, N046Q/N050F/T179N, T059K/Y082αS129V, T059K/S129I, N050Y/T054K, T059K/S066Q/V102A/S129Q, T059R/S066Q/S129I, T059W/S066N/S129V/S290R, T059R/S129I, T059K/S066Q/S129I, T059K/S066Q/S129V, S265P/L282M/Q286R/A289R/T202S/K203N, T004V/S023N/G024W, S265P/Q286K, S265P/L282F/A289R, D220P/S265W, L055F/T059W/S129V, T059R/S129Q/S191R, N050W/T054K, T004S/S023W/G024M, R047K/N050F/T054H, T059K/S066N/K088E, T059K/S066Q/S129I/V291L, L282M/Q286R/A289R, T059R/S066N/F085S/S129I, L282F/Q286P/A289R, L282F/Q286R/A289R, G099D/S265P/L282F/Q286K/A289R, N046Q/N050F, N050Y/T059W/S066N/S129V, T009I/D220P/S265N, V190F/D220P/S265W, N157Y/T263W/A273H/S285R, T263W/A273H/S285R, T263W/S285W, T004V/S023Y, N046Q/R047K/N050W, N050W/T054L, N200Y/S265P/L282F/Q286P/A289R, T059R/S066Q/P264Q, T004V/G024Y, T004L/G024Y, N050Y/S191I, N050Y/T054L, T004L/S023W/G024Y/N155K, F169I/L282F/Q286R/A289R, L282M/Q286K/A289R, F130L/M138L/E152W/D183N, N046Q/R047K/N050Y/T054H, T004V/G024M,
N050Y/T059W/S066Q/S129V, S023N/G024Y, T054H/P162Q, T004S/S023W/G024Y, N050Y/T054H, L282F/Q286R/A289R/F169I, R047K/N050W, V190F/D220P, L282M/F173Y, T004L/S023Y, N050W/A288D, V190I/D220P/S265Q, S265P/L282F/Q286P/A289R, S265P/L282F/Q286R/A289R, N046Q/N050Y/T054K, T059W/S066Q, T263W/A273H/S285W T263W/A273H/S285P, S023Y/G024M, T004L/S023N/G024W, T004V/S023N/G024Y, T059W/S066N/S129Q, T004S/S023Y, T004S/S023N/G024M, T059W/S066N/A070T, T059W/S066Q/S129Q, T263W/A273H, A273H/285P, N046Q/R047K/N050Y/T054L, N046Q/R047K/N050Y, R047K/N050Y, T263H/S285W, R047K/N050F, N046Q/R047K/N050F/T054H, S023N/G024M, T004S/G024Y, R047K/N050Y/T054H, T059W/S066N/S129I, R047K/T054L, T004S/S023W/G024W, M138L/E152F/T146S,
D220P/S265N, T004S/G024M, T004V/S023N, N046Q/N050F/T054K, N046Q/N050Y/T054H, Q062H/S066Q/S129Q, T059W/S129Q, T059W/S129V, N050F/T054K, R047K/N050F/T054L, V190I/D220P/S265W, N112I/T263H/A273H/S285R, T059W/S066N/S129V, T059W/S066Q/S129I, T059W/S129I, T263W/S285P, V190I/D220P, A289V/T263H/A273H, T263H/A273H/S285P, N90S/A273H/S285P, R047K/N050Y/T054L, T004S/S023N, T059R/S129Q, N046Q/R047K/T054H, T059W/S066Q/S129V, E152W/T179P, N050Y/S066Q/S129V, T202S/T263W/A273H, T263W/A273H/S285P, M138L/E152W/T179P, N046Q/R047K, N046Q/T054H/F176L, T004L/G024M, T004S/L282M, T263H/A273H, T263H/A273H/S285W, T004L/S023Y/G024M, L282F/Q286P, T004V/S023Y/G024Y, V190F/S265W, M138L/E152F, V190F/D220E/S265W, N046Q/N050F/T054H, N157Y/S285W, T004F/S023Y/G024M, T004V/S023N/G024M, L198I/D220E/S265Q,
N046Q/N050Y/T054K/A154T, S016L/D220E/S265W, D220E/S265W, D220E/A237S/S265W, S066Q/S129Q, V190F/D220E/S265Q/T267I, L282M/F173Y/T219S, E152F/T179P, V190I/S265W, M138L/S066Q, M138L/E152W, T059W/S066Q/A070T/S129I, V190F/D220E/S265N, V190F/S265N, N046Q/N050Y, and M138L/E152F/T179P.
17. The isolated variant neutral metalloprotease of Claim 13, wherein said protease comprises multiple mutations selected from V190I/D220P, V190I/D220P/S265Q, V190L/D220E, V190I/D220E/S265Q, V190I/D220E/S265W/L282F, V190L/D220E/S265Q, V190I/D220E/S265W, V190L/D220E/S265N, T059R/S066Q/S129I, V190I/D220E/S265N, V190L/D220E/S265W, V190I/D220E, T059W/S066N/S129V, T059K/S066Q/S129V, T059K/Y082C/S129V, T059R/S066N/S129I, S066Q/S129V, T059R/S066Q/S129V, T059R/S129I, N050Y/T059W/S066N/S129V, D220P/S265N, S066Q/S129I, T059W/S066Q/S129V, T059K/S066Q/S129I, T059R/S129V, N050Y/S066Q/S129V, T059W/S066Q/S129I, N050Y/T059W/S066Q/S129V, T059K/S129I, D220P/S265W, F130L/M138L/T179P, S066N/S129I, T059R/S066N/S129V, F130I/M138L/T179P, T059R/S066Q/N092S/S129I, S066N/S129V, D220E/S265Q, F130L/M138L/E152W/T179P, T059W/S129V, S265P/L282M/Q286R/A289R, S265P/L282F/Q286R/A289R, T059W/S066N/S 1291, V190I/D220P/S265W, F130L/E152W/T179P,
F130L/M138L/E152F/T179P, Q062K/S066Q/S129I, T059K/S066N/S129I, E152H/T179P, S265P/L282M/Q286K/A289R, F130L/M138L/E152H/T179P, T263W/A273H/S285R, D220E/S265N, F130I/M138L/E152H/T179P, F130V/M138L/E152W/T179P, F130I/M138L/E152W/T179P, T059W/S129I, D220E/S265W, F130V/M138L/T179P, F130L/E152V/T179P, T059R/S129Q, T263W/S285P, F130I/M138L/E152F/T179P, E152W/T179P, V190L/S265Q, F130L/E152F/T179P, L282M/Q286R/A289R/P162S, D220P/S265Q, M138L/E152F/T179P, F130I/E152H/T179P, M138L/E152W/T179P, F130L/T179P, F130L/M138L/E152W/T179P/Q286H, F130L/M138L/E152H, T263W/A273H/S285W, S265P/Q286K, T059W/S066Q/S129Q, T263W/S285R, T059W/S066N/S129Q, T263W/S285W, T059R/S066N/S129Q,
S265P/L282M/Q286R/A289R/T202S/K203N, T059W/S 129Q, Q062H/S066Q/S 129Q, L282M/Q286R/A289R, V190L/D220E/S265N/V291I, V190L/S265N, F130L/M138L/E152W, N050Y/T059R/S129Q, F130I/T179P, T059K/S066Q/S129Q, T059K/S129Q, S265P/L282M/Q286P/A289R, S265P/L282F/Q286P/A289R, T263W/A273H/S285P, S265P/L282M/Q286K, S016L/D220E/S265W, S066Q/S 129Q, S265P/L282M/Q286P,
L282F/Q286R/A289R, F130V/E152W/T179P, L044Q/T263W/S285R L055F/T059W/S129V, V190L/S265W, Q286R/A289R, G99D/S265P/L282F/Q286K/A289R, F130L/M138L/E152F, T059R/S066Q/S129Q, F130L/E152H, S066N/S129Q, T004S/S023N/G024M/K269N, S265P/L282M, E152F/T179P, T059W/S066N/S129V/S290R, L282F/Q286K/A289R, F130L/M138L, F130I/M138L/E152W, S265P/L282F, F130I/M138L/E152H,
F130V/M138L/E152H, V190I/S265Q, M138L/E152M, S265P/L282F/Q286P, M138L/E152H, T059K/S066N/K088E, V190I/S265W, F130L/E152W, L282M/Q286K/A289R, L282M/Q286K/A289R/I253V, T263W/A273H, V190I/S265N, M138L/E152W, A273H/S285R, F130I/M138L, F130L/E152F, F130V/M138L/E152W, T059K/S066Q/V102A/S129Q, F130V/E152H/T179P, F130I/M138L/E152F, F130V/M138L/E152F, M138L/E152F,
L282M/Q286R, F130I/E152H, S265P/L282F/A289R/T065S, T263H/A273H/S285R, F130V/M138L, T014M/T059R/S129V, L282M/Q286R/A289R/K11N, A273H/S285P, L282M/Q286K/A289R/S132T, T263H/A273H/S285W, F130V/E152W, S265P/L282F/Q286K/N061Y, F130I/E152W, L198I/D220E/S265Q, V190I/S265L, T263H/S285W, S265P/L282F/A289R, M138L/S066Q, F130I/E152F, N90S/A273H/S285P, S032T/T263H/A273H/S285R, L282F/Q286P/A289R, N157Y/T263W/A273H/S285R, V105A/S129V, T263H/A273H/S285P, S129Q/L282H, T059W/S066Q, F130V/E152H, S023W/G024Y, T004V/S023N, T059R/S066Q, N050W/T054L, L282M/Q286P/A289R, A115V/V190L/S265W, L282M/Q286K, T059R/S066N, L282F/Q286P, T004V/S023W/G024M, S265P/L282F/Q286R/L78H, L282F/Q286K, T004V/S023W/G024Y, S023W/G024M, T059R/R256S, F130V/E152F, T004V/G024W, N050W/T054K, S023Y/G024M, T004V/S023Y, T004V/S023Y/G024M, N050Y/T054H, S023W/G024W, T004V/S023Y/G024Y, T004V/S023N/G024W, F130L/M138L/E152F/T179P/V291I, N050Y/T059K/S066Q, T004V/S023Y/G024W, T059K/S066N, T004V/S023N/G024Y, S023Y/G024W, N050F/T054L, R047K/T054K, S023N/G024W, L282M/A289R, S023Y/G024Y, T004V/G024M,
R047K/N050F/T054K, N050F/T054K, T059K/S066Q, S023N/G024M, S023N/G024Y, T004L/S023N, R047K/N050W/T054H, T004L/S023W/G024Y, T004S/S023W, N046Q/N050W/T054H/A142T, T004L/S023Y, T004V/S023W, N050W/T054H, T004S/S023N, T004S/L282M, T004L/S023W, N050F/T054H, N050Y/T054L, and R047K/N050W/T054K.
18. The isolated variant neutral metalloprotease of Claim 13, wherein said protease comprises multiple mutations selected from S066Q/S129V, S066Q/S129I, N050Y/S066Q/S129V, S066N/S129I, T059K/S066Q/S129V, S066N/S129V, F130L/E152W/T179P, S265P/L282M/Q286R/A289R, F130L/E152V/T179P, T059K/S066Q/S129I, T263W/S285P, T059K/S066N/S129I, T263W/A273H/S285P, S265P/L282F/Q286R/A289R, F130V/E152W/T179P, T263W/A273H/S285R, V190I/D220P/S265W, F130L/E152H, S066N/S129Q, S265P/L282M/Q286K/A289R, V190I/D220E, T059R/S066N/S129I, V190I/D220E/S265W, T059K/S129I, T059R/S066Q/S129I, F130I/M138L/E152H/T179P, F130I/T179P, T263W/A273H/S285W, S016L/D220E/S265W, S066Q/S129Q, V190I/D220E/S265Q, T059R/S066Q/S129V, D220E/S265N, V190L/D220E, D220E/S265W, V190I/D220P, V190L/D220E/S265N, L044Q/T263W/S285R, S265P/L282M/Q286P/A289R, F130L/M138L/E152H/T179P, T263W/S285R, L282M/Q286R/A289R, T263W/S285W, F130LΕ152H/T179P, V190I/D220E/S265N, V190L/D220E/S265W, V190I/D220P/S265Q, T059R/S066N/S129V, V190L/D220E/S265Q, E152H/T179P, F130L/M138L/E152F/T179P, Q062H/S066Q/S129Q, T059R/S129V, V190I/D220E/S265W/L282F, V190I/S265Q, F130L/E152F/T179P, D220E/S265Q, E152W/T179P, T059K/S066Q/S129Q, F130L/M138L/T179P, F130I/M138L/E152F/T179P, F130L/M138L/E152W/T179P, N050Y/T059W/S066Q/S129V, S265P/L282M/Q286K, T059R/S129I, F130V/E152H/T179P, D220P/S265N, S265P/L282M/Q286P, F130I/E152H, T059R/S066Q/N092S/S129I, F130L/T179P, G99D/S265P/L282F/Q286K/A289R, T263W/A273H, V190I/S265N, D220P/S265W, F130L/E152W, F130L/M138L/E152H, S265P/L282M, V190I/S265Q, F130L/E152F, T059K/S129Q, Q286R/A289R, M138L/E152W/T179P, F130I/M138L/E152H, D220P/S265Q, V190L/S265N, F130I/M138L/E152W, S265P/Q286K, V190L/S265Q, V190I/S265W, F130L/M138L/E152F, F130V/E152H, E152F/T179P, N050Y/T059W/S066N/S129V, T059R/S066N/S129Q, F130I/E152W, F130V/E152W, T059R/S066Q/S129Q, T263H/A273H/S285P, N90S/A273H/S285P, V190L/D220E/S265N/V291I, T059R/S129Q, A273H/S285P, F130I/M138L/E152W/T179P, F130V/M138L/E152F, N050Y/T059R/S129Q, T059W/S066Q/S129I, F130V/M138L/T179P, F130V/M138L/E152W/T179P, V190L/S265W, F130V/M138L/E152W, T059W/S066Q/S129V, V190I/S265Q, F130V/M138L/E152H, F130I/E152F, N157Y/T263W/A273H/S285R, T263H/S285W, M138L/E152F/T179P, A115V/V190L/S265W, M138L/E152M, T263H/A273H/S285W, F130L/M138L/E152W, T059K/S066N/K088E, F130I/M138L/E152F, F130I/M138L/T179P, T004V/S023N, T059K/S066Q/V102A/S129Q, F130L/M138L, N047K/N050F/T054K, T263H/A273H/S285R, F130L/M138L/E152W/T179P/Q286H, M138L/E152H, M138L/S066Q,
L282M/Q286R/A289R/P162S, L282F/Q286R/A289R, Q062K/S066Q/S129I, A273H/S285R, S265P/L282F/Q286P, S265P/L282F/Q286P/A289R,
S265P/L282M/Q286R/A289R/T202S/K203N, T059W/S066N/S129I, V190I/S265L, T059W/S066N/S129V, F130I/M138L, L282M/Q286K/A289R/I253V, R047K/N050F/T054K, M138L/E152F, N050W/T054K, L198I/D220E/S265Q, L282F/Q286K/A289R, N050F/T054K, L282M/Q286R, M138L/E152W, S265P/L282F, F130V/E152F, T059W/S066N/S129Q, F130V/M138L, T263H/A273H, L282M/Q286K/A289R, N046Q/N050W/T054H/A142T, T059W/S066Q/S129Q, S265P/L282F/A289R/T065S, N050F/T054H, S129Q/L282H, L282M/Q286K/A289R/S132T, L282M/Q286R/A289R/K11N, T059K/S066N, R047K/N050W/T054K, T059K/S066Q, T004V/S023Y, T059W/S066N/S 129V/S290R, N050Y/T059K/S066Q, and R047K/N050Y.
19. A variant neutral metalloprotease having improved performance as compared to wild-type B. amyloliquefaciens neutral metalloprotease.
20. The variant neutral metalloprotease of Claim 19, wherein said improved performance comprises improved thermostability, as compared to wild-type B. amyloliquefaciens neutral metalloprotease.
21. The variant neutral metalloprotease of Claim 19, wherein said improved performance comprises improved performance under lower or higher pH conditions, as compared to wild-type B. amyloliquefaciens neutral metalloprotease.
22. The variant neutral metalloprotease of Claim 19, wherein said improved performance comprises improved autolytic stability, as compared to wild-type B. amyloliquefaciens neutral metalloprotease.
23. A method for producing an enzyme having neutral metalloprotease activity, comprising: transforming a host cell with an expression vector comprising a polynucleotide having at least 70% sequence identity to SEQ ID NO:3; and cultivating said transformed host cell under conditions suitable for the production of said neutral metalloprotease.
24. The method of Claim 23, further comprising the step of harvesting said produced neutral metalloprotease.
25. The method of Claim 23, wherein said host cell is a Bacillus species.
26. An isolated nucleic acid probe comprising 4 to 150 nucleotide sequence substantially identical to a corresponding fragment of SEQ ID NOS: 1, 2, 12 and/or 13.
27. The isolated nucleic acid probe of Claim 26, wherein said probe is used to detect a nucleic acid sequence coding for an enzyme having metalloproteolytic activity.
28. The nucleic acid sequence of Claim 27, wherein said nucleic acid sequence is obtained from a Bacillus sp.
29. A composition comprising at least one neutral metalloprotease obtained from B. amyloliquefaciens, wherein said composition further comprises at least one ion calcium and/or zinc ion.
30. A composition comprising at least one neutral metalloprotease obtained from B. amyloliquefaciens, wherein said composition further comprises at least one stabilizer.
31. The composition of Claim 30, wherein said stabilizer is selected from the group consisting of borax, glycerol, zinc ions, calcium ions, and calcium formate.
32. The composition of Claim 30, wherein said stabilizer is at least one competitive inhibitor that stabilizes said at least one neutral metalloprotease in the presence of an anionic surfactant.
33. A cleaning composition comprising the isolated neutral metalloprotease of Claim 1.
34. The cleaning composition of Claim 33, wherein said cleaning composition is a detergent.
35. The cleaning composition of Claim 33, further comprising at least one additional enzymes or enzyme derivatives selected from proteases, amylases, lipases, mannanases, pectinases, cutinases, oxidoreductases, hemicellulases, and cellulases
36. The cleaning composition of Claim 34, wherein said composition comprises at least about 0.0001 weight percent of said neutral metalloprotease.
37. The cleaning composition of Claim 36, wherein said composition comprises from about 0.001 to about 0.5 weight percent of said neutral metalloprotease.
38. The cleaning composition of Claim 36, wherein said composition further comprises at least one adjunct ingredient.
39. The cleaning composition of Claim 31 , further comprising a sufficient amount of a pH modifier to provide the composition with a neat pH of from about 3 to about 5, the composition being essentially free of materials that hydrolyze at a pH of from about pH 3 to about pH 5.
40. The cleaning composition of Claim 39, wherein said materials that hydrolyze at a pH of from about pH 3 to about pH 5 comprise at least one surfactant.
41. The cleaning composition of Claim 40, wherein said surfactant is a sodium alkyl sulfate surfactant comprising an ethylene oxide moiety.
42. The cleaning composition of Claim 33, wherein said composition is a liquid.
43. The cleaning composition of Claim 33, further comprising at least one acid- stable enzyme.
44. A method of cleaning, comprising the step of contacting a surface and/or an article comprising a fabric with the cleaning composition of Claim 33.
45. The method of Claim 44, further comprising the step of rinsing said surface and/or material after contacting said surface or material with said cleaning composition.
46. The method of Claim 44, wherein said surface and/or an article comprising a fabric comprises a grass stain and said step of contacting comprises said grass stain with said cleaning composition.
47. An animal feed composition comprising the isolated neutral metalloprotease of Claim 1.
48. A textile processing composition comprising the isolated neutral metalloprotease of Claim 1.
49. A leather processing composition comprising the isolated neutral metalloprotease of Claim 1.
PCT/US2006/040695 2005-10-12 2006-10-12 Use and production of storage-stable neutral metalloprotease WO2007044993A2 (en)

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EP06826175.9A EP1934340B1 (en) 2005-10-12 2006-10-12 Use and production of storage-stable neutral metalloprotease
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CA2624977A CA2624977C (en) 2005-10-12 2006-10-12 Use and production of storage-stable neutral metalloprotease
BRPI0617392-6A BRPI0617392A2 (en) 2005-10-12 2006-10-12 use and production of storage stable neutral metalloprotease
DK06826175.9T DK1934340T3 (en) 2005-10-12 2006-10-12 Use and preparation of a storage stable neutral metalloprotease
CN200680045537.3A CN101341248B (en) 2005-10-12 2006-10-12 Use and production of storage-stable neutral metalloprotease
KR1020137034836A KR20140027423A (en) 2005-10-12 2006-10-12 Use and production of storage-stable neutral metalloprotease
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