JP6356694B2 - 改善された活性を有するdnaポリメラーゼ - Google Patents
改善された活性を有するdnaポリメラーゼ Download PDFInfo
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- JP6356694B2 JP6356694B2 JP2015546986A JP2015546986A JP6356694B2 JP 6356694 B2 JP6356694 B2 JP 6356694B2 JP 2015546986 A JP2015546986 A JP 2015546986A JP 2015546986 A JP2015546986 A JP 2015546986A JP 6356694 B2 JP6356694 B2 JP 6356694B2
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Description
(a)サーマス種Z05DNAポリメラーゼ(Z05)(配列番号1);
(b)サーマス・アクアティクスDNAポリメラーゼ(Taq)(配列番号2);
(c)サーマス・フィリホルミスDNAポリメラーゼ(Tfi)(配列番号3);
(d)サーマス・フラバスDNAポリメラーゼ(Tfl)(配列番号4);
(e)サーマス種sps17DNAポリメラーゼ(Sps17)(配列番号5);
(f)サーマス・サーモフィルスDNAポリメラーゼ(Tth)(配列番号6);及び
(g)サーマス・カルドフィルスDNAポリメラーゼ(Tea)(配列番号7)
から成る群から選択されるポリメラーゼに対して少なくとも80%、81%、82%、83%、84%、85%、86%、87%、88%、89%、90%、91%、92%、93%、94%、95%、96%、97%、98%、99%(少なくとも80%、好ましくは少なくとも90%、又は好ましくは少なくとも95%)のアミノ酸配列同一性を有する。
(a)サーモトガ・マリティマDNAポリメラーゼ(Tma)(配列番号34);
(b)サーモトガ・ネオポリタナDNAポリメラーゼ(Tne)(配列番号35)、
から成る群から選択されるポリメラーゼと少なくとも80%、81%、82%、83%、84%、85%、86%、87%、88%、89%、90%、91%、92%、93%、94%、95%、96%、97%、98%、99%(少なくとも80%、好ましくは少なくとも90%、又は好ましくは少なくとも95%)のアミノ酸配列同一性を有する。
他に断りがない限り、本明細書で用いる技術用語及び科学用語は全て、本発明が属する分野の当業者により一般的に理解されるものと同じ意味を有する。実質的に本明細書に記載のものと同様の任意の方法及び材料を本発明の実施又は試験に用いることができるが、例示的な方法と材料のみを記載する。本発明の目的上、以下の用語は下記のとおり定義される。
本発明は、ポリメラーゼドメイン内の1若しくは複数のアミノ酸が機能的なDNAポリメラーゼに対して変異させた、改善されたDNAポリメラーゼを提供する。本発明のDNAポリメラーゼは、(例えば、Mn2+やMg2+の二価の陽イオンの存在下で)非改変型のポリメラーゼに対して高い逆転写酵素効率、及び/又は高いミスマッチ耐性、伸張速度、並びにRT及びポリメラーゼ阻害剤に対する耐性を有する活性酵素である。特定の実施形態において、突然変異DNAポリメラーゼは、親酵素より優れた又は同等な性能のためにより低い濃度で使用され得る。いくつかの実施形態において、突然変異DNAポリメラーゼは、高い逆転写酵素効率を有しながら、非改変又は対照ポリメラーゼに対して実質的に同じDNA依存性ポリメラーゼ活性を保有している。
Asp−X1−X2−Lys−X3−Ala−Met−X4−X5−X6−X7−X8−X9−Leu
(本明細書中、一文字コードで、D−X1−X2−K−X3−A−M−X4−X5−X6−X7−X8−X9−Lとも表される)(配列番号38);
式中:
X1はLeu(L)又はIle(I)であり;
X2はMet(M)又はIle(I)以外に任意のアミノ酸であり;
X3はLeu(L)、Ile(I)又はLys(K)であり;
X4はVal(V)又はIle(I)であり;
X5はLys(K)、Arg(R)、Glu(E)、Asp(D)、Asn(N)又はGln(Q)であり;
X6はLeu(L)又はIle(I)であり;
X7はPhe(F)、Asp(D)、His(H)、Ser(S)又はAsn(N)であり;
X8はPro(P)、Arg(R)、Glu(E)、Asn(N)、Val(V)又はAla(A)であり;
X9はHis(H)、Arg(R)、Glu(E)又はGln(Q)である、
を有することを特徴とし得る。
Asp−Leu−X2−Lys−Leu−Ala−Met−Val−X5−Leu−Phe−Pro−X9−Leu
(本明細書中、一文字コードで、D−L−X2−K−L−A−M−V−X5−L−F−P−X9−Lとも表される)(配列番号9);
式中:
X2は、Met(M)以外の任意のアミノ酸であり;
X5は、Lys(K)又はArg(R)であり;
X9は、His(H)又はArg(R)である、
を有することを特徴とし得る。
Asp−Leu−X2−Lys−Leu−Ala−Met−Val−Lys−Leu−Phe−Pro−His−Leu
(本明細書中、一文字コードで、D−L−X2−K−L−A−M−V−K−L−F−P−H−Lとも表される)(配列番号10);
式中:
X2は、Met(M)以外の任意のアミノ酸である、
を有することを特徴とし得る。
Asp−Leu−X2−Lys−Leu−Ala−Met−Val−Lys−Leu−Phe−Pro−His−Leu
(本明細書中、一文字コードで、D−L−X2−K−L−A−M−V−K−L−F−P−H−Lとも表される)(配列番号11);
式中:
X2は、Thr(T)である、
有することを特徴とし得る。
Thr−Gly−Arg−Leu−Ser−Ser−X7−X8−Pro−Asn−Leu−Gln−Asn(本明細書中、一文字コードで、T−G−R−L−S−S−Xb7−Xb8−P−N−L−Q−Nとも表される)(配列番号38);
式中:
X7は、Ser(S)又はThr(T)であり;そして
X8は、Asp(D)又はGlu(E)を除いた任意のアミノ酸である、
がさらに含まれる。
X1−X2−X3−X4−X5−X6−X7−X8−X9−X10−X11−X12−X13−Gly−Tyr−Val−X14−Thr−Leu(本明細書中、一文字コードで、X1-X2−X3−X4−X5−X6−X7−X8−X9−X10−X11−X12−X13−G−Y−V−X14−T−Lとも表される)(配列番号29);
式中:
X1は、Ala(A)、Asp(D)、Ser(S)、Glu(E)、Arg(R)又はGin(Q)であり;
X2は、Trp(W)又はTyr(Y)であり;
X3は、Ile(I)、Leu(L)又はMet(M)以外の任意のアミノ酸であり;
X4は、Glu(E)、Ala(A)、Gin(Q)、Lys(K)、Asn(N)又はAsp(D)であり;
X5は、Lys(K)、Gly(G)、Arg(R)、Gin(Q)、His(H)又はAsn(N)であり;
X6は、Thr(T)、Val(V)、Met(M)又はIle(I)であり;
X7は、Leu(L)、Val(V)又はLys(K)であり;
X8は、Glu(E)、Ser(S)、Ala(A)、Asp(D)又はGin(Q)であり;
X9は、Glu(E)又はPhe(F)であり;
X10は、Gly(G)又はAla(A)であり;
X11は、Arg(R)又はLys(K)であり;
X12は、Lys(K)、Arg(R)、Glu(E)、Thr(T)又はGin(Q)であり;
X13は、Arg(R)、Lys(K)又はHis(H)であり;そして
X14は、Glu(E)、Arg(R)又はThr(T)である、
がさらに含まれる。
実施例1:ライブラリー作製
簡単に言えば、このスクリーニング過程における工程には、ライブラリー作製、変異酵素の発現及び部分精製、所望の性質をもつ酵素のスクリーニング、DNAシークエンシング、クローン精製、選択された変異体候補のさらなる特性評価が含まれた。これらの工程のそれぞれについて、以下にさらに説明する。
フォワードプライマー:5’−CTACCTCCTGGACCCCTCCAA−3’(配列番号30);及び
リバースプライマー:5’−ATAACCAACTGGTAGTGGCGTGTAA−3’(配列番号31)。
改善された逆転写効率に関する、抽出物ライブラリのスクリーニング:抽出物ライブラリを、pSP64ポリ(A)(Promega)を用いてHCV遺伝子型Ib5’NTRの最初の800塩基を含むC型肝炎ウイルス(HCV)転写産物JP2−5からの240塩基対の増幅産物の増幅から、RT−PCRシステムにより未精製の酵素抽出物の蛍光5’ヌクレアーゼ(TaqMan)活性によって作成される成長曲線からのCp(クロッシングポイント)値を比較することによってスクリーニングした。
Claims (12)
- 対照DNAポリメラーゼと比較して、高い逆転写酵素効率を有するDNAポリメラーゼであって、
配列番号1と少なくとも90%同一のアミノ酸配列を含んでなり、
配列番号1の763位に対応する前記DNAポリメラーゼのアミノ酸がTであり、
配列番号1の709位に対応する前記DNAポリメラーゼのアミノ酸がKであり、
配列番号1の580位に対応する前記DNAポリメラーゼのアミノ酸がGであり、
そして前記対照DNAポリメラーゼは、配列番号1の763位に対応する前記対照DNAポリメラーゼのアミノ酸がMであることを除き、前記DNAポリメラーゼと同一のアミノ酸配列を有する、
前記DNAポリメラーゼ。 - 前記DNAポリメラーゼが、配列番号1と少なくとも95%同一のアミノ酸配列を含んでなる、請求項1に記載のDNAポリメラーゼ。
- 対照DNAポリメラーゼと比較して、同一のDNA依存性ポリメラーゼ活性を有する、請求項1又は2に記載のDNAポリメラーゼ。
- 請求項1〜3のいずれか1項に記載のDNAポリメラーゼをコードする組換え核酸。
- 請求項4に記載の組換え核酸を含んでなる発現ベクター。
- 請求項5に記載の発現ベクターを含んでなる宿主細胞。
- DNAポリメラーゼを生産する方法であって、請求項6に記載の宿主細胞を培養することを含んでなる方法。
- プライマー伸長を行うための方法であって:
請求項1〜3のいずれか1項に記載のDNAポリメラーゼとプライマー、鋳型ポリヌクレオチド及びヌクレオシド三リン酸とを接触させ、伸長プライマーを生成することを含んでなる、方法。 - 伸長プライマーを生成するためのキットであって:
請求項1〜3のいずれか1項に記載のDNAポリメラーゼを含む少なくとも1つの容器を含んでなる、キット。 - (a)プライマー伸長条件下で、所定の鋳型ポリヌクレオチドにハイブリダイズ可能なプライマーを含む容器;
(b)ヌクレオシド三リン酸を含む容器;及び
(c)バッファーを含む容器、
から成る群から選択される1若しくは複数の追加の容器をさらに含んでなる、請求項9に記載のキット。 - 請求項1〜3のいずれか1項に記載のDNAポリメラーゼ、少なくとも1つのプライマー、鋳型ポリヌクレオチド及びヌクレオシド三リン酸を含んでなる反応混合物。
- 第二の耐熱性DNAポリメラーゼをさらに含んでなる、請求項11に記載の反応混合物。
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US201261736737P | 2012-12-13 | 2012-12-13 | |
US61/736,737 | 2012-12-13 | ||
PCT/EP2013/076147 WO2014090836A1 (en) | 2012-12-13 | 2013-12-11 | Dna polymerases with improved activity |
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US9506045B2 (en) | 2012-12-13 | 2016-11-29 | Roche Molecular Systems, Inc. | DNA polymerases with improved activity |
GB201604876D0 (en) * | 2016-03-22 | 2016-05-04 | Uni I Tromsø Norges Arktiske Uni | Marine DNA polymerases |
JP6871271B2 (ja) | 2016-05-13 | 2021-05-12 | エフ.ホフマン−ラ ロシュ アーゲーF. Hoffmann−La Roche Aktiengesellschaft | Dlbclを分類するための方法および組成物 |
CN109790568B (zh) | 2016-08-18 | 2022-09-20 | 豪夫迈·罗氏有限公司 | 用于检测雌激素受体esr1突变的多路等位基因特异性pcr测定 |
CN106399299B (zh) * | 2016-09-29 | 2019-01-29 | 华南理工大学 | 一种通过点突变提高大片段嗜热脂肪地芽孢杆菌dna聚合酶活性的方法及应用 |
EP3541958A1 (en) | 2016-11-15 | 2019-09-25 | Ventana Medical Systems, Inc. | Compositions and methods for prognosing and treating colorectal cancer |
EP3546576A4 (en) * | 2016-11-22 | 2020-06-17 | Toyobo Co., Ltd. | MODIFIED HEAT RESISTANT DNA POLYMERASE |
EP3613851A4 (en) | 2017-01-09 | 2020-07-01 | MGI Tech Co., Ltd. | RECOMBINANT DNA POLYMERASE |
WO2019005955A1 (en) | 2017-06-27 | 2019-01-03 | Yale University | ENHANCED REVERSE TRANSCRIPTASE AND METHODS OF USE THEREOF |
US11584960B2 (en) | 2017-09-13 | 2023-02-21 | Roche Molecular Systems, Inc. | Multiplex detection of short nucleic acids |
EP3720970A1 (en) | 2017-12-08 | 2020-10-14 | H. Hoffnabb-La Roche Ag | Detection of nucleic acids from platelet enriched plasma samples |
CN111670254B (zh) | 2018-02-20 | 2024-10-11 | 豪夫迈·罗氏有限公司 | 微卫星不稳定性的改进检测 |
WO2019180137A1 (en) | 2018-03-21 | 2019-09-26 | F. Hoffmann-La Roche Ag | Dna polymerases for efficient and effective incorporation of methylated-dntps |
US12018294B2 (en) | 2018-07-13 | 2024-06-25 | Takara Bio Inc. | DNA polymerase mutant suited to nucleic acid amplification from RNA |
JP7342403B2 (ja) * | 2019-03-29 | 2023-09-12 | 東洋紡株式会社 | 改変されたdnaポリメラーゼ |
CN112175980B (zh) * | 2019-07-04 | 2022-10-11 | 赛纳生物科技(北京)有限公司 | 通过定点突变提高聚合酶大片段活性的方法及应用 |
CN111849939B (zh) * | 2020-07-16 | 2022-03-22 | 浙江大学 | 一种缺口dna偏好性高保真聚合酶及其应用 |
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DE19653494A1 (de) | 1996-12-20 | 1998-06-25 | Svante Dr Paeaebo | Verfahren zur entkoppelten, direkten, exponentiellen Amplifikation und Sequenzierung von DNA Molekülen unter Zugabe einer zweiten thermostabilen DNA Polymerase und dessen Anwendung |
EP2145956B1 (en) * | 2003-11-03 | 2015-06-17 | Medical Research Council | Polymerase |
US7417133B2 (en) * | 2004-02-27 | 2008-08-26 | Institut Pasteur | Methods for obtaining thermostable enzymes, DNA polymerase I variants from Thermus aquaticus having new catalytic activities, methods for obtaining the same, and applications of the same |
US8962293B2 (en) * | 2006-10-18 | 2015-02-24 | Roche Molecular Systems, Inc. | DNA polymerases and related methods |
WO2011014885A1 (en) * | 2009-07-31 | 2011-02-03 | Agilent Technologies, Inc. | Thermostable type-a dna polymerase mutants with increased polymerization rate and resistance to inhibitors |
WO2012097318A2 (en) * | 2011-01-14 | 2012-07-19 | Kap Abiosystems | Modified dna polymerases for improved amplification |
CA2831180C (en) | 2011-04-11 | 2017-02-14 | Keith Bauer | Dna polymerases with improved activity |
CN103998603B (zh) * | 2011-12-08 | 2016-05-25 | 霍夫曼-拉罗奇有限公司 | 具有改进活性的dna聚合酶 |
JP6140182B2 (ja) * | 2011-12-08 | 2017-05-31 | エフ.ホフマン−ラ ロシュ アーゲーF. Hoffmann−La Roche Aktiengesellschaft | 改善された活性を有するdnaポリメラーゼ |
WO2013083264A1 (en) * | 2011-12-08 | 2013-06-13 | Roche Diagnostics Gmbh | Dna polymerases with improved activity |
US9506045B2 (en) | 2012-12-13 | 2016-11-29 | Roche Molecular Systems, Inc. | DNA polymerases with improved activity |
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WO2014090836A1 (en) | 2014-06-19 |
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US9506045B2 (en) | 2016-11-29 |
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