Nothing Special   »   [go: up one dir, main page]

Spo11: Difference between revisions

Content deleted Content added
GreenC bot (talk | contribs)
Move 2 urls. Wayback Medic 2.5
mNo edit summary
 
(One intermediate revision by one other user not shown)
Line 1:
{{Short description|Protein-coding gene in the species Homo sapiens}}
{{Infobox_gene}}
 
'''Spo11''' is a [[protein]] that in humans is encoded by the ''SPO11'' [[gene]]. Spo11, in a complex with mTopVIB, creates double strand breaks to initiate meiotic [[genetic recombination|recombination]].<ref>{{cite journal | vauthors = Vrielynck N, Chambon A, Vezon D, Pereira L, Chelysheva L, De Muyt A, Mézard C, Mayer C, Grelon M | display-authors = 6 | title = A DNA topoisomerase VI-like complex initiates meiotic recombination | journal = Science | volume = 351 | issue = 6276 | pages = 939–43 | date = February 2016 | pmid = 26917763 | doi = 10.1126/science.aad5196 | bibcode = 2016Sci...351..939V | s2cid = 206643600 | url = https://www.science.org/doi/10.1126/science.aad5196 }}</ref><ref>{{cite journal | vauthors = Robert T, Nore A, Brun C, Maffre C, Crimi B, Bourbon HM, de Massy B | title = The TopoVIB-Like protein family is required for meiotic DNA double-strand break formation | journal = Science | volume = 351 | issue = 6276 | pages = 943–9 | date = February 2016 | pmid = 26917764 | doi = 10.1126/science.aad5309 | bibcode = 2016Sci...351..943R | s2cid = 9445593 | url = https://www.science.org/doi/10.1126/science.aad5309 }}</ref> Its active site contains a tyrosine which ligates and dissociates with DNA to promote break formation. One Spo11 protein is involved per strand of DNA, thus two Spo11 proteins are involved in each double stranded break event.
 
Genetic exchange between two DNA molecules by [[homologous recombination]] beginscan begin with a break in both strands of DNA—called a double-strand break—and recombination is started by an [[endonuclease]] enzyme that cuts the DNA molecule that "receives" the exchanged DNA. In [[meiosis]] the enzyme is SPO11, which is related to DNA [[topoisomerase]]s. Topoisomerases change DNA by transiently breaking one or both strands, passing the unbroken DNA strand or strands through the break and repairing the break; the broken ends of the DNA are covalently linked to topoisomerase. SPO11 is similarly attached to the DNA when it forms double-strand breaks during meiosis.<ref name="isbn0-7637-7992-X">{{cite book |title=Lewin's Genes X |edition=10th |publisher=Jones and Bartlett Publishers, Inc. |year=2011 |pages=353–354 |isbn=978-0-7637-7992-4 }}</ref>
 
== Meiotic recombination ==