SPO11
Sign in to saveAlso known as CT35, SPATA43, TOPVIA, SPO11, initiator of meiotic double stranded breaks, SPO11 initiator of meiotic double stranded breaks, Meiotic recombination, Spo11, Meiotic_Spo11, IPR013048
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 recombination. 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.
Gene data
SPO11- Name
- SPO11 initiator of meiotic double strand breaks
- Type
- protein-coding
- Aliases
- CT35, SPATA43, TOPOVIA, TOPVIA
Meiotic recombination and chromosome segregation require the formation of double-strand breaks (DSBs) in paired chromosome homologs. During meiosis in yeast, a meiotic recombination protein is covalently-linked to the 5' end of DSBs and is essential for the formation of DSBs. The protein encoded by this gene is similar in sequence and conserved features to the yeast meiotic recombination protein. The encoded protein belongs to the TOP6A protein family. Several transcript variants encoding different isoforms have been found for this gene, but the full-length nature of only two of them have been described. [provided by RefSeq, Jul 2008].
via MyGene.info
Wikidata facts
Show 5 more facts
- HomoloGene ID
- 6059
- exact match
- identifiers.org/ncbigene/23626
- genomic end
- 55919050
- genomic start
- 57329803
- cytogenetic location
- 20q13.31
Sources (4)
via Wikidata · CC0
~4 min read
Article
3 sectionsContents
- Meiotic recombination
- Absence in some sexual species
- References
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 recombination. 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 can 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 topoisomerases. 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.