Organism
Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Function
Repair polymerase. Involved in gap-filling in DNA nonhomologous end joining (NHEJ) required for double-strand break repair. Seems to conduct DNA synthesis in a stepwise distributive fashion rather than in a processive fashion as for other DNA polymerases. Preferentially acts upon short gaps formed by the alignment of linear duplexes with complementary single-strand ends. Required for filling gaps that need removal of a 5'- or 3'-terminal mismatch, however lacks nuclease activities.
Similarity
Belongs to the DNA polymerase type-X family.
Sequence
MSLKGKFFAFLPNPNTSSNKFFKSILEKKGATIVSSIQNCLQSSRKEVVILIEDSFVDSDMHLTQKDIFQREAGLNDVDEFLGKIEQSGIQCVKTSCITKWVQNDKFAFQKDDLIKFQPSIIVISDNADDGQSSTDKESEISTDVESERNDDSNNKDMIQASKPLKRLLQGDKGRASLVTDKTKYKNNELIIGALKRLTKKYEIEGEKFRARSYRLAKQSMENCDFNVRSGEEAHTKLRNIGPSIAKKIQVILDTGVLPGLNDSVGLEDKLKYFKNCYGIGSEIAKRWNLLNFESFCVAAKKDPEEFVSDWTILFGWSYYDDWLCKMSRNECFTHLKKVQKALRGIDPECQVELQGSYNRGYSKCGDIDLLFFKPFCNDTTELAKIMETLCIKLYKDGYIHCFLQLTPNLEKLFLKRIVERFRTAKIVGYGERKRWYSSEIIKKFFMGVKLSPRELEELKEMKNDEGTLLIEEEEEEETKLKPIDQYMSLNAKDGNYCRRLDFFCCKWDELGAGRIHYTGSKEYNRWIRILAAQKGFKLTQHGLFRNNILLESFNERRIFELLNLKYAEPEHRNIEWEKKTA