Human Rev1 polymerase disrupts G-quadruplex DNA.
Human Rev1 polymerase disrupts G-quadruplex DNA.
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DOI:
10.1093/nar/gkt1314
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发表时间:
2014-03
影响因子:
14.9
通讯作者:
Eoff RL
中科院分区:
文献类型:
--
作者:
Eddy S;Ketkar A;Zafar MK;Maddukuri L;Choi JY;Eoff RL
The Y-family DNA polymerase Rev1 is required for successful replication of G-quadruplex DNA (G4 DNA) in higher eukaryotes. Here we show that human Rev1 (hRev1) disrupts G4 DNA structures and prevents refolding in vitro. Nucleotidyl transfer by hRev1 is not necessary for mechanical unfolding to occur. hRev1 binds G4 DNA substrates with Kd,DNA values that are 4–15-fold lower than those of non-G4 DNA substrates. The pre-steady-state rate constant of deoxycytidine monophosphate (dCMP) insertion opposite the first tetrad-guanine by hRev1 is ∼56% as fast as that observed for non-G4 DNA substrates. Thus, hRev1 can promote fork progression by either dislodging tetrad guanines to unfold the G4 DNA, which could assist in extension by other DNA polymerases, or hRev1 can prevent refolding of G4 DNA structures. The hRev1 mechanism of action against G-quadruplexes helps explain why replication progress is impeded at G4 DNA sites in Rev1-deficient cells and illustrates another unique feature of this enzyme with important implications for genome maintenance.
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DOI:
10.1038/nrg3296
发表时间:
2012-11
期刊:
Nature reviews. Genetics
影响因子:
--
作者:
通讯作者:
--
影响因子:
56.9
作者:
Nair, DT;Johnson, RE;Aggarwal, AK
通讯作者:
Aggarwal, AK
影响因子:
64.5
作者:
BREWER, BJ;LOCKSHON, D;FANGMAN, WL
通讯作者:
FANGMAN, WL
影响因子:
4.8
作者:
Di Antonio, Marco;Rodriguez, Raphael;Balasubramanian, Shankar
通讯作者:
Balasubramanian, Shankar
影响因子:
64.5
作者:
HENDERSON, E;HARDIN, CC;BLACKBURN, EH
通讯作者:
BLACKBURN, EH