Cooperation of RAD51 and RAD54 in regression of a model replication fork.
Cooperation of RAD51 and RAD54 in regression of a model replication fork.
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DOI:
10.1093/nar/gkq1139
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发表时间:
2011-03
影响因子:
14.9
通讯作者:
Mazin AV
中科院分区:
文献类型:
--
作者:
Bugreev DV;Rossi MJ;Mazin AV
DNA lesions cause stalling of DNA replication forks, which can be lethal for the cell. Homologous recombination (HR) plays an important role in DNA lesion bypass. It is thought that Rad51, a key protein of HR, contributes to the DNA lesion bypass through its DNA strand invasion activity. Here, using model stalled replication forks we found that RAD51 and RAD54 by acting together can promote DNA lesion bypass in vitro through the ‘template-strand switch’ mechanism. This mechanism involves replication fork regression into a Holliday junction (‘chicken foot structure’), DNA synthesis using the nascent lagging DNA strand as a template and fork restoration. Our results demonstrate that RAD54 can catalyze both regression and restoration of model replication forks through its branch migration activity, but shows strong bias toward fork restoration. We find that RAD51 modulates this reaction; by inhibiting fork restoration and stimulating fork regression it promotes accumulation of the chicken foot structure, which we show is essential for DNA lesion bypass by DNA polymerase in vitro. These results indicate that RAD51 in cooperation with RAD54 may have a new role in DNA lesion bypass that is distinct from DNA strand invasion.
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DOI:
10.1038/nsb901
发表时间:
2003-03-01
期刊:
NATURE STRUCTURAL BIOLOGY
影响因子:
--
作者:
Alexeev, A;Mazin, A;Kowalczykowski, SC
通讯作者:
Kowalczykowski, SC
影响因子:
16
作者:
Amitani, Ichiro;Baskin, Ronald J.;Kowalczykowski, Stephen C.
通讯作者:
Kowalczykowski, Stephen C.
影响因子:
14.9
作者:
Kanagaraj, Radhakrishnan;Saydam, Nurten;Garcia, Patrick L.;Zheng, Lu;Janscak, Pavel
通讯作者:
Janscak, Pavel
影响因子:
64.8
作者:
Cox, MM;Goodman, MF;Marians, KJ
通讯作者:
Marians, KJ
影响因子:
4.8
作者:
Bugreev, Dmitry V.;Mazina, Olga M.;Mazin, Alexander V.
通讯作者:
Mazin, Alexander V.