Human Pif1 helicase unwinds synthetic DNA structures resembling stalled DNA replication forks.
Human Pif1 helicase unwinds synthetic DNA structures resembling stalled DNA replication forks.
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DOI:
10.1093/nar/gkp671
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发表时间:
2009-10
影响因子:
14.9
通讯作者:
Sanders CM
中科院分区:
文献类型:
--
作者:
George T;Wen Q;Griffiths R;Ganesh A;Meuth M;Sanders CM
Pif-1 proteins are 5′→3′ superfamily 1 (SF1) helicases that in yeast have roles in the maintenance of mitochondrial and nuclear genome stability. The functions and activities of the human enzyme (hPif1) are unclear, but here we describe its DNA binding and DNA remodeling activities. We demonstrate that hPif1 specifically recognizes and unwinds DNA structures resembling putative stalled replication forks. Notably, the enzyme requires both arms of the replication fork-like structure to initiate efficient unwinding of the putative leading replication strand of such substrates. This DNA structure-specific mode of initiation of unwinding is intrinsic to the conserved core helicase domain (hPifHD) that also possesses a strand annealing activity as has been demonstrated for the RecQ family of helicases. The result of hPif1 helicase action at stalled DNA replication forks would generate free 3′ ends and ssDNA that could potentially be used to assist replication restart in conjunction with its strand annealing activity.
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影响因子:
14.9
作者:
Castella S;Bingham G;Sanders CM
通讯作者:
Sanders CM
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:
14.9
作者:
Gu, Yongqing;Masuda, Yuji;Kamiya, Kenji
通讯作者:
Kamiya, Kenji
DOI:
10.1073/pnas.80.17.5345
发表时间:
1983-01-01
期刊:
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
影响因子:
--
作者:
FOURY, F;KOLODYNSKI, J
通讯作者:
KOLODYNSKI, J