Human DNA helicase B functions in cellular homologous recombination and stimulates Rad51-mediated 5'-3' heteroduplex extension in vitro.
Human DNA helicase B functions in cellular homologous recombination and stimulates Rad51-mediated 5'-3' heteroduplex extension in vitro.
复制标题
DOI:
10.1371/journal.pone.0116852
复制
发表时间:
2015
期刊:
影响因子:
3.7
通讯作者:
Fanning E
中科院分区:
文献类型:
--
作者:
Liu H;Yan P;Fanning E
Homologous recombination is involved in the repair of DNA damage and collapsed replication fork, and is critical for the maintenance of genomic stability. Its process involves a network of proteins with different enzymatic activities. Human DNA helicase B (HDHB) is a robust 5′-3′ DNA helicase which accumulates on chromatin in cells exposed to DNA damage. HDHB facilitates cellular recovery from replication stress, but its role in DNA damage response remains unclear. Here we report that HDHB silencing results in reduced sister chromatid exchange, impaired homologous recombination repair, and delayed RPA late-stage foci formation induced by ionizing radiation. Ectopically expressed HDHB colocalizes with Rad51, Rad52, RPA, and ssDNA. In vitro, HDHB stimulates Rad51-mediated heteroduplex extension in 5′-3′ direction. A helicase-defective mutant HDHB failed to promote this reaction. Our studies implicate HDHB promotes homologous recombination in vivo and stimulates 5′-3′ heteroduplex extension during Rad51-mediated strand exchange in vitro.
登录
查看更多内容
影响因子:
5.6
作者:
Liu, YL;Stasiak, AZ;West, SC
通讯作者:
West, SC
影响因子:
4.8
作者:
New, JH;Kowalczykowski, SC
通讯作者:
Kowalczykowski, SC
影响因子:
9.2
作者:
Paull, TT;Rogakou, EP;Bonner, WM
通讯作者:
Bonner, WM
影响因子:
3.5
作者:
Mohindra, A;Hays, LE;Meuth, M
通讯作者:
Meuth, M
影响因子:
11.4
作者:
Mazin, AV;Zaitseva, E;Kowalczykowski, SC
通讯作者:
Kowalczykowski, SC