The interaction between CtIP and BRCA1 is not essential for resection-mediated DNA repair or tumor suppression.
The interaction between CtIP and BRCA1 is not essential for resection-mediated DNA repair or tumor suppression.
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DOI:
10.1083/jcb.201302145
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发表时间:
2013-05-27
期刊:
影响因子:
--
通讯作者:
Baer R
中科院分区:
文献类型:
--
作者:
Reczek CR;Szabolcs M;Stark JM;Ludwig T;Baer R
In mammalian cells, the phospho-dependent interaction between BRCA1 and CtIP is not required for homology-directed DNA repair or tumor suppression. The CtIP protein facilitates homology-directed repair (HDR) of double-strand DNA breaks (DSBs) by initiating DNA resection, a process in which DSB ends are converted into 3′-ssDNA overhangs. The BRCA1 tumor suppressor, which interacts with CtIP in a phospho-dependent manner, has also been implicated in DSB repair through the HDR pathway. It was recently reported that the BRCA1–CtIP interaction is essential for HDR in chicken DT40 cells. To examine the role of this interaction in mammalian cells, we generated cells and mice that express Ctip polypeptides (Ctip-S326A) that fail to bind BRCA1. Surprisingly, isogenic lines of Ctip-S326A mutant and wild-type cells displayed comparable levels of HDR function and chromosomal stability. Although Ctip-S326A mutant cells were modestly sensitive to topoisomerase inhibitors, mice expressing Ctip-S326A polypeptides developed normally and did not exhibit a predisposition to cancer. Thus, in mammals, the phospho-dependent BRCA1–CtIP interaction is not essential for HDR-mediated DSB repair or for tumor suppression.
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DOI:
10.1016/j.tig.2008.08.007
发表时间:
2008-11
期刊:
Trends in genetics : TIG
影响因子:
--
作者:
McVey M;Lee SE
通讯作者:
Lee SE
影响因子:
16.8
作者:
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通讯作者:
Chen, Junjie
影响因子:
11.4
作者:
Penkner, Alexandra;Portik-Dobos, Zsuzsanna;Loidl, Josef
通讯作者:
Loidl, Josef
影响因子:
16
作者:
Escribano-Diaz, Cristina;Orthwein, Alexandre;Durocher, Daniel
通讯作者:
Durocher, Daniel
DOI:
10.1038/nrm2831
发表时间:
2010-02
期刊:
Nature reviews. Molecular cell biology
影响因子:
--
作者:
通讯作者:
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