BRCA1 and CtIP suppress long-tract gene conversion between sister chromatids.
BRCA1 and CtIP suppress long-tract gene conversion between sister chromatids.
复制标题
DOI:
10.1038/ncomms3404
复制
发表时间:
2013
影响因子:
16.6
通讯作者:
Scully, Ralph
中科院分区:
文献类型:
--
作者:
Chandramouly, Gurushankar;Kwok, Amy;Huang, Bin;Willis, Nicholas A.;Xie, Anyong;Scully, Ralph
BRCA1 controls early steps of the synthesis-dependent strand annealing (SDSA) pathway of homologous recombination, but has no known role following Rad51-mediated synapsis. Here we show that BRCA1 influences post-synaptic homologous recombination events, controlling the balance between short- (STGC) and long-tract gene conversion (LTGC) between sister chromatids. Brca1 mutant cells reveal a bias towards LTGC that is corrected by expression of wild type but not cancer-predisposing BRCA1 alleles. The LTGC bias is enhanced by depletion of CtIP but reversed by inhibition of 53BP1, implicating DNA end resection as a contributor to the STGC/LTGC balance. The impact of BRCA1/CtIP loss on the STGC/LTGC balance is abolished when the second (non-invading) end of the break is unable to support termination of STGC by homologous pairing (“annealing”). This suggests that BRCA1/CtIP-mediated processing of the second end of the break controls the annealing step that normally terminates SDSA, thereby suppressing the error-prone LTGC outcome.
登录
查看更多内容
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:
--
DOI:
10.1073/pnas.151008198
发表时间:
2001-07-17
影响因子:
11.1
作者:
Kraus, E;Leung, WY;Haber, JE
通讯作者:
Haber, JE
影响因子:
5.3
作者:
Elliott, B;Richardson, C;Jasin, M
通讯作者:
Jasin, M
影响因子:
16
作者:
Ciccia A;Elledge SJ
通讯作者:
Elledge SJ
DOI:
10.1042/bj20090942
发表时间:
2009-09-25
期刊:
The Biochemical journal
影响因子:
--
作者:
Hartlerode AJ;Scully R
通讯作者:
Scully R