Mechanism of tandem duplication formation in BRCA1-mutant cells.
Mechanism of tandem duplication formation in BRCA1-mutant cells.
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DOI:
10.1038/nature24477
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发表时间:
2017-11-30
期刊:
影响因子:
64.8
通讯作者:
Scully R
中科院分区:
文献类型:
--
作者:
Willis NA;Frock RL;Menghi F;Duffey EE;Panday A;Camacho V;Hasty EP;Liu ET;Alt FW;Scully R
Small ~10 kb microhomology-mediated tandem duplications (“Group 1 TDs”) are abundant in BRCA1-linked but not BRCA2-linked breast cancer genomes. Here, we define the mechanism underlying this “rearrangement signature”. We show that BRCA1, but not BRCA2, suppresses TDs at a Tus/Ter site-specific chromosomal replication fork barrier in primary mammalian cells. BRCA1 has no equivalent role at chromosomal double strand breaks, indicating specificity for the stalled fork response. Tandem duplications in BRCA1 mutant cells arise by a “replication restart-bypass” mechanism terminated by end joining or by microhomology-mediated template switching, the latter forming complex TD breakpoints. We show that solitary DNA ends form directly at Tus/Ter, implicating misrepair of these lesions in TD formation. We find that BRCA1 inactivation is strongly associated with Group 1 TDs in ovarian cancer. The Group 1 TD phenotype may be a general signature of BRCA1-deficient cancer.
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影响因子:
16
作者:
Long, David T.;Joukov, Vladimir;Budzowska, Magda;Walter, Johannes C.
通讯作者:
Walter, Johannes C.
DOI:
10.1126/science.aaa8391
发表时间:
2015-08-14
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Mayle R;Campbell IM;Beck CR;Yu Y;Wilson M;Shaw CA;Bjergbaek L;Lupski JR;Ira G
通讯作者:
Ira G
影响因子:
14.8
作者:
Hu J;Meyers RM;Dong J;Panchakshari RA;Alt FW;Frock RL
通讯作者:
Frock RL
DOI:
10.1056/nejmra0809889
发表时间:
2010-05-20
期刊:
The New England journal of medicine
影响因子:
--
作者:
D'Andrea AD
通讯作者:
D'Andrea AD
影响因子:
4.5
作者:
Hartlerode AJ;Willis NA;Rajendran A;Manis JP;Scully R
通讯作者:
Scully R