Transcription-Replication Conflict Orientation Modulates R-Loop Levels and Activates Distinct DNA Damage Responses.
Transcription-Replication Conflict Orientation Modulates R-Loop Levels and Activates Distinct DNA Damage Responses.
复制标题
转录复制冲突取向调节R环水平并激活不同的DNA损伤反应。
DOI:
10.1016/j.cell.2017.07.043
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发表时间:
2017-08-10
期刊:
影响因子:
64.5
通讯作者:
Cimprich KA
中科院分区:
文献类型:
--
作者:
Hamperl S;Bocek MJ;Saldivar JC;Swigut T;Cimprich KA
Conflicts between transcription and replication are a potent source of DNA damage. Co-transcriptional R-loops could aggravate such conflicts by creating an additional barrier to replication fork progression. Here, we use a defined episomal system to investigate how conflict orientation and R-loop formation influence genome stability in human cells. R-loops, but not normal transcription complexes, induce DNA breaks and orientation-specific DNA damage responses during conflicts with replication forks. Unexpectedly, the replisome acts as an orientation-dependent regulator of R-loop levels, reducing R-loops in the co-directional (CD) orientation but promoting their formation in the head-on (HO) orientation. Replication stress and deregulated origin firing increase the number of HO collisions leading to genome-destabilizing R-loops. Our findings connect DNA replication to R-loop homeostasis and suggest a mechanistic basis for genome instability resulting from deregulated DNA replication, observed in cancer and other disease states.
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影响因子:
64.8
作者:
Bartkova, Jirina;Rezaei, Nousin;Gorgoulis, Vassilis G.
通讯作者:
Gorgoulis, Vassilis G.
DOI:
10.1093/bioinformatics/btu638
发表时间:
2015-01-15
期刊:
Bioinformatics (Oxford, England)
影响因子:
--
作者:
Anders S;Pyl PT;Huber W
通讯作者:
Huber W
影响因子:
64.5
作者:
Barlow JH;Faryabi RB;Callén E;Wong N;Malhowski A;Chen HT;Gutierrez-Cruz G;Sun HW;McKinnon P;Wright G;Casellas R;Robbiani DF;Staudt L;Fernandez-Capetillo O;Nussenzweig A
通讯作者:
Nussenzweig A
影响因子:
16
作者:
Ginno PA;Lott PL;Christensen HC;Korf I;Chédin F
通讯作者:
Chédin F
影响因子:
7
作者:
Ginno PA;Lim YW;Lott PL;Korf I;Chédin F
通讯作者:
Chédin F