DNA repair factor RAD18 and DNA polymerase Polκ confer tolerance of oncogenic DNA replication stress.
DNA repair factor RAD18 and DNA polymerase Polκ confer tolerance of oncogenic DNA replication stress.
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DOI:
10.1083/jcb.201702006
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发表时间:
2017-10-02
期刊:
影响因子:
--
通讯作者:
Vaziri C
中科院分区:
文献类型:
--
作者:
Yang Y;Gao Y;Mutter-Rottmayer L;Zlatanou A;Durando M;Ding W;Wyatt D;Ramsden D;Tanoue Y;Tateishi S;Vaziri C
The elevated CDK2 activity of oncogene-expressing cells induces DNA replication stress. Yang et al. show that the DNA repair protein RAD18 facilitates damage-tolerant DNA synthesis via the DNA polymerase κ in cells with aberrantly high CDK2 activity, suggesting an important new role for RAD18 in sustaining neoplastic cell survival. The mechanisms by which neoplastic cells tolerate oncogene-induced DNA replication stress are poorly understood. Cyclin-dependent kinase 2 (CDK2) is a major mediator of oncogenic DNA replication stress. In this study, we show that CDK2-inducing stimuli (including Cyclin E overexpression, oncogenic RAS, and WEE1 inhibition) activate the DNA repair protein RAD18. CDK2-induced RAD18 activation required initiation of DNA synthesis and was repressed by p53. RAD18 and its effector, DNA polymerase κ (Polκ), sustained ongoing DNA synthesis in cells harboring elevated CDK2 activity. RAD18-deficient cells aberrantly accumulated single-stranded DNA (ssDNA) after CDK2 activation. In RAD18-depleted cells, the G2/M checkpoint was necessary to prevent mitotic entry with persistent ssDNA. Rad18−/− and Polκ−/− cells were highly sensitive to the WEE1 inhibitor MK-1775 (which simultaneously activates CDK2 and abrogates the G2/M checkpoint). Collectively, our results show that the RAD18–Polκ signaling axis allows tolerance of CDK2-mediated oncogenic stress and may allow neoplastic cells to breach tumorigenic barriers.
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DOI:
10.1083/jcb.200905059
发表时间:
2010-03-08
期刊:
The Journal of cell biology
影响因子:
--
作者:
Beck H;Nähse V;Larsen MS;Groth P;Clancy T;Lees M;Jørgensen M;Helleday T;Syljuåsen RG;Sørensen CS
通讯作者:
Sørensen CS
影响因子:
64.8
作者:
Bartkova, Jirina;Rezaei, Nousin;Gorgoulis, Vassilis G.
通讯作者:
Gorgoulis, Vassilis G.
影响因子:
64.8
作者:
Di Micco, Raffaella;Fumagalli, Marzia;di Fagagna, Fabrizio d'Adda
通讯作者:
di Fagagna, Fabrizio d'Adda
影响因子:
3.7
作者:
Guzmán C;Bagga M;Kaur A;Westermarck J;Abankwa D
通讯作者:
Abankwa D
影响因子:
8.8
作者:
Garcia-Exposito L;Bournique E;Bergoglio V;Bose A;Barroso-Gonzalez J;Zhang S;Roncaioli JL;Lee M;Wallace CT;Watkins SC;Opresko PL;Hoffmann JS;O'Sullivan RJ
通讯作者:
O'Sullivan RJ