Transcription regulation of CDKN1A (p21/CIP1/WAF1) by TRF2 is epigenetically controlled through the REST repressor complex.

Transcription regulation of CDKN1A (p21/CIP1/WAF1) by TRF2 is epigenetically controlled through the REST repressor complex.
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DOI:
10.1038/s41598-017-11177-1
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发表时间:
2017-09-14
期刊:
影响因子:
4.6
通讯作者:
Chowdhury S
Chowdhury S
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Hussain T;Saha D;Purohit G;Kar A;Kishore Mukherjee A;Sharma S;Sengupta S;Dhapola P;Maji B;Vedagopuram S;Horikoshi NT;Horikoshi N;Pandita RK;Bhattacharya S;Bajaj A;Riou JF;Pandita TK;Chowdhury S

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我们观察到端粒重复序列结合因子TRF2与细胞周期蛋白依赖性激酶CDKNIA(p21/CIP1/WAF1)启动子的端粒外结合。这导致TRF2诱导了p21的转录抑制。有趣的是,p21的抑制是通过Rest-corest-LSD1-repressor复合体的结合和以TRF2依赖的方式改变p21启动子上的组蛋白标记来实现的。此外,突变分析表明,p21抑制需要TRF2与p21启动子G-四链相互作用。在生理上,TRF2介导的p21抑制通过逃避癌细胞中的G2/M期阻滞来减弱药物诱导的细胞DNA损伤反应的激活。综上所述,这些首次揭示了TRF2在静息-抑制复合体介导的转录抑制中的作用。
We observed extra-telomeric binding of the telomere repeat binding factor TRF2 within the promoter of the cyclin-dependent kinase CDKNIA (p21/CIP1/WAF1). This result in TRF2 induced transcription repression of p21. Interestingly, p21 repression was through engagement of the REST-coREST-LSD1-repressor complex and altered histone marks at the p21 promoter in a TRF2-dependent fashion. Furthermore, mutational analysis shows p21 repression requires interaction of TRF2 with a p21 promoter G-quadruplex. Physiologically, TRF2-mediated p21 repression attenuated drug-induced activation of cellular DNA damage response by evading G2/M arrest in cancer cells. Together these reveal for the first time role of TRF2 in REST- repressor complex mediated transcription repression.
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