The E2F1 transcription factor and RB tumor suppressor moonlight as DNA repair factors.

The E2F1 transcription factor and RB tumor suppressor moonlight as DNA repair factors.
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DOI:
10.1080/15384101.2020.1801190
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发表时间:
2020-09
期刊:
Cell cycle (Georgetown, Tex.)
影响因子:
--
通讯作者:
Johnson DG
Johnson DG
中科院分区:
其他
文献类型:
--
作者:
Manickavinayaham S;Velez-Cruz R;Biswas AK;Chen J;Guo R;Johnson DG

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众所周知,E2F1转录因子和RB肿瘤抑制因子在调节细胞周期进程中重要基因的表达方面发挥着重要作用,但它们也具有转录不依赖的功能,促进损伤部位的DNA修复。根据DNA损伤的类型,E2F1可以招募GCN5或p300/CBP组蛋白乙酰化转移酶在侧翼染色质上沉积不同的组蛋白乙酰化标记。在DNA双链断裂时,E2F1还招募RB和BRG1 atp酶来重塑染色质并促进MRE11-RAD50-NBS1复合体的装载。敲入小鼠模型证明了E2F1翻译后修饰在调节DNA修复和DNA损伤生理反应中的重要作用。这篇综述强调了E2F1是如何在DNA修复中发挥作用的,从而揭示了E2F1是一种多功能蛋白,它可以招募许多相同的染色质修饰酶到DNA损伤位点来促进修复,就像它招募到基因启动子来调节转录一样。
The E2F1 transcription factor and RB tumor suppressor are best known for their roles in regulating the expression of genes important for cell cycle progression but, they also have transcription-independent functions that facilitate DNA repair at sites of damage. Depending on the type of DNA damage, E2F1 can recruit either the GCN5 or p300/CBP histone acetyltransferases to deposit different histone acetylation marks in flanking chromatin. At DNA double-strand breaks, E2F1 also recruits RB and the BRG1 ATPase to remodel chromatin and promote loading of the MRE11-RAD50-NBS1 complex. Knock-in mouse models demonstrate important roles for E2F1 post-translational modifications in regulating DNA repair and physiological responses to DNA damage. This review highlights how E2F1 moonlights in DNA repair, thus revealing E2F1 as a versatile protein that recruits many of the same chromatin-modifying enzymes to sites of DNA damage to promote repair that it recruits to gene promoters to regulate transcription.
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