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首页> 外文期刊>Cell cycle >E2F1: A new role in the DNA damage response.
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E2F1: A new role in the DNA damage response.

机译:E2F1:在DNA损伤反应中的新作用。

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摘要

The E2F1 transcription factor plays a multifac-eted role in cell proliferation and survival and can alternatively behave as tumor suppressor gene or an oncogene, depending on biological context. E2F1's role as a tumor suppressor can be explained by its ability to induce apoptosis; however, at least three emerging lines of evidence suggest that E2F1 may have a role in maintaining genomic integrity through direct participation in the DNA damage response. Firstly, E2F1 is regulated by multiple DNA damage-induced signaling cascades. For one example, ATM can phosphorylate E2F1 on Ser 31 in response to ionizing radiation (IR), leading to E2F1 protein stabilization. Secondly, recent work has shown that E2F1 deficiency can impair various DNA damage response processes, such as nucleotide excision repair. Finally, E2F1 is found physically associated with DNA regions undergoing repair, which is consistent with a direct role in the assembly of DNA repair complexes.
机译:E2F1转录因子在细胞增殖和存活中起着多方面的作用,根据生物学环境,它也可以充当抑癌基因或癌基因。 E2F1作为肿瘤抑制因子的作用可以通过其诱导凋亡的能力来解释。然而,至少有三项新兴证据表明,E2F1可能通过直接参与DNA损伤反应来维持基因组完整性。首先,E2F1受多个DNA损伤诱导的信号级联反应的调控。例如,ATM可以响应电离辐射(IR)使Ser 31上的E2F1磷酸化,从而导致E2F1蛋白稳定。其次,最近的工作表明,E2F1缺乏会削弱各种DNA损伤反应过程,例如核苷酸切除修复。最后,发现E2F1与经历修复的DNA区域在物理上相关,这与DNA修复复合体组装中的直接作用一致。

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