Elongation factor ELOF1 drives transcription-coupled repair and prevents genome instability.

Elongation factor ELOF1 drives transcription-coupled repair and prevents genome instability.
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DOI:
10.1038/s41556-021-00692-z
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发表时间:
2021-06
影响因子:
21.3
通讯作者:
Marteijn JA
Marteijn JA
中科院分区:
生物学1区
文献类型:
--
作者:
Geijer ME;Zhou D;Selvam K;Steurer B;Mukherjee C;Evers B;Cugusi S;van Toorn M;van der Woude M;Janssens RC;Kok YP;Gong W;Raams A;Lo CSY;Lebbink JHG;Geverts B;Plummer DA;Bezstarosti K;Theil AF;Mitter R;Houtsmuller AB;Vermeulen W;Demmers JAA;Li S;van Vugt MATM;Lans H;Bernards R;Svejstrup JQ;Ray Chaudhuri A;Wyrick JJ;Marteijn JA

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正确的转录对生命至关重要。然而,DNA损伤严重阻碍了延伸RNA聚合酶II(POL II),导致转录抑制和转录-复制冲突。细胞配备了复杂的机制来抵消这些转录阻断损伤(TBL)的严重后果。然而,确切的机制和涉及的因素在很大程度上仍不清楚。在这里,使用全基因组CRISPR/Cas9筛选,我们发现延伸因子ELOF1是DNA损伤时转录应激反应中的一个重要因子。我们发现ELOF1在转录偶联核苷酸切除修复(TC-NER)中具有进化保守的作用,它促进TC-NER因子UVSSA和TFIIH的招募,以有效修复TBL并恢复转录。此外,ELOF1调节转录以保护细胞免受转录介导的复制压力,从而保持基因组的稳定性。因此,ELOF1通过两种不同的机制保护转录机制免受DNA损伤。
Correct transcription is crucial for life. However, DNA damage severely impedes elongating RNA Polymerase II (Pol II), causing transcription inhibition and transcription-replication conflicts. Cells are equipped with intricate mechanisms to counteract the severe consequence of these transcription-blocking lesions (TBLs). However, the exact mechanism and factors involved remain largely unknown. Here, using a genome-wide CRISPR/cas9 screen, we identified elongation factor ELOF1 as an important factor in the transcription stress response upon DNA damage. We show that ELOF1 has an evolutionary conserved role in Transcription-Coupled Nucleotide Excision Repair (TC-NER), where it promotes recruitment of the TC-NER factors UVSSA and TFIIH to efficiently repair TBLs and resume transcription. Additionally, ELOF1 modulates transcription to protect cells from transcription-mediated replication stress, thereby preserving genome stability. Thus, ELOF1 protects the transcription machinery from DNA damage via two distinct mechanisms.
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