生物
抄写(语言学)
转录因子
分子生物学
染色质
聚合酶
一般转录因子
作者
Yana van der Weegen,Klaas de Lint,Diana van den Heuvel,Yuka Nakazawa,Tycho E. T. Mevissen,Janne J. M. van Schie,Marta San Martin Alonso,Daphne E. C. Boer,Román González-Prieto,Ishwarya Venkata Narayanan,Noud H. M. Klaassen,Annelotte P. Wondergem,Khashayar Roohollahi,Josephine C. Dorsman,Yuichiro Hara,Alfred C.O. Vertegaal,Job de Lange,Johannes C. Walter,Sylvie M. Noordermeer,Mats Ljungman,Tomoo Ogi,Rob M. F. Wolthuis,Martijn S. Luijsterburg
标识
DOI:10.1038/s41556-021-00688-9
摘要
Two side-by-side papers report that the transcription elongation factor ELOF1 drives transcription-coupled repair and prevents replication stress.Cells employ transcription-coupled repair (TCR) to eliminate transcription-blocking DNA lesions. DNA damage-induced binding of the TCR-specific repair factor CSB to RNA polymerase II (RNAPII) triggers RNAPII ubiquitylation of a single lysine (K1268) by the CRL4(CSA) ubiquitin ligase. How CRL4(CSA) is specifically directed towards K1268 is unknown. Here, we identify ELOF1 as the missing link that facilitates RNAPII ubiquitylation, a key signal for the assembly of downstream repair factors. This function requires its constitutive interaction with RNAPII close to K1268, revealing ELOF1 as a specificity factor that binds and positions CRL4(CSA) for optimal RNAPII ubiquitylation. Drug-genetic interaction screening also revealed a CSB-independent pathway in which ELOF1 prevents R-loops in active genes and protects cells against DNA replication stress. Our study offers key insights into the molecular mechanisms of TCR and provides a genetic framework of the interplay between transcriptional stress responses and DNA replication.
科研通智能强力驱动
Strongly Powered by AbleSci AI