TFIIE orchestrates the recruitment of the TFIIH kinase module at promoter before release during transcription.
Fiche publication
Date publication
mai 2019
Journal
Nature communications
Auteurs
Membres identifiés du Cancéropôle Est :
Dr COIN Frédéric, Dr EGLY Jean-Marc, Dr COMPE Emmanuel
Tous les auteurs :
Compe E, Genes CM, Braun C, Coin F, Egly JM
Lien Pubmed
Résumé
In eukaryotes, the general transcription factors TFIIE and TFIIH assemble at the transcription start site with RNA Polymerase II. However, the mechanism by which these transcription factors incorporate the preinitiation complex and coordinate their action during RNA polymerase II transcription remains elusive. Here we show that the TFIIEα and TFIIEβ subunits anchor the TFIIH kinase module (CAK) within the preinitiation complex. In addition, we show that while RNA polymerase II phosphorylation and DNA opening occur, CAK and TFIIEα are released from the promoter. This dissociation is impeded by either ATP-γS or CDK7 inhibitor THZ1, but still occurs when XPB activity is abrogated. Finally, we show that the Core-TFIIH and TFIIEβ are subsequently removed, while elongation factors such as DSIF are recruited. Remarkably, these early transcriptional events are affected by TFIIE and TFIIH mutations associated with the developmental disorder, trichothiodystrophy.
Référence
Nat Commun. 2019 May 7;10(1):2084