In TFIIH the Arch domain of XPD is mechanistically essential for transcription and DNA repair. - Archive ouverte HAL Access content directly
Journal Articles Nature Communications Year : 2020

In TFIIH the Arch domain of XPD is mechanistically essential for transcription and DNA repair.

Stefan Peissert
  • Function : Author
Florian Sauer
  • Function : Author
Daniel B Grabarczyk
  • Function : Author
Cathy Braun
  • Function : Author
Gudrun Sander
  • Function : Author
Jean-Marc Egly
  • Function : Author
  • PersonId : 865235
Jochen Kuper
  • Function : Author
  • PersonId : 1082941
Caroline Kisker
  • Function : Author
  • PersonId : 1082942

Abstract

The XPD helicase is a central component of the general transcription factor TFIIH which plays major roles in transcription and nucleotide excision repair (NER). Here we present the high-resolution crystal structure of the Arch domain of XPD with its interaction partner MAT1, a central component of the CDK activating kinase complex. The analysis of the interface led to the identification of amino acid residues that are crucial for the MAT1-XPD interaction. More importantly, mutagenesis of the Arch domain revealed that these residues are essential for the regulation of (i) NER activity by either impairing XPD helicase activity or the interaction of XPD with XPG; (ii) the phosphorylation of the RNA polymerase II and RNA synthesis. Our results reveal how MAT1 shields these functionally important residues thereby providing insights into how XPD is regulated by MAT1 and defining the Arch domain as a major mechanistic player within the XPD scaffold.
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Dates and versions

hal-03024711 , version 1 (25-11-2020)

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Stefan Peissert, Florian Sauer, Daniel B Grabarczyk, Cathy Braun, Gudrun Sander, et al.. In TFIIH the Arch domain of XPD is mechanistically essential for transcription and DNA repair.. Nature Communications, 2020, 11 (1), pp.1667. ⟨10.1038/s41467-020-15241-9⟩. ⟨hal-03024711⟩
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