Elongin functions as a loading factor for Mediator at ATF6α-regulated ER stress response genes

Yanfeng He, Shigeo Sato, Chieri Tomomori-Sato, Shiyuan Chen, Zach H. Goode, Joan W. Conaway, Ronald C. Conaway

Research output: Contribution to journalArticlepeer-review

Abstract

The bZIP transcription factor ATF6α is a master regulator of endoplasmic reticulum (ER) stress response genes. In this report, we identify the multifunctional RNA polymerase II transcription factor Elongin as a cofactor for ATF6α-dependent transcription activation. Biochemical studies reveal that Elongin functions at least in part by facilitating ATF6α-dependent loading of Mediator at the promoters and enhancers of ER stress response genes. Depletion of Elongin from cells leads to impaired transcription of ER stress response genes and to defects in the recruitment of Mediator and its CDK8 kinase subunit. Taken together, these findings bring to light a role for Elongin as a loading factor for Mediator during the ER stress response.

Original languageEnglish (US)
Article numbere2108751118
JournalProceedings of the National Academy of Sciences of the United States of America
Volume118
Issue number39
DOIs
StatePublished - Sep 28 2021
Externally publishedYes

Keywords

  • Enhancer
  • Mediator
  • RNA polymerase II
  • Transcription

ASJC Scopus subject areas

  • General

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