2. Academic Validation
  3. QRICH1 dictates the outcome of ER stress through transcriptional control of proteostasis

QRICH1 dictates the outcome of ER stress through transcriptional control of proteostasis

  • Science. 2021 Jan 1;371(6524):eabb6896. doi: 10.1126/science.abb6896.
Kwontae You 1,  Lingfei Wang 1,  Chih-Hung Chou 1,  Kai Liu 2 3,  Toru Nakata 2 3,  Alok Jaiswal 1,  Junmei Yao 2 3,  Ariel Lefkovith 1,  Abdifatah Omar 2 3,  Jacqueline G Perrigoue 4,  Jennifer E Towne 4,  Aviv Regev 5 6,  Daniel B Graham 7 2 3,  Ramnik J Xavier 7 2 3
Affiliations

Affiliations

  • 1 Broad Institute of MIT and Harvard, Cambridge, MA, USA.
  • 2 Department of Molecular Biology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA.
  • 3 Center for Computational and Integrative Biology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA.
  • 4 Janssen Research and Development, LLC, Spring House, PA, USA.
  • 5 Klarman Cell Observatory, Broad Institute, Cambridge, MA, USA. [email protected] [email protected] [email protected].
  • 6 Howard Hughes Medical Institute, Department of Biology, MIT, Cambridge, MA, USA.
  • 7 Broad Institute of MIT and Harvard, Cambridge, MA, USA. [email protected] [email protected] [email protected].
PMID: 33384352 DOI: 10.1126/science.abb6896
Abstract

Tissue homeostasis is perturbed in a diversity of inflammatory pathologies. These changes can elicit endoplasmic reticulum (ER) stress, protein misfolding, and cell death. ER stress triggers the unfolded protein response (UPR), which can promote recovery of ER proteostasis and cell survival or trigger programmed cell death. Here, we leveraged single-cell RNA sequencing to define dynamic transcriptional states associated with the adaptive versus terminal UPR in the mouse intestinal epithelium. We integrated these transcriptional programs with genome-scale CRISPR screening to dissect the UPR pathway functionally. We identified QRICH1 as a key effector of the PERK-eIF2α axis of the UPR. QRICH1 controlled a transcriptional program associated with translation and secretory networks that were specifically up-regulated in inflammatory pathologies. Thus, QRICH1 dictates cell fate in response to pathological ER stress.

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