ERN1

Gene Information
  • Official Symbol: ERN1
  • Official Name: endoplasmic reticulum to nucleus signaling 1
  • Aliases and Previous Symbols: N/A
  • Entrez ID: 2081
  • UniProt: O75460
  • Interactions: BioGRID
  • PubMed articles: Open PubMed
  • OMIM: Open OMIM
Function Summary
  • Entrez Summary: N/A
  • UniProt Summary: Serine/threonine-protein kinase and endoribonuclease that acts as a key sensor for the endoplasmic reticulum unfolded protein response (UPR) (PubMed:11779464, PubMed:11175748, PubMed:12637535, PubMed:9637683, PubMed:21317875). In unstressed cells, the endoplasmic reticulum luminal domain is maintained in its inactive monomeric state by binding to the endoplasmic reticulum chaperone HSPA5/BiP (PubMed:21317875). Accumulation of misfolded protein in the endoplasmic reticulum causes release of HSPA5/BiP, allowing the luminal domain to homodimerize, promoting autophosphorylation of the kinase domain and subsequent activation of the endoribonuclease activity (PubMed:21317875). The endoribonuclease activity is specific for XBP1 mRNA and excises 26 nucleotides from XBP1 mRNA (PubMed:11779464, PubMed:24508390, PubMed:21317875). The resulting spliced transcript of XBP1 encodes a transcriptional activator protein that up-regulates expression of UPR target genes (PubMed:11779464, PubMed:24508390, PubMed:21317875). {ECO:0000269|PubMed:11175748, ECO:0000269|PubMed:11779464, ECO:0000269|PubMed:12637535, ECO:0000269|PubMed:21317875, ECO:0000269|PubMed:9637683, ECO:0000305|PubMed:24508390}.

Pfam Domains GO Terms


CRISPR Data

Compound Hit Most Correlated Genes in Chemogenomics Tissues where Essential in the Avana Dataset (DepMap 20Q1)

Essentiality in NALM6
  • Essentiality Rank: 10653
  • Expression level (log2 read counts): 4.15

Expression Distribution

  • Last modified: 2025/12/10 20:19
  • by 127.0.0.1