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HSPA5 (Endoplasmic reticulum chaperone BiP) is an enzyme. The public catalogues list it as a drug target and a biomarker, and clinical evidence ties its variants to diagnosis, prognosis or drug response. Tied to Colorectal cancer. This dossier gathers the 0 products (0 approved), 0 trials, 0 pathways and 0 resistance routes in the corpus that involve it, with external identifiers so it can be joined to UniProt, ChEMBL, Open Targets and the rest of biology.

Biology

Endoplasmic reticulum chaperone that plays a key role in protein folding and quality control in the endoplasmic reticulum lumen. Involved in the correct folding of proteins and degradation of misfolded proteins via its interaction with DNAJC10/ERdj5, probably to facilitate the release of DNAJC10/ERdj5 from its substrate. Acts as a key repressor of the EIF2AK3/PERK and ERN1/IRE1-mediated unfolded protein response (UPR). In the unstressed endoplasmic reticulum, recruited by DNAJB9/ERdj4 to the luminal region of ERN1/IRE1, leading to disrupt the dimerisation of ERN1/IRE1, thereby inactivating ERN1/IRE1. Also binds and inactivates EIF2AK3/PERK in unstressed cells. Accumulation of misfolded protein in the endoplasmic reticulum causes release of HSPA5/BiP from ERN1/IRE1 and EIF2AK3/PERK, allowing their homodimerisation and subsequent activation. Location: Endoplasmic reticulum lumen; Melanosome; Cytoplasm; Cell surface (UniProt). Locus 9q33.3 (HGNC).

Where it is found
  • Colorectal cancer: CIViC evidence names this disease
Class: enzyme · Gene: HSPA5 · Facts checked 2026-09-23 · Target page

External identifiers

Built from HGNC, Ensembl, UniProt and ChEMBL ids

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Resistance routes

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Companion diagnostics

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Preclinical models

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Literature

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Query for this target: (TITLE:"HSPA5" OR ABSTRACT:"HSPA5" OR TITLE:"heat shock protein family A Hsp70 member 5" OR ABSTRACT:"heat shock protein family A Hsp70 member 5" OR TITLE:"Endoplasmic reticulum chaperone BiP" OR ABSTRACT:"Endoplasmic reticulum chaperone BiP" OR TITLE:"BiP" OR ABSTRACT:"BiP" OR TITLE:"GRP78" OR ABSTRACT:"GRP78") AND (cancer OR tumor OR tumour OR oncology OR carcinoma OR lymphoma OR leukemia OR leukaemia OR myeloma OR sarcoma OR melanoma OR glioma). Results are unfiltered search hits about HSPA5, not a curated reading list.

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The dossier as machine-readable JSON: identifiers from HGNC, Ensembl, UniProt and ChEMBL, products with status, trials, pathways, hotspots, open questions and assays. The full entity record is in the open API at /api/v1/entities/hspa5.json. Licence CC BY-NC 4.0.