Tchem HSPA5 Endoplasmic reticulum chaperone BiP

Protein Summary

Description

Endoplasmic reticulum chaperone that plays a key role in protein folding and quality control in the endoplasmic reticulum lumen (PubMed:2294010, PubMed:23769672, PubMed:23990668, PubMed:28332555). 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 (By similarity). Acts as a key repressor of the ERN1/IRE1-mediated unfolded protein response (UPR) (PubMed:1550958, PubMed:19538957). In the unstressed endoplasmic reticulum, recruited by DNAJB9/ERdj4 to the luminal region of ERN1/IRE1, leading to disrupt the dimerization of ERN1/IRE1, thereby inactivating ERN1/IRE1 (By similarity). Accumulation of misfolded protein in the endoplasmic reticulum causes release of HSPA5/BiP from ERN1/IRE1, allowing homodimerization and subsequent activation of ERN1/IRE1 (By similarity). Plays an auxiliary role in post-translational transport of small presecretory proteins across endoplasmic reticulum (ER). May function as an allosteric modulator for SEC61 channel-forming translocon complex, likely cooperating with SEC62 to enable the productive insertion of these precursors into SEC61 channel. Appears to specifically regulate translocation of precursors having inhibitory residues in their mature region that weaken channel gating. The protein encoded by this gene is a member of the heat shock protein 70 (HSP70) family. It is localized in the lumen of the endoplasmic reticulum (ER), and is involved in the folding and assembly of proteins in the ER. As this protein interacts with many ER proteins, it may play a key role in monitoring protein transport through the cell.[provided by RefSeq, Sep 2010]

Uniprot Accession IDs

• P11021
• B0QZ61
• Q2EF78
• Q9NPF1
• Q9UK02

Gene Name

• HSPA5

Ensembl ID

• ENST00000324460
• ENSP00000324173
• ENSG00000044574

Symbol

• GRP78
• BIP
• MIF2
• GRP78
• HEL-S-89n

Knowledge Table

Most Knowledge About	Knowledge Value (0 to 1 scale)
chemical	1
disease perturbation	1
hub protein	1
interacting protein	1
molecular function	1

Protein Classes

No PANTHER Classes or DTO Classes found

IDG Development Level Summary

Tdark

These are targets about which virtually nothing is known. They do not have known drug or small molecule activities
- AND - satisfy two or more of the following criteria:

Pubmed score: 2808.95   (req: < 5)

Gene RIFs: 537   (req: <= 3)

Antibodies: 1556   (req: <= 50)

Tbio

These targets do not have known drug or small molecule activities
- AND - satisfy two or more of the following criteria:

Pubmed score: 2808.95   (req: >= 5)

Gene RIFs: 537   (req: > 3)

Antibodies: 1556   (req: > 50)

- OR - satisfy the following criterion:

Gene Ontology Terms: 58

Tchem

Target has at least one ChEMBL compound with an activity cutoff of < 30 nM - AND - satisfies the preceding conditions

Active Ligands: 8

Tclin

Target has at least one approved drug - AND - satisfies the preceding conditions

Active Drug: 0