Summary

Name HSPA5
Full Name Endoplasmic reticulum chaperone BiP
Synonyms GRP-78, Endoplasmic reticulum lumenal Ca(2+)-binding protein grp78, Heat shock 70 kDa protein 5, Immunoglobulin heavy chain-binding protein, BiP | GRP78
Primary ID P11021
Links - -
Type protein
Relations 20
Pathways COVID-19 Causal Network, SARS-CoV ER STRESS
Function 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. May also play a role in apoptosis and cell proliferation (PubMed:26045166).

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Relations

Regulator Mechanism target score
+ down-regulates quantity by repression img/indirect_inhibition.png transcriptional regulation HSPA5 0.2
Publications: 1 Organism: Homo Sapiens
+ down-regulates img/indirect_inhibition.png HSPA5 0.7
Publications: 1 Organism: Homo Sapiens
Pathways:COVID-19 Causal Network, SARS-CoV ER STRESS
+ down-regulates quantity by repression img/indirect_inhibition.png transcriptional regulation HSPA5 0.264
Publications: 1 Organism: Homo Sapiens
+ up-regulates activity img/direct-activation.png binding HSPA5 0.558
Publications: 1 Organism: In Vitro
+ up-regulates img/indirect-activation.png UPR 0.7
Publications: 1
+ up-regulates activity img/direct-activation.png binding HSPA5 0.595
Publications: 1 Organism: Chlorocebus Aethiops
+ up-regulates quantity by expression img/indirect-activation.png transcriptional regulation HSPA5 0.381
Publications: 1 Organism: Homo Sapiens
+ up-regulates quantity by expression img/indirect-activation.png transcriptional regulation HSPA5 0.309
Publications: 1 Organism: Homo Sapiens
+ down-regulates quantity by repression img/indirect_inhibition.png transcriptional regulation HSPA5 0.655
Publications: 1 Organism: Homo Sapiens
Pathways:COVID-19 Causal Network, SARS-CoV ER STRESS
+ up-regulates quantity by stabilization img/direct-activation.png relocalization HSPA5 0.423
Publications: 1 Organism: Homo Sapiens
+ up-regulates quantity by expression img/indirect-activation.png transcriptional regulation HSPA5 0.2
Publications: 1 Organism: Homo Sapiens
Pathways:COVID-19 Causal Network, SARS-CoV ER STRESS
+ up-regulates quantity by expression img/direct-activation.png transcriptional regulation HSPA5 0.46
Publications: 1 Organism: Homo Sapiens
+ up-regulates quantity by expression img/direct-activation.png transcriptional regulation HSPA5 0.816
Publications: 1 Organism: Homo Sapiens
Pathways:COVID-19 Causal Network, SARS-CoV ER STRESS
+ down-regulates activity img/direct_inhibition.png binding ERN1 0.815
Publications: 1 Organism: Homo Sapiens
Pathways:COVID-19 Causal Network, SARS-CoV ER STRESS
+ down-regulates quantity by destabilization img/direct_inhibition.png post transcriptional regulation HSPA5 0.3
Publications: 1 Organism: Homo Sapiens
+ up-regulates img/indirect-activation.png Chaperone-mediated protein folding 0.7
Publications: 1
+ down-regulates activity img/direct_inhibition.png binding EIF2AK3 0.715
Publications: 1 Organism: Homo Sapiens
Pathways:COVID-19 Causal Network, SARS-CoV ER STRESS
+ down-regulates quantity by repression img/indirect_inhibition.png transcriptional regulation HSPA5 0.2
Publications: 1 Organism: Homo Sapiens
+ up-regulates activity img/direct-activation.png binding HSPA5 0.46
Publications: 1
+ down-regulates activity img/direct_inhibition.png binding ATF6 0.816
Publications: 1 Organism: Homo Sapiens
Pathways:COVID-19 Causal Network, SARS-CoV ER STRESS