GRP78 BiP è un gene codificato dal simbolo HSPA5. Comunemente indicato anche come: Endoplasmic reticulum chaperone BiP; 78 kDa glucose-regulated protein; GRP-78; Binding-immunoglobulin protein; BiP; Heat shock protein 70 family protein 5; HSP70 family protein 5; Heat shock protein family A member 5; Immunoglobulin heavy chain-binding protein; HSPA5; GRP78. GRP78 BiP ha una massa di 72.33kDa e una lunghezza di amminoacidi di 654.
Offriamo 22 anticorpi contro GRP78 BiP, allevati nel Coniglio, Topo e Capra, che sono adatti per WB, IHC, ELISA, ICC/IF e IP con campioni derivati da Umano, Topo, Ratto, Bovino, Coniglio, Scimmia, Cane, Drosofila, Criceto e Xenopus.
Informazioni su geni e proteine
Riepilogo UniProt
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.
Sommario di Entrez
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.
Somiglianze di sequenza
Belongs to the heat shock protein 70 family.
Modifica post-translazionale
AMPylated by FICD (PubMed:25601083). In unstressed cells, AMPylation at Thr-518 by FICD inactivates the chaperome activity: AMPylated form is locked in a relatively inert state and only weakly stimulated by J domain-containing proteins (By similarity). In response to endoplasmic reticulum stress, de-AMPylation by the same protein, FICD, restores the chaperone activity (By similarity).
Posizione cellulare
Endoplasmic reticulum lumen. Melanosome. Cytoplasm.
Identified by mass spectrometry in melanosome fractions from stage I to stage IV.
