TARGETID

T77594

FORMERID

TTDI02087

UNIPROID

BIP_HUMAN

TARGNAME

Endoplasmic reticulum chaperone BiP (HSPA5)

GENENAME

HSPA5

TARGTYPE

Clinical trial target

SYNONYMS

Immunoglobulin heavy chainbinding protein; Immunoglobulin heavy chain-binding protein; Heat shock protein family A member 5; Heat shock protein 70 family protein 5; Heat shock 70 kDa protein 5; HSP70 family protein 5; GRP78; GRP-78; Endoplasmic reticulum lumenal Ca(2+)binding protein grp78; Binding-immunoglobulin protein; BiP; 78 kDa glucose-regulated protein

FUNCTION

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 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 dimerization of ERN1/IRE1, thereby inactivating ERN1/IRE1. Accumulation of misfolded protein in the endoplasmic reticulum causes release of HSPA5/BiP from ERN1/IRE1, allowing homodimerization and subsequent activation of ERN1/IRE1. 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. Endoplasmic reticulum chaperone that plays a key role in protein folding and quality control in the endoplasmic reticulum lumen.

PDBSTRUC

6DFO; 6DFM; 6CZ1; 6ASY; 5F2R

BIOCLASS

Acid anhydride hydrolase

ECNUMBER

EC 3.6.4.10

SEQUENCE

MKLSLVAAMLLLLSAARAEEEDKKEDVGTVVGIDLGTTYSCVGVFKNGRVEIIANDQGNRITPSYVAFTPEGERLIGDAAKNQLTSNPENTVFDAKRLIGRTWNDPSVQQDIKFLPFKVVEKKTKPYIQVDIGGGQTKTFAPEEISAMVLTKMKETAEAYLGKKVTHAVVTVPAYFNDAQRQATKDAGTIAGLNVMRIINEPTAAAIAYGLDKREGEKNILVFDLGGGTFDVSLLTIDNGVFEVVATNGDTHLGGEDFDQRVMEHFIKLYKKKTGKDVRKDNRAVQKLRREVEKAKRALSSQHQARIEIESFYEGEDFSETLTRAKFEELNMDLFRSTMKPVQKVLEDSDLKKSDIDEIVLVGGSTRIPKIQQLVKEFFNGKEPSRGINPDEAVAYGAAVQAGVLSGDQDTGDLVLLDVCPLTLGIETVGGVMTKLIPRNTVVPTKKSQIFSTASDNQPTVTIKVYEGERPLTKDNHLLGTFDLTGIPPAPRGVPQIEVTFEIDVNGILRVTAEDKGTGNKNKITITNDQNRLTPEEIERMVNDAEKFAEEDKKLKERIDTRNELESYAYSLKNQIGDKEKLGGKLSSEDKETMEKAVEEKIEWLESHQDADIEDFKAKKKELEEIVQPIISKLYGSAGPPPTGEEDTAEKDEL

DRUGINFO

IT-139

DRUGINFO

NKP-1339

DRUGINFO

SAM-6

KEGGPATH

hsa03060:Protein export

KEGGPATH

hsa04141:Protein processing in endoplasmic reticulum

KEGGPATH

hsa04612:Antigen processing and presentation

KEGGPATH

hsa04918:Thyroid hormone synthesis

KEGGPATH

hsa05020:Prion diseases