a member of the HSP family of molecular chaperones required for endoplasmic reticulum integrity and stress-induced autophagy. Plays a central role in regulating the unfolded protein response (UPR), and is an obligatory component of autophagy in mammalian cells.. May play an important role in cellular adaptation and oncogenic survival. One of the client proteins of GRP78 is protein double-stranded RNA-activated protein-like endoplasmic reticulum kinase (PERK). Probably plays a role in facilitating the assembly of multimeric protein complexes inside the ER. Note: This description may include information from UniProtKB.
Protein type: Chaperone
Cellular Component: signalosome; endoplasmic reticulum membrane; cell surface; endoplasmic reticulum lumen; endoplasmic reticulum; perinuclear region of cytoplasm; melanosome; ER-Golgi intermediate compartment; integral to endoplasmic reticulum membrane; midbody; nucleus
Molecular Function: protein binding, bridging; protein domain specific binding; protein binding; ubiquitin protein ligase binding; chaperone binding; ATPase activity; caspase inhibitor activity; unfolded protein binding; ribosome binding; misfolded protein binding; calcium ion binding; ATP binding
Biological Process: ATP catabolic process; platelet activation; ER-associated protein catabolic process; cerebellum structural organization; unfolded protein response; cerebellar Purkinje cell layer development; negative regulation of caspase activity; cellular response to glucose starvation; platelet degranulation; unfolded protein response, activation of signaling protein activity; positive regulation of protein ubiquitination; blood coagulation; negative regulation of transforming growth factor beta receptor signaling pathway; ER overload response; negative regulation of apoptosis
SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.