a critical chaperone protein that has a high affinity for unfolded polypeptide chains. It binds extended peptide segments with a net hydrophobic character exposed by polypeptides during translation and membrane translocation, or following stress-induced damage. In cooperation with other chaperones, hsp70 stabilizes preexistent proteins against aggregation and mediates the folding of newly translated polypeptides in the cytosol as well as within organelles. Mitochondrial HSP70 is crucial to the import process: mutant forms of HSP70 fail to import precursor proteins. Is anti-apoptotic in sympathetic neurones and mediates this effect primarily by suppressing c-Jun transcriptional signalling. Interacts with tau protein and mediates proper folding of tau. Can promote the degradation of tau protein. Triptolide, a potential therapeutic agent for progression/metastasis of pancreatic cancer, causes pancreatic cancer cell death by induction of apoptosis, an effect mediated by the inhibition of HSP70. Note: This description may include information from UniProtKB.
Protein type: Chaperone; Heat shock protein; Motility/polarity/chemotaxis
Molecular Function: viral receptor activity; protein binding; enzyme binding; G-protein-coupled receptor binding; ubiquitin protein ligase binding; heat shock protein binding; double-stranded RNA binding; unfolded protein binding; ATPase activity; protein N-terminus binding; ATPase activity, coupled; ATP binding
Biological Process: negative regulation of cell proliferation; entry of virus into host cell; protein stabilization; positive regulation of erythrocyte differentiation; mRNA catabolic process; protein refolding; gene expression; negative regulation of protein ubiquitination; negative regulation of cell growth; response to unfolded protein; 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.