Heat Shock 70kDa Protein-8 (HSPA8) Human Recombinant Protein

This gene encodes a member of the heat shock protein 70 family, which contains both heat-inducible and constitutively expressed members. This protein belongs to the latter group, which are also referred to as heat-shock cognate proteins. It functions as a chaperone, and binds to nascent polypeptides to facilitate correct folding. It also functions as an ATPase in the disassembly of clathrin-coated vesicles during transport of membrane components through the cell. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Aug 2011]

HSC70: Acts as a repressor of transcriptional activation. Inhibits the transcriptional coactivator activity of CITED1 on Smad-mediated transcription. Chaperone. Isoform 2 may function as an endogenous inhibitory regulator of HSC70 by competing the co- chaperones. Interacts with HSPH1/HSP105. Interacts with IRAK1BP1. Identified in a mRNP granule complex, at least composed of ACTB, ACTN4, DHX9, ERG, HNRNPA1, HNRNPA2B1, HNRNPAB, HNRNPD, HNRNPL, HNRNPR, HNRNPU, HSPA1, HSPA8, IGF2BP1, ILF2, ILF3, NCBP1, NCL, PABPC1, PABPC4, PABPN1, RPLP0, RPS3, RPS3A, RPS4X, RPS8, RPS9, SYNCRIP, TROVE2, YBX1 and untranslated mRNAs. Interacts with PACRG and TSC2. Interacts with BAG1. Interacts with SV40 VP1. Interacts with DNAJC7. Interacts with HERC5. Interacts with CITED1 (via N-terminus); the interaction suppresses the association of CITED1 to p300/CBP and Smad-mediated transcription transactivation. Constitutively synthesized. Ubiquitous. Belongs to the heat shock protein 70 family. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: Chaperone; RNA-binding; Nucleolus; Heat shock protein

Chromosomal Location of Human Ortholog: 11q24.1

Cellular Component: nucleoplasm; spliceosome; extracellular space; focal adhesion; membrane; melanosome; plasma membrane; nucleolus; intracellular; nucleus; ribonucleoprotein complex; cytosol; ubiquitin ligase complex

Molecular Function: protein binding; enzyme binding; G-protein-coupled receptor binding; heat shock protein binding; ubiquitin protein ligase binding; unfolded protein binding; ATPase activity; ATPase activity, coupled; ATP binding

Biological Process: axon guidance; chaperone cofactor-dependent protein folding; viral reproduction; transcription, DNA-dependent; protein folding; regulation of cell cycle; RNA splicing; neurotransmitter secretion; response to unfolded protein; nuclear mRNA splicing, via spliceosome; positive regulation of nuclear mRNA splicing, via spliceosome; synaptic transmission; gene expression; protein refolding; post-Golgi vesicle-mediated transport; negative regulation of transcription, DNA-dependent