background:
This intronless gene encodes a 70kDa heat shock protein which is a member of the heat shock protein 70 family. In conjuction with other heat shock proteins, this protein stabilizes existing proteins against aggregation and mediates the folding of newly translated proteins in the cytosol and in organelles. It is also involved in the ubiquitin-proteasome pathway through interaction with the AU-rich element RNA-binding protein 1. The gene is located in the major histocompatibility complex class III region, in a cluster with two closely related genes which encode similar proteins. [provided by RefSeq, Jul 2008].
Function:
In cooperation with other chaperones, Hsp70s stabilize preexistent proteins against aggregation and mediate the folding of newly translated polypeptides in the cytosol as well as within organelles. These chaperones participate in all these processes through their ability to recognize nonnative conformations of other proteins. They bind extended peptide segments with a net hydrophobic character exposed by polypeptides during translation and membrane translocation, or following stress-induced damage. In case of rotavirus A infection, serves as a post-attachment receptor for the virus to facilitate entry into the cell.
Subunit:
Component of the CatSper complex. 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 TSC2. Interacts with IRAK1BP1. Interacts with TERT; the interaction occurs in the absence of the RNA component, TERC, and dissociates once the TERT complex has formed. Interacts with DNAJC7. Interacts with CHCHD3.
Subcellular Location:
Cytoplasm. Note=Localized in cytoplasmic mRNP granules containing untranslated mRNAs.
Tissue Specificity:
HSPA1B is testis-specific.
Similarity:
Belongs to the heat shock protein 70 family.
Database links:
Entrez Gene: 281825 Cow
Entrez Gene: 3303 Human
Entrez Gene: 3304 Human
Entrez Gene: 15511 Mouse
Entrez Gene: 193740 Mouse
Entrez Gene: 24472 Rat
Entrez Gene: 294254 Rat
Omim: 140550 Human
Omim: 603012 Human
SwissProt: Q27975 Cow
SwissProt: P0DMV8 Human
SwissProt: P0DMV9 Human
SwissProt: P17879 Mouse
SwissProt: Q61696 Mouse
SwissProt: Q07439 Rat
Unigene: 27882 Human
Unigene: 719966 Human
Unigene: 728810 Human
Unigene: 1950 Rat
Unigene: 228225 Rat
Important Note:
This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications.
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