SGTA Co-chaperone that binds misfolded and hydrophobic patches-containing client proteins in the cytosol. Mediates their targeting to the endoplasmic reticulum but also regulates their sorting to the proteasome when targeting fails. Functions in tail-anchored/type II transmembrane proteins membrane insertion constituting with ASNA1 and the BAG6 complex a targeting module. Functions upstream of the BAG6 complex and ASNA1, binding more rapidly the transmembrane domain of newly synthesized proteins. It is also involved in the regulation of the endoplasmic reticulum-associated misfolded protein catabolic process via its interaction with BAG6: collaborates with the BAG6 complex to maintain hydrophobic substrates in non-ubiquitinated states. Competes with RNF126 for interaction with BAG6, preventing the ubiquitination of client proteins associated with the BAG6 complex. Binds directly to HSC70 and HSP70 and regulates their ATPase activity. (Microbial infection) In case of infection by polyomavirus, involved in the virus endoplasmic reticulum membrane penetration and infection via interaction with DNAJB12, DNAJB14 and HSPA8/Hsc70. Belongs to the SGT family. Ubiquitous. Note: This description may include information from UniProtKB.
Protein type: Chaperone
Chromosomal Location of Human Ortholog: 10 C1|10 39.72 cM
Cellular Component:  cytoplasm; cytosol; extrinsic component of synaptic vesicle membrane; membrane; nucleus; presynapse; TRC complex
Molecular Function:  BAT3 complex binding; identical protein binding; protein heterodimerization activity; protein homodimerization activity; protein self-association
Biological Process:  chaperone-mediated protein folding; negative regulation of ER-associated ubiquitin-dependent protein catabolic process; negative regulation of ubiquitin-dependent protein catabolic process; positive regulation of chaperone-mediated protein folding; positive regulation of ER-associated ubiquitin-dependent protein catabolic process; posttranslational protein targeting to endoplasmic reticulum membrane; tail-anchored membrane protein insertion into ER membrane; ubiquitin-dependent ERAD pathway
Reference #:  Q8BJU0 (UniProtKB)
Alt. Names/Synonyms: 5330427H01Rik; AI194281; Alpha-SGT; D10Ertd190; D10Ertd190e; MGC6336; Sgt; Sgta; small glutamine-rich tetratricopeptide repeat (TPR) containing protein; small glutamine-rich tetratricopeptide repeat (TPR)-containing, alpha; Small glutamine-rich tetratricopeptide repeat-containing protein alpha; Stg
Gene Symbols: Sgta
Molecular weight: 34,322 Da
Basal Isoelectric point: 4.99  Predict pI for various phosphorylation states
Select Structure to View Below


Protein Structure Not Found.

Cross-references to other databases:  STRING  |  BioGPS  |  Pfam  |  Phospho.ELM  |  NetworKIN  |  UniProtKB  |  Entrez-Gene  |  Ensembl Gene