Oxysterol-binding protein homolog 3

UniProtKB accession:  P38713

Grouped By:  Matching UniProtKB accession

UniProtKB description:  Lipid transport protein (LTP) involved in non-vesicular transfer of lipids between membranes. Functions in phosphoinositide-coupled directional transport of various lipids by carrying the lipid molecule in a hydrophobic pocket and transferring it between membranes through the cytosol. Involved in maintenance of intracellular sterol distribution and homeostasis (PubMed:11238399, PubMed:15173322). May serve as a sensor of PI4P levels at PM-ER membrane contact site, regulating PI4P phosphatase SAC1 activity (PubMed:21295699). May be involved in ergosterol transport from the plasma membrane (PM) to the ER, however it does not bind sterols directly (PubMed:16585271, PubMed:23791945). Plays a role in the positive regulation of vesicular transport of ceramide from the ER to the Golgi, negatively regulating COPII-mediated ER export of cargos (PubMed:24213531).