Function | Lipid transporter involved in lipid countertransport between the Golgi complex and membranes of the endoplasmic reticulum: specifically exchanges sterol with phosphatidylinositol 4-phosphate (PI4P), delivering sterol to the Golgi in exchange for PI4P, which is degraded by the SAC1/SACM1L phosphatase in the endoplasmic reticulum. Binds cholesterol and a range of oxysterols including 25-hydroxycholesterol. Cholesterol binding promotes the formation of a complex with PP2A and a tyrosine phosphatase which dephosphorylates ERK1/2, whereas 25-hydroxycholesterol causes its disassembly. Regulates cholesterol efflux by decreasing ABCA1 stability. |
Protein Name | Oxysterol-Binding Protein 1 |
Database Links | Reactome: R-HSA-1660661Reactome: R-HSA-192105 |
Cellular Localisation | CytoplasmCytosolPerinuclear RegionGolgi Apparatus MembranePeripheral Membrane ProteinEndoplasmic Reticulum MembraneGolgi ApparatusTrans-Golgi NetworkPredominantly Cytosolic |
Alternative Antibody Names | Anti-Oxysterol-Binding Protein 1 antibodyAnti-OSBP antibodyAnti-OSBP1 antibody |
Information sourced from Uniprot.org