| Function | Endoplasmic reticulum (ER)-anchored protein that mediates the formation of contact sites between the ER and endosomes via interaction with FFAT motif-containing proteins such as STARD3 or WDR44. STARD3-VAPA interaction enables cholesterol transfer from the ER to endosomes. Via interaction with WDR44 participates in neosynthesized protein export. In addition, recruited to the plasma membrane through OSBPL3 binding. The OSBPL3-VAPA complex stimulates RRAS signaling which in turn attenuates integrin beta-1 (ITGB1) activation at the cell surface. With OSBPL3, may regulate ER morphology. May play a role in vesicle trafficking. |
| Protein Name | Vesicle-Associated Membrane Protein-Associated Protein AVamp-AVamp-Associated Protein AVap-A33 Kda Vamp-Associated ProteinVap-33 |
| Database Links | Reactome: R-HSA-1660661Reactome: R-HSA-6798695Reactome: R-HSA-9609523 |
| Cellular Localisation | Endoplasmic Reticulum MembraneSingle-Pass Type Iv Membrane ProteinCell MembraneCell JunctionTight JunctionNucleus MembranePresent In The Plasma Membrane And In Intracellular VesiclesTogether With Snare ProteinsMay Also Associate With The CytoskeletonColocalizes With Ocln At The Tight Junction In Polarized Epithelial Cells |
| Alternative Protein Names | Vesicle-Associated Membrane Protein-Associated Protein A proteinVamp-A proteinVamp-Associated Protein A proteinVap-A protein33 Kda Vamp-Associated Protein proteinVap-33 proteinVAPA proteinVAP33 protein |
Information sourced from Uniprot.org
