ACAP1 (phospho Ser554) rabbit pAb

Domain: PH domain binds phospholipids including phosphatidic acid, phosphatidylinositol 3-phosphate, phosphatidylinositol 3, 5-bisphosphate (PIP2) and phosphatidylinositol 3, 4, 5-trisphosphate (PIP3). May mediate ACAP1-binding to PIP2 or PIP3 containing membranes. enzyme regulation: GAP activity stimulated by phosphatidylinositol 4, 5-bisphosphate (PIP2) and phosphatidic acid. function: GTPase-activating protein (GAP) for ADP ribosylation factor 6 (ARF6) required for clathrin-dependent export of proteins from recycling endosomes to trans-Golgi network and cell surface. miscellaneous: Cells overexpressing ACAP1 show an accumulation of ITGB1 in recycling endosomes and inhibition of stimulation-dependent cell migration. Cells with reduced levels of ACAP1 or AKT1 and AKT2 show inhibition of stimulation-dependent cell migration. Cells overexpressing ACAP1 and PIP5K1C show formation of tubular structures derived from endosomal membranes. PTM: Phosphorylation at Ser-554 by PKB is required for interaction with ITGB1, export of ITGB1 from recycling endosomes to the cell surface and ITGB1-dependent cell migration. similarity: Contains 1 Arf-GAP domain. similarity: Contains 1 BAR domain. similarity: Contains 1 PH domain. similarity: Contains 3 ANK repeats. subunit: Interacts with GTP-bound ARF6. Interacts with third cytoplasmic loop of SLC2A4/GLUT4. Interacts with CLTC. Interacts with GULP1. Forms a complex with GDP-bound ARF6 and GULP1. tissue specificity: Highest level in lung and spleen. Low level in heart, kidney, liver and pancreas.