Binds to membranes enriched in phosphatidylinositol 3,5-bisphosphate (PtdIns(3,5)P2) and phosphatidylinositol 4,5-bisphosphate (PtdIns(4,5)P2). Required for endocytosis and localization of actin. Localizes in a punctate pattern. Found in the actin cortical patches, although the majority is located at the cell periphery. Phosphorylated by PRK1. Present with 1970 molecules/cell in log phase SD medium. Belongs to the epsin family.