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. Negatively regulated via phosphorylation. Interacts with EDE1 and PAN1. Localizes in a punctate pattern. Found in the actin cortical patches. Belongs to the epsin family.