The function of Ensembl gene identifier ENSG00000063245 (EPN1, epsin 1) is as follows. Binds to membranes enriched in phosphatidylinositol 4,5- bisphosphate (PtdIns(4,5)P2). Modifies membrane curvature and facilitates the formation of clathrin-coated invaginations (By similarity). Regulates receptor-mediated endocytosis (PubMed:10393179, PubMed:10557078). {ECO:0000250|UniProtKB:O88339, ECO:0000269|PubMed:10393179, ECO:0000269|PubMed:10557078}.