Implicated in endocytosis. May recruit other proteins to membranes with high curvature (By similarity). Interacts with ARC, SYNJ1 and DNM1. Interacts with PDCD6IP. Interacts with BIN2 (By similarity). Associated with postsynaptic endosomes in hippocampal neurons. An N-terminal amphipathic helix, the BAR domain and a second amphipathic helix inserted into helix 1 of the BAR domain (N-BAR domain) induce membrane curvature and bind curved membranes. Belongs to the endophilin family.