Promotes cell motility and migration, probably via its interaction with the cell membrane and with podosome proteins that mediate interaction with the cytoskeleton. Modulates membrane curvature and mediates membrane tubulation. Inhibits phagocytosis (By similarity). Plays a role in podosome formation. Homodimer. Interacts with BIN1. Interacts with ARHGEF6 (via SH3 domain), ARHGEF7 (via SH3 domain), SH3GL1, SH3GL2 and SH3GL3. Identified in a complex with ARHGEF6 and GIT2 (By similarity). Associates with membranes enriched in phosphoinositides. Detected in the actin-rich cell cortex at the leading edge of migrating cells. Detected at podosomes, at an actin-rich ring-like structure. The BAR domain mediates dimerization and interaction with membranes enriched in phosphatidylinositides.