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 (By similarity). Plays a role in podosome formation. Inhibits phagocytosis. Interacts with BIN1 and ARHGEF7 (via SH3 domain) (By similarity). Homodimer. Interacts with ARHGEF6 (via SH3 domain), SH3GL1, SH3GL2 and SH3GL3. Identified in a complex with ARHGEF6 and GIT2. 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. Detected in spleen, mast cells and macrophages (at protein level). The BAR domain mediates dimerization and interaction with membranes enriched in phosphatidylinositides.