GTPase-activating protein for ADP ribosylation factor family members, including ARF1. May form heterooligomers with GIT1 (Probable). Directly interacts with protein Piccolo/PCLO (PubMed:12473661). Interacts with PPFIA1 and PPFIA2 (PubMed:12629171). Interacts with ARHGEF7 (By similarity). Identified in a complex with ARHGEF6 and BIN2 (By similarity). Interacts with PAK3 (By similarity). Interacts with PXN/paxillin (By similarity). Interacts with TGFB1I1 (By similarity). Forms a complex with EFNB1 and GRB4/NCK2 (By similarity).