GTPase-activating protein for ADP ribosylation factor family members, including ARF1. May form heterooligomers with GIT1 (By similarity). Directly interacts with protein Piccolo/PCLO (By similarity). Interacts with PPFIA1 and PPFIA2 (By similarity). Interacts with ARHGEF7 (PubMed:10896954). Identified in a complex with ARHGEF6 and BIN2 (PubMed:23285027). Interacts with PAK3 (PubMed:10896954). Interacts with PXN/paxillin (PubMed:11251077). Interacts with TGFB1I1 (By similarity). Forms a complex with EFNB1 and GRB4/NCK2 (By similarity). Additional isoforms seem to exist.