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 (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 (PubMed:10330411). Forms a complex with EFNB1 and GRB4/NCK2 (PubMed:17310244). Expressed in the brain (at protein level). Tyrosine phosphorylated when coexpressed in cells with PTK2/FAK1 and SRC.