Involved in cytoskeletal rearrangements required for phagocytosis of apoptotic cells and cell motility. Acts in association with DOCK1 and CRK. Was initially proposed to be required in complex with DOCK1 to activate Rac Rho small GTPases. May enhance the guanine nucleotide exchange factor (GEF) activity of DOCK1. Interacts with the SH3-domain of DOCK1 via its SH3-binding site. Probably part of a complex with DOCK1 and RAC1. Probably part of a complex with DOCK1 and CRK isoform CRK-II. Interacts with ARHGEF16, DOCK4 and EPHA2; mediates activation of RAC1 by EPHA2 (PubMed:20679435). Interacts with ADGRB3 (PubMed:24567399). Interacts with AUTS2; the interaction is direct (By similarity). Widely expressed, with a higher expression in skeletal muscle, kidney and placenta. The disease is caused by variants affecting the gene represented in this entry. Truncated N-terminus. Truncated N-terminus. Truncated N-terminus. Extended N-terminus.