Predicted to enable guanyl-nucleotide exchange factor activity. Predicted to be involved in positive regulation of Ras protein signal transduction. Is expressed in embryonic brain; larval nervous system; and larval ventral nerve cord. Orthologous to several human genes including BCAR3 (BCAR3 adaptor protein, NSP family member) and SH2D3C (SH2 domain containing 3C).