Predicted to enable guanyl-nucleotide exchange factor activity and lipid binding activity. Predicted to be involved in regulation of ARF protein signal transduction. Predicted to be located in cell projection and plasma membrane. Predicted to be active in ruffle membrane. Is expressed in several structures, including central nervous system; eye; gonad; hemolymphoid system gland; and liver. Orthologous to human PSD4 (pleckstrin and Sec7 domain containing 4). [provided by Alliance of Genome Resources, Apr 2022]