Predicted to enable GTP binding activity and GTPase activity. Acts upstream of or within several processes, including Rho protein signal transduction; regulation of cell shape; and retina vasculature morphogenesis in camera-type eye. Predicted to be located in plasma membrane. Is expressed in several structures, including central nervous system; genitourinary system; retina; vascular system; and vertebral axis musculature. Orthologous to human RHOJ (ras homolog family member J). [provided by Alliance of Genome Resources, Apr 2022]