Predicted to enable GTPase activator activity and small GTPase binding activity. Predicted to be involved in endosomal transport; negative regulation of endocytic recycling; and transferrin transport. Predicted to act upstream of or within regulation of GTPase activity and small GTPase mediated signal transduction. Located in perinuclear region of cytoplasm. Orthologous to human ARHGAP1 (Rho GTPase activating protein 1). [provided by Alliance of Genome Resources, Apr 2022]