Predicted to enable GTPase activator activity and small GTPase binding activity. Predicted to be involved in several processes, including Rap protein signal transduction; activation of GTPase activity; and regulation of Rab protein signal transduction. Predicted to be located in cytosol and gap junction. Orthologous to human SGSM3 (small G protein signaling modulator 3). [provided by Alliance of Genome Resources, Apr 2022]