Enables GTP binding activity and protein homodimerization activity. Involved in lymphocyte differentiation and protein stabilization. Predicted to be active in endomembrane system. Is expressed in acoustic ganglion; otocyst; and urinary system. Human ortholog(s) of this gene implicated in pancreatic cancer. Orthologous to human RABL3 (RAB, member of RAS oncogene family like 3). [provided by Alliance of Genome Resources, Apr 2022]