Predicted to enable GTPase activity. Predicted to be involved in several processes, including autophagosome assembly; protein localization to Golgi apparatus; and regulation of vesicle-mediated transport. Is active in presynapse. Human ortholog(s) of this gene implicated in Smith-McCort dysplasia. Orthologous to human RAB33B (RAB33B, member RAS oncogene family). [provided by Alliance of Genome Resources, Apr 2022]