Predicted to enable GTPase activity. Involved in determination of adult lifespan and regulation of autophagosome assembly. Predicted to be located in lysosome and nucleus. Predicted to be part of Gtr1-Gtr2 GTPase complex. Human ortholog(s) of this gene implicated in primary hypomagnesemia. Is an ortholog of human RRAGC (Ras related GTP binding C) and RRAGD (Ras related GTP binding D).