Ras-related protein which binds GDP/GTP and possesses intrinsic GTPase activity (By similarity). Involved in both yeast and hypha development. In the yeast phase, it is required for normal (polar) bud site selection and is involved in cell morphogenesis; in the yeast-mycelial transition it is involved in germ tube emergence; and in the development of the hyphae it is involved in cell elongation (PubMed:9308185). GTP + H2O = GDP + H(+) + phosphate Alternates between an inactive form bound to GDP and an active form bound to GTP. Activated by a guanine nucleotide-exchange factor (GEF) and inactivated by a GTPase-activating protein (GAP). Belongs to the small GTPase superfamily. Ras family.