GTP-binding protein of the rho subfamily of Ras-like small GTPases; involved in establishment of cell polarity; regulates protein kinase C (Pkc1p); positive regulatory subunit of the 1,3-beta-D-glucan synthase complex that induces active site rearrangement resulting in activation of 1,3-beta-glucan synthase (Fks1p and Gsc2p), an enzyme involved in cell wall biosynthesis