Regulator of 1,3-beta-glucan biosynthesis; auxiliary subunit of 1,3-beta-D-glucan synthase that interacts with catalytic (Fks1p/ Gsc2p) and regulatory subunits (Rho1p); activates and stabilizes Fks1p; negative genetic interaction with RHO1; localizes to the cell periphery (early G1), the bud tip (late G1), the bud (S/G2), the bud periphery (metaphase) and at the bud neck (telophase); periodically expressed during the cell cycle; protein abundance increases in response to DNA replication stress