RhoGAP-domain containing protein; identified as a multicopy suppressor of ts alleles of CDC24, CDC42 and the BEM4 null allele; involved in polarity establishment; upstream regulator of 1,3-beta-glucan synthase and the Pkc1p-MAPK pathway; proposed role promoting Cdc42p function and inhibiting Rho1p function during early bud development; localizes to sites of polarized growth; potential Cdc28p substrate; relocalizes from the bud neck to the cytoplasm upon DNA replication stress