Probable cell wall protein which may have esterase activity, with a preference for esters of fatty acids from 4 to 16 carbon atoms. Expression is regulated upon white-opaque switching. Repressed by RIM101 and alpha pheromone, and up-regulated upon interaction with macrophages. The GPI-anchor is attached to the protein in the endoplasmic reticulum and serves to target the protein to the cell surface. There, the glucosamine-inositol phospholipid moiety is cleaved off and the GPI-modified mannoprotein is covalently attached via its lipidless GPI glycan remnant to the 1,6-beta-glucan of the outer cell wall layer (By similarity). Belongs to the SRP1/TIP1 family.