Cell wall protein necessary for cell wall integrity. 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 PGA59 family. Could be the product of a pseudogene unlikely to encode a functional protein. Strain S288c has a stop codon in position 67, which disrupts the gene coding for this protein and produces two ORFs. Because of that it is not part of the S.cerevisiae S288c complete/reference proteome set. Truncated C-terminus.