This is a family of glycosylphosphatidylinositol-anchored beta(1-3)glucanosyltransferases. The active site residues in the Aspergillus fumigatus example Swiss:B0XT72 are the two glutamate residues at 160 and 261 [3].

1: Determinants for glycophospholipid anchoring of the Saccharomyces cerevisiae GAS1 protein to the plasma membrane. Nuoffer C, Jeno P, Conzelmann A, Riezman H; Mol Cell Biol 1991;11:27-37. PMID:1824714

2: PHR1, a pH-regulated gene of Candida albicans, is required for morphogenesis. Saporito-Irwin SM, Birse CE, Sypherd PS, Fonzi WA; Mol Cell Biol 1995;15:601-613. PMID:7823929

3: Identification of the catalytic residues of the first family of beta(1-3)glucanosyltransferases identified in fungi. Mouyna I, Monod M, Fontaine T, Henrissat B, Lechenne B, Latge JP; Biochem J. 2000;347:741-747. PMID:10769178