This entry represents a group of fungal beta-mannosyltransferase that are involved in cell wall biosynthesis [1]. For example, in Candida albicans, BMT1-4 enzymes act stepwise to add beta-mannoses on to cell-wall phosphopeptidomannan (PPM). While Bmt5 and Bmt6 are involved in the addition of the first and third beta-mans to phospholipomannan (PLM), respectively [2]. Furthermore, in Saccharomyces cerevisiae, BMT5 and BMT6 are responsible for methylation of uridine residues in the 25S rRNA [3].

1: Identification of a new family of genes involved in beta-1,2-mannosylation of glycans in Pichia pastoris and Candida albicans. Mille C, Bobrowicz P, Trinel PA, Li H, Maes E, Guerardel Y, Fradin C, Martinez-Esparza M, Davidson RC, Janbon G, Poulain D, Wildt S; J Biol Chem. 2008;283:9724-9736. PMID:18234669

2: Members 5 and 6 of the Candida albicans BMT family encode enzymes acting specifically on beta-mannosylation of the phospholipomannan cell-wall glycosphingolipid. Mille C, Fradin C, Delplace F, Trinel PA, Masset A, Francois N, Coddeville B, Bobrowicz P, Jouault T, Guerardel Y, Wildt S, Janbon G, Poulain D; Glycobiology. 2012;22:1332-1342. PMID:22745283

3: Identification of novel methyltransferases, Bmt5 and Bmt6, responsible for the m3U methylations of 25S rRNA in Saccharomyces cerevisiae. Sharma S, Yang J, Duttmann S, Watzinger P, Kotter P, Entian KD; Nucleic Acids Res. 2014;42:3246-3260. PMID:24335083