– Protein O-mannosyltransferase involved in O-glycosylation which is essential for cell wall rigidity. Forms a heterodimeric complex with PMT5 and more rarely with PMT1 to transfer mannose from Dol-P-mannose to Ser or Thr residues on proteins. Seems to have redundant activity to PMT2. PMT3 Protein, S. cerevisiae, Recombinant (His) is expressed in E. coli expression system with N-6xHis tag. The predicted molecular weight is 39.6 kDa and the accession number is P47190.