Reaction: (1) dolichyl β-D-mannosyl phosphate + L-threonyl-[protein] = dolichyl phosphate + 3-O-(α-D-mannosyl)-L-threonyl-[protein]
(2) dolichyl β-D-mannosyl phosphate + L-seryl-[protein] = dolichyl phosphate + 3-O-(α-D-mannosyl)-L-seryl-[protein]
For diagram of reaction click here.
Other name(s): dolichol phosphomannose-protein mannosyltransferase; protein O-D-mannosyltransferase; dolichyl-phosphate-D-mannose:protein O-D-mannosyltransferase; dolichyl-phosphate-mannose-protein mannosyltransferase
Systematic name: dolichyl-D-mannosyl-phosphate:protein O-D-mannosyltransferase
Comments: The enzyme transfers mannosyl residues to the hydroxy group of serine or threonine residues, producing cell-wall mannoproteins. It acts only on long-chain α-dihydropolyprenyl derivatives, larger than C35.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, PDB, CAS registry number: 74315-99-4
References:
1. Babczinski, P., Haselbeck, A. and Tanner, W. Yeast mannosyl transferases requiring dolichyl phosphate and dolichyl phosphate mannose as substrate. Partial purification and characterization of the solubilized enzyme. Eur. J. Biochem. 105 (1980) 509-515. [PMID: 6989607]
2. Palamarczyk, G., Lehle, L., Mankowski, T., Chojnacki, T. and Tanner, W. Specificity of solubilized yeast glycosyl transferases for polyprenyl derivatives. Eur. J. Biochem. 105 (1980) 517-523. [PMID: 6445267]