part of mannosyltransferase activity dolichyl-phosphate-mannose-protein mannosyltransferase activity https://github.com/geneontology/go-ontology/issues/30193 MetaCyc:2.4.1.109-RXN protein O-D-mannosyltransferase activity dolichol phosphomannose-protein mannosyltransferase activity O-glycoside mannosyltransferase Reactome:R-HSA-5615637 Reactome:R-HSA-5615604 protein O-mannosyltransferase activity dolichyl-phosphate-mannose-protein O-mannosyltransferase activity GO:0004169 Reactome:R-HSA-5615556 Note that this activity has never been observed in green plants. However, N- and C-mannosylation may occur in these species; see figure 1 in PMID:21558543. molecular_function dolichyl-phosphate-D-mannose:protein O-D-mannosyltransferase activity Reactome:R-HSA-9816277 EC:2.4.1.109 Catalysis of the reaction: dolichyl phosphate D-mannose + protein = dolichyl phosphate + O-D-mannosylprotein. protein O-linked glycosylation via mannose catalytic activity, acting on a protein