Molecular function

dolichyl-phosphate-mannose-protein O-mannosyltransferase activity, protein O-mannosyltransferase activity

Catalysis of the reaction: dolichyl phosphate D-mannose + protein = dolichyl phosphate + O-D-mannosylprotein.

dolichol phosphomannose-protein mannosyltransferase activity, dolichyl-phosphate-D-mannose:protein O-D-mannosyltransferase activity, protein O-D-mannosyltransferase activity

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.