Known as: dolichyl-phosphate-D-mannose:protein O-D-mannosyltransferase activity, protein O-D-mannosyltransferase activity, protein O-mannosyltransferase activity
Catalysis of the reaction: dolichyl phosphate D-mannose + protein = dolichyl phosphate + O-D-mannosylprotein. [EC:2.4.1.109, GOC:pr]