Term Name:	GDP-Man:Man(1)GlcNAc(2)-PP-Dol alpha-1,3-mannosyltransferase activity
Synonyms:	GDP-D-mannose:D-Man-beta-(1->4)-D-GlcNAc-beta-(1->4)-D-GlcNAc-diphosphodolichol 3-alpha-mannosyltransferase activity, GDP-mannose-oligosaccharide-lipid mannosyltransferase II, GDP-mannose:glycolipid 1,3-alpha-D-mannosyltransferase activity, glycolipid 3-alpha-mannosyltransferase activity, guanosine diphosphomannose-oligosaccharide-lipid II mannosyltransferase activity, mannosyltransferase II activity
Definition:	Catalysis of the reaction: a beta-D-Man-(1->4)-beta-D-GlcNAc-(1->4)-alpha-D-GlcNAc-diphospho-di-trans,poly-cis-dolichol + GDP-alpha-D-mannose = an alpha-D-Man-(1->3)-beta-D-Man-(1->4)-beta-D-GlcNAc-(1->4)-alpha-D-GlcNAc-diphospho-di-trans,poly-cis-dolichol + GDP + H+.
Ontology:	GO: Molecular Function [GO:0004378]    QuickGO    AmiGO