Term Name:	dol-P-Man:Man(3)GlcN-acyl-PI alpha-1,2-mannosyltransferase activity
Synonyms:	glycosylphosphatidylinositol-mannosyltransferase IV activity, GPI-MT-IV activity
Definition:	Catalysis of the transfer of an alpha-D-mannosyl residue from dolichol-P-mannose to Man(3)-GlcN-acyl-PI, forming an alpha-(1->2)-D-mannosyl-D-mannose linkage. This transfers a fourth mannose to the GPI precursor, which is only present in some organisms/cell types.
Ontology:	GO: Molecular Function [GO:0120565]    QuickGO    AmiGO