The function of ENSG00000060642 (PIGV, phosphatidylinositol glycan anchor biosynthesis class V) is as follows. Alpha-1,6-mannosyltransferase that catalyzes the transfer of the second mannose, via an alpha-1,6 bond, from a dolichol-phosphate- mannose (Dol-P-Man) to a 2-acyl-6-(alpha-D-mannosyl-(1->4)-alpha-D- glucosaminyl)-1-(1-radyl,2-acyl-sn-glycero-3-phospho)-1D-myo-inositol (also termed H2) intermediate to generate a 2-acyl-6-[alpha-D-mannosyl- (1->6)-alpha-D-mannosyl-(1->4)-alpha-D-glucosaminyl]-1-(1-radyl,2-acyl- sn-glycero-3-phospho)-1D-myo-inositol (also termed H3) and participates in the seventh step of the glycosylphosphatidylinositol-anchor biosynthesis (Probable) (PubMed:15623507). May also transfer the second mannose on a 2-acyl-6-[2-phosphoethanolamine-alpha-D-mannosyl-(1->4)- alpha-D-glucosaminyl]-1-(1-radyl,2-acyl-sn-glycero-3-phospho)-1D-myo- inositol (also termed H5), but less effectively (Probable). {ECO:0000269|PubMed:15623507, ECO:0000305|PubMed:15623507, ECO:0000305|PubMed:15720390}.