The function of Ensembl gene identifier ENSG00000185808 (PIGP, phosphatidylinositol glycan anchor biosynthesis class P) is as follows. Part of the glycosylphosphatidylinositol-N- acetylglucosaminyltransferase (GPI-GnT) complex that catalyzes the transfer of N-acetylglucosamine from UDP-N-acetylglucosamine to phosphatidylinositol and participates in the first step of GPI biosynthesis. {ECO:0000269|PubMed:10944123, ECO:0000269|PubMed:16162815, ECO:0000269|PubMed:28334793}.