Mouse Phosphatidylinositol N-acetylglucosaminyltransferase subunit Y,PIGY ELI

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.

May act by regulating the catalytic subunit PIGA.

{ECO:0000250|UniProtKB:Q3MUY2}.