Predicted to contribute to phosphatidylinositol N-acetylglucosaminyltransferase activity. Predicted to act upstream of or within GPI anchor biosynthetic process. Predicted to be located in endoplasmic reticulum. Predicted to be part of glycosylphosphatidylinositol-N-acetylglucosaminyltransferase (GPI-GnT) complex. Human ortholog(s) of this gene implicated in developmental and epileptic encephalopathy 55. Orthologous to human PIGP (phosphatidylinositol glycan anchor biosynthesis class P). [provided by Alliance of Genome Resources, Apr 2022]