Involved in attachment of GPI anchor to protein. Acts upstream of or within neuron apoptotic process and neuron differentiation. Located in cytoplasmic vesicle. Part of GPI-anchor transamidase complex. Human ortholog(s) of this gene implicated in multiple congenital anomalies-hypotonia-seizures syndrome 3 and paroxysmal nocturnal hemoglobinuria. Orthologous to human PIGT (phosphatidylinositol glycan anchor biosynthesis class T). [provided by Alliance of Genome Resources, Apr 2022]