The function of PIGT (phosphatidylinositol glycan anchor biosynthesis class T, ENSG00000124155) is as follows. Component of the glycosylphosphatidylinositol-anchor (GPI- anchor) transamidase (GPI-T) complex that catalyzes the formation of the linkage between a proprotein and a GPI-anchor and participates in GPI anchored protein biosynthesis (PubMed:11483512, PubMed:12582175, PubMed:28327575, PubMed:34576938, PubMed:35165458, PubMed:35551457, PubMed:36970549, PubMed:37684232). May play a crucial role in GPI-T complex assembly in the luminal layer (PubMed:35165458, PubMed:35551457). Binds GPI-anchor (PubMed:37684232). {ECO:0000269|PubMed:11483512, ECO:0000269|PubMed:12582175, ECO:0000269|PubMed:28327575, ECO:0000269|PubMed:34576938, ECO:0000269|PubMed:35165458, ECO:0000269|PubMed:35551457, ECO:0000269|PubMed:36970549, ECO:0000269|PubMed:37684232}.