Predicted to enable GPI-anchor transamidase activity. Predicted to be involved in attachment of GPI anchor to protein and protein localization to cell surface. Predicted to act upstream of or within GPI anchor biosynthetic process. Predicted to be located in endoplasmic reticulum and membrane. Predicted to be integral component of membrane. Predicted to be part of GPI-anchor transamidase complex. Is expressed in several structures, including alimentary system; eye; heart; integumental system; and nervous system. Orthologous to human PIGK (phosphatidylinositol glycan anchor biosynthesis class K). [provided by Alliance of Genome Resources, Apr 2022]