Predicted to enable CP2 mannose-ethanolamine phosphotransferase activity. Predicted to be involved in GPI anchor biosynthetic process. Predicted to be located in endoplasmic reticulum. Predicted to be integral component of endoplasmic reticulum membrane. Human ortholog(s) of this gene implicated in autosomal recessive non-syndromic intellectual disability. Orthologous to human PIGG (phosphatidylinositol glycan anchor biosynthesis class G). [provided by Alliance of Genome Resources, Apr 2022]