Predicted to enable mannose-ethanolamine phosphotransferase activity. Predicted to be involved in GPI anchor biosynthetic process. Located in endoplasmic reticulum membrane. Expressed in body wall musculature; hypodermis; intestine; and pharynx. Human ortholog(s) of this gene implicated in multiple congenital anomalies-hypotonia-seizures syndrome 1. Is an ortholog of human PIGN (phosphatidylinositol glycan anchor biosynthesis class N).