Predicted to enable mannose-6-phosphate isomerase activity. Predicted to be involved in GDP-mannose biosynthetic process. Predicted to be located in cytosol. Expressed in amphid neurons; head neurons; hypodermis; intestine; and nervous system. Human ortholog(s) of this gene implicated in congenital disorder of glycosylation Ib. Is an ortholog of human MPI (mannose phosphate isomerase).