Predicted to enable lipid phosphatase activity; lysophosphatidic acid phosphatase activity; and phosphatidate phosphatase activity. Acts upstream of or within inner ear development. Is integral component of postsynaptic density membrane. Is active in glutamatergic synapse. Is expressed in male reproductive system; primary sex cord; retina; and testis. Orthologous to human PLPPR4 (phospholipid phosphatase related 4). [provided by Alliance of Genome Resources, Apr 2022]