Enables 1-acylglycerophosphoethanolamine O-acyltransferase activity. Involved in phosphatidylethanolamine acyl-chain remodeling; phospholipid biosynthetic process; and regulation of neuron projection development. Located in endoplasmic reticulum membrane. Is expressed in several structures, including gut; integumental system; nervous system; respiratory system; and urinary system. Orthologous to human MBOAT1 (membrane bound O-acyltransferase domain containing 1). [provided by Alliance of Genome Resources, Apr 2022]