Enables lysophosphatidic acid acyltransferase activity. Predicted to act upstream of or within phospholipid biosynthetic process. Located in endoplasmic reticulum. Is expressed in several structures, including alimentary system; genitourinary system; integumental system; nervous system; and sensory organ. Orthologous to human AGPAT3 (1-acylglycerol-3-phosphate O-acyltransferase 3). [provided by Alliance of Genome Resources, Apr 2022]