Enables 1-acylglycerol-3-phosphate O-acyltransferase activity. Involved in phospholipid metabolic process. Located in endoplasmic reticulum. Is active in mitochondrial outer membrane. Is expressed in several structures, including nervous system; skin; stomach; and testis. Orthologous to human AGPAT4 (1-acylglycerol-3-phosphate O-acyltransferase 4). [provided by Alliance of Genome Resources, Apr 2022]