Esterifies acyl-group from acyl-ACP to the sn-1 position of glycerol-3-phosphate, an essential step in glycerolipid biosynthesis. an acyl-CoA + sn-glycerol 3-phosphate = a 1-acyl-sn-glycero-3-phosphate + CoA Phospholipid metabolism; CDP-diacylglycerol biosynthesis; CDP-diacylglycerol from sn-glycerol 3-phosphate: step 1/3. The HXXXXD motif is essential for acyltransferase activity and may constitute the binding site for the phosphate moiety of the glycerol-3-phosphate. Belongs to the GPAT/DAPAT family. Was originally thought to correspond to two different genes At4g00400 and At4g00410. Was originally thought to correspond to two different genes At4g00400 and At4g00410. Was originally thought to correspond to two different genes At4g00400 and At4g00410. Was originally thought to correspond to two different genes At4g00400 and At4g00410. Was originally thought to correspond to two different genes At4g00400 and At4g00410. Was originally thought to correspond to two different genes At4g00400 and At4g00410.