Esterifies acyl-group from acyl-ACP to the sn-1 position of glycerol-3-phosphate, an essential step in glycerolipids biosynthesis such as triglycerides, phosphatidic acids and lysophosphatidic acids. an acyl-CoA + sn-glycerol 3-phosphate = a 1-acyl-sn-glycero-3-phosphate + CoA (9Z,12Z)-octadecadienoyl-CoA + sn-glycerol 3-phosphate = 1-(9Z,12Z)-octadecadienoyl-sn-glycero-3-phosphate + CoA (9Z)-octadecenoyl-CoA + sn-glycerol 3-phosphate = 1-(9Z-octadecenoyl)-sn-glycero-3-phosphate + CoA octadecanoyl-CoA + sn-glycerol 3-phosphate = 1-octadecanoyl-sn-glycero-3-phosphate + CoA hexadecanoyl-CoA + sn-glycerol 3-phosphate = 1-hexadecanoyl-sn-glycero-3-phosphate + CoA dodecanoyl-CoA + sn-glycerol 3-phosphate = 1-dodecanoyl-sn-glycerol 3-phosphate + CoA 1-acyl-sn-glycero-3-phospho-(1'-sn-glycerol) + an acyl-CoA = 1,2-diacyl-sn-glycero-3-phospho-(1'-sn-glycerol) + 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.