Functions in the biosynthesis of the anionic phospholipids phosphatidylglycerol and cardiolipin. a CDP-1,2-diacyl-sn-glycerol + sn-glycerol 3-phosphate = 1,2-diacyl-sn-glycero-3-phospho-(1'-sn-glycero-3'-phosphate) + CMP + H(+) Activated by calcium and magnesium and inhibited by other bivalent cations. Phospholipid metabolism; phosphatidylglycerol biosynthesis; phosphatidylglycerol from CDP-diacylglycerol: step 1/2. Belongs to the CDP-alcohol phosphatidyltransferase class-II family. Extended N-terminus. Wrong choice of CDS.