Provides CDP-diacylglycerol, an important precursor for the synthesis of phosphatidylinositol (PtdIns). a 1,2-diacyl-sn-glycero-3-phosphate + CTP + H(+) = a CDP-1,2-diacyl-sn-glycerol + diphosphate Phospholipid metabolism; CDP-diacylglycerol biosynthesis; CDP-diacylglycerol from sn-glycerol 3-phosphate: step 3/3. Reduced levels of phosphatidylinositol. No effect on two-cell stage nuclear morphology. Significant rescue of the nuclear morphology defects resulting from inhibition of cnep-1 or partial inhibition of lpin-1 but does not rescue the nuclear envelope disassembly defects observed following depletion of npp-12. Belongs to the CDS family.