Phosphatidate cytidylyltransferase (EC 2.7.7.41) (also known as CDP- diacylglycerol synthase) (CDS) is the enzyme that catalyzes the synthesis of CDP-diacylglycerol from cytidine triphosphate and phosphatidate.
CTP + phosphatidate ⇌ {\displaystyle \rightleftharpoons } diphosphate + CDP-diacylglycerol Thus, the two substrates of this enzyme are cytidine triphosphate, or CTP, and phosphatidate, whereas its two products are diphosphate and CDP-diacylglycerol. CDP-diacylglycerol is an important branch point intermediate in both prokaryotic and eukaryotic organisms. CDS is a membrane-bound enzyme. This enzyme belongs to the family of transferases, specifically those transferring phosphorus-containing nucleotide groups (nucleotidyltransferases). The systematic name of this enzyme class is CTP:phosphatidate cytidylyltransferase. Other names in common use include CDP diglyceride pyrophosphorylase, CDP-diacylglycerol synthase, CDP-diacylglyceride synthetase, cytidine diphosphoglyceride pyrophosphorylase, phosphatidate cytidyltransferase, phosphatidic acid cytidylyltransferase, CTP:1,2-diacylglycerophosphate-cytidyl transferase, CTP-diacylglycerol synthetase, DAG synthetase, and CDP-DG. This enzyme participates in glycerophospholipid metabolism and phosphatidylinositol signaling system.
References
Carter JR, Kennedy EP (1966). "Enzymatic synthesis of cytidine diphosphate diglyceride". Journal of Lipid Research. 7 (5): 678–83. doi:10.1016/S0022-2275(20)39250-6. PMID 4291255. McCaman RE, Finnerty WR (1968). "Biosynthesis of cytidine diphosphate-diglyceride by a particulate fracgion from Micrococcus cerificans". Journal of Biological Chemistry. 243 (19): 5074–80. doi:10.1016/S0021-9258(18)91993-9. PMID 5679981. Petzold GL, Agranoff BW (1967). "The biosynthesis of cytidine diphosphate diglyceride by embryonic chick brain". Journal of Biological Chemistry. 242 (6): 1187–91. doi:10.1016/S0021-9258(18)96162-4. PMID 6067194.
