IUBMB Enzyme Nomenclature


Accepted name: 3-deoxy-D-glycero-D-galacto-nononate cytidylyltransferase

Reaction: CTP + 3-deoxy-D-glycero-D-galacto-non-2-ulopyranosonate = diphosphate + CMP-3-deoxy-D-glycero-D-galacto-non-2-ulopyranosonate

Systematic name: CTP:3-deoxy-D-glycero-D-galacto-nononate cytidylyltransferase

Comments: The enzyme is part of the biosynthesis pathway of the sialic acid 3-deoxy-D-glycero-D-galacto-nononate (Kdn). Kdn is abundant in extracellular glycoconjugates of lower vertebrates such as fish and amphibians, but is also found in the capsular polysaccharides of bacteria that belong to the Bacteroides genus.

Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number:


1. Terada, T., Kitazume, S., Kitajima, K., Inoue, S., Ito, F., Troy, F.A. and Inoue, Y. Synthesis of CMP-deaminoneuraminic acid (CMP-KDN) using the CTP:CMP-3-deoxynonulosonate cytidylyltransferase from rainbow trout testis. Identification and characterization of a CMP-KDN synthetase. J. Biol. Chem. 268 (1993) 2640-2648. [PMID: 8381411]

2. Terada, T., Kitajima, K., Inoue, S., Koppert, K., Brossmer, R. and Inoue, Y. Substrate specificity of rainbow trout testis CMP-3-deoxy-D-glycero-D-galacto-nonulosonic acid (CMP-Kdn) synthetase: kinetic studies of the reaction of natural and synthetic analogues of nonulosonic acid catalyzed by CMP-Kdn synthetase. Eur. J. Biochem. 236 (1996) 852-855. [PMID: 8665905]

3. Nakata, D., Munster, A.K., Gerardy-Schahn, R., Aoki, N., Matsuda, T. and Kitajima, K. Molecular cloning of a unique CMP-sialic acid synthetase that effectively utilizes both deaminoneuraminic acid (KDN) and N-acetylneuraminic acid (Neu5Ac) as substrates. Glycobiology 11 (2001) 685-692. [PMID: 11479279]

4. Tiralongo, J., Fujita, A., Sato, C., Kitajima, K., Lehmann, F., Oschlies, M., Gerardy-Schahn, R. and Munster-Kuhnel, A.K. The rainbow trout CMP-sialic acid synthetase utilises a nuclear localization signal different from that identified in the mouse enzyme. Glycobiology 17 (2007) 945-954. [PMID: 17580313]

5. Wang, L., Lu, Z., Allen, K.N., Mariano, P.S. and Dunaway-Mariano, D. Human symbiont Bacteroides thetaiotaomicron synthesizes 2-keto-3-deoxy-D-glycero-D-galacto-nononic acid (KDN). Chem. Biol. 15 (2008) 893-897. [PMID: 18804026]

[EC created 2016]

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