IUBMB Enzyme Nomenclature


Accepted name: dTDP-4-dehydro-6-deoxy-α-D-gulose 4-ketoreductase

Reaction: dTDP-6-deoxy-α-D-allose + NAD(P)+ = dTDP-4-dehydro-6-deoxy-α-D-gulose + NAD(P)H + H+

For diagram of reaction, click here

Glossary: dTDP-4-dehydro-6-deoxy-α-D-gulose = dTDP-4-dehydro-6-deoxy-α-D-allose

Other name(s): dTDP-4-dehydro-6-deoxygulose reductase; tylD (gene name); gerKI (gene name); chmD (gene name); mydI (gene name)

Systematic name: dTDP-6-deoxy-α-D-allose:NAD(P)+ oxidoreductase

Comments: The enzyme forms an activated deoxy-α-D-allose, which is converted to mycinose after attachment to the aglycones of several macrolide antibiotics, including tylosin, chalcomycin, dihydrochalcomycin, and mycinamicin II.

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


1. Bate, N. and Cundliffe, E. The mycinose-biosynthetic genes of Streptomyces fradiae, producer of tylosin. J Ind Microbiol Biotechnol 23 (1999) 118-122. [PMID: 10510490]

2. Anzai, Y., Saito, N., Tanaka, M., Kinoshita, K., Koyama, Y. and Kato, F. Organization of the biosynthetic gene cluster for the polyketide macrolide mycinamicin in Micromonospora griseorubida. FEMS Microbiol. Lett. 218 (2003) 135-141. [PMID: 12583909]

3. Thuy, T.T., Liou, K., Oh, T.J., Kim, D.H., Nam, D.H., Yoo, J.C. and Sohng, J.K. Biosynthesis of dTDP-6-deoxy-β-D-allose, biochemical characterization of dTDP-4-keto-6-deoxyglucose reductase (GerKI) from Streptomyces sp. KCTC 0041BP. Glycobiology 17 (2007) 119-126. [PMID: 17053005]

4. Kubiak, R.L., Phillips, R.K., Zmudka, M.W., Ahn, M.R., Maka, E.M., Pyeatt, G.L., Roggensack, S.J. and Holden, H.M. Structural and functional studies on a 3′-epimerase involved in the biosynthesis of dTDP-6-deoxy-D-allose. Biochemistry 51 (2012) 9375-9383. [PMID: 23116432]

[EC created 2013]

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