IUBMB Enzyme Nomenclature


Accepted name: UDP-N-acetylglucosamine 4,6-dehydratase (configuration-retaining)

Reaction: UDP-N-acetyl-α-D-glucosamine = UDP-2-acetamido-2,6-dideoxy-α-D-xylo-hex-4-ulose + H2O

For diagram of reaction click here and mechanism click here.

Glossary: N,N'-diacetylbacillosamine = 2,4-diacetamido-2,4,6-trideoxy-α-D-glucopyranose

Other name(s): PglF

Systematic name: UDP-N-acetyl-α-D-glucosamine hydro-lyase (configuration-retaining; UDP-2-acetamido-2,6-dideoxy-α-D-xylo-hex-4-ulose-forming)

Comments: Contains NAD+ as a cofactor [2]. This is the first enzyme in the biosynthetic pathway of N,N'-diacetylbacillosamine [1], the first carbohydrate in the glycoprotein N-linked heptasaccharide in Campylobacter jejuni. This enzyme belongs to the short-chain dehydrogenase/reductase family of enzymes.

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


1. Schoenhofen, I.C., McNally, D.J., Vinogradov, E., Whitfield, D., Young, N.M., Dick, S., Wakarchuk, W.W., Brisson, J.R. and Logan, S.M. Functional characterization of dehydratase/aminotransferase pairs from Helicobacter and Campylobacter: enzymes distinguishing the pseudaminic acid and bacillosamine biosynthetic pathways. J. Biol. Chem. 281 (2006) 723-732. [PMID: 16286454]

2. Olivier, N.B., Chen, M.M., Behr, J.R. and Imperiali, B. In vitro biosynthesis of UDP-N,N'-diacetylbacillosamine by enzymes of the Campylobacter jejuni general protein glycosylation system. Biochemistry 45 (2006) 13659-13669. [PMID: 17087520]

[EC created 2012]

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