Accepted name: quinate dehydrogenase
Reaction: L-quinate + NAD+ = 3-dehydroquinate + NADH + H+
Glossary: quinate = (1R,3R,4R,5R)-1,3,4,5-tetrahydroxycyclohexanecarboxylic acid and is a cyclical carboxylate
The numbering system used for the 3-dehydroquinate is that of the recommendations on cyclitols, sections I-8 and I-9: and is shown in the reaction diagram. The use of the term ’5-dehydroquinate’ for this compound is based on an earlier system of numbering.
Other name(s): quinic dehydrogenase; quinate:NAD oxidoreductase; quinate 5-dehydrogenase; quinate:NAD+ 5-oxidoreductase
Systematic name: L-quinate:NAD+ 3-oxidoreductase
Comments: The enzyme is specific for quinate as substrate; phenylpyruvate, phenylalanine, cinnamate and shikimate will not act as substrates. NAD+ cannot be replaced by NADP+.
1.  Gamborg, O.L. Aromatic metabolism in plants. III. Quinate dehydrogenase from mung bean cell suspension cultures. Biochim. Biophys. Acta 128 (1966) 483–491.
2.  Mitsuhashi, S. and Davis, B.D. Aromatic biosynthesis. XIII. Conversion of quinic acid to 5-dehydroquinic acid by quinic dehydrogenase. Biochim. Biophys. Acta 15 (1954) 268–280. [PMID: 13208693]
[EC created 1961, modified 1976, modified 2004]

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