ExplorEnz: EC 1.1.5.8

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1.1.5.8

Accepted name:

quinate/shikimate dehydrogenase (quinone)

Reaction:

quinate + quinone = 3-dehydroquinate + quinol

For diagram of shikimate and chorismate biosynthesis, click here

Glossary:

quinate = (1R,3R,4R,5R)-1,3,4,5-tetrahydroxycyclohexanecarboxylic acid and is a cyclitol 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):

NAD(P)⁺-independent quinate dehydrogenase; quinate:pyrroloquinoline-quinone 5-oxidoreductase; quinate dehydrogenase (quinone)

Systematic name:

quinate:quinol 3-oxidoreductase

Comments:

The enzyme is membrane-bound. Does not use NAD(P)⁺ as acceptor. Contains pyrroloquinoline-quinone. cf. EC 1.1.1.24, quinate/shikimate dehydrogenase (NAD⁺), EC 1.1.1.282, quinate/shikimate dehydrogenase [NAD(P)⁺], and EC 1.1.1.25, shikimate dehydrogenase (NADP⁺).

Links to other databases:

BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number: 115299-99-5

References:

1.	van Kleef, M.A.G. and Duine, J.A. Bacterial NAD(P)-independent quinate dehydrogenase is a quinoprotein. Arch. Microbiol. 150 (1988) 32–36. [PMID: 3044290]
2.	Adachi, O., Tanasupawat, S., Yoshihara, N., Toyama, H. and Matsushita, K. 3-Dehydroquinate production by oxidative fermentation and further conversion of 3-dehydroquinate to the intermediates in the shikimate pathway. Biosci. Biotechnol. Biochem. 67 (2003) 2124–2131. [DOI] [PMID: 14586099]
3.	Vangnai, A.S., Toyama, H., De-Eknamkul, W., Yoshihara, N., Adachi, O. and Matsushita, K. Quinate oxidation in Gluconobacter oxydans IFO3244: purification and characterization of quinoprotein quinate dehydrogenase. FEMS Microbiol. Lett. 241 (2004) 157–162. [DOI] [PMID: 15598527]

[EC 1.1.5.8 created 1992 as EC 1.1.99.25, modified 2004, transferred 2010 to EC 1.1.5.8, modified 2021]