The Enzyme Database

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Accepted name: 1,4-dihydroxy-2-naphthoyl-CoA synthase
Reaction: 4-(2-carboxyphenyl)-4-oxobutanoyl-CoA = 1,4-dihydroxy-2-naphthoyl-CoA + H2O
For diagram of vitamin-K biosynthesis, click here
Other name(s): naphthoate synthase; 1,4-dihydroxy-2-naphthoate synthase; dihydroxynaphthoate synthase; o-succinylbenzoyl-CoA 1,4-dihydroxy-2-naphthoate-lyase (cyclizing); MenB; o-succinylbenzoyl-CoA dehydratase (cyclizing)
Systematic name: 4-(2-carboxyphenyl)-4-oxobutanoyl-CoA dehydratase (cyclizing)
Comments: This enzyme is involved in the synthesis of 1,4-dihydroxy-2-naphthoate, a branch point metabolite leading to the biosynthesis of menaquinone (vitamin K2, in bacteria), phylloquinone (vitamin K1 in plants), and many plant pigments. The coenzyme A group is subsequently removed from the product by EC, 1,4-dihydroxy-2-naphthoyl-CoA hydrolase.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, PDB, CAS registry number: 61328-42-5
1.  Meganathan, R. and Bentley, R. Menaquinone (vitamin K2) biosynthesis: conversion of o-succinylbenzoic acid to 1,4-dihydroxy-2-naphthoic acid by Mycobacterium phlei enzymes. J. Bacteriol. 140 (1979) 92–98. [PMID: 500558]
2.  Kolkmann, R. and Leistner, E. 4-(2′-Carboxyphenyl)-4-oxobutyryl coenzyme A ester, an intermediate in vitamin K2 (menaquinone) biosynthesis. Z. Naturforsch. C: Sci. 42 (1987) 1207–1214. [PMID: 2966501]
3.  Johnson, T.W., Shen, G., Zybailov, B., Kolling, D., Reategui, R., Beauparlant, S., Vassiliev, I.R., Bryant, D.A., Jones, A.D., Golbeck, J.H. and Chitnis, P.R. Recruitment of a foreign quinone into the A(1) site of photosystem I. I. Genetic and physiological characterization of phylloquinone biosynthetic pathway mutants in Synechocystis sp. PCC 6803. J. Biol. Chem. 275 (2000) 8523–8530. [PMID: 10722690]
4.  Truglio, J.J., Theis, K., Feng, Y., Gajda, R., Machutta, C., Tonge, P.J. and Kisker, C. Crystal structure of Mycobacterium tuberculosis MenB, a key enzyme in vitamin K2 biosynthesis. J. Biol. Chem. 278 (2003) 42352–42360. [PMID: 12909628]
[EC created 1992, modified 2010]

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