ExplorEnz: EC 4.1.3.36

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4.1.3.36

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 3.1.2.28, 1,4-dihydroxy-2-naphthoyl-CoA hydrolase.

Links to other databases:

BRENDA, EXPASY, KEGG, MetaCyc, PDB, CAS registry number: 61328-42-5

References:

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. [DOI] [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. [DOI] [PMID: 12909628]

[EC 4.1.3.36 created 1992, modified 2010]