| EC |
1.2.1.85 |
| Accepted name: |
2-hydroxymuconate-6-semialdehyde dehydrogenase |
| Reaction: |
2-hydroxymuconate-6-semialdehyde + NAD+ + H2O = (2Z,4E)-2-hydroxyhexa-2,4-dienedioate + NADH + 2 H+ |
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For diagram of catechol catabolism (meta ring cleavage), click here |
| Glossary: |
2-hydroxymuconate-6-semialdehyde = (2Z,4E)-2-hydroxy-6-oxohexa-2,4-dienoate |
| Other name(s): |
xylG (gene name); praB (gene name) |
| Systematic name: |
2-hydroxymuconate-6-semialdehyde:NAD+ oxidoreductase |
| Comments: |
This substrate for this enzyme is formed by meta ring cleavage of catechol (EC 1.13.11.2, catechol 2,3-dioxygenase), and is an intermediate in the bacterial degradation of several aromatic compounds. Has lower activity with benzaldehyde [1]. Activity with NAD+ is more than 10-fold higher than with NADP+ [3]. cf. EC 1.2.1.32, aminomuconate-semialdehyde dehydrogenase. |
| Links to other databases: |
BRENDA, EXPASY, Gene, KEGG, MetaCyc |
| References: |
| 1. |
Inoue, J., Shaw, J.P., Rekik, M. and Harayama, S. Overlapping substrate specificities of benzaldehyde dehydrogenase (the xylC gene product) and 2-hydroxymuconic semialdehyde dehydrogenase (the xylG gene product) encoded by TOL plasmid pWW0 of Pseudomonas putida. J. Bacteriol. 177 (1995) 1196–1201. [DOI] [PMID: 7868591] |
| 2. |
Orii, C., Takenaka, S., Murakami, S. and Aoki, K. Metabolism of 4-amino-3-hydroxybenzoic acid by Bordetella sp. strain 10d: A different modified meta-cleavage pathway for 2-aminophenols. Biosci. Biotechnol. Biochem. 70 (2006) 2653–2661. [DOI] [PMID: 17090920] |
| 3. |
Kasai, D., Fujinami, T., Abe, T., Mase, K., Katayama, Y., Fukuda, M. and Masai, E. Uncovering the protocatechuate 2,3-cleavage pathway genes. J. Bacteriol. 191 (2009) 6758–6768. [DOI] [PMID: 19717587] |
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| [EC 1.2.1.85 created 2012] |
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