The Enzyme Database

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EC 1.1.3.38     
Accepted name: vanillyl-alcohol oxidase
Reaction: vanillyl alcohol + O2 = vanillin + H2O2
Other name(s): 4-hydroxy-2-methoxybenzyl alcohol oxidase
Systematic name: vanillyl alcohol:oxygen oxidoreductase
Comments: Vanillyl-alcohol oxidase from Penicillium simplicissimum contains covalently bound FAD. It converts a wide range of 4-hydroxybenzyl alcohols and 4-hydroxybenzylamines into the corresponding aldehydes. The allyl group of 4-allylphenols is also converted into the -CH=CH-CH2OH group.
Links to other databases: BRENDA, EAWAG-BBD, EXPASY, KEGG, MetaCyc, PDB, CAS registry number: 143929-24-2
References:
1.  de Jong, E., van Berkel, W.J.H., van der Zwan, R.P. and de Bont, J.A.M. Purification and characterization of vanillyl-alcohol oxidase from Penicillium simplicissimum, a novel aromatic alcohol oxidase containing covalently bound FAD. Eur. J. Biochem. 208 (1992) 651–657. [DOI] [PMID: 1396672]
2.  Fraaije, M.W., Veeger, C. and van Berkel, W.J.H. Substrate specificity of flavin-dependent vanillyl-alcohol oxidase from Penicillium simplicissimum. Evidence for the production of 4-hydroxycinnamyl alcohols from 4-allylphenols. Eur. J. Biochem. 234 (1995) 271–277. [DOI] [PMID: 8529652]
[EC 1.1.3.38 created 1999]
 
 
EC 1.2.1.67     
Accepted name: vanillin dehydrogenase
Reaction: vanillin + NAD+ + H2O = vanillate + NADH + 2 H+
Glossary: vanillate = 4-hydroxy-3-methoxybenzoate
vanillin = 4-hydroxy-3-methoxybenzaldehyde
Systematic name: vanillin:NAD+ oxidoreductase
Links to other databases: BRENDA, EAWAG-BBD, EXPASY, KEGG, MetaCyc, CAS registry number: 189767-93-9
References:
1.  Pometto, A.L. and Crawford, D.L. Whole-cell bioconversion of vanillin to vanillic acid by Streptomyces viridosporus. Appl. Environ. Microbiol. 45 (1983) 1582–1585. [PMID: 6870241]
[EC 1.2.1.67 created 2000]
 
 
EC 1.2.3.9     
Accepted name: aryl-aldehyde oxidase
Reaction: an aromatic aldehyde + O2 + H2O = an aromatic carboxylate + H2O2
Systematic name: aryl-aldehyde:oxygen oxidoreductase
Comments: Acts on benzaldehyde, vanillin and a number of other aromatic aldehydes, but not on aliphatic aldehydes or sugars.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number: 82657-93-0
References:
1.  Crawford, D.L., Sutherland, J.B., Pometto, A.L., III and Miller, J.M. Production of an aromatic aldehyde oxidase by Streptomyces viridosporus. Arch. Microbiol. 131 (1982) 351–355.
[EC 1.2.3.9 created 1986, modified 2002]
 
 
EC 1.11.1.16     
Accepted name: versatile peroxidase
Reaction: (1) 1-(4-hydroxy-3-methoxyphenyl)-2-(2-methoxyphenoxy)propane-1,3-diol + H2O2 = 4-hydroxy-3-methoxybenzaldehyde + 2-methoxyphenol + glycolaldehyde + H2O
(2) 2 manganese(II) + 2 H+ + H2O2 = 2 manganese(III) + 2 H2O
Glossary: 4-hydroxy-3-methoxybenzaldehyde = vanillin
2-methoxyphenol = guaiacol
Other name(s): VP; hybrid peroxidase; polyvalent peroxidase; reactive-black-5:hydrogen-peroxide oxidoreductase
Systematic name: 1-(4-hydroxy-3-methoxyphenyl)-2-(2-methoxyphenoxy)propane-1,3-diol:hydrogen-peroxide oxidoreductase
Comments: A hemoprotein. This ligninolytic peroxidase combines the substrate-specificity characteristics of the two other ligninolytic peroxidases, EC 1.11.1.13, manganese peroxidase and EC 1.11.1.14, lignin peroxidase. Unlike these two enzymes, it is also able to oxidize phenols, hydroquinones and both low- and high-redox-potential dyes, due to a hybrid molecular architecture that involves multiple binding sites for substrates [2,4].
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, PDB, CAS registry number: 42613-30-9, 114995-15-2
References:
1.  Martínez, M.J., Ruiz-Dueñas, F.J., Guillén, F. and Martínez, A.T. Purification and catalytic properties of two manganese peroxidase isoenzymes from Pleurotus eryngii. Eur. J. Biochem. 237 (1996) 424–432. [DOI] [PMID: 8647081]
2.  Heinfling, A., Ruiz-Dueñas, F.J., Martínez, M.J., Bergbauer, M., Szewzyk, U. and Martínez, A.T. A study on reducing substrates of manganese-oxidizing peroxidases from Pleurotus eryngii and Bjerkandera adusta. FEBS Lett. 428 (1998) 141–146. [DOI] [PMID: 9654123]
3.  Ruiz-Dueñas, F.J., Martínez, M.J. and Martínez, A.T. Molecular characterization of a novel peroxidase isolated from the ligninolytic fungus Pleurotus eryngii. Mol. Microbiol. 31 (1999) 223–235. [DOI] [PMID: 9987124]
4.  Camarero, S., Sarkar, S., Ruiz-Dueñas, F.J., Martínez, M.J. and Martínez, A.T. Description of a versatile peroxidase involved in the natural degradation of lignin that has both manganese peroxidase and lignin peroxidase substrate interaction sites. J. Biol. Chem. 274 (1999) 10324–10330. [DOI] [PMID: 10187820]
5.  Ruiz-Dueñas, F.J., Martínez, M.J. and Martínez, A.T. Heterologous expression of Pleurotus eryngii peroxidase confirms its ability to oxidize Mn2+ and different aromatic substrates. Appl. Environ. Microbiol. 65 (1999) 4705–4707. [PMID: 10508113]
6.  Camarero, S., Ruiz-Dueñas, F.J., Sarkar, S., Martínez, M.J. and Martínez, A.T. The cloning of a new peroxidase found in lignocellulose cultures of Pleurotus eryngii and sequence comparison with other fungal peroxidases. FEMS Microbiol. Lett. 191 (2000) 37–43. [DOI] [PMID: 11004397]
7.  Ruiz-Dueñas, F.J., Camarero, S., Pérez-Boada, M., Martínez, M.J. and Martínez, A.T. A new versatile peroxidase from Pleurotus. Biochem. Soc. Trans. 29 (2001) 116–122. [PMID: 11356138]
8.  Banci, L., Camarero, S., Martínez, A.T., Martínez, M.J., Pérez-Boada, M., Pierattelli, R. and Ruiz-Dueñas, F.J. NMR study of manganese(II) binding by a new versatile peroxidase from the white-rot fungus Pleurotus eryngii. J. Biol. Inorg. Chem. 8 (2003) 751–760. [DOI] [PMID: 12884090]
9.  Pérez-Boada, M., Ruiz-Dueñas, F.J., Pogni, R., Basosi, R., Choinowski, T., Martínez, M.J., Piontek, K. and Martínez, A.T. Versatile peroxidase oxidation of high redox potential aromatic compounds: site-directed mutagenesis, spectroscopic and crystallographic investigation of three long-range electron transfer pathways. J. Mol. Biol. 354 (2005) 385–402. [DOI] [PMID: 16246366]
10.  Caramelo, L., Martínez, M.J. and Martínez, A.T. A search for ligninolytic peroxidases in the fungus Pleurotus eryngii involving α-keto-γ-thiomethylbutyric acid and lignin model dimer. Appl. Environ. Microbiol. 65 (1999) 916–922. [PMID: 10049842]
[EC 1.11.1.16 created 2006, modified 2016]
 
 
EC 1.13.11.43     
Accepted name: lignostilbene αβ-dioxygenase
Reaction: 1,2-bis(4-hydroxy-3-methoxyphenyl)ethylene + O2 = 2 vanillin
Systematic name: 1,2-bis(4-hydroxy-3-methoxyphenyl)ethylene:oxygen oxidoreductase (αβ-bond-cleaving)
Comments: An iron protein. The enzyme catalyses oxidative cleavage of the interphenyl double bond in the synthetic substrate and lignin-derived stilbenes. It is responsible for the degradation of a diarylpropane-type structure in lignin.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, PDB, CAS registry number: 124834-28-2
References:
1.  Kamoda, S., Habu, N., Samejima, M. and Yoshimoto, T. Purification and some properties of lignostilbene-αβ- dioxygenase responsible for the Cα-Cβ cleavage of a diarylpropane type lignin model-compound from Pseudomonas sp TMY1009. Agric. Biol. Chem. 53 (1989) 2757–2761.
[EC 1.13.11.43 created 1992]
 
 
EC 1.13.11.88     
Accepted name: isoeugenol monooxygenase
Reaction: isoeugenol + O2 = vanillin + acetaldehyde
For diagram of anethole, chavicol, eugenol and isoeugenol biosynthesis, click here
Glossary: isoeugenol = 2-methoxy-4-(prop-1-en-1-yl)phenol
Other name(s): iem (gene name)
Systematic name: isoeugenol:oxygen 7,8-oxidoreductase (bond-cleaving)
Comments: Contains iron(II). The enzyme, charcterised from the bacteria Pseudomonas putida and Pseudomonas nitroreducens, catalyses the epoxidation of the double bond in the side chain of isoeugenol, followed by a second oxygenation and cleavage of the side chain in the form of acetaldehyde.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc
References:
1.  Shimoni, E., Ravid, U. and Shoham, Y. Isolation of a Bacillus sp. capable of transforming isoeugenol to vanillin. J. Biotechnol. 78 (2000) 1–9. [PMID: 10702906]
2.  Yamada, M., Okada, Y., Yoshida, T. and Nagasawa, T. Biotransformation of isoeugenol to vanillin by Pseudomonas putida IE27 cells. Appl. Microbiol. Biotechnol. 73 (2007) 1025–1030. [PMID: 16944125]
3.  Yamada, M., Okada, Y., Yoshida, T. and Nagasawa, T. Purification, characterization and gene cloning of isoeugenol-degrading enzyme from Pseudomonas putida IE27. Arch. Microbiol. 187 (2007) 511–517. [PMID: 17516050]
4.  Ryu, J.Y., Seo, J., Unno, T., Ahn, J.H., Yan, T., Sadowsky, M.J. and Hur, H.G. Isoeugenol monooxygenase and its putative regulatory gene are located in the eugenol metabolic gene cluster in Pseudomonas nitroreducens Jin1. Arch. Microbiol. 192 (2010) 201–209. [PMID: 20091296]
5.  Ryu, J.Y., Seo, J., Park, S., Ahn, J.H., Chong, Y., Sadowsky, M.J. and Hur, H.G. Characterization of an isoeugenol monooxygenase (iem) from Pseudomonas nitroreducens Jin1 that transforms isoeugenol to vanillin. Biosci. Biotechnol. Biochem. 77 (2013) 289–294. [PMID: 23391906]
[EC 1.13.11.88 created 2019]
 
 
EC 1.14.13.82     
Accepted name: vanillate monooxygenase
Reaction: vanillate + O2 + NADH + H+ = 3,4-dihydroxybenzoate + NAD+ + H2O + formaldehyde
Glossary: vanillate = 4-hydroxy-3-methoxybenzoate
Other name(s): 4-hydroxy-3-methoxybenzoate demethylase; vanillate demethylase
Systematic name: vanillate:oxygen oxidoreductase (demethylating)
Comments: Forms part of the vanillin degradation pathway in Arthrobacter sp.
Links to other databases: BRENDA, EAWAG-BBD, EXPASY, KEGG, MetaCyc, CAS registry number: 39307-11-4
References:
1.  Brunel, F. and Davison, J. Cloning and sequencing of Pseudomonas genes encoding vanillate demethylase. J. Bacteriol. 170 (1988) 4924–4930. [DOI] [PMID: 3170489]
2.  Priefert, H., Rabenhorst, J. and Steinbuchel, A. Molecular characterization of genes of Pseudomonas sp. strain HR199 involved in bioconversion of vanillin to protocatechuate. J. Bacteriol. 179 (1997) 2595–2607. [DOI] [PMID: 9098058]
[EC 1.14.13.82 created 2000 as EC 1.2.3.12, transferred 2003 to EC 1.14.13.82]
 
 
EC 2.4.1.136     
Accepted name: gallate 1-β-glucosyltransferase
Reaction: UDP-glucose + gallate = UDP + 1-galloyl-β-D-glucose
Other name(s): UDP-glucose—vanillate 1-glucosyltransferase; UDPglucose:vanillate 1-O-glucosyltransferase; UDPglucose:gallate glucosyltransferase
Systematic name: UDP-glucose:gallate β-D-glucosyltransferase
Comments: A number of substituted benzoic acids and, more slowly, cinnamic acids, can act as acceptors. Vanillin is the best acceptor investigated.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number: 89700-30-1
References:
1.  Gross, G.G. Synthesis of β-glucogallin from UDP-glucose and gallic acid by an enzyme preparation from oak leaves. FEBS Lett. 148 (1982) 67–70.
2.  Gross, G.G. Partial-purification and properties of UDP-glucose-vanillate 1-O-glucosyl transferase from oak leaves. Phytochemistry 22 (1983) 2179–2182.
[EC 2.4.1.136 created 1984]
 
 
EC 2.6.1.119     
Accepted name: vanillin aminotransferase
Reaction: L-alanine + vanillin = pyruvate + vanillylamine
Other name(s): VAMT (gene name)
Systematic name: L-alanine:vanillin aminotransferase
Comments: The enzyme participates in the biosynthesis of capsaicinoids in pungent cultivars of Capsicum sp. In vivo it has only been assayed in the reverse direction, where the preferred amino group acceptors were found to be pyruvate and oxaloacetate.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc
References:
1.  Curry, J., Aluru, M., Mendoza, M., Nevarez, J., Melendrez, M. and O'Connell, M.A. Transcripts for possible capsaicinoid biosynthetic genes are differentially accumulated in pungent and non-pungent Capsicum spp. Plant Sci. 148 (1999) 47–57.
2.  del Rosario Abraham-Juarez, M., del Carmen Rocha-Granados, M., Lopez, M.G., Rivera-Bustamante, R.F. and Ochoa-Alejo, N. Virus-induced silencing of Comt, pAmt and Kas genes results in a reduction of capsaicinoid accumulation in chili pepper fruits. Planta 227 (2008) 681–695. [PMID: 17999078]
3.  Lang, Y., Kisaka, H., Sugiyama, R., Nomura, K., Morita, A., Watanabe, T., Tanaka, Y., Yazawa, S. and Miwa, T. Functional loss of pAMT results in biosynthesis of capsinoids, capsaicinoid analogs, in Capsicum annuum cv. CH-19 Sweet. Plant J. 59 (2009) 953–961. [PMID: 19473323]
4.  Gururaj, H.B., Padma, M.N., Giridhar, P. and Ravishankar, G.A. Functional validation of Capsicum frutescens aminotransferase gene involved in vanillylamine biosynthesis using Agrobacterium mediated genetic transformation studies in Nicotiana tabacum and Capsicum frutescens calli cultures. Plant Sci. 195 (2012) 96–105. [PMID: 22921003]
5.  Weber, N., Ismail, A., Gorwa-Grauslund, M. and Carlquist, M. Biocatalytic potential of vanillin aminotransferase from Capsicum chinense. BMC Biotechnol 14:25 (2014). [PMID: 24712445]
[EC 2.6.1.119 created 2020]
 
 
EC 4.1.2.41      
Transferred entry: vanillin synthase. Now included with EC 4.1.2.61, feruloyl-CoA hydratase/lyase
[EC 4.1.2.41 created 2000, deleted 2019]
 
 
EC 4.1.2.61     
Accepted name: feruloyl-CoA hydratase/lyase
Reaction: feruloyl-CoA + H2O = vanillin + acetyl-CoA (overall reaction)
(1a) feruloyl-CoA + H2O = 3-hydroxy-3-(4-hydroxy-3-methoxyphenyl)propanoyl-CoA
(1b) 3-hydroxy-3-(4-hydroxy-3-methoxyphenyl)propanoyl-CoA = vanillin + acetyl-CoA
Other name(s): hydroxycinnamoyl-CoA hydratase lyase; enoyl-CoA hydratase/aldolase; HCHL; ferB (gene name); couA (gene name)
Systematic name: feruloyl-CoA hydro-lyase/vanillin-lyase (acetyl-CoA-forming)
Comments: The enzyme is a member of the enoyl-CoA hydratase/isomerase superfamily. It catalyses a two-step process involving first the hydration of the double bond of feruloyl-CoA and then the cleavage of the resultant β-hydroxy thioester by retro-aldol reaction. (E)-caffeoyl-CoA and (E)-4-coumaroyl-CoA are also substrates.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, PDB
References:
1.  Pometto, A.L. and Crawford, D.L. Whole-cell bioconversion of vanillin to vanillic acid by Streptomyces viridosporus. Appl. Environ. Microbiol. 45 (1983) 1582–1585. [PMID: 6870241]
2.  Narbad, A. and Gasson, M.J. Metabolism of ferulic acid via vanillin using a novel CoA-dependent pathway in a newly-isolated strain of Pseudomonas fluorescens. Microbiology 144 (1998) 1397–1405. [DOI] [PMID: 9611814]
3.  Gasson, M.J., Kitamura, Y., McLauchlan, W.R., Narbad, A., Parr, A.J., Parsons, E.L., Payne, J., Rhodes, M.J. and Walton, N.J. Metabolism of ferulic acid to vanillin. A bacterial gene of the enoyl-SCoA hydratase/isomerase superfamily encodes an enzyme for the hydration and cleavage of a hydroxycinnamic acid SCoA thioester. J. Biol. Chem. 273 (1998) 4163–4170. [PMID: 9461612]
4.  Overhage, J., Priefert, H. and Steinbuchel, A. Biochemical and genetic analyses of ferulic acid catabolism in Pseudomonas sp. Strain HR199. Appl. Environ. Microbiol. 65 (1999) 4837–4847. [PMID: 10543794]
5.  Bennett, J.P., Bertin, L., Moulton, B., Fairlamb, I.J., Brzozowski, A.M., Walton, N.J. and Grogan, G. A ternary complex of hydroxycinnamoyl-CoA hydratase-lyase (HCHL) with acetyl-CoA and vanillin gives insights into substrate specificity and mechanism. Biochem. J. 414 (2008) 281–289. [PMID: 18479250]
6.  Hirakawa, H., Schaefer, A.L., Greenberg, E.P. and Harwood, C.S. Anaerobic p-coumarate degradation by Rhodopseudomonas palustris and identification of CouR, a MarR repressor protein that binds p-coumaroyl coenzyme A. J. Bacteriol. 194 (2012) 1960–1967. [PMID: 22328668]
7.  Yang, W., Tang, H., Ni, J., Wu, Q., Hua, D., Tao, F. and Xu, P. Characterization of two Streptomyces enzymes that convert ferulic acid to vanillin. PLoS One 8:e67339 (2013). [PMID: 23840666]
[EC 4.1.2.61 created 2020 (EC 4.1.2.41 created 2000, incorporated 2020, EC 4.2.1.101 created 2000, incorporated 2020)]
 
 
EC 4.1.2.65     
Accepted name: ferulate hydratase/lyase
Reaction: ferulate + H2O = vanillin + acetate (overall reaction)
(1a) ferulate + H2O = 3-hydroxy-3-(4-hydroxy-3-methoxyphenyl)propanoate
(1b) 3-hydroxy-3-(4-hydroxy-3-methoxyphenyl)propanoate = vanillin + acetate
Glossary: ferulate = 4-hydroxy-3-methoxycinnamate
vanillin = 4-hydroxy-3-methoxybenzaldehyde
Other name(s): vanillin synthase; VpVan; VAN; ferulate aldolase
Systematic name: ferulate acetate-lyase (vanillin-forming)
Comments: The enzyme is located in the chloroplasts of vanilla pods of the orchid Vanilla planifolia. It also converts ferulic acid 4-O-β-D-glucopyranoside to vanillin 4-O-β-D-glucopyranoside.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc
References:
1.  Gallage, N.J., Hansen, E.H., Kannangara, R., Olsen, C.E., Motawia, M.S., Jørgensen, K., Holme, I., Hebelstrup, K., Grisoni, M. and Møller, B.L. Vanillin formation from ferulic acid in Vanilla planifolia is catalysed by a single enzyme. Nat. Commun. 5:4037 (2014). [DOI] [PMID: 24941968]
2.  Kundu, A. Vanillin biosynthetic pathways in plants. Planta 245 (2017) 1069–1078. [DOI] [PMID: 28357540]
3.  Gallage, N.J., Jørgensen, K., Janfelt, C., Nielsen, A.JZ., Naake, T., Dunski, E., Dalsten, L., Grisoni, M. and Møller, B.L. The intracellular localization of the vanillin biosynthetic machinery in pods of Vanilla planifolia. Plant Cell Physiol. 59 (2018) 304–318. [DOI] [PMID: 29186560]
[EC 4.1.2.65 created 2024]
 
 
EC 4.2.1.101      
Transferred entry: trans-feruloyl-CoA hydratase. Now included with EC 4.1.2.61, feruloyl-CoA hydratase/lyase
[EC 4.2.1.101 created 2000, deleted 2020]
 
 
EC 6.2.1.34     
Accepted name: trans-feruloyl-CoA synthase
Reaction: ferulic acid + CoA + ATP = feruloyl-CoA + products of ATP breakdown
For diagram of reaction, click here
Other name(s): trans-feruloyl-CoA synthetase; trans-ferulate:CoASH ligase (ATP-hydrolysing); ferulate:CoASH ligase (ATP-hydrolysing)
Systematic name: ferulate:CoA ligase (ATP-hydrolysing)
Comments: Requires Mg2+. It has not yet been established whether AMP + diphosphate or ADP + phosphate are formed in this reaction.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc
References:
1.  Narbad, A. and Gasson, M.J. Metabolism of ferulic acid via vanillin using a novel CoA-dependent pathway in a newly-isolated strain of Pseudomonas fluorescens. Microbiology 144 (1998) 1397–1405. [DOI] [PMID: 9611814]
2.  Pometto, A.L. and Crawford, D.L. Whole-cell bioconversion of vanillin to vanillic acid by Streptomyces viridosporus. Appl. Environ. Microbiol. 45 (1983) 1582–1585. [PMID: 6870241]
[EC 6.2.1.34 created 2000]
 
 


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