2007
DOI: 10.1021/jf0628072
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Biotransformation of Sinapic Acid Catalyzed by Momordica charantia Peroxidase

Abstract: Biotransformation of sinapic acid (1) with H2O2/Momordica charantia peroxidase, which exists in the widely used food M. charantia, at pH 5.0, 43 degrees C, in the presence of acetone resulted in six compounds, including four new compounds. Compound 2 was the first isolation of a new unique sinapic acid tetrameric derivate, which is formed by peroxidase catalysis in vitro. Besides 2, three other new sinapic acid dimers, 3-5 have also been isolated. Their structures were established on the basis of spectroscopic… Show more

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Cited by 28 publications
(21 citation statements)
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References 23 publications
(45 reference statements)
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“…The coupling products of the free acids significantly differ from the products obtained from using esters as starting materials (Ward et al 2001). As hydroxycinnamic acids tend to decarboxylate under these conditions (Ward et al 2001;Liu et al 2005Liu et al , 2007a) the coupling products do not represent possible products in the plant cell wall where ferulic acid is ester-linked to cell wall polysaccharides. Esterification, however, protects ferulic acid from being decarboxylated during oxidative coupling.…”
Section: Dehydrodiferulatesmentioning
confidence: 95%
See 1 more Smart Citation
“…The coupling products of the free acids significantly differ from the products obtained from using esters as starting materials (Ward et al 2001). As hydroxycinnamic acids tend to decarboxylate under these conditions (Ward et al 2001;Liu et al 2005Liu et al , 2007a) the coupling products do not represent possible products in the plant cell wall where ferulic acid is ester-linked to cell wall polysaccharides. Esterification, however, protects ferulic acid from being decarboxylated during oxidative coupling.…”
Section: Dehydrodiferulatesmentioning
confidence: 95%
“…As already described for ferulate dehydrodimers, model reactions using the free acids as starting materials are only of limited value to describe processes in the plant cell wall, but might be of interest for other purposes such as demonstrating the detoxification of ferulic acid by fungi. In model reactions using the free acids, ferulic acid (1, R = H), p-coumaric acid (2, R = H), sinapic acid (3, R = H) and caffeic acid 15 were coupled by using different peroxidases and coupling conditions (Ward et al 2001;Liu et al 2005Liu et al , 2007a; Monien et al 2006). Kong's group used peroxidase from Momordica charantia and H 2 O 2 in a buffer (pH 5.0)/acetone mixture to oligomerize p-coumaric, caffeic, ferulic, and sinapic acid and described this in four publications (Liu et al 2005(Liu et al , 2007aWan et al 2008 (Ward et al 2001;Liu et al 2005).…”
Section: Ferulate Trimers and Tetramers From Model Reactionsmentioning
confidence: 99%
“…Similar products were also generated after oxidizing mixtures of CA, ferulic acid (FA), p-coumaric acid (CouA) and sinapic acid (SA) with potato and horseradish peroxidase (Arrieta-Baez and Stark 2006) and mixtures of FA and resveratrol with M. charantia peroxidase (Yu et al 2007). The latter enzyme source was used to produce SA tetramers as well (Liu et al 2007). In the same fashion, the first step in the cascade of reactions that could lead to a CA tetramer is the formation of CA radicals, as claimed for peroxidase-catalyzed oxidation of ferulic acid (Oudgenoeg et al 2001;Derat and Shaik 2006), (Fig.…”
Section: Oxidation Mechanismmentioning
confidence: 99%
“…Momordica charantia peroxidase (MCP) is an easily obtainable peroxidase from the fruits of M. charantia. MCP has several advantages including economical source, enzyme pH stability, and thermostability, compared to the widely used horseradish peroxidase [2]. MCP has been a useful tool to facilitate oxidative coupling of substrates for new compounds with possible pharmacological activities [3 -5].…”
mentioning
confidence: 99%