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Metabolic engineering of Saccharomyces cerevisiae for the synthesis of the wine-related antioxidant resveratrol.

Authors: Becker, J.; Armstrong, G.; van der Merwe, M.; Lambrechts, M.; Vivier, M.; Pretorius, I.;

Metabolic engineering of Saccharomyces cerevisiae for the synthesis of the wine-related antioxidant resveratrol.

Abstract

The stilbene resveratrol is a stress metabolite produced by Vitis vinifera grapevines during fungal infection, wounding or UV radiation. Resveratrol is synthesised particularly in the skins of grape berries and only trace amounts are present in the fruit flesh. Red wine contains a much higher resveratrol concentration than white wine, due to skin contact during fermentation. Apart from its antifungal characteristics, resveratrol has also been shown to have cancer chemopreventive activity and to reduce the risk of coronary heart disease. It acts as an antioxidant and anti-mutagen and has the ability to induce specific enzymes that metabolise carcinogenic substances. The objective of this pilot study was to investigate the feasibility of developing wine yeasts with the ability to produce resveratrol during fermentation in both red and white wines, thereby increasing the wholesomeness of the product. To achieve this goal, the phenylpropanoid pathway in Saccharomyces cerevisiae would have to be introduced to produce p-coumaroyl-CoA, one of the substrates required for resveratrol synthesis. The other substrate for resveratrol synthase, malonyl-CoA, is already found in yeast and is involved in de novo fatty-acid biosynthesis. We hypothesised that production of p-coumaroyl-CoA and resveratrol can be achieved by co-expressing the coenzyme-A ligase-encoding gene (4CL216) from a hybrid poplar and the grapevine resveratrol synthase gene (vst1) in laboratory strains of S. cerevisiae. This yeast has the ability to metabolise p-coumaric acid, a substance already present in grape must. This compound was therefore added to the synthetic media used for the growth of laboratory cultures. Transformants expressing both the 4CL216 and vst1 genes were obtained and tested for production of resveratrol. Following beta-glucosidase treatment of organic extracts for removal of glucose moieties that are typically bound to resveratrol, the results showed that the yeast transformants had produced the resveratrol beta-glucoside, piceid. This is the first report of the reconstruction of a biochemical pathway in a heterologous host to produce resveratrol.

Countries
South Africa, Australia
Related Organizations
Keywords

long chain fatty acid coenzyme A ligase, antioxidant activity, Wine, coenzyme A, resveratrol, 630, Antioxidants, resveratrol synthase, synthetase, piceid, Stilbenes, Vitis, fermentation, hybridization, Coenzyme-A ligase, article, feasibility study, unclassified drug, β-glucosidase, enzyme synthesis, hypothesis, Antioxidant, metabolic engineering, Populus berolinensis, 570, culture medium, organic compound, Wine yeast, Vitis sp, Saccharomyces cerevisiae, wine industry, Transformation, Saccharomyces, Transformation, Genetic, Genetic, Coenzyme A Ligases, controlled study, enzyme substrate, fatty acid synthesis, nonhuman, beta glucosidase, 4 coumaroyl coenzyme a, fungal strain, malonyl coenzyme A, Resveratrol, Stilbene, Vitis vinifera, gene expression, fatty acid, biosynthesis, Resveratrol synthase, Acyltransferases

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
154
Top 10%
Top 10%
Top 10%