Exploring fermentative metabolic response to varying exogenous supplies of redox cofactor precursors in selected wine yeast species

The use of non-Saccharomyces yeasts in winemaking is gaining traction due to their specific phenotypes of technological interest, including their unique profile of central carbon metabolites and volatile compounds. However, the lack of knowledge about their physiology hinders their industrial exploi...

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Bibliographic Details
Published in:FEMS yeast research 2024-01, Vol.24
Main Authors: Tyibilika, Viwe, Setati, Mathabatha E, Bloem, Audrey, Divol, Benoit, Camarasa, Carole
Format: Article
Language:English
Subjects:
Coenzymes - metabolism
Fermentation
NAD - metabolism
NADP - metabolism
Niacin - metabolism
Oxidation-Reduction
Saccharomyces cerevisiae - metabolism
Thiamine - metabolism
Wine - analysis
Wine - microbiology
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Summary:The use of non-Saccharomyces yeasts in winemaking is gaining traction due to their specific phenotypes of technological interest, including their unique profile of central carbon metabolites and volatile compounds. However, the lack of knowledge about their physiology hinders their industrial exploitation. The intracellular redox status, involving NAD/NADH and NADP/NADPH cofactors, is a key driver of yeast activity during fermentation, notably directing the formation of metabolites that contribute to the wine bouquet. The biosynthesis of these cofactors can be modulated by the availability of their precursors, nicotinic acid and tryptophan, and their ratio by that of thiamine. In this study, a multifactorial experiment was designed to assess the effects of these three nutrients and their interactions on the metabolic response of various wine yeast species. The data indicated that limiting concentrations of nicotinic acid led to a species-dependent decrease in intracellular NAD(H) concentrations, resulting in variations of fermentation performance and production of metabolic sinks. Thiamine limitation did not directly affect redox cofactor concentrations or balance, but influenced redox management and subsequently the production of metabolites. Overall, this study identified nicotinic acid and thiamine as key factors to consider for species-specific modulation of the metabolic footprint of wine yeasts.
ISSN:1567-1364
1567-1364
DOI:10.1093/femsyr/foae029