Analysis of metabolite profiles of Saccharomyces cerevisiae strains suitable for butanol production.

Analysis of metabolite profiles of Saccharomyces cerevisiae strains suitable for butanol production.

Azambuja, Suéllen P H;Teixeira, Gleidson S;Andrietta, Maria G S;Torres-Mayanga, Paulo C;Forster-Carneiro, Tânia;Rosa, Carlos A;Goldbeck, Rosana;
FEMS microbiology letters 2019 Vol. 366
197
azambuja2019analysisfems

Abstract

Butanol has advantages over ethanol as a biofuel. Although butanol is naturally produced by some Clostridium species, clostridial fermentation has inherent characteristics that prevent its industrial application. Butanol-producing Saccharomyces cerevisiae strains may be a solution to this problem. The aim of this study was to evaluate the ability of wild-type and industrial Brazilian strains of S. cerevisiae to produce n-butanol using glycine as co-substrate and evaluate the relationship between the production of this alcohol and other metabolites in fermented broth. Of the 48 strains analyzed, 25 were able to produce n-butanol in a glycine-containing medium. Strains exhibited different profiles of n-butanol, isobutanol, ethanol, glycerol and acetic acid production. Some wild-type strains showed substantial n-butanol production capability, for instance UFMG-CM-Y267, which produced about 12.7 mg/L of butanol. Although this concentration is low, it demonstrates that wild-type S. cerevisiae can synthesize butanol, suggesting that selection and genetic modification of this microorganism could yield promising results. The findings presented here may prove useful for future studies aimed at optimizing S. cerevisiae strains for butanol production.

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