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Updated: Nov 22, 2025
14:53
Techniques for the Evolution of Robust Pentose-fermenting Yeast for Bioconversion of Lignocellulose to Ethanol
Published on: October 24, 2016
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Ethanol production process driving changes on industrial strains.
Sheila Tiemi Nagamatsu1,2, Natalia Coutouné3, Juliana José2
1Division of Human Genetics, Department of Psychiatry, Yale School of Medicine, 333 Cedar St, New Haven, CT, 06510, USA.
FEMS Yeast Research
|January 8, 2021
Summary
Industrial yeast genomes adapted to specific ethanol production environments. Sugarcane fermentation favored stress response genes, while corn fermentation highlighted membrane modeling genes, guiding future strain development.
Area of Science:
- Biotechnology
- Microbial Genomics
- Biofuel Production
Background:
- Ethanol production varies significantly between Brazil and the USA due to feedstock and fermentation conditions.
- These differences likely drove genome adaptations in Saccharomyces cerevisiae strains used industrially.
- Understanding these adaptations is crucial for optimizing biofuel production.
Purpose of the Study:
- To compare genomes of industrial yeast strains from sugarcane and corn fermentation.
- To identify specific genomic adaptations related to different industrial ethanol production processes.
- To provide insights for selecting and engineering yeast strains for enhanced biofuel production.
Main Methods:
- Genome prediction and analysis of industrial and laboratory Saccharomyces cerevisiae strains.
- Selection of 4524 single-copy orthologous genes for phylogenetic tree construction.
- Comparative genomic analysis to identify evolutionary drivers and specific gene adaptations.
Main Results:
- Geographic location and industrial process were key evolutionary drivers for yeast adaptation.
- Sugarcane fermentation strains showed positive selection in metal homeostasis and stress response genes.
- Corn fermentation strains exhibited adaptations in membrane modeling genes, with Ethanol Red overexpressing the MAL31 maltose transporter gene.
Conclusions:
- Yeast genomes adapt to specific industrial ethanol production environments.
- Identified genetic adaptations can guide the selection of robust yeast chassis for biofuel and industrial applications.
- This research aids in developing improved strains for sustainable biofuel production.
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