Cited by 227Microbial Metabolic Engineering and BioproductionFungal and yeast genetics researchBiofuel production and bioconversion

Directed Evolution of Pyruvate Decarboxylase-Negative Saccharomyces cerevisiae , Yielding a C 2 -Independent, Glucose-Tolerant, and Pyruvate-Hyperproducing Yeast

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van Maris, Antonius J. A., Geertman, Jan-Maarten A., Vermeulen, Alexander, Groothuizen, Matthijs K., Winkler, Aaron A., Piper, Matthew D. W., van Dijken, Johannes P., Pronk, Jack T.·2004·Applied and Environmental Microbiology

Abstract

The absence of alcoholic fermentation makes pyruvate decarboxylase-negative (Pdc − ) strains of Saccharomyces cerevisiae an interesting platform for further metabolic engineering of central metabolism. However, Pdc − S. cerevisiae strains have two growth defects: (i) growth on synthetic medium in glucose-limited chemostat cultures requires the addition of small amounts of ethanol or acetate and (ii) even in the presence of a C 2 compound, these strains cannot grow in batch cultures on synthetic medium with glucose. We used two subsequent phenotypic selection strategies to obtain a Pdc − strain without these growth defects. An acetate-independent Pdc − mutant was obtained via (otherwise) glucose-limited chemostat cultivation by progressively lowering the acetate content in the feed. Transcriptome analysis did not reveal the mechanisms behind the C 2 independence. Further selection for glucose tolerance in shake flasks resulted in a Pdc − S. cerevisiae mutant (TAM) that could grow in batch cultures (μ max = 0.20 h −1 ) on synthetic medium, with glucose as the sole carbon source. Although the exact molecular mechanisms underlying the glucose-tolerant phenotype were not resolved, transcriptome analysis of the TAM strain revealed increased transcript levels of many glucose-repressible genes relative to the isogenic wild type in nitrogen-limited chemostat cultures with excess glucose. In pH-controlled aerobic batch cultures, the TAM strain produced large amounts of pyruvate. By repeated glucose feeding, a pyruvate concentration of 135 g liter −1 was obtained, with a specific pyruvate production rate of 6 to 7 mmol g of biomass −1 h −1 during the exponential-growth phase and an overall yield of 0.54 g of pyruvate g of glucose −1 .

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Crossref · 10.1128/aem.70.1.159-166.2004

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  • Adaptive changes towards ethanol tolerance in E. coli were linked to the up-regulation of oxyR and nrdR, indicating major changes in the cellular respiratory system and changes in amino acid metabolism.

    “Adaptive changes towards ethanol tolerance were linked to the up-regulation of oxyR and nrdR, indicating major changes in the cellular respiratory system but also changes in amino acid metabolism [85].”
  • Changes in enterobactin biosynthetic processes (ent genes) were observed in independent E. coli studies.

    “Furthermore, changes in enterobactin biosynthetic processes (ent genes) were also observed in independent studies [84,85,91].”

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Authors
van Maris, A. J. A., Geertman, J.-M. A., Vermeulen, A., Groothuizen, M. K., Winkler, A. A., Piper, M. D. W., van Dijken, J. P., & Pronk, J. T.
Affiliations
  • Department of Biotechnology, Delft University of Technology, NL-2628 BC Delft
  • Delft University of Technology (NL)
  • BIRD Engineering B.V., NL-3044 CK Rotterdam, The Netherlands
Corresponding author
Pronk, Jack T.
Venue
Applied and Environmental Microbiology
Published
2004-01
Volume
70
Issue
1
Pages
159-166
ISSN
  • 0099-2240 (ISSN-L)
  • 1098-5336
OpenAlex
W2119059442
Cited by
227
References
51
Citations by year
2026: 3 · 2025: 5 · 2024: 10 · 2023: 5 · 2022: 15 · 2021: 25 · 2020: 19 · 2019: 5 · 2018: 16 · 2017: 16 · 2016: 15 · 2015: 16 · 2014: 14 · 2013: 10 · 2012: 16
FWCI
1.42
Type
journal article
Language
en
Open access
Locations
  • Applied and Environmental Microbiology (publishedVersion, public-domain)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • UCL Discovery (University College London) (submittedVersion)
  • Research Repository (Delft University of Technology) (submittedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Microbial Metabolic Engineering and Bioproduction
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
  • Physical Sciences › Engineering › Biomedical Engineering › Biofuel production and bioconversion
Keywords
Saccharomyces cerevisiae, glucose tolerance, phenotypic selection, glucose repression, glucose-limited chemostat, batch culture, yeast metabolic engineering
MeSH terms
Culture Media, Glucose, Mutation, Pyruvate Decarboxylase, Saccharomyces cerevisiae, Transcription, Genetic, Gene Expression Regulation, Fungal, Directed Molecular Evolution, Pyruvic Acid, Proteome, Saccharomyces cerevisiae Proteins

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