Cited by 49Microbial Metabolic Engineering and BioproductionFungal and yeast genetics researchMicrobial metabolism and enzyme function

Phosphoenolpyruvate Carboxykinase as the Sole Anaplerotic Enzyme in Saccharomyces cerevisiae

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Zelle, Rintze M., Trueheart, Josh, Harrison, Jacob C., Pronk, Jack T., van Maris, Antonius J. A.·2010·Applied and Environmental Microbiology

Abstract

Pyruvate carboxylase is the sole anaplerotic enzyme in glucose-grown cultures of wild-type Saccharomyces cerevisiae . Pyruvate carboxylase-negative (Pyc − ) S. cerevisiae strains cannot grow on glucose unless media are supplemented with C 4 compounds, such as aspartic acid. In several succinate-producing prokaryotes, phosphoenolpyruvate carboxykinase (PEPCK) fulfills this anaplerotic role. However, the S. cerevisiae PEPCK encoded by PCK1 is repressed by glucose and is considered to have a purely decarboxylating and gluconeogenic function. This study investigates whether and under which conditions PEPCK can replace the anaplerotic function of pyruvate carboxylase in S. cerevisiae . Pyc − S. cerevisiae strains constitutively overexpressing the PEPCK either from S. cerevisiae or from Actinobacillus succinogenes did not grow on glucose as the sole carbon source. However, evolutionary engineering yielded mutants able to grow on glucose as the sole carbon source at a maximum specific growth rate of ca. 0.14 h −1 , one-half that of the (pyruvate carboxylase-positive) reference strain grown under the same conditions. Growth was dependent on high carbon dioxide concentrations, indicating that the reaction catalyzed by PEPCK operates near thermodynamic equilibrium. Analysis and reverse engineering of two independently evolved strains showed that single point mutations in pyruvate kinase, which competes with PEPCK for phosphoenolpyruvate, were sufficient to enable the use of PEPCK as the sole anaplerotic enzyme. The PEPCK reaction produces one ATP per carboxylation event, whereas the original route through pyruvate kinase and pyruvate carboxylase is ATP neutral. This increased ATP yield may prove crucial for engineering of efficient and low-cost anaerobic production of C 4 dicarboxylic acids in S. cerevisiae .

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  • Early glucose-limited chemostat studies in S. cerevisiae showed that glucose-limited selection led to increased biomass yield and a decreased fermentative capacity.

    “Early studies in glucose-limited chemostats revealed that glucose-limited selection led to increased biomass yield and a decreased fermentative capacity [93,98].”

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Authors
Zelle, R. M., Trueheart, J., Harrison, J. C., Pronk, J. T., & van Maris, A. J. A.
Affiliations
  • Delft University of Technology (NL)
  • Microbia, Inc., 60 Westview Street, Lexington, Massachusetts 02421
  • Department of Biotechnology, Delft University of Technology and Kluyver Centre for Genomics of Industrial Fermentation, Julianalaan 67, 2628 BC Delft, Netherlands
Venue
Applied and Environmental Microbiology
Published
2010-08-15
Volume
76
Issue
16
Pages
5383-5389
ISSN
  • 0099-2240 (ISSN-L)
  • 1098-5336
OpenAlex
W2103349249
Cited by
49
References
45
Citations by year
2026: 2 · 2025: 1 · 2023: 2 · 2022: 2 · 2020: 5 · 2019: 6 · 2018: 5 · 2017: 4 · 2016: 1 · 2015: 3 · 2014: 5 · 2013: 4 · 2012: 3
FWCI
1.69
Type
journal article
Language
en
Open access
Locations
  • Applied and Environmental Microbiology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
  • Research Repository (Delft University of Technology) (submittedVersion)
  • Zenodo (CERN European Organization for Nuclear Research) (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
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Microbial metabolism and enzyme function
Keywords
phosphoenolpyruvate carboxykinase, anaplerosis, pyruvate carboxylase, pyruvate kinase, Saccharomyces cerevisiae, succinic acid, Actinobacillus succinogenes, evolutionary engineering, ATP yield, gluconeogenesis, thermodynamic equilibrium
MeSH terms
Actinobacillus, Carbon, Carbon Dioxide, DNA Mutational Analysis, Glucose, Phosphoenolpyruvate, Pyruvate Carboxylase, Pyruvate Kinase, Saccharomyces cerevisiae, Gene Deletion, Point Mutation, Phosphoenolpyruvate Carboxykinase (ATP), Mutant Proteins

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