Cited by 89Microbial Metabolic Engineering and BioproductionFungal and yeast genetics researchBiofuel production and bioconversion

Evolutionary engineering of Saccharomyces cerevisiae for efficient aerobic xylose consumption

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Scalcinati, Gionata, Otero, José Manuel, Vleet, Jennifer R.H., Jeffries, Thomas W., Olsson, Lisbeth, Nielsen, Jens·2012·FEMS Yeast Research

Abstract

Industrial biotechnology aims to develop robust microbial cell factories, such as Saccharomyces cerevisiae, to produce an array of added value chemicals presently dominated by petrochemical processes. Xylose is the second most abundant monosaccharide after glucose and the most prevalent pentose sugar found in lignocelluloses. Significant research efforts have focused on the metabolic engineering of S. cerevisiae for fast and efficient xylose utilization. This study aims to metabolically engineer S. cerevisiae, such that it can consume xylose as the exclusive substrate while maximizing carbon flux to biomass production. Such a platform may then be enhanced with complementary metabolic engineering strategies that couple biomass production with high value-added chemical. Saccharomyces cerevisiae, expressing xylose reductase, xylitol dehydrogenase and xylulose kinase, from the native xylose-metabolizing yeast Pichia stipitis, was constructed, followed by a directed evolution strategy to improve xylose utilization rates. The resulting S. cerevisiae strain was capable of rapid growth and fast xylose consumption producing only biomass and negligible amount of byproducts. Transcriptional profiling of this strain was employed to further elucidate the observed physiology confirms a strongly up-regulated glyoxylate pathway enabling respiratory metabolism. The resulting strain is a desirable platform for the industrial production of biomass-related products using xylose as a sole carbon source.

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Crossref · 10.1111/j.1567-1364.2012.00808.x

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  • In glucose-limited S. cerevisiae, altered cell morphology and higher affinity towards glucose were observed, although no expression change in the major HXT low-affinity glucose transporters was observed.

    “Altered cell morphology was also observed, as well as higher affinity towards glucose, although no expression change in the major HXT low-affinity glucose transporters was observed [98]”
  • 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].”
  • In glucose-limited S. cerevisiae, decreased activity levels of enzymes related to glycolysis and correlating changes in expression levels of genes such as ENO1, ENO2, TDH1 and PYK1 and down-regulation of the stress response MSN2/4 were observed.

    “Decreased activity levels of enzymes related to glycolysis but also correlating changes in the expression levels of genes such as ENO1, ENO2, TDH1 and PYK1 and down-regulation of the stress response (MSN2/4) were observed.”

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Authors
Scalcinati, G., Otero, J. M., Vleet, J. R. H., Jeffries, T. W., Olsson, L., & Nielsen, J.
Affiliations
  • Chalmers University of Technology (SE)
  • Department of Bacteriology; University of Wisconsin-Madison; Madison; WI; USA
  • University of Wisconsin–Madison (US)
Venue
FEMS Yeast Research
Published
2012-04-30
Volume
12
Issue
5
Pages
582-597
ISSN
1567-1356 (ISSN-L)
OpenAlex
W2074295725
Cited by
89
References
96
Citations by year
2026: 4 · 2024: 1 · 2023: 3 · 2022: 3 · 2021: 8 · 2020: 10 · 2019: 5 · 2018: 8 · 2017: 7 · 2016: 7 · 2015: 7 · 2014: 15 · 2013: 10 · 2012: 1
FWCI
4.25
Type
journal article
Language
en
Open access
Locations
  • FEMS Yeast Research (publishedVersion)
  • PubMed (publishedVersion)
  • Chalmers Publication Library (Chalmers University of Technology) (submittedVersion)
  • Technical University of Denmark, DTU Orbit (Technical University of Denmark, DTU) (submittedVersion)
  • Chalmers Research (Chalmers University of Technology) (submittedVersion)
Funders
  • Knut och Alice Wallenbergs Stiftelse
  • Fondation Chalmers
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, xylose utilization, xylose metabolism, Pichia stipitis, xylose reductase, xylitol dehydrogenase, xylulose kinase, directed evolution, glyoxylate pathway, aerobic metabolism, biomass production, gene expression profiling, metabolic engineering
MeSH terms
Aldehyde Reductase, Carbon, Pichia, Recombinant Proteins, Saccharomyces cerevisiae, Xylose, Phosphotransferases (Alcohol Group Acceptor), Biomass, D-Xylulose Reductase, Metabolic Engineering

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