Tags

Type your tag names separated by a space and hit enter

Anaerobic homolactate fermentation with Saccharomyces cerevisiae results in depletion of ATP and impaired metabolic activity.
FEMS Yeast Res. 2009 May; 9(3):349-57.FY

Abstract

Conversion of glucose to lactic acid is stoichiometrically equivalent to ethanol formation with respect to ATP formation from substrate-level phosphorylation, redox equivalents and product yield. However, anaerobic growth cannot be sustained in homolactate fermenting Saccharomyces cerevisiae. ATP-dependent export of the lactate anion and/or proton, resulting in net zero ATP formation, is suspected as the underlying cause. In an effort to understand the mechanisms behind the decreased lactic acid production rate in anaerobic homolactate cultures of S. cerevisiae, aerobic carbon-limited chemostats were performed and subjected to anaerobic perturbations in the presence of high glucose concentrations. Intracellular measurements of adenosine phosphates confirmed ATP depletion and decreased energy charge immediately upon anaerobicity. Unexpectedly, readily available sources of carbon and energy, trehalose and glycogen, were not activated in homolactate strains as they were in reference strains that produce ethanol. Finally, the anticipated increase in maximal velocity (V(max)) of glycolytic enzymes was not observed in homolactate fermentation suggesting the absence of protein synthesis that may be attributed to decreased energy availability. Essentially, anaerobic homolactate fermentation results in energy depletion, which, in turn, hinders protein synthesis, central carbon metabolism and subsequent energy generation.

Authors+Show Affiliations

Department of Biotechnology, Delft University of Technology, Delft, The Netherlands.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

19416100

Citation

Abbott, Derek A., et al. "Anaerobic Homolactate Fermentation With Saccharomyces Cerevisiae Results in Depletion of ATP and Impaired Metabolic Activity." FEMS Yeast Research, vol. 9, no. 3, 2009, pp. 349-57.
Abbott DA, van den Brink J, Minneboo IM, et al. Anaerobic homolactate fermentation with Saccharomyces cerevisiae results in depletion of ATP and impaired metabolic activity. FEMS Yeast Res. 2009;9(3):349-57.
Abbott, D. A., van den Brink, J., Minneboo, I. M., Pronk, J. T., & van Maris, A. J. (2009). Anaerobic homolactate fermentation with Saccharomyces cerevisiae results in depletion of ATP and impaired metabolic activity. FEMS Yeast Research, 9(3), 349-57. https://doi.org/10.1111/j.1567-1364.2009.00506.x
Abbott DA, et al. Anaerobic Homolactate Fermentation With Saccharomyces Cerevisiae Results in Depletion of ATP and Impaired Metabolic Activity. FEMS Yeast Res. 2009;9(3):349-57. PubMed PMID: 19416100.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Anaerobic homolactate fermentation with Saccharomyces cerevisiae results in depletion of ATP and impaired metabolic activity. AU - Abbott,Derek A, AU - van den Brink,Joost, AU - Minneboo,Inge M K, AU - Pronk,Jack T, AU - van Maris,Antonius J A, PY - 2009/5/7/entrez PY - 2009/5/7/pubmed PY - 2009/7/31/medline SP - 349 EP - 57 JF - FEMS yeast research JO - FEMS Yeast Res VL - 9 IS - 3 N2 - Conversion of glucose to lactic acid is stoichiometrically equivalent to ethanol formation with respect to ATP formation from substrate-level phosphorylation, redox equivalents and product yield. However, anaerobic growth cannot be sustained in homolactate fermenting Saccharomyces cerevisiae. ATP-dependent export of the lactate anion and/or proton, resulting in net zero ATP formation, is suspected as the underlying cause. In an effort to understand the mechanisms behind the decreased lactic acid production rate in anaerobic homolactate cultures of S. cerevisiae, aerobic carbon-limited chemostats were performed and subjected to anaerobic perturbations in the presence of high glucose concentrations. Intracellular measurements of adenosine phosphates confirmed ATP depletion and decreased energy charge immediately upon anaerobicity. Unexpectedly, readily available sources of carbon and energy, trehalose and glycogen, were not activated in homolactate strains as they were in reference strains that produce ethanol. Finally, the anticipated increase in maximal velocity (V(max)) of glycolytic enzymes was not observed in homolactate fermentation suggesting the absence of protein synthesis that may be attributed to decreased energy availability. Essentially, anaerobic homolactate fermentation results in energy depletion, which, in turn, hinders protein synthesis, central carbon metabolism and subsequent energy generation. SN - 1567-1364 UR - https://www.unboundmedicine.com/medline/citation/19416100/Anaerobic_homolactate_fermentation_with_Saccharomyces_cerevisiae_results_in_depletion_of_ATP_and_impaired_metabolic_activity_ L2 - https://academic.oup.com/femsyr/article-lookup/doi/10.1111/j.1567-1364.2009.00506.x DB - PRIME DP - Unbound Medicine ER -