The combination of NAD+-dependent deacetylase gene deletion and the interruption of gluconeogenesis causes increased glucose metabolism in budding yeast

PLoS One. 2018 Mar 26;13(3):e0194942. doi: 10.1371/journal.pone.0194942. eCollection 2018.

Abstract

Metabolic engineering focuses on rewriting the metabolism of cells to enhance native products or endow cells with the ability to produce new products. This engineering has the potential for wide-range application, including the production of fuels, chemicals, foods and pharmaceuticals. Glycolysis manages the levels of various secondary metabolites by controlling the supply of glycolytic metabolites. Metabolic reprogramming of glycolysis is expected to cause an increase in the secondary metabolites of interest. In this study, we constructed a budding yeast strain harboring the combination of triple sirtuin gene deletion (hst3∆ hst4∆ sir2∆) and interruption of gluconeogenesis by the deletion of the FBP1 gene encoding fructose-1,6-bisphosphatase (fbp1∆). hst3∆ hst4∆ sir2∆ fbp1∆ cells harbored active glycolysis with high glucose consumption and active ethanol productivity. Using capillary electrophoresis-time-of-flight mass spectrometry (CE-TOF/MS) analysis, hst3∆ hst4∆ sir2∆ fbp1∆ cells accumulated not only glycolytic metabolites but also secondary metabolites, including nucleotides that were synthesized throughout the pentose phosphate (PP) pathway, although various amino acids remained at low levels. Using the stable isotope labeling assay for metabolites, we confirmed that hst3∆ hst4∆ sir2∆ fbp1∆ cells directed the metabolic fluxes of glycolytic metabolites into the PP pathway. Thus, the deletion of three sirtuin genes (HST3, HST4 and SIR2) and the FBP1 gene can allow metabolic reprogramming to increase glycolytic metabolites and several secondary metabolites except for several amino acids.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Carbon Isotopes / chemistry
  • Electrophoresis, Capillary
  • Fructose-Bisphosphatase / genetics*
  • Fructose-Bisphosphatase / metabolism
  • Gluconeogenesis / genetics*
  • Glucose / analysis
  • Glucose / metabolism*
  • Glycolysis
  • Histone Deacetylases / deficiency
  • Histone Deacetylases / genetics*
  • Isotope Labeling
  • Mass Spectrometry
  • Metabolic Engineering*
  • Metabolome
  • Nucleotides / analysis
  • Nucleotides / metabolism
  • Pentose Phosphate Pathway / physiology
  • Principal Component Analysis
  • Saccharomyces cerevisiae / genetics
  • Saccharomyces cerevisiae / growth & development
  • Saccharomyces cerevisiae / metabolism*
  • Saccharomyces cerevisiae Proteins / genetics*
  • Saccharomyces cerevisiae Proteins / metabolism
  • Silent Information Regulator Proteins, Saccharomyces cerevisiae / deficiency
  • Silent Information Regulator Proteins, Saccharomyces cerevisiae / genetics*
  • Sirtuin 2 / deficiency
  • Sirtuin 2 / genetics*

Substances

  • Carbon Isotopes
  • Nucleotides
  • Saccharomyces cerevisiae Proteins
  • Silent Information Regulator Proteins, Saccharomyces cerevisiae
  • FBP1 protein, S cerevisiae
  • Fructose-Bisphosphatase
  • Hst3 protein, S cerevisiae
  • Hst4 protein, S cerevisiae
  • SIR2 protein, S cerevisiae
  • Sirtuin 2
  • Histone Deacetylases
  • Carbon-13
  • Glucose

Grants and funding

This work was supported by NIG Collaborative Research Program (2016-A1-2) and Special Coordination Funds for Promoting Science and Technology of the Ministry of Education, Culture, Sports, Science and Technology of the Japanese Government.