Impact of forced fatty acid synthesis on metabolism and physiology of Saccharomyces cerevisiae

Michael Gossing, Agata Smialowska, Jens Nielsen*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Nutrient sensing and signaling controls the cellular response to extracellular nutrients and intracellular metabolites. Nutrient-dependent regulation of metabolism ensures balanced energy production and expenditure. We show that disturbing energy balance by forcing fatty acid synthesis has profound impact on metabolism and physiology of the yeast cell. In addition to an expected increase in storage lipids, we observed increased β-oxidation and reduced amino acid biosynthesis, indicating increased activity of nutrient-sensitive kinase Snf1p. We also observed increased sensitivity to rapamycin as well as decreased ribosome biogenesis and translation, indicating reduced activity of nutrient-sensitive kinase target of rapamycin complex 1. Additionally, we detected increased levels of oxidative stress and lower levels of amino acids. This study provides detailed insight into cellular resource redistribution in response to forced fatty acid synthesis and enables optimized engineering of microbial lipid production.

Original languageEnglish
Article numberfoy096
JournalFEMS Yeast Research
Volume18
Issue number8
Number of pages10
ISSN1567-1356
DOIs
Publication statusPublished - 2018

Keywords

  • Amino acid metabolism
  • Cell wall integrity signaling pathway
  • Lipid metabolism
  • Reactive oxygen species
  • Snf1p/AMPK
  • TORC1

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