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

FEMS Yeast Research
Michael GossingJens Nielsen

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.

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Citations

Jun 19, 2019·The Journal of Biological Chemistry·Angelina S GrossTobias Eisenberg
Oct 3, 2019·ACS Synthetic Biology·Raphael FerreiraFlorian David

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