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Title: Regulation of amino-acid metabolism controls flux to lipid accumulation in Yarrowia lipolytica

Journal Article · · npj Systems Biology and Applications
ORCiD logo [1];  [2];  [2]; ORCiD logo [3]
  1. Chalmers Univ. of Technology, Göteborg (Sweden). Dept. of Biology and Biological Engineering. Systems and Synthetic Biology
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab.
  3. Chalmers Univ. of Technology, Göteborg (Sweden). Dept. of Biology and Biological Engineering. Systems and Synthetic Biology; Technical Univ. of Denmark, Hørsholm (Denmark). Novo Nordisk Foundation Center for Biosustainability

Yarrowia lipolytica is a promising microbial cell factory for the production of lipids to be used as fuels and chemicals, but there are few studies on regulation of its metabolism. Here we performed the first integrated data analysis of Y. lipolytica grown in carbon and nitrogen limited chemostat cultures. We first reconstructed a genome-scale metabolic model and used this for integrative analysis of multilevel omics data. Metabolite profiling and lipidomics was used to quantify the cellular physiology, while regulatory changes were measured using RNAseq. Analysis of the data showed that lipid accumulation in Y. lipolytica does not involve transcriptional regulation of lipid metabolism but is associated with regulation of amino-acid biosynthesis, resulting in redirection of carbon flux during nitrogen limitation from amino acids to lipids. Lipid accumulation in Y. lipolytica at nitrogen limitation is similar to the overflow metabolism observed in many other microorganisms, e.g. ethanol production by Sacchromyces cerevisiae at nitrogen limitation.

Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Chalmers Univ. of Technology, Göteborg (Sweden); Technical Univ. of Denmark, Hørsholm (Denmark)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER); Novo Nordisk Foundation
Grant/Contract Number:
SC0008744; AC05-76RL01830
OSTI ID:
1624016
Alternate ID(s):
OSTI ID: 1768026
Report Number(s):
PNNL-SA-111282; PII: BFnpjsba20165
Journal Information:
npj Systems Biology and Applications, Vol. 2, Issue 1; ISSN 2056-7189
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 113 works
Citation information provided by
Web of Science

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Crosstalk between transcription and metabolism: how much enzyme is enough for a cell?: Crosstalk between transcription and metabolism journal August 2017
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C/N ratio and carbon source-dependent lipid production profiling in Rhodotorula toruloides journal January 2020
Yarrowia lipolytica: a beneficious yeast in biotechnology as a rare opportunistic fungal pathogen: a minireview journal December 2018
Genome-scale modeling of yeast: chronology, applications and critical perspectives journal July 2017
Effects of a high-cultivation temperature on the physiology of three different Yarrowia lipolytica strains journal October 2019
Genome-scale metabolic reconstruction of the stress-tolerant hybrid yeast Zygosaccharomyces parabailii preprint July 2018
Elucidation of complexity and prediction of interactions in microbial communities journal August 2017
Genome-scale model-driven strain design for dicarboxylic acid production in Yarrowia lipolytica journal March 2018
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