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Title: Understanding and eliminating the detrimental effect of thiamine deficiency on the oleaginous yeast Yarrowia lipolytica

Abstract

Thiamine is a vitamin that functions as a cofactor for key enzymes in carbon and energy metabolism for all living cells. While most plants, fungi and bacteria can synthesize thiamine de novo, the oleaginous yeast, Yarrowia lipolytica, cannot. In this paper, we used proteomics together with physiological characterization to understand key metabolic processes influenced and regulated by thiamine availability and identified the genetic basis of thiamine auxotrophy in Y. lipolytica. Specifically, we found thiamine depletion results in decreased protein abundance of the lipid biosynthesis pathways and energy metabolism (i.e., ATP synthase), attributing to the negligible growth and poor sugar assimilation observed in our study. Using comparative genomics, we identified the missing 4-amino-5-hydroxymethyl-2-methylpyrimidine phosphate synthase (THI13) in the de novo thiamine biosynthesis of Y. lipolytica, and discovered an exceptional promoter, P3, that exhibits strong activation or tight repression by low and high thiamine concentrations, respectively. Capitalizing on the strength of our thiamine-regulated promoter (P3) to express the missing gene from Saccharomyces cerevisiae (scTHI13), we engineered the thiamine-prototrophic Y. lipolytica. By comparing this engineered strain to the wildtype, we unveiled the tight relationship linking thiamine availability to lipid biosynthesis and demonstrated enhanced lipid production with thiamine supplementation in the engineered thiamine-prototrophic Y.more » lipolytica.« less

Authors:
 [1];  [1];  [2];  [1]; ORCiD logo [1]
  1. The Univ. of Tennessee, Knoxville, TN (United States). Dept. of Chemical and Biomolecular Engineering
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Sciences Div.
Publication Date:
Research Org.:
Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division
OSTI Identifier:
1573884
Alternate Identifier(s):
OSTI ID: 1761709
Grant/Contract Number:  
SC0019412; AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Applied and Environmental Microbiology
Additional Journal Information:
Journal Volume: 86; Journal Issue: 3; Journal ID: ISSN 0099-2240
Publisher:
American Society for Microbiology
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; Yarrowia lipolytica; thiamine metabolism; thiamine auxotroph; thiamine prototroph; thiamine-regulated promoters; lipid production; thiamine deficiency

Citation Formats

Walker, Caleb, Ryu, Seunghyun, Giannone, Richard J., Garcia, Sergio, and Trinh, Cong T. Understanding and eliminating the detrimental effect of thiamine deficiency on the oleaginous yeast Yarrowia lipolytica. United States: N. p., 2019. Web. doi:10.1128/AEM.02299-19.
Walker, Caleb, Ryu, Seunghyun, Giannone, Richard J., Garcia, Sergio, & Trinh, Cong T. Understanding and eliminating the detrimental effect of thiamine deficiency on the oleaginous yeast Yarrowia lipolytica. United States. https://doi.org/10.1128/AEM.02299-19
Walker, Caleb, Ryu, Seunghyun, Giannone, Richard J., Garcia, Sergio, and Trinh, Cong T. 2019. "Understanding and eliminating the detrimental effect of thiamine deficiency on the oleaginous yeast Yarrowia lipolytica". United States. https://doi.org/10.1128/AEM.02299-19. https://www.osti.gov/servlets/purl/1573884.
@article{osti_1573884,
title = {Understanding and eliminating the detrimental effect of thiamine deficiency on the oleaginous yeast Yarrowia lipolytica},
author = {Walker, Caleb and Ryu, Seunghyun and Giannone, Richard J. and Garcia, Sergio and Trinh, Cong T.},
abstractNote = {Thiamine is a vitamin that functions as a cofactor for key enzymes in carbon and energy metabolism for all living cells. While most plants, fungi and bacteria can synthesize thiamine de novo, the oleaginous yeast, Yarrowia lipolytica, cannot. In this paper, we used proteomics together with physiological characterization to understand key metabolic processes influenced and regulated by thiamine availability and identified the genetic basis of thiamine auxotrophy in Y. lipolytica. Specifically, we found thiamine depletion results in decreased protein abundance of the lipid biosynthesis pathways and energy metabolism (i.e., ATP synthase), attributing to the negligible growth and poor sugar assimilation observed in our study. Using comparative genomics, we identified the missing 4-amino-5-hydroxymethyl-2-methylpyrimidine phosphate synthase (THI13) in the de novo thiamine biosynthesis of Y. lipolytica, and discovered an exceptional promoter, P3, that exhibits strong activation or tight repression by low and high thiamine concentrations, respectively. Capitalizing on the strength of our thiamine-regulated promoter (P3) to express the missing gene from Saccharomyces cerevisiae (scTHI13), we engineered the thiamine-prototrophic Y. lipolytica. By comparing this engineered strain to the wildtype, we unveiled the tight relationship linking thiamine availability to lipid biosynthesis and demonstrated enhanced lipid production with thiamine supplementation in the engineered thiamine-prototrophic Y. lipolytica.},
doi = {10.1128/AEM.02299-19},
url = {https://www.osti.gov/biblio/1573884}, journal = {Applied and Environmental Microbiology},
issn = {0099-2240},
number = 3,
volume = 86,
place = {United States},
year = {Fri Nov 08 00:00:00 EST 2019},
month = {Fri Nov 08 00:00:00 EST 2019}
}

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Cited by: 14 works
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