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Reconstruction of genome-scale metabolic model of Yarrowia lipolytica and its application in overproduction of triacylglycerol

Wei, S. (author)
China
Jian, X. (author)
China
Chen, J. (author)
China
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Zhang, Cheng (author)
KTH,Science for Life Laboratory, SciLifeLab
Hua, Q. (author)
China
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 (creator_code:org_t)
2017-12-02
2017
English.
In: Bioresources and Bioprocessing. - : Springer. - 2197-4365. ; 4:1
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Background: Yarrowia lipolytica is widely studied as a non-conventional model yeast owing to the high level of lipid accumulation. Therein, triacylglycerol (TAG) is a major component of liposome. In order to investigate the TAG biosynthesis mechanism at a systematic level, a novel genome-scale metabolic model of Y. lipolytica was reconstructed based on a previous model iYL619_PCP published by our lab and another model iYali4 published by Kerkhoven et al. Results: The novel model iYL_2.0 contains 645 genes, 1083 metabolites, and 1471 reactions, which was validated more effective on simulations of specific growth rate. The precision of 29 carbon sources utilities reached up to 96.6% when simulated by iYL_2.0. In minimal growth medium, 111 genes were identified as essential for cell growth, whereas 66 essential genes were identified in yeast extract medium, which were verified by database of essential genes, suggesting a better prediction ability of iYL_2.0 in comparison with other existing models. In addition, potential metabolic engineering targets of improving TAG production were predicted by three in silico methods developed in-house, and the effects of amino acids supplementation were investigated based on model iYL_2.0. Conclusions: The reconstructed model iYL_2.0 is a powerful platform for efficiently optimizing the metabolism of TAG and systematically understanding the physiological mechanism of Y. lipolytica. [Figure not available: see fulltext.].

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Datorsystem (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Computer Systems (hsv//eng)

Keyword

Gene-level prediction targets
Genome-scale metabolic model
iYL_2.0
Triacylglycerol
Yarrowia lipolytica

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art (subject category)

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By the author/editor
Wei, S.
Jian, X.
Chen, J.
Zhang, Cheng
Hua, Q.
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ENGINEERING AND TECHNOLOGY
ENGINEERING AND ...
and Electrical Engin ...
and Computer Systems
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Bioresources and ...
By the university
Royal Institute of Technology

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