Article (Scientific journals)
Enhancing erythritol productivity in Yarrowia lipolytica using metabolic engineering
Carly, Frédéric; Vandermies, Marie; Telek, Samuel et al.
2017In Metabolic Engineering, 42, p. 19-24
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Keywords :
Yarrowia lipolytica; Erythritol; Metabolic engineering; Glycerol kinase; Transketolase; Erythrulose kinase
Abstract :
[en] Erythritol (1,2,3,4-butanetetrol) is a four-carbon sugar alcohol with sweetening properties that is used by the agrofood industry as a food additive. In this study, we demonstrated that metabolic engineering can be used to improve the production of erythritol from glycerol in the yeast Yarrowia lipolytica. The best results were obtained using a mutant that overexpressed GUT1 and TKL1, which encode a glycerol kinase and a transketolase, respectively, and in which EYK1, which encodes erythrulose kinase, was disrupted; the latter enzyme is involved in an early step of erythritol catabolism. In this strain, erythritol productivity was 75% higher than in the wild type; furthermore, the culturing time needed to achieve maximum concentration was reduced by 40%. An additional advantage is that the strain was unable to consume the erythritol it had created, further increasing the process's efficiency. The erythritol productivity values we obtained here are among the highest reported thus far.
Disciplines :
Biotechnology
Author, co-author :
Carly, Frédéric
Vandermies, Marie ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Microbial, food and biobased technologies
Telek, Samuel  ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Microbial, food and biobased technologies
Steels, Sébastien ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Microbial, food and biobased technologies
Thomas, Stéphane
Nicaud, Jean-Marc
Fickers, Patrick ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Microbial, food and biobased technologies
Language :
English
Title :
Enhancing erythritol productivity in Yarrowia lipolytica using metabolic engineering
Publication date :
July 2017
Journal title :
Metabolic Engineering
ISSN :
1096-7176
eISSN :
1096-7184
Publisher :
Academic Press
Volume :
42
Pages :
19-24
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture [BE]
Available on ORBi :
since 18 July 2017

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