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New recombinant strains of the yeast Yarrowia lipolytica with overexpression of the aconitate hydratase gene for the obtainment of isocitric acid from rapeseed oil

New recombinant strains of the yeast Yarrowia lipolytica with overexpression of the aconitate... The yeast Yarrowia lipolytica is capable of high-intensity synthesis (overproduction) of citric (CA) and isocitric (ICA) acids under nitrogen limitation. The ratio of the synthesized acids depends on the producing strains used and the expression level of the aconitate hydratase gene (ACO1). Recombinant variants with overexpression of the multicopy ACO1 gene have been obtained based on the natural ICA-producing strain Y. lipolytica 672. A recombinant strain Y. lipolytica 20, which has an isocitrate-citrate ratio shifted towards ICA (2.3: 1) as compared to the parental strain (1.1: 1), has been selected. Culturing of the 20 variant in a 10 L reactor has resulted in the production of 72.6 g/L of ICA and 29.0 g/L of CA with a ratio of 2.5: 1. This makes it possible to regard Y. lipolytica 20 as a promising producer for the development of an industrial process for isocitrate production. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Biochemistry and Microbiology Springer Journals

New recombinant strains of the yeast Yarrowia lipolytica with overexpression of the aconitate hydratase gene for the obtainment of isocitric acid from rapeseed oil

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References (20)

Publisher
Springer Journals
Copyright
Copyright © 2016 by Pleiades Publishing, Inc.
Subject
Life Sciences; Biochemistry, general; Microbiology; Medical Microbiology
ISSN
0003-6838
eISSN
1608-3024
DOI
10.1134/S000368381607005X
Publisher site
See Article on Publisher Site

Abstract

The yeast Yarrowia lipolytica is capable of high-intensity synthesis (overproduction) of citric (CA) and isocitric (ICA) acids under nitrogen limitation. The ratio of the synthesized acids depends on the producing strains used and the expression level of the aconitate hydratase gene (ACO1). Recombinant variants with overexpression of the multicopy ACO1 gene have been obtained based on the natural ICA-producing strain Y. lipolytica 672. A recombinant strain Y. lipolytica 20, which has an isocitrate-citrate ratio shifted towards ICA (2.3: 1) as compared to the parental strain (1.1: 1), has been selected. Culturing of the 20 variant in a 10 L reactor has resulted in the production of 72.6 g/L of ICA and 29.0 g/L of CA with a ratio of 2.5: 1. This makes it possible to regard Y. lipolytica 20 as a promising producer for the development of an industrial process for isocitrate production.

Journal

Applied Biochemistry and MicrobiologySpringer Journals

Published: Feb 7, 2017

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