| Overexpression of alpha-ketoglutarate dehydrogenase in Yarrowia lipolytica and its effect on production of organic acids. | |
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MedLine Citation:
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PMID: 21057948 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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The yeast Yarrowia lipolytica is one of the most intensively studied "non-conventional" yeast species. Its ability to secrete various organic acids, like pyruvic (PA), citric, isocitric, and alpha-ketoglutaric (KGA) acid, in large amounts is of interest for biotechnological applications. We have studied the effect of the alpha-ketoglutarate dehydrogenase (KGDH) complex on the production process of KGA. Being well studied in Saccharomyces cerevisiae this enzyme complex consists of three subunits: alpha-ketoglutarate dehydrogenase, dihydrolipoyl transsuccinylase, and lipoamide dehydrogenase. Here we report the effect of overexpression of these subunits encoding genes and resulting increase of specific KGDH activity on organic acid production under several conditions of growth limitation and an excess of carbon source in Y. lipolytica. The constructed strain containing multiple copies of all three KGDH genes showed a reduced production of KGA and an elevated production of PA under conditions of KGA production. However, an increased activity of the KGDH complex had no influence on organic acid production under citric acid production conditions. |
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Authors:
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Martina Holz; Christina Otto; Anne Kretzschmar; Venelina Yovkova; Andreas Aurich; Markus Pötter; Achim Marx; Gerold Barth |
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Publication Detail:
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Type: Journal Article Date: 2010-10-30 |
Journal Detail:
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Title: Applied microbiology and biotechnology Volume: 89 ISSN: 1432-0614 ISO Abbreviation: Appl. Microbiol. Biotechnol. Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-02-10 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8406612 Medline TA: Appl Microbiol Biotechnol Country: Germany |
Other Details:
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Languages: eng Pagination: 1519-26 Citation Subset: IM |
Affiliation:
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Institut für Mikrobiologie, Technische Universität Dresden, 01062, Dresden, Germany, martina.holz@tu-dresden.de. |
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