Physiological and transcriptomic analysis of a salt-resistant Saccharomyces cerevisiae mutant obtained by evolutionary engineering
Salt-resistant yeast strains are highly demanded by industry due to the exposure of yeast cells to high concentrations of salt, in various industrial bioprocesses. The aim of this study was to perform a physiological and transcriptomic analysis of a salt-resistant Saccharomyces cerevisiae (S. cerev...
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| Format: | Article |
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Association of Basic Medical Sciences of Federation of Bosnia and Herzegovina
2018-02-01
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| Series: | Biomolecules & Biomedicine |
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| Online Access: | https://www.bjbms.org/ojs/index.php/bjbms/article/view/2250 |
| _version_ | 1797260903205306368 |
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| author | Seyma Hande Tekarslan-Sahin Ceren Alkim Tugba Sezgin |
| author_facet | Seyma Hande Tekarslan-Sahin Ceren Alkim Tugba Sezgin |
| author_sort | Seyma Hande Tekarslan-Sahin |
| collection | DOAJ |
| description |
Salt-resistant yeast strains are highly demanded by industry due to the exposure of yeast cells to high concentrations of salt, in various industrial bioprocesses. The aim of this study was to perform a physiological and transcriptomic analysis of a salt-resistant Saccharomyces cerevisiae (S. cerevisiae) mutant generated by evolutionary engineering. NaCl-resistant S. cerevisiae strains were obtained by ethyl methanesulfonate (EMS) mutagenesis followed by successive batch cultivations in the presence of gradually increasing NaCl concentrations, up to 8.5% w/v of NaCl (1.45 M). The most probable number (MPN) method, high-performance liquid chromatography (HPLC), and glucose oxidase/peroxidase method were used for physiological analysis, while Agilent yeast DNA microarray systems were used for transcriptome analysis. NaCl-resistant mutant strain T8 was highly cross-resistant to LiCl and highly sensitive to AlCl3. In the absence of NaCl stress, T8 strain had significantly higher trehalose and glycogen levels compared to the reference strain. Global transcriptome analysis by means of DNA microarrays showed that the genes related to stress response, carbohydrate transport, glycogen and trehalose biosynthesis, as well as biofilm formation, were upregulated. According to gene set enrichment analysis, 548 genes were upregulated and 22 downregulated in T8 strain, compared to the reference strain. Among the 548 upregulated genes, the highest upregulation was observed for the FLO11 (MUC1) gene (92-fold that of the reference strain). Overall, evolutionary engineering by chemical mutagenesis and increasing NaCl concentrations is a promising approach in developing industrial strains for biotechnological applications.
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| first_indexed | 2024-04-24T23:32:43Z |
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| id | doaj.art-ad9dd0e4c43c462ebf992333bfdcee34 |
| institution | Directory Open Access Journal |
| issn | 2831-0896 2831-090X |
| language | English |
| last_indexed | 2024-04-24T23:32:43Z |
| publishDate | 2018-02-01 |
| publisher | Association of Basic Medical Sciences of Federation of Bosnia and Herzegovina |
| record_format | Article |
| series | Biomolecules & Biomedicine |
| spelling | doaj.art-ad9dd0e4c43c462ebf992333bfdcee342024-03-15T14:31:10ZengAssociation of Basic Medical Sciences of Federation of Bosnia and HerzegovinaBiomolecules & Biomedicine2831-08962831-090X2018-02-0118110.17305/bjbms.2017.2250297Physiological and transcriptomic analysis of a salt-resistant Saccharomyces cerevisiae mutant obtained by evolutionary engineeringSeyma Hande Tekarslan-Sahin0Ceren Alkim1Tugba Sezgin2Department of Molecular Biology and Genetics, Faculty of Science and Letters, Istanbul Technical University, Istanbul, Turkey; Dr. Orhan Öcalgiray Molecular Biology, Biotechnology and Genetics Research Center (ITU-MOBGAM), Istanbul Technical University, Istanbul, Turkey; Department of Pharmaceutical Technology, Faculty of Pharmacy, Istanbul University, Istanbul, TurkeyDepartment of Molecular Biology and Genetics, Faculty of Science and Letters, Istanbul Technical University, Istanbul, Turkey; Dr. Orhan Öcalgiray Molecular Biology, Biotechnology and Genetics Research Center (ITU-MOBGAM), Istanbul Technical University, Istanbul, Turkey; Laboratory of Engineering of Biological Systems and Processes (LISBP), University of Toulouse, Toulouse, FranceDepartment of Molecular Biology and Genetics, Faculty of Science and Letters, Istanbul Technical University, Istanbul, Turkey; Dr. Orhan Öcalgiray Molecular Biology, Biotechnology and Genetics Research Center (ITU-MOBGAM), Istanbul Technical University, Istanbul, Turkey Salt-resistant yeast strains are highly demanded by industry due to the exposure of yeast cells to high concentrations of salt, in various industrial bioprocesses. The aim of this study was to perform a physiological and transcriptomic analysis of a salt-resistant Saccharomyces cerevisiae (S. cerevisiae) mutant generated by evolutionary engineering. NaCl-resistant S. cerevisiae strains were obtained by ethyl methanesulfonate (EMS) mutagenesis followed by successive batch cultivations in the presence of gradually increasing NaCl concentrations, up to 8.5% w/v of NaCl (1.45 M). The most probable number (MPN) method, high-performance liquid chromatography (HPLC), and glucose oxidase/peroxidase method were used for physiological analysis, while Agilent yeast DNA microarray systems were used for transcriptome analysis. NaCl-resistant mutant strain T8 was highly cross-resistant to LiCl and highly sensitive to AlCl3. In the absence of NaCl stress, T8 strain had significantly higher trehalose and glycogen levels compared to the reference strain. Global transcriptome analysis by means of DNA microarrays showed that the genes related to stress response, carbohydrate transport, glycogen and trehalose biosynthesis, as well as biofilm formation, were upregulated. According to gene set enrichment analysis, 548 genes were upregulated and 22 downregulated in T8 strain, compared to the reference strain. Among the 548 upregulated genes, the highest upregulation was observed for the FLO11 (MUC1) gene (92-fold that of the reference strain). Overall, evolutionary engineering by chemical mutagenesis and increasing NaCl concentrations is a promising approach in developing industrial strains for biotechnological applications. https://www.bjbms.org/ojs/index.php/bjbms/article/view/2250Evolutionary engineeringtranscriptome analysisNaCl-resistanceSaccharomyces cerevisiaestress resistanceindustrial strains |
| spellingShingle | Seyma Hande Tekarslan-Sahin Ceren Alkim Tugba Sezgin Physiological and transcriptomic analysis of a salt-resistant Saccharomyces cerevisiae mutant obtained by evolutionary engineering Biomolecules & Biomedicine Evolutionary engineering transcriptome analysis NaCl-resistance Saccharomyces cerevisiae stress resistance industrial strains |
| title | Physiological and transcriptomic analysis of a salt-resistant Saccharomyces cerevisiae mutant obtained by evolutionary engineering |
| title_full | Physiological and transcriptomic analysis of a salt-resistant Saccharomyces cerevisiae mutant obtained by evolutionary engineering |
| title_fullStr | Physiological and transcriptomic analysis of a salt-resistant Saccharomyces cerevisiae mutant obtained by evolutionary engineering |
| title_full_unstemmed | Physiological and transcriptomic analysis of a salt-resistant Saccharomyces cerevisiae mutant obtained by evolutionary engineering |
| title_short | Physiological and transcriptomic analysis of a salt-resistant Saccharomyces cerevisiae mutant obtained by evolutionary engineering |
| title_sort | physiological and transcriptomic analysis of a salt resistant saccharomyces cerevisiae mutant obtained by evolutionary engineering |
| topic | Evolutionary engineering transcriptome analysis NaCl-resistance Saccharomyces cerevisiae stress resistance industrial strains |
| url | https://www.bjbms.org/ojs/index.php/bjbms/article/view/2250 |
| work_keys_str_mv | AT seymahandetekarslansahin physiologicalandtranscriptomicanalysisofasaltresistantsaccharomycescerevisiaemutantobtainedbyevolutionaryengineering AT cerenalkim physiologicalandtranscriptomicanalysisofasaltresistantsaccharomycescerevisiaemutantobtainedbyevolutionaryengineering AT tugbasezgin physiologicalandtranscriptomicanalysisofasaltresistantsaccharomycescerevisiaemutantobtainedbyevolutionaryengineering |