Tailoring and optimizing fatty acid production by oleaginous yeasts through the systematic exploration of their physiological fitness
Abstract Background The use of palm oil for our current needs is unsustainable. Replacing palm oil with oils produced by microbes through the conversion of sustainable feedstocks is a promising alternative. However, there are major technical challenges that must be overcome to enable this transition...
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| Format: | Article |
| Language: | English |
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BMC
2022-11-01
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| Series: | Microbial Cell Factories |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s12934-022-01956-5 |
| _version_ | 1798044312528748544 |
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| author | Zeynep Efsun Duman-Özdamar Vitor A. P. Martins dos Santos Jeroen Hugenholtz Maria Suarez-Diez |
| author_facet | Zeynep Efsun Duman-Özdamar Vitor A. P. Martins dos Santos Jeroen Hugenholtz Maria Suarez-Diez |
| author_sort | Zeynep Efsun Duman-Özdamar |
| collection | DOAJ |
| description | Abstract Background The use of palm oil for our current needs is unsustainable. Replacing palm oil with oils produced by microbes through the conversion of sustainable feedstocks is a promising alternative. However, there are major technical challenges that must be overcome to enable this transition. Foremost among these challenges is the stark increase in lipid accumulation and production of higher content of specific fatty acids. Therefore, there is a need for more in-depth knowledge and systematic exploration of the oil productivity of the oleaginous yeasts. In this study, we cultivated Cutaneotrichosporon oleaginosus and Yarrowia lipolytica at various C/N ratios and temperatures in a defined medium with glycerol as carbon source and urea as nitrogen source. We ascertained the synergistic effect between various C/N ratios of a defined medium at different temperatures with Response Surface Methodology (RSM) and explored the variation in fatty acid composition through Principal Component Analysis. Results By applying RSM, we determined a temperature of 30 °C and a C/N ratio of 175 g/g to enable maximal oil production by C. oleaginosus and a temperature of 21 °C and a C/N ratio of 140 g/g for Y. lipolytica. We increased production by 71% and 66% respectively for each yeast compared to the average lipid accumulation in all tested conditions. Modulating temperature enabled us to steer the fatty acid compositions. Accordingly, switching from higher temperature to lower cultivation temperature shifted the production of oils from more saturated to unsaturated by 14% in C. oleaginosus and 31% in Y. lipolytica. Higher cultivation temperatures resulted in production of even longer saturated fatty acids, 3% in C. oleaginosus and 1.5% in Y. lipolytica. Conclusions In this study, we provided the optimum C/N ratio and temperature for C. oleaginosus and Y. lipolytica by RSM. Additionally, we demonstrated that lipid accumulation of both oleaginous yeasts was significantly affected by the C/N ratio and temperature. Furthermore, we systematically analyzed the variation in fatty acids composition and proved that changing the C/N ratio and temperature steer the composition. We have further established these oleaginous yeasts as platforms for production of tailored fatty acids. |
| first_indexed | 2024-04-11T23:01:51Z |
| format | Article |
| id | doaj.art-74340a0eb7574cefabc37175f2f49c91 |
| institution | Directory Open Access Journal |
| issn | 1475-2859 |
| language | English |
| last_indexed | 2024-04-11T23:01:51Z |
| publishDate | 2022-11-01 |
| publisher | BMC |
| record_format | Article |
| series | Microbial Cell Factories |
| spelling | doaj.art-74340a0eb7574cefabc37175f2f49c912022-12-22T03:58:07ZengBMCMicrobial Cell Factories1475-28592022-11-0121111310.1186/s12934-022-01956-5Tailoring and optimizing fatty acid production by oleaginous yeasts through the systematic exploration of their physiological fitnessZeynep Efsun Duman-Özdamar0Vitor A. P. Martins dos Santos1Jeroen Hugenholtz2Maria Suarez-Diez3Bioprocess Engineering, Wageningen University & ResearchBioprocess Engineering, Wageningen University & ResearchWageningen Food & Biobased Research, Wageningen University & ResearchLaboratory of Systems and Synthetic Biology, Wageningen University & ResearchAbstract Background The use of palm oil for our current needs is unsustainable. Replacing palm oil with oils produced by microbes through the conversion of sustainable feedstocks is a promising alternative. However, there are major technical challenges that must be overcome to enable this transition. Foremost among these challenges is the stark increase in lipid accumulation and production of higher content of specific fatty acids. Therefore, there is a need for more in-depth knowledge and systematic exploration of the oil productivity of the oleaginous yeasts. In this study, we cultivated Cutaneotrichosporon oleaginosus and Yarrowia lipolytica at various C/N ratios and temperatures in a defined medium with glycerol as carbon source and urea as nitrogen source. We ascertained the synergistic effect between various C/N ratios of a defined medium at different temperatures with Response Surface Methodology (RSM) and explored the variation in fatty acid composition through Principal Component Analysis. Results By applying RSM, we determined a temperature of 30 °C and a C/N ratio of 175 g/g to enable maximal oil production by C. oleaginosus and a temperature of 21 °C and a C/N ratio of 140 g/g for Y. lipolytica. We increased production by 71% and 66% respectively for each yeast compared to the average lipid accumulation in all tested conditions. Modulating temperature enabled us to steer the fatty acid compositions. Accordingly, switching from higher temperature to lower cultivation temperature shifted the production of oils from more saturated to unsaturated by 14% in C. oleaginosus and 31% in Y. lipolytica. Higher cultivation temperatures resulted in production of even longer saturated fatty acids, 3% in C. oleaginosus and 1.5% in Y. lipolytica. Conclusions In this study, we provided the optimum C/N ratio and temperature for C. oleaginosus and Y. lipolytica by RSM. Additionally, we demonstrated that lipid accumulation of both oleaginous yeasts was significantly affected by the C/N ratio and temperature. Furthermore, we systematically analyzed the variation in fatty acids composition and proved that changing the C/N ratio and temperature steer the composition. We have further established these oleaginous yeasts as platforms for production of tailored fatty acids.https://doi.org/10.1186/s12934-022-01956-5Oleaginous yeastsMicrobial oilResponse surface methodologyCarbon to nitrogen ratioLipid accumulation |
| spellingShingle | Zeynep Efsun Duman-Özdamar Vitor A. P. Martins dos Santos Jeroen Hugenholtz Maria Suarez-Diez Tailoring and optimizing fatty acid production by oleaginous yeasts through the systematic exploration of their physiological fitness Microbial Cell Factories Oleaginous yeasts Microbial oil Response surface methodology Carbon to nitrogen ratio Lipid accumulation |
| title | Tailoring and optimizing fatty acid production by oleaginous yeasts through the systematic exploration of their physiological fitness |
| title_full | Tailoring and optimizing fatty acid production by oleaginous yeasts through the systematic exploration of their physiological fitness |
| title_fullStr | Tailoring and optimizing fatty acid production by oleaginous yeasts through the systematic exploration of their physiological fitness |
| title_full_unstemmed | Tailoring and optimizing fatty acid production by oleaginous yeasts through the systematic exploration of their physiological fitness |
| title_short | Tailoring and optimizing fatty acid production by oleaginous yeasts through the systematic exploration of their physiological fitness |
| title_sort | tailoring and optimizing fatty acid production by oleaginous yeasts through the systematic exploration of their physiological fitness |
| topic | Oleaginous yeasts Microbial oil Response surface methodology Carbon to nitrogen ratio Lipid accumulation |
| url | https://doi.org/10.1186/s12934-022-01956-5 |
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