Engineering the Oleaginous Yeast Rhodosporidium toruloides for Improved Resistance Against Inhibitors in Biomass Hydrolysates
Conversion of lignocellulosic biomass into lipids and related chemicals has attracted much attention in the past two decades, and the oleaginous yeast Rhodosporidiumtoruloides has been widely used in this area. While R. toruloides species naturally have physiological advantages in terms of substrate...
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Frontiers Media S.A.
2021
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oai:doaj.org-article:af28ce0462dd46f5878e16e570e617c82021-11-15T05:31:50ZEngineering the Oleaginous Yeast Rhodosporidium toruloides for Improved Resistance Against Inhibitors in Biomass Hydrolysates2296-418510.3389/fbioe.2021.768934https://doaj.org/article/af28ce0462dd46f5878e16e570e617c82021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fbioe.2021.768934/fullhttps://doaj.org/toc/2296-4185Conversion of lignocellulosic biomass into lipids and related chemicals has attracted much attention in the past two decades, and the oleaginous yeast Rhodosporidiumtoruloides has been widely used in this area. While R. toruloides species naturally have physiological advantages in terms of substrate utilization, lipid accumulation, and inhibitor resistance, reduced lipid production and cell growth are noticed when biomass hydrolysates are used as feedstocks. To improve the robustness of R. toruloides, here, we devised engineered strains by overexpressing genes responsible for phenolic compound degradation. Specifically, gene expression cassettes of the manganese peroxidase gene (MNP) and versatile peroxidase gene (VP) were constructed and integrated into the genome of R. toruloides NP11. A series of engineered strains were evaluated for lipid production in the presence of typical phenolic inhibitors. The results showed that R. toruloides strains with proper expression of MNP or VP indeed grew faster in the presence of vanillin and 5-hydroxymethylfurfural than the parental strain. When cultivated in concentrated mode biomass hydrolysates, the strain VP18 had improved performance as the cell mass and lipid content increased by 30% and 25%, respectively. This study provides more robust oleaginous yeast strains for microbial lipid production from lignocellulosic biomass, and similar efforts may be used to devise more advanced lipid producers.Liting LyuLiting LyuYadong ChuYadong ChuSufang ZhangYue ZhangQitian HuangQitian HuangShuang WangZongbao K. ZhaoZongbao K. ZhaoZongbao K. ZhaoFrontiers Media S.A.articleRhodosporidium toruloidesmicrobial lipidslignocelluloseinhibitorsgenetic engineeringscreeningBiotechnologyTP248.13-248.65ENFrontiers in Bioengineering and Biotechnology, Vol 9 (2021) |
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| topic |
Rhodosporidium toruloides microbial lipids lignocellulose inhibitors genetic engineering screening Biotechnology TP248.13-248.65 |
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Rhodosporidium toruloides microbial lipids lignocellulose inhibitors genetic engineering screening Biotechnology TP248.13-248.65 Liting Lyu Liting Lyu Yadong Chu Yadong Chu Sufang Zhang Yue Zhang Qitian Huang Qitian Huang Shuang Wang Zongbao K. Zhao Zongbao K. Zhao Zongbao K. Zhao Engineering the Oleaginous Yeast Rhodosporidium toruloides for Improved Resistance Against Inhibitors in Biomass Hydrolysates |
| description |
Conversion of lignocellulosic biomass into lipids and related chemicals has attracted much attention in the past two decades, and the oleaginous yeast Rhodosporidiumtoruloides has been widely used in this area. While R. toruloides species naturally have physiological advantages in terms of substrate utilization, lipid accumulation, and inhibitor resistance, reduced lipid production and cell growth are noticed when biomass hydrolysates are used as feedstocks. To improve the robustness of R. toruloides, here, we devised engineered strains by overexpressing genes responsible for phenolic compound degradation. Specifically, gene expression cassettes of the manganese peroxidase gene (MNP) and versatile peroxidase gene (VP) were constructed and integrated into the genome of R. toruloides NP11. A series of engineered strains were evaluated for lipid production in the presence of typical phenolic inhibitors. The results showed that R. toruloides strains with proper expression of MNP or VP indeed grew faster in the presence of vanillin and 5-hydroxymethylfurfural than the parental strain. When cultivated in concentrated mode biomass hydrolysates, the strain VP18 had improved performance as the cell mass and lipid content increased by 30% and 25%, respectively. This study provides more robust oleaginous yeast strains for microbial lipid production from lignocellulosic biomass, and similar efforts may be used to devise more advanced lipid producers. |
| format |
article |
| author |
Liting Lyu Liting Lyu Yadong Chu Yadong Chu Sufang Zhang Yue Zhang Qitian Huang Qitian Huang Shuang Wang Zongbao K. Zhao Zongbao K. Zhao Zongbao K. Zhao |
| author_facet |
Liting Lyu Liting Lyu Yadong Chu Yadong Chu Sufang Zhang Yue Zhang Qitian Huang Qitian Huang Shuang Wang Zongbao K. Zhao Zongbao K. Zhao Zongbao K. Zhao |
| author_sort |
Liting Lyu |
| title |
Engineering the Oleaginous Yeast Rhodosporidium toruloides for Improved Resistance Against Inhibitors in Biomass Hydrolysates |
| title_short |
Engineering the Oleaginous Yeast Rhodosporidium toruloides for Improved Resistance Against Inhibitors in Biomass Hydrolysates |
| title_full |
Engineering the Oleaginous Yeast Rhodosporidium toruloides for Improved Resistance Against Inhibitors in Biomass Hydrolysates |
| title_fullStr |
Engineering the Oleaginous Yeast Rhodosporidium toruloides for Improved Resistance Against Inhibitors in Biomass Hydrolysates |
| title_full_unstemmed |
Engineering the Oleaginous Yeast Rhodosporidium toruloides for Improved Resistance Against Inhibitors in Biomass Hydrolysates |
| title_sort |
engineering the oleaginous yeast rhodosporidium toruloides for improved resistance against inhibitors in biomass hydrolysates |
| publisher |
Frontiers Media S.A. |
| publishDate |
2021 |
| url |
https://doaj.org/article/af28ce0462dd46f5878e16e570e617c8 |
| work_keys_str_mv |
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