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Ren K, Wang Q, Chen J, Zhang H, Guo Z, Xu M, Rao Z, Zhang X. Design-build-test of recombinant Bacillus subtilis chassis cell by lifespan engineering for robust bioprocesses. Synth Syst Biotechnol 2024; 9:470-480. [PMID: 38634000 PMCID: PMC11021899 DOI: 10.1016/j.synbio.2024.04.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 03/03/2024] [Accepted: 04/07/2024] [Indexed: 04/19/2024] Open
Abstract
Microbial cell factories utilize renewable raw materials for industrial chemical production, providing a promising path for sustainable development. Bacillus subtilis is widely used in industry for its food safety properties, but challenges remain in the limitations of microbial fermentation. This study proposes a novel strategy based on lifespan engineering to design robust B. subtilis chassis cells to supplement traditional metabolic modification strategies that can alleviate cell autolysis, tolerate toxic substrates, and get a higher mass transfer efficiency. The modified chassis cells could produce high levels of l-glutaminase, and tolerate hydroquinone to produce α-arbutin efficiently. In a 5 L bioreactor, the l-glutaminase enzyme activity of the final strain CRE15TG was increased to 2817.4 ± 21.7 U mL-1, about 1.98-fold compared with that of the wild type. The α-arbutin yield of strain CRE15A was increased to 134.7 g L-1, about 1.34-fold compared with that of the WT. To our knowledge, both of the products in this study performed the highest yields reported so far. The chassis modification strategy described in this study can Improve the utilization efficiency of chassis cells, mitigate the possible adverse effects caused by excessive metabolic modification of engineered strains, and provide a new idea for the future design of microbial cell factories.
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Affiliation(s)
- Kexin Ren
- Key Laboratory of Industrial Biotechnology of the Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, 214122, China
- Yixing Institute of Food and Biotechnology Co., Ltd, Yixing, 214200, China
| | - Qiang Wang
- Key Laboratory of Industrial Biotechnology of the Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, 214122, China
- Yixing Institute of Food and Biotechnology Co., Ltd, Yixing, 214200, China
| | - Jianghua Chen
- Key Laboratory of Industrial Biotechnology of the Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, 214122, China
| | - Hengwei Zhang
- Key Laboratory of Industrial Biotechnology of the Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, 214122, China
- Yixing Institute of Food and Biotechnology Co., Ltd, Yixing, 214200, China
| | - Zhoule Guo
- Key Laboratory of Industrial Biotechnology of the Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, 214122, China
| | - Meijuan Xu
- Key Laboratory of Industrial Biotechnology of the Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, 214122, China
- Yixing Institute of Food and Biotechnology Co., Ltd, Yixing, 214200, China
| | - Zhiming Rao
- Key Laboratory of Industrial Biotechnology of the Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, 214122, China
- Yixing Institute of Food and Biotechnology Co., Ltd, Yixing, 214200, China
| | - Xian Zhang
- Key Laboratory of Industrial Biotechnology of the Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, 214122, China
- Yixing Institute of Food and Biotechnology Co., Ltd, Yixing, 214200, China
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