1. Consolidated bioprocessing of cassava starch into butyric acid and butanol by engineered Clostridium butyricum SCUT 620.
- Author
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Fu H, Li X, Guo X, Yang D, Nan C, Cheng J, Du H, Shen M, and Wang J
- Subjects
- Electroporation methods, Biotechnology methods, Metabolic Engineering methods, Hydrolysis, Manihot metabolism, Clostridium butyricum metabolism, Starch metabolism, Butyric Acid metabolism, Butanols metabolism
- Abstract
Clostridium butyricum SCUT 620, a promising biorefinery chassis, has been demonstrated to efficiently utilize monosaccharides, disaccharides, and polysaccharides for butyric acid production. However, the absence of genetic manipulation tools has restricted its further development and application. For the first time, an efficient electroporation method for C. butyricum SCUT 620 was developed based on the analysis of the restriction-modification system and in vivo methylation. The highest electrotransformation efficiency reached 785 transformants/μg DNA after optimizing electroporation parameters. As a proof of concept, C. butyricum SCUT 620 was genetically modified to improve starch hydrolysis and butyrate tolerance, and to enable the synthesis of a new product, butanol, using non-grain biomass cassava starch. This study paves the way for the metabolic engineering of C. butyricum SCUT 620, with the objective of achieving various substrates utilization and chemicals production., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier Ltd. All rights reserved.)
- Published
- 2025
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