多酶级联合成罕见糖从糖在细菌亚细菌中的糖
Kangqing Fei1, Liqun Shen1, Xiao-Dong Gao2
1Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu, China.
Biotechnology journal
|December 26, 2024
概括
细菌细菌被设计为从糖醇中产生罕见的糖,达到创纪录的26.68g/L标位. 这种安全的全细胞转化方法为工业稀糖合成提供了具有成本效益的替代方案.
科学领域:
- 生物技术是生物技术.
- 代谢工程是代谢工程.
- 合成生物学 合成生物学
背景情况:
- 稀有糖是有价值的单糖,具有多种工业应用.
- 目前的生产方法,如酶合成,是昂贵和复杂的.
- 大肠杆菌,虽然用于罕见的糖合成,但提出了安全问题.
- 需要安全高效的微生物菌株来生产稀有糖.
研究的目的:
- 开发一种安全高效的全细胞生物转化系统,用于稀糖生产.
- 设计Bacillus subtilis作为罕见糖的生产底盘.
- 为了优化关键酶的表达,增强罕见糖的生物合成.
主要方法:
- 在 Bacillus subtilis 中,三个关键基因 (aldO,rhaD,yqaB) 的异质表达.
- 研究和优化不同的促进剂以增强酶表达.
- 用工程B. subtilis. 的方法将糖醇转化为罕见糖的全细胞转化.
- 为最大限度地提高罕见糖的产量,进行封装批量种植.
主要成果:
- 工程设计的B. subtilis成功地将糖醇转化为D-和D-.
- 优化酶表达导致最大产量标位为16.96 g/L.
- 料批发发酵实现了 26.68 g/L 罕见糖从甘油的记录标位.
- 从甘油中获得33.9%的高转换产量.
结论:
- 证明了一种高效且具有成本效益的全细胞生物转化方法,用于罕见糖的合成.
- 使用Bacillus subtilis建立了一个食品级生产平台.
- 开发的系统有可能满足日益增长的工业对罕见糖的需求.
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