通过使用工程化大肠杆菌 (Escherichia coli) 来有效地从耶路撒冷桃中生产乙素
Hao Zhang1, Hairui Tong1, Qiang Yin2
1State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, China; College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China.
Bioresource technology
|April 27, 2025
概括
这项研究利用大肠杆菌 (Escherichia coli) 来从耶路撒冷桃中的内氨酸中产生ectoine. 优化的代谢途径和发酵条件实现了高产量,证明了有价值化合物的非食品发酵方法.
科学领域:
- 生物技术是生物技术.
- 代谢工程是代谢工程.
- 工业微生物学 工业微生物学
背景情况:
- 埃克托因是一种有价值的 osmoprotectant,在化品和医学中具有应用.
- 耶路撒冷花仁素是一种未充分利用的,丰富的碳水化合物来源.
- 从非食品生物质中高效地微生物生产ectoine仍然是一个挑战.
研究的目的:
- 设计一种重组的大肠杆菌菌株,以从耶路撒冷桃中提升从耶路撒冷桃中提升的生殖素的产量.
- 优化新陈代谢途径,以改善基质利用和ectoine生物合成.
- 开发一种具有成本效益的非食品发酵工艺,用于生产高价值的生殖素.
主要方法:
- 大肠杆菌的模块化路径工程,包括促进物优化和基因集成.
- 优化胰岛素酸酶表达和下游代谢模块 (果糖运输,糖解,氧化供应).
- 使用原始胰岛素提取物和单谷氨酸盐残留物的发酵优化.
主要成果:
- 工程菌株ETC16与ΔiclR共同表达gapa,ppc和fruK,产生6.51g/L的ectoine (0.13g/g的胰岛素).
- 使用原始胰岛素和MSG残留物进行优化发酵,在7.5L发酵器中实现了35.60g/L的ectoine (0.36g/g的胰岛素).
- 显著改善了ectoine产量和基质转化效率.
结论:
- 成功的工程大肠杆菌的埃舍里奇亚大肠杆菌的高效的ectoine生产从耶路撒冷的土豆仁素.
- 建立了一个可行的非食品发酵策略,以生产高价值的ectoine.
- 强调利用农业副产品用于可持续生物生产的潜力.
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