从葡萄糖中使用工程化大肠杆菌在两步过程中新生合成布特雷辛
Lang Yin1, Hongxu Li1, Min Du1
1State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 211816, Jiangsu, China.
Synthetic and systems biotechnology
|March 12, 2026
概括
这项研究介绍了一种两步微生物过程,从葡萄糖中生产聚合物前体特素. 经过工程改造的大肠杆菌菌株取得了高产量和纯度,提供了可持续和高效的生物基生产方法.
科学领域:
- 生物技术是生物技术.
- 代谢工程是代谢工程.
- 可持续化学 可持续化学
背景情况:
- 普特雷辛是高性能聚合物的重要单体.
- 目前的微生物生产面临着在产量和效率方面的挑战.
- 可持续的合成路径对于工业应用至关重要.
研究的目的:
- 开发一种模块化,两步生物合成过程,从葡萄糖中提取putrescine.
- 为了提高微生物putrescine生产的产量和效率.
- 建立一个集成和可扩展的生物生产系统.
主要方法:
- 对于L-氨酸过度产生的大肠杆菌的代谢工程.
- 用动态溶解氧控制优化发酵过程.
- 全细胞催化对氨酸转化为氨酸的转化.
- 在催化过程中用于pH自调的现场二氧化碳生成.
- 下游分离用于高纯度的矿回收.
主要成果:
- 获得了97.6g/L的标位和0.52g/g的产量,用于l-氨酸的生产.
- 使用动态氧气控制提高了l-氨酸的生产率,达到2.03g/L·h.
- 达到了48.6g/L的普特雷辛标位,与0.26g/g的葡萄糖产量,创下了新生生物合成的纪录.
- 证明了可扩展到50升反应堆的可扩展性,产量一致.
- 通过下游加工获得99%纯度的铁素.
- 与传统方法相比,预计二氧化碳排放量将减少30%.
结论:
- 建立了一种高效的,综合的发酵-催化-分离工艺,用于生物基普特雷辛的生产.
- 开发的方法为生产这种有价值的胺提供了一种可行和可持续的替代方法.
- 该过程显示出产量,效率和环境影响的显著改善.
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