代谢重编程和计算辅助的蛋白质工程,用于Pichia pastoris中高水平的de novo生物合成2-乙醇
Lijing Sun1, Suyun Liu1, Renjie Sun1
1State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, China.
Synthetic and systems biotechnology
|June 13, 2025
概括
微生物细胞工厂提供可持续的2-乙醇 (2-PE) 生产. 这项研究利用Pichia pastoris进行了增强的2-PE生物合成,通过合理的酶设计和途径优化实现了创纪录的7.10g/L标位.
科学领域:
- 生物技术是生物技术.
- 合成生物学 合成生物学
- 代谢工程是代谢工程.
背景情况:
- 2-乙醇 (2-PE) 是一种有价值的芳香化合物,广泛用于食品和化品.
- 2-PE的天然来源有限,需要使用替代生产方法.
- 微生物生物合成为2-PE生产提供了一个可持续和可扩展的替代方案.
研究的目的:
- 设计Pichia pastoris作为一个高效的细胞工厂,用于2-PE生物合成.
- 通过合理的酶设计和途径工程来增强代谢流向2-PE生产.
- 优化发酵条件以最大限度地提高2-PE标位和产量.
主要方法:
- 使用计算机辅助预测,合理设计甲酸脱碳酶KDC2.
- 增强石胺酸通路和实施动态调节.
- 集成控制的碳料和现场提取策略.
- 为了改善2-PE生产,Pichia pastoris的工程.
主要成果:
- 在工程菌株中实现了45.8倍的2-PE生产改善.
- 在优化发酵条件之前达到2.81g/L的2-PE标位.
- 获得了创纪录的微生物生产标位7.10g/L的2-PE,产量为0.14g/g的葡萄糖.
- 成功地减轻了酸抑制和产品毒性.
结论:
- 皮奇亚牧草是一种高效的细胞工厂,用于2-PE的绿色生物合成.
- 设计的策略显著提高了新陈代谢流量和生产效率.
- 这项研究为微生物2-PE生产设定了新的基准,为工业应用铺平了道路.
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