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一种利用途径模块化和辅因子再生的细胞合策略,用于3'-Sialyllactose的生物合成
Zimeng Zhang1,2, Hongtao Zhang1,2, Zhijie Wang1,2
1Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China.
Journal of agricultural and food chemistry
|July 9, 2025
概括
研究人员开发了一种新的全细胞催化方法,用于合成3'-sialyllactose (3′-SL),这是一种关键的人类牛奶寡糖. 这种方法达到78.03g/L的高标位,支持婴儿发育.
科学领域:
- 生物技术和代谢工程 生物技术和代谢工程
- 合成生物学 合成生物学
- 碳水化合物化学 碳水化合物化学
背景情况:
- 3 - 酸乳糖 (3′-SL) 是一种重要的化母乳寡糖,对婴儿发育和生理功能至关重要.
- 现有的3′-SL合成方法通常很复杂,可能无法用于工业生产.
研究的目的:
- 建立一个协同的全细胞催化系统,以实现3′-SL的高效生物合成.
- 优化工程微生物菌株和发酵条件,以最大限度地提高3'-SL的生产.
主要方法:
- 通过使用大肠杆菌和Saccharomyces cerevisiae的基因设计了一种多模块全细胞生物催化剂.
- 作为协同合成的基质,利用了pyruvate,N-acetylglucosamine,乳糖和cytidine-5-monophosphate.
- 优化诱导条件和基质剂量在工程化大肠杆菌 (JM109(DE3) 中,用于全细胞催化.
主要成果:
- 在优化诱导和基质剂量后,达到71.62 g/L的3′-SL标位.
- 在5L生物反应器中成功扩大了该过程,达到78.03g/L的最大3′-SL标位.
- 通过使用三种来自大肠杆菌和S. cerevisiae的模块证明了第一个协同3′-SL合成的报告.
结论:
- 开发的全细胞催化系统为3′-SL生产提供了高效和可扩展的途径.
- 这种生物合成方法具有产生用于婴儿营养和健康的功能性寡糖的巨大潜力.
- 这项研究突出了从不同的微生物宿主中结合酶的力量,用于复杂分子合成.
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