开发利用糖糖的埃舍里希亚大肠杆菌尼斯尔1917年为高效的肝素生物合成
Yaozong Chen1, Zihua Wan1, Zheng-Jun Li1
1State Key Laboratory of Green Biomanufacturing, National Energy R&D Center for Biorefinery, and Beijing Key Laboratory of Green Chemicals Biomanufacturing, Beijing University of Chemical Technology, Beijing 100029, China.
Metabolites
|June 25, 2025
概括
工程化益生菌 (Escherichia coli Nissle 1917) 现在使用糖糖来生长,并产生高产的肝素素,一种肝素前体. 这促进了可持续的甘氨酸甘氨酸生物合成.
科学领域:
- 合成生物学 合成生物学
- 代谢工程是代谢工程.
- 微生物生物技术 微生物生物技术
背景情况:
- 肝素素是一种类似于肝素的多糖体,存在于细菌囊中.
- 肝素可以通过酶转化为生物活性肝素.
- 大肠杆菌尼斯尔1917 (EcN) 自然产生肝炎.
研究的目的:
- 设计EcN以利用糖糖用于生长和高产的肝素素生产.
- 开发一个可持续的平台,用于使用糖糖的甘氨酸甘氨酸生物合成.
主要方法:
- 基因工程 EcN 来表达糖酶基因 (sacA 或 spI).
- 代谢途径工程,以重定向碳流向肝素.
- 过度表达关键的肝素生物合成基因 (galU,kfiD,glmM).
主要成果:
- 工程 EcN 菌株使用糖糖实现了 131 mg/L 和 179 mg/L 的肝素标位.
- 代谢工程和基因过度表达导致最终的肝素位为622 mg/L.
- 证明了糖和糖醇在生长和生产方面的协同利用.
结论:
- 首先成功的工程 EcN 糖糖利用和增强的肝素素生产.
- 建立了基于糖糖的糖氨基酸糖的生物合成的基本策略.
- 突出了工程EcN在可持续生物制造中的潜力.
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