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Updated: Jun 30, 2025

High-throughput Synthesis of Carbohydrates and Functionalization of Polyanhydride Nanoparticles

High-throughput Synthesis of Carbohydrates and Functionalization of Polyanhydride Nanoparticles

Published on: July 6, 2012

聚合和运输过程的协调优化,以提高外聚糖合物heparosanosan的产量

Shan Hu¹, Siyan Zhou¹, Yang Wang¹

¹The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China; The Science Center for Future Foods, Jiangnan University, Wuxi 214122, China; The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China.

Carbohydrate polymers

|March 17, 2024

概括

研究人员设计了Escherichia coli Nissle 1917 (EcN) 来增强肝素素的生物合成. 协同优化多糖合物聚合和运输显著提高了肝糖素的生产,在细胞外达到12.2g/L.

科学领域:

生物技术是生物技术.
代谢工程是代谢工程.
微生物发酵微生物发酵

背景情况:

肝素素是肝素生物合成的关键前体.
大肠杆菌尼斯尔1917 (EcN) 是一个有前途的底盘,用于heparosan生产.
了解细胞内多糖体运输对于提高产量至关重要.

研究的目的:

阐明KfiB在肝素转移中的作用.
设计EcN以提高细胞外肝素素的产生.
开发一个共优化策略,用于多糖生物合成和运输.

主要方法:

通过KpsT.研究了KfiB在多糖链转位中的功能.
构建了一个人工表达磁带 (KfiACB),具有优化的核糖体结合点 (RBS).
与ABC运输系统蛋白 (KpsTME) 共同过度表达的KfiACB,并评估了摇瓶和食批量培养中的产量.

主要成果:

确定了KfiB在促进KpsT介导的肝素转移中的作用.
用KfiACB磁带在摇瓶培养中达到0.77g/L的肝素.
通过共同过度表达KfiACB和KpsTME,增加了肝素的产生,达到1.03g/L (0.96g/L细胞外).
工程菌株在5L料批培养中产生了12.2g/L的肝素素 (11.2g/L细胞外).

结论:

证明了一种高效率的策略,以共同优化肝素聚合和运输.
开发的策略显著提高了工程 EcN 在细胞外肝素的产量.
这种方法可能适用于改善其他微生物多糖的生产.

关键词:

埃舍里奇亚大肠杆菌尼斯尔1917年细胞外分布细胞外分布肝炎和肝炎的治疗方法益生菌益生菌益生菌蛋白质的同定位蛋白质的同定位

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