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工程大肠杆菌MG1655以高效生产3-Deacyl-4'-单酸脂A

Zhen Wang^1,2, Aizhen Zhao^1,2, Jun Qiao^1,2

¹State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China.

Journal of agricultural and food chemistry

|September 1, 2023

概括

工程Escherichia coli产生单酸脂A,这是一个关键的辅助剂. 这项研究详细介绍了为高效工业生产这种有价值化合物的基因改造.

科学领域:

生物技术是生物技术.
微生物工程微生物工程
免疫学免疫学免疫学

背景情况:

来自沙门氏菌的单酸脂A (MPLA) 明尼苏达州R595是一种广泛使用的辅助剂.
大肠杆菌自然产生脂质A,但具有不同的结构.
需要MPLA的高效和可扩展的生产.

研究的目的:

为了设计Escherichia coli MG1655以有效地生产单酸脂A.
开发一个理想的主机,用于MPLA的工业规模制造.

主要方法:

系统删除126个与膜,鞭毛和ECA生物合成相关的基因.
进一步删除参与脂运输,碳水化合物运输和脂质A修饰的基因.
过度表达特定基因 (lpxE,pagP,pagL) 和逐步删除fabI.
料批发发酵以评估生产产量和识别MPLA物种.

主要成果:

工程化大肠杆菌菌株MW021/pTEPL在发酵26小时后产生了85.31毫克/升的脂类A种.
主要产品是两个特定的单酸脂A物种:3-deacyl-2-acyloxyacyl-4'-单酸脂A和3-deacyl-4'-单酸脂A.
构造的大肠杆菌菌株在MPLA生产中表现出高效率.

结论:

工程化大肠杆菌菌株MW021/pTEPL是工业生产单酸脂A的有希望的候选者.
这项研究为可扩展的MPLA制造提供了一个强大的平台.
开发的菌株有助于经济高效地生产一种关键的免疫辅助剂.

关键词:

埃舍里希亚大肠杆菌 (Escherichia coli) 是一个大肠杆菌.在MPL中,MPL是MPL.脂质A 脂质A 是一种脂质.单酸脂A是一种单酸脂

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