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开发一种粉发酵的Zymomonas mobilis菌株,用于生产生物乙醇

Yingchi Wei¹, Jia Li², Changhui Wang¹

¹Institute of Synthetic Biology, School of Life and Technology, Wuhan Polytechnic University, Wuhan, 430023, China.

Microbial cell factories

|November 10, 2024

概括

工程Zymomonas mobilis现在可以使用表面显示的alpha-amylase发酵粉. 这一突破增强了可再生生物质生物燃料的生产,使乙醇产量增加了100%以上.

科学领域:

生物技术是生物技术.
合成生物学合成生物学
微生物工程微生物工程

背景情况:

使用微生物的生物炼油厂为生物燃料和生物化学品生产提供了可持续的替代方案.
齐莫莫纳斯莫比利斯 (Zymomonas mobilis) 是一个工业上重要的生物生产微生物,因为它具有GRAS地位和高乙醇生产率.
由于Z. mobilis的基质利用有限,因此限制了其在生物炼油厂中的应用.

研究的目的:

为了设计Zymomonas mobilis用于粉的直接发酵.
为了提高Z. mobilis的基质范围,以实现经济高效的生物生产.
开发一个精简的同时糖化和发酵 (SSF) 过程.

主要方法:

截断的冰核蛋白InaK与alpha-amylase的融合用于Z. mobilis.表面显示.
使用西方斑点和流动细胞计测方法确认氨酶表面局部化.
评估SSF过程中的全细胞酶活性和性能.

主要成果:

在重组Z. mobilis上成功地实现了活性α-氨酶的表面显示.
改造品种有效地将粉化成寡糖.
在SSF下,5%的粉介质中达到13.61g/L的最大乙醇标位,与对照组相比增加了111.0%.

结论:

伊纳K与α-氨基酶的融合使得Z. mobilis的表面显示和活性有效.
这一策略允许从粉作为唯一的碳来源进行具有成本效益的生物生产.
工程设计的Z. mobilis作为可再生生物质可持续生物生产的宝贵底盘.

关键词:

齐莫莫纳斯的移动性生物炼油厂是一个生物炼油厂.单元格显示器显示显示器燃料乙醇是一种燃料.冰核化蛋白质是冰核化的蛋白质.

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