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用Clostridium autoethanogenum LAbrini在动生物反应器中的自营和混合的批处理过程,连续加气

Anne Oppelt¹, Tran Yen Nhi Nguyen¹, Yaodan Zhang¹

¹Chair of Biochemical Engineering, School of Engineering and Design, Technical University of Munich, Bolzmannstr. 15, 85748 Garching, Germany.

|January 28, 2026

概括

拉布里尼 (Clostridium autoethanogenum LAbrini) 有效地同时转化合成气和糖. 这种工程菌株在混合养过程中表现出增强的生长和酒精生产,为改善生物燃料生产提供了基础.

科学领域:

微生物生物技术微生物生物技术
合成生物学合成生物学
代谢工程是代谢工程.

背景情况:

合成气发酵面临着局限性,但同时转化合成气和糖是一种有希望的解决方案.
通过适应性实验室进化开发的Clostridium autoethanogenum LAbrini表现出增强的自营性性能.
培养前的策略显著影响C. autoethanogenum LAbrini在混合营养环境中的生长和代谢活动.

研究的目的:

评估C. autoethanogenum LAbrini对同步合成气和糖代谢的混合营养能力.
为了比较C. autoethanogenum LAbrini在各种混合营养条件下的生长和产品形成.
评估使用这种工程菌株生产酒精和其他减少产品的潜力.

主要方法:

在控制的生物反应器中在自营和混合的条件下培养C. autoethanogenum LAbrini.
不同糖的代谢 (D-果糖,D-糖,L-阿拉比诺糖) 与CO一起由工程菌株进行.
在不同的培养前策略下分析生长,生物质形成和酒精生产 (乙醇,D-2,3-butanediol, meso-2,3-butanediol).

主要成果:

所有混合养的批量工艺都导致增长和产品形成比自养工艺更快.
使用D-果糖的异质培养前培养产生了优异的酒精产量 (10.7g L-1乙醇,3.2g L-1 D-2,3-butanediol).
用L-arabinose进行的自培前培养导致超过13g的L-1总酒精形成,其中在混合变异过程中仅产生Meso-2,3-butanediol.

结论:

在混合型批处理过程中,C. autoethanogenum LAbrini表现出与野生型菌株相比显著的改进.
这种工程菌株有效地同时代谢合成气和各种糖.
这种菌株为进一步的基因工程提供了坚实的基础,以优化减少产品的生产.

关键词:

克洛斯特里迪亚自动乙原体 LAbrini LAbrini 这就是D-果糖.D-克西洛斯的使用方法对于L-阿拉比诺糖来说,作为一个辅助性otrophy.一氧化碳的转化转换.乙醇乙醇是一种梅索-2,3-布坦二醇的使用方法混杂性变异性 (Mixotrophy) 是一种变异性.合成气发酵过程中的发酵.

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