乙生成到乙生成:通过减少性酸盐吸收促进NADH氧化
Soyoung Oh1, Jiyeong Jeong2, Byeonghyeok Park3
1School of Environment and Energy Engineering, Gwangju Institute of Science and Technology, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 61005, Republic of Korea; Research Center for Innovative Energy and Carbon Optimized Synthesis for Chemicals, Gwangju Institute of Science and Technology, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 61005, Republic of Korea.
欧细菌callanderi KIST612利用降解性酸盐吸收来生产丁酸盐. 工程乙醇生产转移了新陈代谢,增强了NADH氧化和CO利用,以改善合成气生物炼油应用.
科学领域:
- 微生物学 微生物学
- 代谢工程是代谢工程.
- 合成生物学 合成生物学
背景情况:
- 包括Clostridium spp.在内的乙原体具有显著的代谢灵活性.
- 欧细菌callanderi KIST612使用一氧化碳 (CO) 产生n-酸盐,但其途径尚不清楚.
- 与丁酸盐形成相关的减少酸盐吸收通过NADH氧化提供了生理上的优势.
研究的目的:
- 为了阐明Eubacterium callanderi KIST612.12中的丁酸盐生产途径.
- 为了设计一种代谢转变,从乙酸生成到乙醇生成.
- 为了提高一氧化碳 (CO) 的氧化和总体生产率在合成气的生物炼油厂.
主要方法:
- 对Eubacterium callanderi KIST612进行基因工程,以引入一种乙醇生产途径.
- 在一氧化碳 (CO) 和乙酸盐条件下对野生型和突变菌株进行比较分析.
- 代谢流量分析以确定路径转移和生理优势.
主要成果:
- E. callanderi KIST612表现出与减少酸盐吸收相关的酸盐生产.
- 工程突变者将新陈代谢从乙生成转移到乙生成,停止酸盐的生产和乙酸盐的吸收.
- 代谢转变增强了NADH氧化,CO氧化和整体生产力.
结论:
- 减少酸盐的吸收是E. callanderi KIST612酸盐生产的一个关键特征.
- 代谢工程向乙醇生成优化NADH氧化和CO利用.
- 这种代谢重编程为基于合成气的高效生物炼油厂提供了一个有希望的战略.
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