通过将发酵代谢与呼吸道模块相结合,设计新的生物化学转化
Helena Schulz-Mirbach1,2, Jan Lukas Krüsemann1,2,3, Theofania Andreadaki2
1Max Planck Institute for Terrestrial Microbiology, Karl-von-Frisch-Str. 10, 35043, Marburg, Germany.
Nature communications
|August 7, 2024
概括
这项研究引入了一种新的有氧发酵方法,该方法使用氧气来克服微生物过程中的氧化还原平衡限制. 这一进步通过扩大基质-产品组合,使生物基化学品的高效生产成为可能.
科学领域:
- 生物技术是生物技术.
- 代谢工程是代谢工程.
- 微生物生理学 微生物生理学
背景情况:
- 由于产量高,无氧微生物发酵对于工业生物基生产至关重要.
- 氧化还原平衡的限制限制了传统发酵中的基质和产品的范围.
研究的目的:
- 设计和实施一种有氧发酵代谢,克服传统的氧化还原平衡约束.
- 通过将呼吸模块与发酵通路相结合,实现受控的呼吸发酵生长.
主要方法:
- 为有氧发酵设计了一种有义务发酵的大肠杆菌菌株.
- 引入了依赖子的甘3-酸盐脱酶以利用呼吸链重新平衡发酵.
- 导向发酵流向异布坦醇生产.
主要成果:
- 在工程化大肠杆菌中实现了葡萄糖到乳酸的有氧发酵.
- 证明了糖醇发酵到乳酸与电子转移到呼吸链.
- 成功地将代谢流转向从甘油中生产异芽醇.
结论:
- 开发了一种新的呼吸发酵方法,使用氧气进行氧化还原平衡.
- 这种方法通过克服基质产品限制,扩大了微生物发酵的范围.
- 该战略为高效和多功能生物基化学品生产提供了一个新的范式.
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