代谢工程和适应性实验室进化Kluyveromyces Marxianus的乳酸生产的乳酸生产
Jolien Smets1,2, Héctor Escribano Godoy1,2, Johanna Goossenaerts1,2
1VIB - KU Leuven Center for Microbiology, Gaston Geenslaan 1, Leuven, 3001, Belgium.
Microbial cell factories
|August 5, 2025
概括
这项研究对酵母Kluyveromyces marxianus进行了改造,以提高乳酸 (LA) 产量,实现高标位和产量. 改进的酵母有效地发酵了西洛斯,并且需要更少的中和,为可持续的生物塑料铺平了道路.
科学领域:
- 生物技术是生物技术.
- 微生物学 微生物学
- 生物化学 生化学
背景情况:
- 多乳酸 (PLA) 是一种关键的生物塑料,生物生产依赖于微生物发酵中的乳酸 (LA).
- 目前的LA生产方法面临昂贵的原料和高中和剂要求的挑战.
研究的目的:
- 探索耐酸酵母Kluyveromyces marxianus在改善乳酸 (LA) 生产方面的潜力.
- 为LA生物合成开发一个更可持续,更具成本效益的微生物平台.
主要方法:
- 选了168种不同的Kluyveromyces marxianus菌株,以确定最佳的底盘.
- 经过基因工程改造,为LA生产选择了10个品种.
- 在最佳菌株 (Km3) 上利用适应性实验室进化来进一步提高性能.
- 进行了基因组测序,以确定负责改善LA生产的遗传修饰.
主要成果:
- 经过工程改造的K. marxianus菌株Km3获得了高的LA标位 (120g L-1) 和产量 (0.81g g-1).
- 进化的菌株显示了降低中和剂的要求.
- 酵母有效地发酵了含有西洛斯的原料.
- 在SUA7基因的突变被确定为增强LA生产的原因.
结论:
- 克劳维罗米塞斯马克西安纳斯是一种有前途的微生物底盘,用于可持续的LA生产.
- 将基因工程和适应性进化与非传统微生物相结合,为开发卓越的微生物细胞工厂提供了一种强大的方法.
- 这项工作支持通过精密发酵,使用富含素的原料,进行精细化学品的商业生产.
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