针对细胞外碳的酒精发酵的合理设计
Daisuke Watanabe1, Mikiya Kawashima2, Naoya Yoshioka2
1Division of Biological Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Nara, Japan. watanabe.daisuke@bs.naist.jp.
NPJ science of food
|July 21, 2023
概括
工业酵母繁殖是很困难的. 这项研究表明,静止酵母菌株的细胞壁加厚会通过消耗碳来源来阻碍发酵,从而提供了一种新的合理设计方法.
科学领域:
- 生物化学 生物化学
- 微生物学 微生物学
- 工业生物技术 工业生物技术
背景情况:
- 用于工业性酒精发酵的育种酵母是具有挑战性的,因为缺乏体内修饰方法.
- 了解调节发酵效率的细胞机制对于优化工业流程至关重要.
研究的目的:
- 研究酵母静止期间细胞壁合成在调节发酵能力中的作用.
- 确定用于提高酒精发酵的酵母菌株合理设计的策略.
主要方法:
- 酵母细胞壁组成的分析,特别是静止期间的1,3-β-葡萄糖合成.
- 测量细胞质碳源的可用性和糖溶性流量.
- 改造酵母菌株发酵性能的评估.
主要成果:
- 通过1,3-β-葡萄糖合成介导的静态特异性细胞壁加厚被发现显著损害了细胞发酵能力.
- 这种损伤归因于细胞质碳源被厚化的细胞壁封存.
- 该研究提供了细胞壁动态和发酵期间代谢调节之间的机制联系.
结论:
- 在静止酵母中细胞壁的加厚会通过耗尽细胞质碳资源来对抗发酵.
- 这一发现为通过合理设计改善酵母菌株提供了一个新的目标.
- 这项研究有助于加强糖分的控制,使工业酒精发酵更有效.
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