通过适应性实验室进化改善酵母发酵酵母Spathaspora passalidarum CMUWF1-2中的furfural耐受性
Thanyalak Saengphing1, Pachara Sattayawat1,2, Thitisuda Kalawil1
1Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand.
Microbial cell factories
|March 14, 2024
概括
适应性实验室进化增强了Spathaspora passalidarum的毛皮耐受性. 进化后的AF2.5菌株对,乙醇和HMF具有更好的耐受性,导致更快,更高的乙醇生产.
科学领域:
- 微生物学 微生物学
- 生物技术是生物技术.
- 生物化学工程 生物化学工程
背景情况:
- 斯帕萨斯波拉 (Spathaspora passalidarum) 是一种能够发酵基纤维素水解酸盐的酵母,特别是.
- 这种酵母对furfural表现出敏感性,furfural是基纤维素生物质加工中常见的抑制剂.
- 之前的工作分离了S. passalidarum CMUWF1-2与耐热性和没有检测到的葡萄糖抑制.
研究的目的:
- 为了提高S. passalidarum CMUWF1-2.2.的毛发性耐受性.
- 为了研究furfural耐受性改善对其他抑制剂耐药性和发酵性能的影响.
主要方法:
- 使用适应性实验室进化 (ALE) 方法,依次将酵母转移到介质中,增加毛皮素度.
- 进化菌株对,乙醇和5-基甲基甲 (HMF) 的耐受性与野生类型相比较.
- 分析了细胞内活性氧物种 (ROS) 积累和核染色素扩散,以了解耐受性的机制.
主要成果:
- 一个适应的菌株,AF2.5,已成功开发,显示显著更高的耐受性furfural,乙醇和HMF.
- 在furfural的存在下,AF2.5表现出两倍短的滞后阶段,使更高的乙醇标位在更短的时间内实现.
- 与野生类型相比,进化的菌株在毛性压力下显示出细胞内ROS积累和核色素扩散的减少.
结论:
- ALE是一种有效的技术,用于产生S. passalidarum.的耐菌株.
- 增强的菌株AF2.5提供了更好的乙醇和HMF耐受性以及优越的毛皮抗性.
- 这一发展对于从纤维素生物质中有效生产生物燃料至关重要.
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