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适应性实验室进化在一个新奇的平行震动pH-auxostat的演变
Burak Sarikaya1, Hendrik Bück1, Gino Pohen1
1AVT-Biochemical Engineering, RWTH Aachen University, Aachen, Germany.
Biotechnology and bioengineering
|June 27, 2024
概括
适应性实验室进化 (ALE) 通过新的连续平行震动pH-auxostat (CPA) 系统得到了增强. 这种方法快速选择了生长速度更快的酵母菌株,在生长速度上实现了高达4.8倍的改善.
科学领域:
- 生物技术是生物技术.
- 微生物工程 微生物工程
- 合成生物学 合成生物学
背景情况:
- 适应性实验室进化 (ALE) 对微生物菌株的发展至关重要.
- 传统的ALE方法包括批次或连续栽培,每个都有局限性.
- 将高吞吐量摇培养与连续发酵相结合,有利于ALE.
研究的目的:
- 开发一种新的连续平行摇动pH-auxostat (CPA) 系统.
- 为了整合平行摇培养和ALE的连续发酵的优势.
- 优化ALE以快速选择改进的微生物菌株.
主要方法:
- 开发了一个CPA系统,包括六个自主摇动反应器和实时pH控制.
- 非侵入性pH传感器点和可编程的模块控制稀释速率.
- 两种Ogataea polymorpha菌株使用化学定位和pH-auxostat方法进行培养.
主要成果:
- 该CPA系统使得在接近冲洗点的pH控制的稀释速率下能够进行连续的种植.
- 使用Chien-Hrones-Reswick (CHR) 方法优化PI控制器参数.
- 在CPA系统中,ALE为*O. polymorpha*菌株选择,其最大特异性增长率增加了4.8倍.
结论:
- CPA系统有效地将高吞吐量与ALE的连续发酵相结合.
- 这种新的方法显著加速了快速生长的微生物菌株的选择.
- 开发的方法对微生物菌株的发展和优化有价值.
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