代和突变发生加速了酶立体选择性的实验室演变:与传统方法的严格比较
Manfred T Reetz1, Shreenath Prasad, José D Carballeira
1Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany. reetz@mpi-muelheim.mpg.de
Journal of the American Chemical Society
|June 12, 2010
概括
代和突变发生 (ISM) 显著增强了酶进化的立体选择性和稳定性. 这种方法被证明比以前的技术更有效,用于定向进化Pseudomonas aeruginosa lipase.
科学领域:
- 生物技术是生物技术.
- 酵素工程是什么? 酶工程是什么
- 分子生物学分子生物学
背景情况:
- 定向进化对于改善酶特性,如立体选择性和热稳定性至关重要.
- 对不同酶进化方法的比较研究对于优化实验室进化策略至关重要.
- 代和突变发生 (ISM) 在加速定向进化方面表现有前途,但需要严格的比较分析.
研究的目的:
- 与其他定向进化方法相比,严格评估代和突变发生的疗效.
- 评估ISM在增强模型酶Pseudomonas aeruginosa lipase的立体选择性方面的表现.
- 调查ISM效率的根本原因,包括潜在的表性影响.
主要方法:
- 代和突变发生 (ISM) 的应用在Pseudomonas aeruginosa lipase上.
- 使用进化的脂酶,使用奇拉性的立体选择性水解运动分辨率.
- 选大约1万种变异剂,以评估酶的酶选择性.
- 与以前的方法 (如易出错的PCR,热点突变发生和DNA混杂) 相比,ISM疗效的比较.
主要成果:
- 通过使用ISM,实现了Pseudomonas aeruginosa脂酶的前所未有的反选择性 (E = 594).
- 与所有先前记录的系统努力相比,ISM的效率显著更高.
- 积极的表观性效应被认为是促进ISM性能增强的关键因素.
结论:
- 代和突变发生 (ISM) 是加速酶导向进化的高效策略.
- 在提高酶立体选择性方面,ISM显著优于易出错的PCR和DNA混合等传统方法.
- 该研究强调了在酶工程策略中考虑表皮性相互作用的重要性.
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