祖先序列重建加速非血铁依赖生物催化剂工程
José R Hernández-Meléndez1, Alexandra E Paton1, Jonathan C Perkins1
1†Department of Chemistry, ‡Life Science Institute, §Program in Chemical Biology, University of Michigan, Ann Arbor, Michigan 48109, United States.
ACS central science
|December 4, 2025
概括
祖先序列重建 (ASR) 揭示了用于生物催化剂工程的热稳定酶. 这些祖先蛋白质的工程产生了增强的稳定性,活性和更广泛的基质范围,用于合成化学应用.
科学领域:
- 生物催化剂和合成化学
- 酶工程和定向进化的指导进化.
- 生物技术和蛋白质科学 生物技术和蛋白质科学
背景情况:
- 非血红素铁依赖 (NHI) 酶是选择性氧化反应的有价值的生物催化剂.
- 由于现代酶的天生的稳定性,蛋白质工程经常面临局限性.
- 祖先序列重建 (ASR) 提供了一个识别进化稳定的酶变异的策略.
研究的目的:
- 探索ASR在识别热稳定的NHI酶中对蛋白质工程的有用性.
- 为了比较现代NHI酶与其重建的祖先的进化能力.
- 开发一种生物催化途径以使用工程化祖先NHI酶开发特罗波隆.
主要方法:
- 利用ASR重建祖先的NHI酶序列.
- 在实验室中进行了现代和祖先NHI酶的比较进化.
- 改造了祖先的NHI酶,以提高热稳定性,表达和活性.
- 评估工程变体的基质范围和催化效率.
主要成果:
- 与现代同类相比,祖先的NHI酶表现出优越的稳定性和可进化性.
- 改造后的祖先变体显示了增强的热稳定性和表达水平.
- 变种表明催化速率增加和基质范围更广泛.
- 通过使用工程酶,成功实现了特罗波的生物催化合成.
结论:
- ASR是一种有效的策略,用于挖掘强大的酶骨干,用于生物催化剂工程.
- 工程祖先的NHI酶加速了更稳定和合成有用的生物催化剂的开发.
- 这种方法克服了先天酶稳定性的局限性,使合成化学具有更广泛的应用.
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