用于通过纳米机械作用双向调节酶活性的脂质人造区
Yu Zhao1, Shuliang Gao1, Donghui Song1
1Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, United States.
Journal of the American Chemical Society
|December 20, 2022
概括
研究人员使用人工隔间开发了一种新型的光控制酶活性系统. 这种光响应系统可以在没有酶修改的情况下可逆地开启/关闭酶功能,并提供广泛的应用.
科学领域:
- 生物技术和合成生物学
- 材料科学
- 酶工程
背景情况:
- 目前用于按需控制酶活性的方法,如光反应抑制剂或非抑制剂系统,具有局限性.
- 抑制剂是酶特异性的,具有狭窄的有效范围.
- 非抑制剂系统通常需要酶突变或修饰,导致不可逆转的活性损失.
研究的目的:
- 开发一种通用,对光敏感的双向酶活性控制系统.
- 创建一个模仿生物膜的人工隔间来封装和调节酶.
- 通过避免抑制剂和酶修饰来克服现有的酶控制方法的局限性.
主要方法:
- 使用亚博 (Azo) 脂质和辅助脂质制造基于脂质的人工容器.
- 使用可逆光异构化AZO脂质在UV/VIS光暴露时调节膜透性.
- 将酶封装在亚脂类区内,通过光诱导的透性变化控制它们的活性.
主要成果:
- 亚博脂体区显示膜透性的可逆光触发变化,允许基质进入和退出.
- 通过施加或移除紫外线/视光线,可以打开和关闭区内的酶活性.
- 由于不需要突变或修改,该系统在重复激活和抑制循环后,对封装酶活性的损失是微不足道的.
结论:
- 这种基于脂质的人造隔膜系统提供了一种通用且有效的光控制酶活性策略.
- 这种方法保留了酶的完整性和功能,与基于突变的方法不同.
- 这项技术在生物研究,诊断和精准医学方面有着潜在的应用.
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