通过De Novo方法嵌入酶在金属有机框架中防止展开
Fu-Siang Liao1,2, Wei-Shang Lo2, Yu-Shen Hsu2
1School of Physical Science and Technology, ShanghaiTech University , Shanghai 201210, China.
Journal of the American Chemical Society
|May 2, 2017
概括
在金属有机框架 (MOF) 中嵌入的酶在恶劣条件下表现出增强的稳定性和功能. 这种MOF封装可以保护像catalase (CAT) 这样的酶免受尿素和热量的变性.
科学领域:
- 生物化学
- 材料科学
- 纳米技术
背景情况:
- 酶是重要的生物催化剂.
- 酶的稳定性通常受到环境条件的限制.
- 金属有机框架 (MOF) 为封装提供可调节的多孔结构.
研究的目的:
- 研究MOF封装的酶的增强稳定性.
- 在变性条件下评估嵌入式催化酶 (CAT) 的功能性保存.
- 了解MOF在酶结构完整性中的作用.
主要方法:
- 将新型酶 (CAT) 封装成热解性意达酸 (ZIF-90和ZIF-8).
- 嵌入式和自由的CAT暴露在变质条件下 (6M尿素,80°C).
- 用于测量酶功能的活性测定和光光谱测定结构结构.
主要成果:
- 嵌入式CAT在6M尿素 (1.30 × 10−3s−1) 和80°C (1.05 × 10−3s−1) 中保持显著活性.
- 在相同的变质条件下,自由CAT表现出不可检测的活性.
- 光光谱显示嵌入式CAT与自由CAT相比结构变化较小.
结论:
- 在MOF中的酶封装显著提高了稳定性和功能寿命.
- MOF的微晶封闭限制了酶的移动性,保持了结构和活性.
- 这种方法为开发强大的生物催化剂提供了有前途的策略.
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