嵌入双响应的聚合物@酶在有空洞空间的地质石化胺酸框架中,以提高其催化性能
Rubina Jabeen1,2, Yutong Liu1,3, Ji Liu1
1Beijing National Laboratory for Molecular Sciences; Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
ACS applied bio materials
|August 7, 2025
概括
一种新的刺激反应性聚合物和牺牲模板策略创建了空洞的极性伊米达酸框架-8 (ZIF-8) 复合材料. 这些复合物通过纳米封闭显著增强氨酸胺转移酶 (AAT) 酶活性和稳定性,显示生物应用的希望.
科学领域:
- 材料科学 材料科学 材料科学
- 生物催化剂是一种生物催化剂.
- 纳米技术 纳米技术
背景情况:
- 在多孔材料中的酶固定通常在保持催化活性,稳定性和对恶劣条件的耐受性方面面临挑战.
- 氧化伊米达酸框架-8 (ZIF-8) 为酶封装提供了一个有前途的多孔结构,但需要提高酶性能的策略.
- 响应刺激的聚合物可以提供对微环境的动态控制,潜在地改善酶功能.
研究的目的:
- 开发一种响应刺激的聚合物支和牺牲模板策略,用于制造空心ZIF-8复合材料.
- 调节酶构成自由,并产生纳米限制,以提高催化性能,耐受性和稳定性.
- 研究这些智能复合材料在生物系统中对酶活性评估的潜力.
主要方法:
- 通过可逆添加碎片化链转移聚合物合成热和pH响应的聚合物.
- 通过化学结合将氨酸氨基转移酶 (AAT) 固定在智能聚合物上.
- 制造空洞ZIF-8复合材料 (HSZIF-8),使用多元F-127作为牺牲模板和ZIF-8外在现场生长.
主要成果:
- 制造的智能聚合物@AAT@HSZIF-8复合材料在特定条件下 (45.0°C,pH4.5) 与自由AAT相比,具有13.92倍的催化活性.
- 智能聚合物充当"可调节开关",改变形态与温度和pH值,以创建纳米限制,从而提高酶性能.
- 这些复合材料表现出极好的抗恶劣pH值,加热和有机溶剂的稳定性,并成功地用于评估小鼠器官中的AAT活性.
结论:
- 该研究成功地展示了一种创新的策略,用于制造具有增强的催化活性和稳定性的酶载空心ZIF-8复合材料.
- 在MOF中整合刺激反应性聚合物和纳米限制对于提高酶性能至关重要.
- 这些基于MOF的智能载体显示出实际生物应用在真实生物系统中的巨大潜力.
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