伊斯蒂丁调节类纳米材料的类组合,并赋予类似酶的活性
Ye Yuan1,2,3, Lei Chen2, Lingfei Kong4
1Key Laboratory for Molecular Enzymology and Engineering, School of Life Sciences, Jilin University, Changchun, 130012, China.
Nature communications
|September 19, 2023
概括
胺调节的自我组装成纳米纤维,产生类似酶的活性. 这种在粉样β (Aβ) 纤维中由histidine驱动的催化可能通过增加活性氧物种 (ROS) 来解释阿尔茨海默病的病理学.
科学领域:
- 生物材料科学 生物材料科学
- 生物化学 生物化学
- 神经科学是一个神经科学.
背景情况:
- 粉样类的自我组装在新型纳米材料开发和病理过程中至关重要.
- 希斯蒂丁在调节组合和催化活性方面的作用仍然是一个令人感兴趣的领域.
研究的目的:
- 调查胺如何影响Fmoc二氨 (Fmoc-F-F) 的自我组装.
- 探索在组合中由histidine诱导的类似酶的催化特性.
- 了解西丁在粉样β (Aβ) 聚合和阿尔茨海默病 (AD) 病理学的影响.
主要方法:
- 使用Fmoc-F-F作为模型系统.
- 在histidine加入后分析结构变化 (β-sheet重新排列).
- 评估过氧化酶类催化活性和反应性氧物种 (ROS) 生成.
- 研究了Aβ光线组件及其与histidine存在和接近的相关性.
- 检查了细胞ROS水平和由Aβ纤维引起的神经元损伤.
主要成果:
- 希斯蒂丁的结合诱导了Fmoc-F-F中的β-片的重新排列,导致具有过氧化酶类活性的纳米纤维形成.
- 含有胺的Fmoc-F-F纳米纤维催化了ROS的产生.
- 与邻近的胺残留物组装的Aβ纤维具有相似的催化特性.
- 组装的Aβ细丝增加了细胞ROS和受损的神经元细胞,将聚合与病理联系起来.
结论:
- 希斯蒂丁作为粉样类自组合的关键调节剂,传递类似酶的催化功能.
- 这些发现为阿尔茨海默病中Aβ聚合的病理机制提供了洞察力.
- 用histidine调节的型纳米材料显示出新型催化应用的潜力.
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