相关实验视频
Updated: May 2, 2026

08:51
Monitoring Protein Adsorption with Solid-state Nanopores
Published on: December 2, 2011
13.1K
在固态纳米孔中展开的单分子蛋白质
1Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA. talaga@rutgers.edu
Journal of the American Chemical Society
|June 18, 2009
概括
单个化纳米孔通过分析转位过程中排除的体积来测量蛋白质折叠状态. 这种方法可以区分折叠,部分折叠和展开的蛋白质,揭示了蛋白质动力学和电展开的洞察力.
科学领域:
- 生物物理学的生物物理.
- 纳米技术 纳米技术
- 蛋白质科学 蛋白质科学
背景情况:
- 了解蛋白质的折叠和展开对于理解生物功能至关重要.
- 单分子技术为研究蛋白质转位等复杂的生物过程提供了高分辨率.
- 纳米孔技术为分析单个分子提供了一个平台.
研究的目的:
- 用化纳米孔研究单个蛋白质的折叠状态.
- 在转位过程中测量蛋白质的排除体积,以推断它们的构造状态.
- 探索电力对在纳米孔内展开的蛋白质的影响.
主要方法:
- 使用单化纳米孔装置进行转位测量.
- 使用DNA校准的转位信号来确定被排除的体积.
- 分析了β-乳糖球蛋白和含有histidine的素载体蛋白的转位信号.
- 应用生理学相关的电潜来诱导蛋白质展开.
主要成果:
- 排除的体积测量量量上与基于停滞转位的氨基酸部分体积的预测相匹配.
- 大多数转位蛋白被发现具有线性或循环形状.
- 电力被证明能够在相关条件下展开蛋白质.
- 纳米孔转位信号被证明足够敏感,可以区分蛋白质折叠状态.
结论:
- 单个纳米孔转位测量可以准确地确定蛋白质排除的体积,并推断折叠状态.
- 蛋白质转位动态受到内在电荷序列和外部电场的影响.
- 纳米孔分析为研究蛋白质结构变化和电展开机制提供了强大的工具.
相关概念视频
Protein Folding
112.3K
Overview
112.3K
Molecular Chaperones and Protein Folding
14.7K
The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...
The...
14.7K
Protein Folding
8.8K
Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
8.8K

