计算和实验方法来量化受限条件下的蛋白质结合相互作用
Deborah Leckband1, Daniel K Schwartz2, Yinghao Wu3
1Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois; Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois; Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois.
新的方法量化了拥挤环境中的蛋白质相互作用,揭示了增强细胞粘附的干林聚类和合作性. 这些方法将粘附蛋白跨尺度的结合动力学桥接起来.
科学领域:
- 生物物理学的生物物理.
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 拥挤的环境和监禁显著改变了细胞接触时的粘附蛋白相互作用.
- 现有的实验和理论方法在这些复杂的环境中难以准确量化蛋白质结合常量.
研究的目的:
- 引入用于在拥挤的膜环境中量化蛋白质结合动力学的新方法.
- 研究 cis (侧面) 和 trans (粘合性) 阴素相互作用在细胞间粘附中的作用.
主要方法:
- 开发和应用单分子光共振能量转移 (smFRET) 和单分子跟踪.
- 使用动力蒙特卡洛 (KMC) 模拟与cis cadherin相互作用的现实模型.
- 扩展smFRET测量以分析膜结处的cis和transcadherin相互作用.
主要成果:
- 直接成像的结合/解结合速率的膜绑定cadherins.
- 检测 cis cadherin 相互作用对于膜聚类至关重要,这些相互作用在溶液中以前没有被观察到.
- 鉴定cis和transcadherin结合之间的意想不到的合作性,增强细胞间粘附动力学.
结论:
- 开发的方法在复杂,拥挤的环境中成功量化蛋白质结合动力学.
- 提出了一项战略,以跨越不同长度尺度的蛋白质结合动力学.
- 这些方法不仅适用于卡德林,还适用于其他细胞间粘附蛋白.
更多相关视频
11:38Quantifying the Binding Interactions Between CuII and Peptide Residues in the Presence and Absence of Chromophores
Published on: April 5, 2022
06:39Author Spotlight: Characterization of Low-Affinity Protein Interactions in Solution Using MassFluidix Technology
Published on: January 26, 2024
相关概念视频
Protein-Drug Binding: Determination Methods
Indirect methods involve isolating the bound drug from its free form in biological samples such as blood, serum, or plasma. These techniques aim to measure the percentage of drugs bound to proteins. Equilibrium dialysis is a commonly used method where the free drug concentration at equilibrium is measured by separating the bound...
The Equilibrium Binding Constant and Binding Strength
Protein-protein Interfaces
Conserved Binding Sites
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
Ligand Binding Sites
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
Protein Networks
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
