兰醇通过与疏水二元化接口结合来破坏人类γD-晶体的聚合
Hongsuk Kang1,2, Zaixing Yang3, Ruhong Zhou1,2
1Institute of Quantitative Biology, Department of Physics , Zhejiang University , Hangzhou 310027 , China.
Journal of the American Chemical Society
|June 20, 2018
概括
通过与人类的D晶体结合,防止和逆转白内障的形成. 这种类固醇化合物对特定部位具有强烈的亲和力,抑制蛋白质聚合和视力受损.
科学领域:
- 生物化学
- 眼科 眼科
- 计算生物学
背景情况:
- 白内障是视力丧失的主要原因,
- 导致白内障的精确机制尚未完全理解.
- 兰醇是一种天然的类固醇,在预防和逆转白内障形成方面具有潜力.
研究的目的:
- 研究兰醇对人类玛D晶体 (HγD-Crys) 聚合的预防作用.
- 使用计算方法阐明兰醇和HγD-Crys之间的分子相互作用.
主要方法:
- 全原子分子动力学 (MD) 模拟.
- 自由能量扰动 (FEP) 的计算.
- 用于结合自由能量比较的化学转换.
主要成果:
- 兰醇优先结合HγD-Crys的疏水二聚化接口,特别是C端.
- 兰醇对HγD-Crys的结合亲和力比自身的结合亲和力更强.
- 兰醇的结合比胆固醇更有利,这表明类固醇分子几何与结合亲和力之间存在关联.
结论:
- 通过特定的结合相互作用,兰醇有效抑制HγD-Crys的聚合.
- 这些发现支持兰醇在治疗白内障方面的治疗潜力.
- 类固醇的分子结构影响其预防晶体聚合的有效性.
相关概念视频
Protein-protein Interfaces
14.8K
Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...
14.8K
Protein-Protein Interfaces
4.5K
4.5K
Conserved Binding Sites
5.2K
Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
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...
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...
5.2K
Cooperative Binding of Transcription Regulators
7.4K
Transcriptional regulators bind to specific cis-regulatory sequences in the DNA to regulate gene transcription. These cis-regulatory sequences are very short, usually less than ten nucleotide pairs in length. The short length means that there is a high probability of the exact same sequence randomly occurring throughout the genome. Since regulators can also bind to groups of similar sequences, this further increases the chances of random binding. Transcriptional regulators form...
7.4K
Polymer Classification: Crystallinity
4.0K
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
4.0K
The Equilibrium Binding Constant and Binding Strength
15.1K
The equilibrium binding constant (Kb) quantifies the strength of a protein-ligand interaction. Kb can be calculated as follows when the reaction is at equilibrium:
15.1K


