蛋白质结合域的分布和相对大小协同影响蛋白质-RNA混合物的相分离
Xubiao Ji1, Huijun Jiang1, Zhonghuai Hou1
1Hefei National Research Center for Physical Sciences at the Microscale and Key Laboratory of Precision and Intelligent Chemistry, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
The journal of physical chemistry. B
|September 8, 2025
概括
蛋白质结合域的分布和大小在蛋白质-RNA混合物中显著影响液态-液态相分离 (LLPS). 稀疏分布的域在小蛋白质中有利于LLPS,而密集的域则有助于更大的蛋白质.
科学领域:
- 生物物理学的生物物理.
- 分子生物学分子生物学
- 计算化学计算化学
背景情况:
- 多价值蛋白-蛋白相互作用对于液态-液态相分离 (LLPS) 是至关重要的.
- 这种LLPS驱动生物分子凝聚物的形成,这些生物分子凝聚物是必要的细胞结构.
- 了解影响LLPS的因素是理解细胞组织的关键.
研究的目的:
- 系统地研究蛋白质结合域 (PBD) 的空间分布和大小对LLPS的影响.
- 探索这些因素如何影响蛋白质-RNA凝聚物形成.
- 在复杂的生物混合物中阐明控制LLPS的机制.
主要方法:
- 为了模拟,利用了一个不一致的粒子聚合物模型.
- 研究了球形蛋白质和RNA单链的混合物.
- 系统地改变了PBD分布 (密切或稀疏) 和蛋白质大小.
主要成果:
- LLPS的行为取决于PBD分布和蛋白质大小之间的相互作用.
- 稀疏分布的PBD在小蛋白质中有利于LLPS,在RNA周围形成多层集群.
- 密集包装的PBDs在更大的蛋白质中促进LLPS,有利于双层密集集群.
结论:
- PBDs的空间布局和大小是蛋白质-RNA LLPS的关键决定因素.
- 结果显示,在不同的PBD分布和尺寸条件下形成的缩物结构不同.
- 这项工作提供了对蛋白质-RNA相分离背后的分子机制的见解.
相关概念视频
Factors Affecting Protein-Drug Binding: Protein-Related Factors
528
Drug binding to proteins is a key aspect of pharmacokinetics and can influence a drug's distribution, absorption, and elimination in the body. Several factors, including the drug's physiochemical properties, protein concentration, disease states, and the number of binding sites on the protein, influence this process.
The physicochemical properties of a drug play a significant role in its ability to bind to proteins. Lipophilic drugs, which dissolve in fats, oils, and lipids, can be...
The physicochemical properties of a drug play a significant role in its ability to bind to proteins. Lipophilic drugs, which dissolve in fats, oils, and lipids, can be...
528
Mechanisms of Membrane Domain Formation
3.8K
Different physical properties of lipids and proteins allow them to localize and form distinct islands or domains in the membrane. Some membrane domains are formed due to protein-protein interactions, whereas others are formed due to the presence of specific lipids such as sphingolipids and sterols—for example, large proteins, such as bacteriorhodopsin, aggregate and create distinct domains.
Another mechanism for membrane domain formation involves membrane proteins interacting with...
Another mechanism for membrane domain formation involves membrane proteins interacting with...
3.8K
Membrane Domains
7.0K
The membrane domains concentrate specific lipids and proteins at one place within the membrane, which helps in cell signaling, adhesion, and other critical cellular processes. These domains can differ in size, composition, function, and lifespan.
Protein Domains
The membrane comprises a group of distinct proteins responsible for carrying out a cell's specific function. For example, the plasma membrane of the human sperm, or a single germ cell, contains a unique set of proteins in the...
Protein Domains
The membrane comprises a group of distinct proteins responsible for carrying out a cell's specific function. For example, the plasma membrane of the human sperm, or a single germ cell, contains a unique set of proteins in the...
7.0K
Factors Affecting Protein-Drug Binding: Drug-Related Factors
454
Drug binding to proteins is a complex phenomenon influenced by various drug-related factors, each playing a significant role in the interaction between drugs and proteins within the body.
One crucial factor in drug-protein binding is the drug's lipophilicity or its affinity for fat. More lipophilic drugs tend to have higher binding extents. For example, highly lipophilic drugs like cloxacillin exhibit substantial protein binding, with as much as 95% of the drug binding to proteins. In...
One crucial factor in drug-protein binding is the drug's lipophilicity or its affinity for fat. More lipophilic drugs tend to have higher binding extents. For example, highly lipophilic drugs like cloxacillin exhibit substantial protein binding, with as much as 95% of the drug binding to proteins. In...
454
Conserved Binding Sites
5.0K
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...
5.0K
Protein Diffusion in the Membrane
5.5K
Proteins show rotational as well as lateral diffusion across the membrane. The lateral diffusion of proteins was confirmed through the cell fusion experiment where mouse and human cells were fused, resulting in hybrid cells. When the human and mouse cells fused, the specific membrane proteins on human and mouse cells were marked with the red and green-fluorescent markers, respectively. Initially, the red and green fluorescence was located on the respective hemisphere of the cell. As time...
5.5K


