调整蛋白质-蛋白质相互作用的尺度,改善了Martini 3在溶液中的灵活蛋白质
F Emil Thomasen1, Tórur Skaalum2, Ashutosh Kumar3,4
1Linderstrøm-Lang Centre for Protein Science, Department of Biology, University of Copenhagen, DK-2200, Copenhagen N, Denmark. fe.thomasen@bio.ku.dk.
Nature communications
|August 5, 2024
概括
在Martini 3模型中调整蛋白质-蛋白质相互作用可以改善内在无序蛋白质 (IDP) 和多域蛋白质的模拟. 这种精细化提高了溶液中的系统和脂质膜内的准确性.
科学领域:
- 生物分子建模模型
- 计算生物物理学的计算生物物理.
- 蛋白质动力学 蛋白质动力学
背景情况:
- 多域蛋白和内在无序蛋白 (IDP) 对于细胞功能至关重要.
- 描述这些灵活蛋白质的构造组合是具有挑战性的.
- 之前的研究表明,Martini 3模型在溶液中产生过于紧的蛋白质组合.
研究的目的:
- 研究Martini 3模型中的参数调整,以提高灵活蛋白质的模拟精度.
- 评估蛋白质-水和蛋白质-蛋白质相互作用强度对构造组合的影响.
- 评估溶液中的蛋白质和膜环境中的模型性能.
主要方法:
- 使用了马丁尼3粗粒度分子动力学模型.
- 系统地改变了蛋白质-水和蛋白质-蛋白质相互作用的强度.
- 将模拟结果与各种蛋白质系统的实验数据进行比较.
- 在溶液和膜环境中分析了蛋白质构成组合和结合特异性.
主要成果:
- 在Martini 3中降低蛋白质-蛋白质相互作用强度显著改善了对IDP和多域蛋白质实验数据的一致性.
- 调整蛋白质-水与蛋白质-蛋白质相互作用的"对称性"并不普遍存在,特别是对于膜系统.
- 重缩蛋白质-蛋白质相互作用更好地保持了蛋白质-脂质膜结合的特异性.
- 调整蛋白质-水相互作用的尺度更好地保留了跨膜螺旋体的寡合化.
结论:
- 降低蛋白质-蛋白质相互作用强度是提高Martini 3灵活蛋白质准确性的关键改进.
- 这种调整改善了在水和膜环境中对蛋白质的模拟.
- 这些发现为研究复杂的蛋白质系统提供了更可靠的计算工具.
相关概念视频
02:26Protein Networks
3.9K
An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
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,...
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,...
3.9K
02:04Protein-protein Interfaces
12.5K
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...
12.5K
01:33Proteomics
7.3K
A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term...
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term...
7.3K
01:25Protein Folding
7.9K
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...
7.9K