改进的蛋白相互作用模型预测了人类细胞系之间的复合体差异
Gary R Wilkins1, Jose Lugo-Martinez1, Robert F Murphy1
1Ray and Stephanie Lane Computational Biology Department, School of Computer Science, Carnegie Mellon University.
bioRxiv : the preprint server for biology
|November 1, 2024
概括
这项研究引入了一种新的计算方法来预测蛋白质与蛋白质相互作用 (PPI) 的强度,提高准确性和覆盖率. 该方法通过整合各种数据源来增强人类蛋白质组装图的映射.
科学领域:
- 计算生物学是一种计算生物学.
- 蛋白质组学是指蛋白质组学.
- 系统生物学 系统生物学
背景情况:
- 蛋白与蛋白相互作用 (PPI) 是细胞功能的基础.
- 实验PPI数据库已经显著增长,但面临着实验偏差和不完全覆盖等局限性.
- 需要计算方法来克服绘制蛋白质复合体的实验限制.
研究的目的:
- 开发一种新的计算方法来预测蛋白相互作用的强度.
- 为了解决以前的PPI预测方法的局限性,特别是不完整的特征集和蛋白质组覆盖.
- 为了提高人类蛋白质组装图的准确性和完整性.
主要方法:
- 来自异质来源的数据合并为蛋白质对的特征矩阵.
- 识别了最小特征分区,并提供了训练分类器的完整数据.
- 训练有素的分类器在特征分区上预测PPI概率和总分的加权预测.
- 利用基于图表的工具和集群算法来预测的概率,用于复杂的组装.
主要成果:
- 新方法准确预测已知和可能的PPI,优于目前的方法.
- 与现有的PPI预测方法相比,实现了更完整的蛋白质组覆盖.
- 使用预测的PPI概率组装蛋白质复合物的结果得到改善.
- 鉴定了PPI的细胞系特异性差异和使用三个人类细胞系特征的复杂形成.
结论:
- 开发的计算方法在预测蛋白质-蛋白质相互作用强度和组装蛋白质复合体方面取得了重大进展.
- 这种方法提高了人类蛋白质组装图的全面性和准确性.
- 该方法有可能揭示细胞类型特定的蛋白质相互作用动态.
相关概念视频
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
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
01:57Protein Complexes with Interchangeable Parts
2.5K
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
2.5K
01:49Conserved Binding Sites
4.2K
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...
4.2K