用AlphaFold和Rosetta进行离子运动质谱导向建模 改善蛋白质复杂结构预测
bioRxiv : the preprint server for biology
|February 27, 2026
概括
这项研究将离子移动性质谱法 (IM-MS) 与AlphaFold和Rosetta集成,以增强蛋白质复杂结构预测. 新方法提高了蛋白质组合建模的准确性,克服了现有工具的局限性.
科学领域:
- 结构生物学是结构生物学.
- 计算生物学是一种计算生物学.
- 生物物理学的生物物理.
背景情况:
- 离子移动性质谱 (IM-MS) 通过碰撞截面 (CCS) 提供了对蛋白质大小和形状的见解,但缺乏原子分辨率.
- AlphaFold在单质蛋白质结构预测方面表现出色,但在准确地建模蛋白质复合体方面面临挑战.
研究的目的:
- 开发一种综合计算方法,将IM-MS数据与AlphaFold和Rosetta结合起来,以改进蛋白质复杂结构预测.
- 通过利用实验结构约束来提高蛋白质组合建模的准确性.
主要方法:
- 整合了来自IM-MS的实验碰撞横截面 (CCS) 数据.
- 使用AlphaFold进行子单位结构预测,Rosetta通过对接管道进行复杂的组装.
- 开发了一种新的评分功能,以评估预测的蛋白质复合物的质量.
主要成果:
- 与AlphaFold-Multimer相比,68%的测试蛋白质复合体中 (26在38) 改善了根平均平方偏差 (RMSD) 值.
- 实现了显著的准确性改进,16个复合体从>4 Å RMSD过渡到<4 Å RMSD.
- 证明了加强蛋白质复合体建模的强大策略.
结论:
- 集成的IM-MS,AlphaFold和Rosetta方法有效地改进了蛋白质复杂结构预测.
- 这种方法提供了一个强大的解决方案,可以克服蛋白质复合物的组装建模的局限性.
- 该战略为复杂系统的计算结构生物学提供了显著的进步.
相关概念视频
Protein Folding
128.9K
Overview
128.9K
Protein Folding
11.9K
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...
11.9K
Protein Organization
9.8K
Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
The primary structure of a protein is its amino acid sequence....
The primary structure of a protein is its amino acid sequence....
9.8K
Proteomics
10.0K
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...
10.0K
Protein Networks
4.6K
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,...
4.6K


