对蛋白质结构预测方法 (CASP) 的批判性评估-第十五轮
Andriy Kryshtafovych1, Torsten Schwede2, Maya Topf3
1Genome Center, University of California, Davis, California, USA.
Proteins
|November 3, 2023
概括
深度学习方法在预测蛋白质结构,特别是蛋白质复合体方面取得了重大进展. 然而,古典方法对于RNA和蛋白质-连接体复合体预测仍然优越,突出了未来研究的领域.
科学领域:
- 计算结构生物学计算结构生物学
- 生物物理学的生物物理.
- 生物信息学是一种生物信息学.
背景情况:
- 从氨基酸序列预测蛋白质结构是结构生物学中的一个关键挑战.
- 结构预测的批判性评估 (CASP) 实验每两年评估一次在这个领域的进展.
- 之前的CASP实验,特别是CASP14,证明了深度学习对单个蛋白质结构预测的力量.
研究的目的:
- 总结2022年举行的CASP15实验的结果.
- 为突出深度学习驱动的蛋白质结构预测方面的进展.
- 评估各种方法的性能,用于预测单个蛋白质,蛋白质复合体,RNA结构和蛋白质 - 连接体复合体.
主要方法:
- 评估包括AlphaFold2在内的深度学习方法及其实现.
- 对各种结构预测任务的不同计算方法进行比较.
- 对计算结构的精度估计的分析.
主要成果:
- 深度学习方法,特别是基于AlphaFold2的方法,可以实现单个蛋白质结构的卓越准确性,尽管通常需要大量采样.
- 在使用深度学习计算蛋白质复合体的准确性方面出现了重大进展,尽管仍然无法匹配单个蛋白质的性能.
- 基于深度学习的准确性估计对于单个蛋白质和复合体是可靠的,在接口区域有轻微的限制.
- 经典方法在CASP15.15中优于深度学习对RNA和蛋白质连接体复合物的预测.
- 观察到深度学习的早期有希望的结果,用于预测宏分子结构的合奏.
结论:
- 深度学习继续推动蛋白质结构预测的重大进展,特别是在复杂的蛋白质中.
- 为了深度学习模型的最佳性能,需要进一步改进和采样策略.
- 经典方法在RNA和蛋白质 - 连接体相互作用等特定领域仍然具有竞争力和优势,这表明了未来的研究方向.
相关概念视频
01:24Protein Organization
6.5K
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....
6.5K
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
01:22Protein Folding
118.3K
Overview
118.3K
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
02:40Ligand Binding Sites
12.9K
Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
12.9K