绘制结构形成的不同序列,区分小蛋白质的多重折叠路径
Sandhya Bhatia1,2, Guruswamy Krishnamoorthy3, Jayant B Udgaonkar1,2
1National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bengaluru 560 065, India.
Journal of the American Chemical Society
|January 12, 2021
概括
蛋白质折叠可以通过多个路径发生,不同的细分独立组装. 这项研究揭示了这些平行折叠路径之间的明显结构和时间差异.
科学领域:
- 生物物理
- 结构生物学
- 蛋白质动力学
背景情况:
- 了解蛋白质折叠途径对于解读蛋白质功能和功能障碍至关重要.
- 蛋白质的复杂折叠格局在确定结构组装的顺序方面存在长期挑战.
- 之前的研究缺乏时间和结构分辨率来区分多个折叠路径.
研究的目的:
- 通过实验确定多个蛋白质折叠路径在结构组装顺序上有何差异.
- 解决折叠期间蛋白质结构的形成是否可以通过平行路径进行.
- 在结构和时间上描述单体的折叠景观.
主要方法:
- 使用多站点时间解析的Förster共振能量转移 (TR-FRET) 方法.
- 分析了各种蛋白质部分的种群演变的动力数据.
- 开发了一个现象学模型来描述细分特定结构的获取.
主要成果:
- 确定了最初的异质多链崩,随后是并行折叠路径.
- 通过对不同蛋白质片段的动力分析来区分并行路径.
- 观察到在初级序列中较近的段落比较远的段落更早获得结构.
结论:
- 蛋白质结构的形成可以在平行路径上独立进行.
- 一个模型描述了离散细分结构的时间和机制.
- 平均折叠进展包括α螺旋形成,核心巩固,β片形成和端到端紧缩.
相关概念视频
Protein Folding
124.6K
Overview
124.6K
Protein Folding
10.1K
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...
10.1K
Conservation of Protein Domains Over Different Proteins
13.7K
Protein domains are small structurally independent units that are part of a single amino acid chain. Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
13.7K
Protein and Protein Structure
84.7K
Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
A protein's shape is critical to its function. For example, an enzyme...
A protein's shape is critical to its function. For example, an enzyme...
84.7K
Protein Organization
152.8K
Overview
152.8K
Protein Organization
8.4K
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....
8.4K


