相关实验视频

Updated: Jun 13, 2025

Paramagnetic Relaxation Enhancement for Detecting and Characterizing Self-Associations of Intrinsically Disordered Proteins

Paramagnetic Relaxation Enhancement for Detecting and Characterizing Self-Associations of Intrinsically Disordered Proteins

Published on: September 23, 2021

超越断电静电学在调节内在无序蛋白质的构造方面

Michael Phillips¹, Murugappan Muthukumar², Kingshuk Ghosh^1,3

¹Department of Physics and Astronomy, University of Denver, Denver, CO 80208, USA.

|September 10, 2024

概括

内在无序的蛋白质 (IDP) 呈现电荷调节,其中氨基酸电荷根据它们的环境而变化. 这项研究提出了一个新的理论,解释了二极相互作用,解释了IDP的形状和动态.

科学领域:

生物物理学的生物物理.
蛋白质科学蛋白质科学
计算生物学计算生物学

背景情况:

内在无序的蛋白质 (IDPs) 缺乏稳定的3D结构,使得它们的构造和动态对氨基酸序列高度敏感.
可电离氨基酸残留的电荷不是固定的,可以存在于电离 (单极) 或离子配对 (双极) 状态中.
这种被称为电荷调节的现象影响蛋白质的行为,但在很大程度上被忽视了,特别是双极相互作用.

研究的目的:

在IDP中开发一个包含双极相互作用的自相一致的电荷调节理论.
研究蛋白质序列,温度和离子强度如何影响电荷调节和蛋白质构成.
为了解和预测境内流离失所者的行为提供一个定量框架.

主要方法:

开发了电荷调节的理论框架,包括二极相互作用.
应用了一种自相一致的程序来建模可电离组的电荷状态.
验证了对Prothymosin-alpha的实验数据的理论,包括减电和依赖盐的形状.

主要成果:

该理论量化地复制了Prothymosin-alpha的实验性电荷减小和盐依赖性构造数据.
预测带电组在混合相反电荷的序列中与分离电荷相比,电荷较小的电离.
证明电荷调节与二极相互作用可以导致自发相位分离,具有不同的形状和电荷状态.

结论:

电荷调节,特别是双极相互作用,对于理解IDP的形状和动态至关重要.
蛋白质序列和电荷模式显著影响电荷调节.
这个框架提供了关于生物调节者如酸化和突变如何控制蛋白质功能的见解.

关键词:

国内发展计划 (IDP) 是一个.功能功能功能功能.不同聚合物的异质聚合物.

更多相关视频

Optimization of Synthetic Proteins: Identification of Interpositional Dependencies Indicating Structurally and/or Functionally Linked Residues

Optimization of Synthetic Proteins: Identification of Interpositional Dependencies Indicating Structurally and/or Functionally Linked Residues

Published on: July 14, 2015

Author Spotlight: Exploring Intrinsically Disordered Protein Dynamics Through NMR Relaxation Experiments

Author Spotlight: Exploring Intrinsically Disordered Protein Dynamics Through NMR Relaxation Experiments

Published on: November 1, 2024

相关概念视频

Intrinsically Disordered Proteins

Intrinsically Disordered Proteins

Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...

Protein Folding

Protein Folding

Molecular Chaperones and Protein Folding

Molecular Chaperones and Protein Folding

The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...

Conserved Binding Sites

Conserved Binding Sites

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...

Conservation of Protein Domains Over Different Proteins

Conservation of Protein Domains Over Different Proteins

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...

Protein-protein Interfaces

Protein-protein Interfaces

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...