相关实验视频

Updated: Jul 4, 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

基于Cu(II) 的蛋白质旋转标签的建模使用旋转器库

Zikri Hasanbasri¹, Maxx H Tessmer², Stefan Stoll²

¹Department of Chemistry, University of Pittsburgh, PA, 15260, USA. sksaxena@pitt.edu.

Physical chemistry chemical physics : PCCP

|February 7, 2024

概括

新的建模方法和用于用基酸盐 (dHis-Cu(II) -NTA) 旋转标签覆盖的双基铜-(II) 的旋转器库,使用电子偏磁共振 (EPR) 改进了蛋白质结构分析. 这提高了从EPR数据中获得的蛋白质模型的准确性和分辨率.

科学领域:

生物物理学的生物物理.
结构生物学结构生物学
计算化学计算化学

背景情况:

电子偏磁共振 (EPR) 使用像dHis-Cu(II) -NTA这样的双功能旋转标签提供高分辨率的蛋白质结构数据.
由于缺乏对dHis-Cu(II) -NTA的准确建模方法,对EPR数据的定量分析受到阻碍.

研究的目的:

开发新的dHis-Cu(II) -NTA旋转体库和建模方法,以改进蛋白质结构的确定.
以提高使用EPR数据生成的蛋白质模型的准确性和分辨率.

主要方法:

开发两个dHis-Cu(II) -NTA旋转器库.
使用分子动力学模拟和元动力学进行构造性采样.
应用 chiLife 双功能旋转标签建模方法.
对实验确定距离分布进行验证.

主要成果:

在建模中实现了高精度,预测和实验模式之间的绝对偏差在0.0-1.2 Å (平均0.6 Å) 之间.
验证了chiLife建模方法对dHis-Cu(II) -NTA的普遍性和有效性.
与其他旋转标签相比,证明了结构性解决方案的改进.

结论:

开发的dHis-Cu(II) -NTA旋转体库和chiLife方法显著提高了基于EPR的蛋白质建模的准确性.
这一进步有望通过EPR实验获得更精确,更高分辨率的蛋白质结构模型.

更多相关视频

Site Directed Spin Labeling and EPR Spectroscopic Studies of Pentameric Ligand-Gated Ion Channels

Site Directed Spin Labeling and EPR Spectroscopic Studies of Pentameric Ligand-Gated Ion Channels

Published on: July 4, 2016

Covalent Labeling with Diethylpyrocarbonate for Studying Protein Higher-Order Structure by Mass Spectrometry

Covalent Labeling with Diethylpyrocarbonate for Studying Protein Higher-Order Structure by Mass Spectrometry

Published on: June 15, 2021

相关概念视频

Ligand Binding Sites

Ligand Binding Sites

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...