相关实验视频
Updated: Jul 5, 2026

08:03
Study of Protein Dynamics via Neutron Spin Echo Spectroscopy
Published on: April 13, 2022
对蛋白质中跨键的j-合的动态效应
Phineus R L Markwick1, Remco Sprangers, Michael Sattler
1European Molecular Biology Laboratory, Meyerhofstrasse 1, 69117 Heidelberg, Germany. markwick@embl.de
Journal of the American Chemical Society
|January 16, 2003
概括
准确预测标量合需要考虑蛋白质运动. 分子动力学和DFT/FPT模拟显示,在不同的SMN Tudor域区域中,J合平均值不同.
科学领域:
- 计算化学是一种计算化学.
- 生物物理学的生物物理.
- 结构生物学是结构生物学.
背景情况:
- 核磁共振 (NMR) 光谱学依赖于标尺合来获得结构和动态信息.
- 准确预测标量合对于解释NMR数据和理解蛋白质动态至关重要.
- SMN Tudor 域涉及各种细胞过程,使其动态具有显著的兴趣.
研究的目的:
- 为了计算费米接触对3hJNC'在SMN Tudor域中的标量合的贡献.
- 为了研究蛋白质构造运动对标量合预测的影响.
- 在SMN Tudor域中,将J合动态与区域灵活性相关联.
主要方法:
- 结合分子动力学 (MD) 模拟与密度函数理论 (DFT) 和有限扰动理论 (FPT).
- 分析了500ps的MD轨迹以捕捉蛋白质构造变化.
- 计算累计J合平均值,以评估趋同和可变性.
主要成果:
- 形态运动极大地影响了对标量合的准确预测.
- 在稳定的β-sheet键中,J-合平均值在200 psi范围内趋同.
- 在β片边缘的灵活区域在整个500ps轨迹中表现出不同的J合平均值.
结论:
- 必须将蛋白质动态纳入精确的标量合计算.
- 这项研究提供了对SMN Tudor域内各个区域的差异性构造动态的见解.
- 这种方法提供了一种方法,可以使用J合分析对蛋白质灵活性进行定性评估.
相关概念视频
Cooperative Allosteric Transitions
Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
Protein Diffusion in the Membrane
Proteins show rotational as well as lateral diffusion across the membrane. The lateral diffusion of proteins was confirmed through the cell fusion experiment where mouse and human cells were fused, resulting in hybrid cells. When the human and mouse cells fused, the specific membrane proteins on human and mouse cells were marked with the red and green-fluorescent markers, respectively. Initially, the red and green fluorescence was located on the respective hemisphere of the cell. As time...
Cooperative Allosteric Transitions
Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
Cooperative Allosteric Transitions
Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
Structural Protein Function
Structural proteins are a category of proteins responsible for functions ranging from cell shape and movement to providing support to major structures such as bones, cartilage, hair, and muscles. This group includes proteins such as collagen, actin, myosin, and keratin.
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to form...
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to form...
Protein Dynamics in Living Cells
Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...

