对交叉链接器骨干结构对蛋白质动态分析影响的全面调查:Pin1的案例研究
Zichun Qiao1, Min Sun2, Zhou Gong3
1State Key Laboratory of Medical Proteomics, CAS Key Laboratory of Separation Science for Analytical Chemistry, National Chromatographic R. & A. Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, 116023, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
Talanta
|December 30, 2024
概括
交叉连接器的骨干结构显著影响蛋白质动态形状分析. 乙烯基甘醇 (BS(PEG) 2) 提供了对NIMA相互作用的Peptidyl-prolyl cis-trans异构酶1 (Pin1) 动态的卓越洞察力.
科学领域:
- 生物化学 生化学
- 结构生物学 结构生物学
- 化学生物学 化学生物学
背景情况:
- 蛋白质结构功能关系至关重要.
- 交联质谱法 (XL-MS) 分析了蛋白质复杂结构.
- 交叉链接器脊柱对蛋白质动态的影响还不太清楚.
研究的目的:
- 研究交叉链接器骨干结构如何影响动态蛋白质构造的分析.
- 评估不同交叉链接剂对Peptidyl-prolyl cis-trans异构酶NIMA-相互作用的1 (Pin1) 结构和动态的影响.
主要方法:
- 使用了三种交叉链接剂:迪苏胺基酸盐 (DST),比斯胺基二乙烯糖醇 (BSPEG) 2和迪苏胺基二氧化二二二酸盐 (DSDHD).
- 采用全原子分子动力学 (MD) 模拟和溶液核磁共振 (NMR).
- 描述了交叉链接器动力学及其对蛋白质结构的影响.
主要成果:
- 与DST相比,BS(PEG) 2为Pin1提供了更多的域间动态形状信息.
- BS(PEG) 2在紧状态和扩展状态之间表现出快速的过渡.
- 与BS(PEG) 2和DST.取得了可比的域内结构细节.
结论:
- 交叉链接器骨干结构对于使用XL-MS分析蛋白质动态至关重要.
- BS(PEG) 2有效地解决了像Pin1.1这样的蛋白质的域间动态.
- 交叉连接器的选择会影响获得的结构和动态信息的深度.
相关概念视频
Protein Dynamics in Living Cells
2.1K
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...
2.1K
Cytoskeletal Accessory Proteins
3.0K
The cytoskeleton is an essential cell component that plays several structural and functional roles. However, the filaments that make up the cytoskeleton cannot function independently and depend on the accessory or ancillary proteins to effectively carry out their function. Accessory proteins associate with cytoskeletal filaments and their monomers, aiding filament formation and function. They also help in the cross-communication among cytoskeletal filaments. Cytoskeletal accessory proteins are...
3.0K
Protein Folding
117.3K
Overview
117.3K
Cytoskeletal Linker Proteins - Plakins
2.3K
Plakins are large proteins with binding domains for microtubules, microfilaments, intermediate filaments, and membrane-associated protein complexes at cell junctions. Plakin functions are evolutionarily conserved and are primarily involved in organizing the different components of the cytoskeleton by crosslinking them to each other and connecting them to the cell-matrix and cell adhesion complexes. They are also known to interact with signal transducers, serve as scaffolds for signaling...
2.3K
Disassembly of Intermediate Filaments
2.0K
Intermediate filaments (IFs) do not undergo spontaneous disassembly. Enzymes, kinases, and phosphatases add and remove phosphates from specific sites to regulate their disassembly. The IF concentration in the cytoplasm also regulates the disassembly. If the concentration crosses a threshold, it activates the protein kinases in the vicinity, allowing the phosphorylation of IFs.
Keratin proteins, found at the cell periphery near cell junctions, undergo a cycle of assembly and disassembly. In Type...
Keratin proteins, found at the cell periphery near cell junctions, undergo a cycle of assembly and disassembly. In Type...
2.0K
Generation of Straight or Branched Actin Filaments
2.9K
The straight or branched structure formation of actin filaments is controlled by nucleating proteins such as the formins and Arp2/3 complex. Formin-mediated assembly results in straight filaments, whereas Arp2/3 protein complex-mediated assembly results in branched actin filaments.
Arp2/3 Complex
Arp2/3 complex is a seven-subunit complex consisting of two proteins similar to actin- Arp2 and Arp3, and five other subunits that help keep Arp2 and Arp3 inactive. When required, the complex is...
Arp2/3 Complex
Arp2/3 complex is a seven-subunit complex consisting of two proteins similar to actin- Arp2 and Arp3, and five other subunits that help keep Arp2 and Arp3 inactive. When required, the complex is...
2.9K


