MEK-ERK绑定接口的不对称共进化
Anton V Persikov1, Robert A Marmion2, Stanislav Y Shvartsman3
1Center for Computational Biology, Flatiron Institute, Simons Foundation, New York, New York, USA; Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, New Jersey, USA.
The Journal of biological chemistry
|September 13, 2025
概括
该研究揭示了MEK蛋白的适应性对接位 (D位) 如何与ERK共同演变,平衡保护功能与信号灵活性. 这种可适应的图案对于MEK-ERK复杂的稳定性和信号动态至关重要.
科学领域:
- 分子生物学分子生物学
- 进化生物学 进化生物学
- 生物化学 生物化学
背景情况:
- 细胞外信号调节激酶 (ERK) 是一种高度保守的蛋白质,通过酸化调节细胞过程.
- 中原激活蛋白激酶激酶 (MEK) 化ERK,但其相互作用网络不那么复杂.
- 蛋白质-蛋白质相互作用网络中的不对称性可能会影响共同进化.
研究的目的:
- 为了研究MEK-ERK复合物的共同进化.
- 了解MEK内在无序的N端对接图案 (D位) 在MEK-ERK相互作用中的作用.
- 探索进化压力如何塑造蛋白质-蛋白质相互作用网络.
主要方法:
- 基因组序列分析跨甲动物物种.
- 使用AlphaFold2.2.进行结构预测.
- 分子动力学模拟.分子动力学模拟.
- 在Drosophila melanogaster中进行功能性测试.
主要成果:
- MEK的D位点显示了加速的分歧,而ERK保持了保守.
- 五个保存的D-站点残留物与ERK的D-招募站点形成稳定的联系.
- D位点相互作用对于下游信号传输至关重要,并表现出性作用.
- D位点在群体内是保留的,但在它们之间有分歧,表明进化适应.
结论:
- MEK使用一种简单,可适应的D位点图案来调节MEK-ERK复杂的稳定性和结合动态.
- 在MEK-ERK相互作用中,进化压力推动了功能性保护和信号适应性之间的平衡.
- 这项研究表明了研究蛋白质-蛋白质相互作用网络演变的综合方法.
相关概念视频
Protein-protein Interfaces
14.4K
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...
14.4K
Protein-Protein Interfaces
4.4K
4.4K
Cooperative Allosteric Transitions
8.6K
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...
8.6K
Cooperative Allosteric Transitions
2.6K
2.6K
Cooperative Allosteric Transitions
3.0K
3.0K
Conserved Binding Sites
5.0K
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...
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...
5.0K


