通过FAM222蛋白质的结构建模进行进化分析,揭示了脊椎动物的一种新型无序保存域,该域与NLK相互作用
Eduardo Calvario1, Lorenzo Segovia2, Mario Zurita3
1Departamento de Genética del Desarrollo y Fisiología Molecular 1, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Av Universidad 2001, Col. Chamilpa, Mexico City, 62250, Mexico.
Scientific reports
|December 9, 2025
概括
内在无序区域 (IDR) 对于细胞信号传递至关重要. 这项研究显示,DCD222,FAM222蛋白中保存的IDR,结合Nemo-like kinase (NLK),调节其活性而不阻断催化.
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:
- 内在无序区域 (IDR) 对于细胞信号通路中的动态和特定的蛋白质-蛋白质相互作用至关重要.
- 线素激活蛋白激酶 (MAPK) 网络在监管相互作用中大量利用IDR,但IDR的进化约束和它们在MAPK调节中的作用尚未完全理解.
研究的目的:
- 识别和描述参与尼莫样激酶 (NLK) 调节的进化保守的内在无序区域 (IDR).
- 阐明FAM222蛋白家族的IDR (DCD222) 和NLK之间的相互作用的结合机制和功能影响.
主要方法:
- 遗传学分析,以评估DCD222区域的进化保护.
- 预测AlphaFold3结构以建模DCD222-NLK复合体.
- 原子分子动力学模拟以评估蛋白质-蛋白质接口的稳定性.
主要成果:
- DCD222,在FAM222蛋白中高度保守的IDR,与尼莫样类激酶 (NLK) 相互作用.
- 遗传学分析证实了DCD222从循环体到人类的保存,这表明了强大的进化压力.
- 结构建模和模拟揭示了一种复杂的结合机制,涉及反向对接 (revD) 和β-sheet图案,具有稳定的相互作用接口,不封闭NLK催化部位.
结论:
- DCD222 IDR是一个进化约束的域,对NLK相互作用至关重要.
- FAM222A和FAM222B可能是NLK活动的调节器,而不是基板.
- 这项研究提供了关于内在无序域如何为脊椎动物的信号通路适应和调节作出贡献的新见解.
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