保存的接口介导多种蛋白质-蛋白质相互作用在一个 prokaryotic 代谢子
Sanchari Bhattacharyya1, Srivastav Ranganathan1, Sourav Chowdhury1
1Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford St, Cambridge, MA 02138.
bioRxiv : the preprint server for biology
|July 16, 2025
概括
研究人员在大肠杆菌的1碳代谢中绘制了1225种蛋白质-蛋白质相互作用,揭示了加速代谢途径的酶集群. 这项工作澄清了代谢子生物物理学和短暂酶复合物的结构.
科学领域:
- 生物化学 生物化学
- 结构生物学 结构生物学
- 系统生物学 系统生物学
背景情况:
- 代谢途径中的酶可以通过弱蛋白-蛋白相互作用 (PPI) 形成代谢子.
- 这些酶组合定位和保护不稳定的代谢物,但它们的短暂性质使结构分析具有挑战性.
- 了解代谢结构对于重新设计代谢途径至关重要.
研究的目的:
- 为大肠杆菌的一碳代谢途径创建一个全面的蛋白质-蛋白质相互作用 (PPI) 地图.
- 研究酶复合体形成的结构基础和功能影响.
- 阐明控制代谢子组织和动态的生物物理原理.
主要方法:
- 利用双分子光补充剂 (BiFC) 在体内捕获短暂的PPI.
- 使用扫描突变发生,AlphaFold预测和元动力学模拟进行结构分析.
- 进行扩散反应模拟,用现实的PPI网络模拟路径流量.
主要成果:
- 在大肠杆菌的一碳代谢途径中生成了1225个PPI的地图.
- 确定了显著的途径内和途径间的聚类,特别是在叶酸和纯氨酸生物合成中.
- 揭示了蛋白质通常使用保存的,活跃的位点远程接口进行多重相互作用.
- 由于共享的相互作用表面和PPI网络,体现了代谢途径流量的大幅增加.
结论:
- 代谢醇的形成是由保存的,专用的蛋白质接口控制的.
- 过渡性酶复合物显著提高了代谢效率.
- 这项研究提供了对代谢子生物物理学和短暂酶相互作用的结构基础的基本见解.
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