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在使用AlphaFold2的Wnt信号中探索DIX-DIX同型和异型寡合体
Zehua Wen1, Lei Wang1, Shi-Wei Liu1
1College of Chemical Engineering, Sichuan University of Science and Engineering, Zigong 64300, China.
Cells
|October 15, 2024
概括
Wnt信号依赖于DIX域互动. AlphaFold2和PRODIGY预测了结合亲和性,揭示了Axin2和Dvl1同分体更强,异分体通常表现出更高的亲和力,澄清了Wnt通路机制.
科学领域:
- 分子生物学分子生物学
- 结构生物学 结构生物学
- 生物化学 生化学
背景情况:
- 对于胚胎发育和癌症来说,Wnt信号非常重要.
- 在Axin,Dishevelled (Dvl) 和Coiled-coil-DIX1蛋白质内的DIX域相互作用对于Wnt/β-catenin通路激活至关重要.
- 由于技术挑战,DIX域互动的具体情况仍然不清楚.
研究的目的:
- 预测和分析DIX域同位体和异位体的结构和结合亲缘关系.
- 阐明Wnt信号通路中DIX介导相互作用的特异性.
- 评估AlphaFold2和PRODIGY在研究蛋白质与蛋白质相互作用中的实用性.
主要方法:
- 在没有模板的情况下,使用AlphaFold2 (AF2) 预测6个同极体和22个异极体的结构.
- 预测结构与现有的X射线复杂结构的比较.
- 使用PRODIGY.计算DIX复合物的结合亲和度.
主要成果:
- 亚克辛2 DIX 类同流体表现出比亚克辛1 DIX 类同流体更强的结合亲和力.
- 与Dvl2和Dvl3.3相比,Dvl1 DIX同位素具有更高的结合亲和力.
- 卷轴-DIX1 (Ccd1) DIX同位体的结合比Axin1 DIX同位体的结合更弱.
- 一般来说,异构体相互作用比同构体具有更强的结合亲和力.
结论:
- 研究结果提供了关于Wnt信号通路激活的分子机制的见解.
- 突出了AlphaFold2和PRODIGY作为研究信号通路中的蛋白质-蛋白质相互作用的强大工具的潜力.
- 澄清了各种DIX域相互作用的差异性结合亲和力.
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