CCR4-NOT复合体的NOT10:11模块的结构和组装
Yevgen Levdansky1, Tobias Raisch2, Justin C Deme3
1RNA Biology Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, MD, USA.
Communications biology
|July 17, 2023
概括
这就是CCR4-NOT复合体.
科学领域:
- 分子生物学分子生物学
- 结构生物学 结构生物学
- 欧核生物基因调节 欧核生物基因调节
背景情况:
- 在真核生物中,CCR4-NOT复合体对于转录后基因调节至关重要.
- 在这个复合体内,NOT1,NOT10和NOT11蛋白质形成了一个保存模块.
- 该模块对CCR4-NOT功能的确切贡献尚未完全理解.
研究的目的:
- 为了阐明 NOT1:NOT10:NOT11 模块的结构基础.
- 了解这个保存的模块的组装机制和稳定性.
- 为了研究 NOT1:NOT10:NOT11 模块的进化保存.
主要方法:
- 低温电子显微镜 (cryo-EM) 用于确定高分辨率结构.
- 生物化学解剖研究使用来自不同物种的ortologs.
- 蛋白质与蛋白质相互作用和复杂组合的分析.
主要成果:
- 获得了人类和的三元复合体的亚-3 Å 分辨率冷电磁结构. NOT1:NOT10:NOT11.
- 该模块呈现出一种进化保存和灵活的结构.
- 一个层次的组装路径被揭示出来:NOT11绑定NOT10,然后绑定NOT1.
- 在NOT11中富含proline的图案对于稳定模块至关重要.
结论:
- 这项研究为CCR4-NOT复合体的NOT1:NOT10:NOT11模块提供了前所未有的结构洞察力.
- 已经阐明了模块的层次和稳定组装机制.
- 这些发现有助于我们更好地理解CCR4-NOT复合体对转录后基因调节的理解.
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