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Updated: Jan 17, 2026

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In Vitro Analysis of E3 Ubiquitin Ligase Function
Published on: May 14, 2021
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在碰撞的核糖体上编辑Polyubiquitin架构,保持持续的RQC活动
Shota Tomomatsu1,2, Yoshitaka Matsuo3, Fumiaki Ohtake4
1Division of RNA and Gene Regulation, Institute of Medical Science, The University of Tokyo, Minato-Ku, 108-8639, Japan.
The EMBO journal
|September 16, 2025
概括
两个双化酶 (DUBs),Ubp2和Ubp3,在酵母Sus10上编辑化链,促进与核糖体相关的质量控制 (RQC) 并确保持续的RQC活动.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 核糖体关联质量控制 (RQC) 管理停滞的核糖体.
- 对于RQC触发器 (RQT) 复合体的招募来说,与K63结合的 ribozyme 蛋白 uS10 的多比基因化是至关重要的.
- 在碰撞的核糖体上,聚比基因维护和循环的机制尚未完全理解.
研究的目的:
- 阐明在RQC期间在ubiquitin链编辑和回收过程中duebiquitinating酶 (DUB) 的作用.
- 调查 Ubp2 和 Ubp3 如何影响 uS10.10 上的多比基因架构.
- 了解特定的乌比奎链接对RQT介导的核糖体解离的影响.
主要方法:
- 酵母遗传学和生物化学 酵母遗传学和生物化学
- 在SUS10上对聚比奎丁链组成的分析.
- 在体外和体内的DUB活动的调查.
主要成果:
- Ubp2从S10中去除K63连接的聚比奎丁链,以免费的40S子单元进行回收.
- 在翻译核糖体上,ubp3从s10中切割K48结合和混合结合的多基因链.
- 在Sus10上的K48结合的乌比奎丁链抑制RQT介导的核糖体解离.
结论:
- Ubp2 和 Ubp3 是关键的 DUB,它们在 uS10.10 上编辑和回收聚比基因链.
- 这些DUB活动对于维持持续的RQC功能至关重要.
- 在Sus10上存在的泛素代码调节RQC的进展和核糖体质量控制.
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