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Ubiquitin Chain Analysis by Parallel Reaction Monitoring
Published on: June 17, 2020
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聚尤比奎链编辑由聚尤比奎链接特定抗体揭示
Kim Newton1, Marissa L Matsumoto, Ingrid E Wertz
1Department of Physiological Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, USA.
Cell
|August 30, 2008
概括
研究人员开发了特定的抗体来研究多比奎链,揭示了"多比奎编辑"过程,通过向蛋白质降解来调节先天免疫信号.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
背景情况:
- 聚比基因因的翻译后修饰对于细胞平衡和信号传递至关重要.
- 聚比基链中的氨酸连接的类型决定了蛋白质的命运.
- 了解这些联系是解读复杂细胞过程的关键.
研究的目的:
- 开发和利用聚比基链的链接特异性抗体.
- 调查聚比基编辑在先天免疫信号通路中的作用.
- 阐明抗多比基因抗体特异性的分子基础.
主要方法:
- 开发针对K63结合和K48结合的多比奎链的特异性抗体.
- 对抗K63结合Fab与K63结合diubiquitin的联合结晶,以确定特异性的结构基础.
- 应用抗体来研究受刺激细胞中RIP1和IRAK1的多比基因修饰.
主要成果:
- 成功开发了K63和K48多比奎丁链的结合特异性抗体.
- 一个共晶结构揭示了抗K63链接抗体特异性的分子基础.
- 表明RIP1和IRAK1经过了多基因编辑,最初获得了K63链接的链接,随后又获得了K48链接的链接.
- 与K48结合的多比奎丁针对这些蛋白质进行蛋白质体降解.
结论:
- 涉及从K63到K48链路的切换的多比基因编辑是减弱先天免疫信号的机制.
- 这种编辑过程调节了关键信号分子如RIP1和IRAK1.1的稳定性.
- 开发出来的抗体为研究细胞信号传递中的聚比基动力学提供了宝贵的工具.
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