一个in vivo屏幕识别了各种各样的域,这些域可以作为依赖强力的蛋白质溶解开关,用于Notch激活
Frederick C Baker1, Jacob Harman1, Trevor Jordan1
1Department of Biological Sciences, Augusta University, Augusta, GA 30912, USA.
Science signaling
|June 10, 2025
概括
研究人员确定了各种蛋白质域,可以充当感应力开关,取代Notch受体的负调节区域 (NRR). 这一发现突出了细胞信号传递的更广泛机制,其中包括依赖力量的蛋白解.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 发展生物学 发展生物学
背景情况:
- 划分蛋白质是通过连续分裂激活的跨膜受体,释放活跃的转录因子.
- 德尔塔/酸盐/LAG-2 (DSL) 连接物通过机械力激活Notch,涉及Epsin介导的内细胞分裂和ADAM10蛋白质分裂的负调节区域 (NRR).
研究的目的:
- 选替代蛋白质域,可以作为依赖连接体的蛋白质分解开关,取代Notch NRR.
- 调查机械力和Epsin介导的内细胞分裂在激活替代信号域中的作用.
主要方法:
- 在Drosophila melanogaster*中构建仿真Notch和DSL蛋白质.
- 选各种蛋白质域以检测它们在体内替代NRR的能力.
- 对ADAM10同源Kuzbanian (Kuz) 和以Epsin为媒介的内细胞分裂的分离依赖性的分析.
主要成果:
- 不同的蛋白质域,不同的序列和结构,成功地替代了NRR.
- 所有的功能替代域都需要由Kuzbanian (Kuz) 进行切割,这是*Drosophila* ADAM10同类.
- 以埃普辛为媒介的连接体内细胞结核是刺激这些替代域的裂变至关重要的.
结论:
- 广泛的蛋白质域可以作为感应力的蛋白质分解开关.
- 强度依赖的ADAM10介导蛋白解可能是细胞接触依赖的信号传递中广泛存在的机制.
- 这项研究扩大了对Notch通路激活和机械传导的理解.
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