OptIC-Notch揭示了调节与CSL受体相互作用的机制
Jonathan M Townson1, Maria J Gomez-Lamarca1, Carmen Santa Cruz Mateos1
1Department of Physiology Development and Neuroscience, University of Cambridge, Downing Street, Cambridge CB2 3DY, UK.
诺奇信号的光遗传控制揭示了诺奇细胞内域 (NICD) 将细胞质中的CSL蛋白隔离,直到光释放出来. 这种光诱导的释放有助于CSL核导入和基因激活.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 痕信号传递对发育和疾病至关重要,涉及受体-连接体相互作用和痕细胞内域 (NICD) 的释放.
- NICD与CSL (CBF1/Su(H) /LAG-1) 和Mastermind形成了一个转录复合体,但复合体形成的地点尚不清楚,因为CSL缺乏核定位序列.
研究的目的:
- 通过一种新的光遗传学方法,研究Notch-CSL复合体形成和向基因激活的机制.
- 确定NICD释放和CSL结合在细胞质中的作用.
主要方法:
- 开发一种光遗传工具 (OptIC-Notch) 来通过光控制NICD释放.
- 监测CSL局部化和三方复合体的形成,以应对光诱导的NICD释放.
- 在控制的NICD释放后对目标基因表达的分析.
主要成果:
- 未切割的OptIC-Notch在细胞质中捕获CSL,依赖于一个柔膜ΦWΦP基因.
- 掩盖 ΦWΦP 图案可以防止 CSL 绑定.
- 从OptIC-Notch或经过修改的版本中,光诱导的NICD释放有效地促进CSL核导入和目标基因激活.
结论:
- 对ΦWΦP基因的暴露对CSL封存至关重要,可能在细胞质中.
- 对NICD释放的光遗传控制为研究Notch信号动态提供了一个强大的工具.
- 隙-CSL复合体的形成可以在进入核之前在细胞质中开始.
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