对表达和内源性蛋白质的纳米级时空集群分析
Rachel S Gormal1, Tristan P Wallis1, Alex J McCann1
1Clem Jones Centre for Ageing Dementia Research, Queensland Brain Institute, The University of Queensland, St Lucia, Queensland, Australia.
Nature protocols
|August 9, 2025
概括
超分辨率显微镜使得能够对活细胞蛋白质动态进行纳米规模的研究. 本协议详细介绍了单分子成像和分析,用于跟踪蛋白质纳米聚类和构造状态.
科学领域:
- 细胞和分子生物学 细胞和分子生物学
- 生物物理学的生物物理.
- 显微镜和成像技术技术.
背景情况:
- 超分辨率显微镜为生物研究提供纳米分辨率.
- 单粒子追踪 (SPT) 允许研究活细胞中的蛋白质动力学.
- 现有的SPT方法在分析内源性蛋白质纳米集群方面存在局限性.
研究的目的:
- 详细说明表达和内源蛋白质单分子成像的方法.
- 引入一条精简的分析管道,从SPT数据中提取生物信息.
- 为了表征蛋白质在亚细胞区内的构造特异的纳米聚类行为.
主要方法:
- 使用光体内定位显微镜与单域纳米体.
- 对表达蛋白和纳米体与内源蛋白进行单分子成像.
- 应用一条精简的分析管道,使用新的集群算法 (使用时空索引进行纳米集群分析).
主要成果:
- 在纳米级分辨率下,表达和内源蛋白的精确定位.
- 动态纳米集群行为的特征,包括空间和时间信息.
- 细胞内内源性蛋白质的结构状态之间的差异化.
结论:
- 该协议为高级蛋白质动态分析提供了全面的指南.
- 能够详细研究活细胞中的蛋白质纳米集群和构造状态.
- 适合研究人员先前超分辨率显微镜的经验,需要 2-4 天.
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