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Updated: Jun 13, 2025

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SUB-immunogold-SEM揭示了子膜表位的纳米分布

Katharine K Miller¹, Pei Wang¹, Nicolas Grillet²

¹Department of Otolaryngology-Head & Neck Surgery, School of Medicine, 240 Pasteur Drive, Stanford University, Stanford, CA, 94305, USA.

Nature communications

|September 10, 2024

概括

我们开发了SUB-immunogold-SEM,这是一种新的扫描电子显微镜方法,用于在细胞膜附近精确地定位细胞内蛋白质. 这种技术增强了细胞中的蛋白质映射,包括听觉毛细胞和呼吸系统多细胞.

科学领域:

细胞生物学细胞生物学
显微镜技术的使用方法
生物物理学的生物物理.

背景情况:

带有免疫黄金标签的电子显微镜对于蛋白质定位至关重要.
现有的方法往往是繁的,限制量化,或者只检测外部蛋白质表位.

研究的目的:

介绍SUB-immunogold-SEM,这是一种扫描电子显微镜 (SEM) 技术,用于细胞内蛋白质表位检测.
提高灵敏度并扩大SEM用于纳米级蛋白质定位的应用.

主要方法:

开发了SUB-immunogold-SEM,一种基于SEM的新方法.
确定并优化了四个关键的样本准备因素,以提高灵敏度.
验证了对听觉毛细胞和呼吸系统多细胞的技术.

主要成果:

精确定位的细胞内蛋白质表位在膜附近.
实现了对细胞骨和细胞膜蛋白分布的高功率量化.
在听觉毛细胞中映射了MYO15A-L环和在呼吸道毛中ACE2分布.

结论:

SUB-immunogold-SEM为细胞内表位素提供精确的纳米级蛋白质定位.
该方法显著提升了不同细胞类型的蛋白质映射能力.
扩展SEM应用,用于研究暴露细胞表面上的蛋白质分布.

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相关概念视频

Immunogold Electron Microscopy

Immunogold Electron Microscopy

Immunoelectron microscopy utilizes immunogold labeling of endogenous proteins with specific antibodies to detect and localize these proteins in cells and tissues. The procedure provides insights into the distribution and quantification of protein under different stimulation conditions offering clues about their functions. Conjugating highly electron-dense gold particles with primary or secondary antibodies allow antigen detection on and within cells, with high resolution and specificity.