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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 Grillet¹

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

Research square

|February 12, 2024

概括

一种新的方法,SUB-immunogold-SEM,精确地定位细胞膜附近的细胞内蛋白质. 这种扫描电子显微镜技术能够在各种细胞类型中高功率量化蛋白质.

科学领域:

细胞生物学细胞生物学
显微镜的使用方法
分子生物学分子生物学

背景情况:

传统的电子显微镜用于蛋白质定位的方法通常是繁的,并且仅限于外部表位.
精确的细胞内蛋白质在膜附近的定位对于理解细胞功能至关重要.

研究的目的:

介绍SUB-immunogold-SEM,一种新的扫描电子显微镜技术.
能够检测细胞膜附近的细胞内蛋白质表位.
提高蛋白质定位的灵敏度和量化能力.

主要方法:

开发了SUB-immunogold-SEM,一种扫描电子显微镜方法.
优化了四个关键样本准备因素,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:

实现了细胞内蛋白质的精确纳米级定位.
能够对细胞骨和跨膜蛋白进行高功率的量化.
在听觉毛细胞立体细胞中映射了肌酸氨酸环,在呼吸器毛中映射了ACE2分布.

结论:

SUB-immunogold-SEM为在任何细胞的暴露表面纳米级蛋白质定位提供了一种新的解决方案.
该技术克服了现有方法的局限性,允许详细分析亚细胞蛋白质分布.

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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.