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Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
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Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
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相关实验视频

Updated: Jun 17, 2025

Author Spotlight: Unveiling the Dynamics of Mechanical and Biochemical Signals in Animal Morphogenesis Research
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超高分辨率的蛋白质成像使用双功能的照明Aptamers.

Franziska Grün1, Niklas van den Bergh1,2, Maja Klevanski3

  • 1Institute of Pharmacy and Molecular Biotechnology (IPMB), Heidelberg University, 69120, Heidelberg, Germany.

Angewandte Chemie (International ed. in English)
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PubMed
概括

研究人员使用单分子局部显微镜 (SMLM) 开发了用于蛋白质成像的双功能体. 这些体使蛋白质的超高分辨率成像具有高精度和光稳定性,优于传统的抗体方法.

关键词:
光灯照明的阿普塔美尔 (aptamer) 是一种光灯.在纳米级地形图像 (PAINT) 中成像的点积累.蛋白质成像技术 蛋白质成像技术结合蛋白质的阿巴胺.超高分辨率成像成像技术

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科学领域:

  • 分子和细胞生物学分子和细胞生物学
  • 生物物理学的生物物理.
  • 显微镜的使用方法

背景情况:

  • 单分子局部化显微镜 (SMLM) 需要有效的蛋白质标记方法,使用小标签和合适的光物理特性来可视化生物分子组织和相互作用.
  • 光照明光吸光体 (FLAP) 为SMLM提供了潜力,RhoBAST由于其亮度,光稳定性,性和快速交换动力学而显示出希望.

研究的目的:

  • 扩大RhoBAST的实用性,一个光照明的阿普坦,用于蛋白质成像,通过将其与蛋白质结合的阿普坦结合.
  • 通过SMLM技术,证明这些双功能体对高分辨率和超分辨率的蛋白质成像,包括GFP标记蛋白质的有效性.

主要方法:

  • 将RhoBAST与各种蛋白质结合性体融合,以创建用于蛋白质向的双功能体.
  • 应用RhoBAST-PAINT,一种SMLM技术,利用化染料SpyRho,用于哺乳动物细胞系和初级神经元的超高分辨率成像.
  • 与基于抗体的标准免疫光协议进行对比,对双功能阿巴特马的性能进行比较.

主要成果:

  • 使用各种蛋白质结合型体和FLAP用于蛋白质成像的双功能体的多功能性.
  • 通过将RhoBAST与GFP结合的阿普坦酶AP3融合,实现了GFP标记蛋白的高分辨率和超高分辨率成像.
  • 与抗体相比,双功能体表现出更高的性能,是7倍小,并表现出增强的漂白电阻.

结论:

  • 开发的双功能体有效地通过SMLM实现超分辨率蛋白质成像,扩大了RhoBAST的应用.
  • 这种方法为基于抗体的方法提供了强大的替代方案,为较小的探针提供了改善的细胞成像光稳定性.