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相关概念视频

Protein Dynamics in Living Cells01:19

Protein Dynamics in Living Cells

Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...

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FRET Microscopy for Real-time Monitoring of Signaling Events in Live Cells Using Unimolecular Biosensors
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Published on: August 20, 2012

改进的光稳定FRET-competent基于化光素的素四氨酸探针.

Carla C Spagnuolo1, Rudolf J Vermeij, Elizabeth A Jares-Erijman

  • 1Departamento de Química Organica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, CIHIDECAR, CONICET, Ciudad Universitaria-Pabellón II, 1428, Buenos Aires, Argentina.

Journal of the American Chemical Society
|September 14, 2006
PubMed
概括

与原来的FlAsH相比,新的替代的双四氨酸标签 (F2FlAsH和F4FlAsH) 提供了优越的光稳定性,pH不敏感性和增强的光谱特性,使新的FRET对成为可能.

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科学领域:

  • 生物化学 生物化学
  • 化学生物学 化学生物学
  • 光成像技术 光成像技术

背景情况:

  • 素酸头针粘合剂 (FlAsH) 是一种酸-四氨酸标签技术.
  • 对于FlAsH来说,光稳定性,pH灵敏度和光谱范围的改善是可取的.

研究的目的:

  • 开发新的替代的素四氨标签.
  • 描述这些新标签的特性及其在FRET应用中的性能.

主要方法:

  • 替代的FlAsH衍生物 (F2FlAsH,F4FlAsH) 的合成.
  • 光物理性质的表征,包括光稳定性,pH敏感性,吸收性和量子产量.
  • 评估福斯特共振能量转移 (FRET) 对的性能.

主要成果:

  • 与FAsH相比,F2FlAsH的光稳定性提高了50倍,pH敏感性降低,吸收率和量子产量提高了50倍.
  • F4FlAsH为二素染料调色板引入了一种新的光谱颜色.
  • F2FlAsH/F4FlAsH对形成了一个新的FRET对,其Förster距离 (R0) 为54 Å,超过了以前的二素染料FRET对.

结论:

  • 替代显著提高了双四氨酸标签的性能.
  • 这些改进的探针扩大了色染料在光成像和FRET研究中的实用性.
  • 新的FRET对为先进的生物研究提供了延长的Förster距离.