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相关概念视频

Protein Dynamics in Living Cells01:19

Protein Dynamics in Living Cells

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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.
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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相关实验视频

Updated: Jul 2, 2025

Immunofluorescence Analysis of Endogenous and Exogenous Centromere-kinetochore Proteins
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Immunofluorescence Analysis of Endogenous and Exogenous Centromere-kinetochore Proteins

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基于光补充的FRET成像揭示了中心分子组装动态.

Zhen Dou1, Ran Liu1, Ping Gui1,2,3

  • 1MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics, Center for Advanced Interdisciplinary Science and Biomedicine of IHM, Hefei National Center for Cross-disciplinary Sciences, University of Science and Technology of China, Hefei 230027, China.

Molecular biology of the cell
|February 21, 2024
PubMed
概括
此摘要是机器生成的。

我们开发了一种基于光补充的Förster共振能量转移 (FC-FRET) 方法,以可视化活细胞中的蛋白质组装动态. 这种技术揭示了CDK1激酶活性如何调节细胞分裂期间的蛋白质相互作用.

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Quantitative Immunofluorescence Assay to Measure the Variation in Protein Levels at Centrosomes
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Quantitative Immunofluorescence Assay to Measure the Variation in Protein Levels at Centrosomes

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相关实验视频

Last Updated: Jul 2, 2025

Immunofluorescence Analysis of Endogenous and Exogenous Centromere-kinetochore Proteins
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Immunofluorescence Analysis of Endogenous and Exogenous Centromere-kinetochore Proteins

Published on: March 3, 2016

15.2K
Visualizing Intracellular SNARE Trafficking by Fluorescence Lifetime Imaging Microscopy
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Quantitative Immunofluorescence Assay to Measure the Variation in Protein Levels at Centrosomes
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科学领域:

  • 细胞生物学 细胞生物学
  • 分子生物学分子生物学
  • 生物物理学的生物物理.

背景情况:

  • 了解细胞动力学需要对分子组合进行实时可视化.
  • 细胞核复合体 (CCAN) 对于细胞分裂至关重要.
  • 以前的方法缺乏在活细胞中观察动态蛋白相互作用的分辨率.

研究的目的:

  • 引入和验证一种新的光学成像方法,用于观察多重蛋白相互作用.
  • 为了研究参与细胞分裂的蛋白质复合体的时空动态.
  • 阐明CDK1激酶在细胞分裂期间蛋白质招募中的作用.

主要方法:

  • 开发了基于光补充的Förster共振能量转移 (FC-FRET) 用于活细胞成像.
  • 利用互补的光蛋白来可视化蛋白质二元化.
  • 应用FRET测量以量化纳米分辨率的蛋白质相互作用.
  • 观察了中间体CENP-SXTW四度体的组装动态以及涉及CENP-T和kinetochore蛋白质Spc24/25.5的相互作用.

主要成果:

  • 在活细胞中成功可视化了中间体CENP-SXTW四聚体组装动态.
  • 划分了CENP-TW和Spc24/25二元体之间的二次相互作用,以及单体CENP-T与Spc24/25二元体之间的相互作用.
  • 发现CDK1激酶活性对CENP-T最初招募Spc24/25至关重要.
  • 发现染色体分离期间的CENP-T和Spc24/25相互作用独立于CDK1活动.

结论:

  • FC-FRET是一种强大的技术,用于研究纳米尺度上的三元蛋白和四元蛋白的时空动力学.
  • 建立了一个平台,准确报告活细胞中的多重蛋白相互作用.
  • 揭示了一种涉及CDK1在细胞分裂期间蛋白质招募中的新型调节机制.