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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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Protein Diffusion in the Membrane01:24

Protein Diffusion in the Membrane

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Proteins show rotational as well as lateral diffusion across the membrane. The lateral diffusion of proteins was confirmed through the cell fusion experiment where mouse and human cells were fused, resulting in hybrid cells. When the human and mouse cells fused, the specific membrane proteins on human and mouse cells were marked with the red and green-fluorescent markers, respectively. Initially, the red and green fluorescence was located on the respective hemisphere of the cell. As time...
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Fluid Mosaic Model01:19

Fluid Mosaic Model

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Scientists identified the plasma membrane in the 1890s and its principal chemical components (lipids and proteins) by 1915. The model for plasma membrane structure, proposed in 1935 by Hugh Davson and James Danielli, was the first model to be widely accepted in the scientific community. The model was based on the plasma membrane's "railroad track" appearance in early electron micrographs. Davson and Danielli theorized that the plasma membrane's structure resembled a sandwich...
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相关实验视频

Updated: Jul 1, 2025

Author Spotlight: Photo Switchable Protein Recruitment for Reversible Patterning in Artificial Cellular Systems
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模型膜上的动态光诱导蛋白质模式

Daniele Di Iorio1, Seraphine V Wegner2

  • 1Institute of Physiological Chemistry and Pathobiochemistry, University of Münster.

Journal of visualized experiments : JoVE
|March 11, 2024
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种光控制的方法,精确地将蛋白质定位在细胞膜上. 这种技术使用可光切换蛋白 (iLID) 和蓝光来在合成细胞中动态招募蛋白质.

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Single-Molecule Imaging of Lateral Mobility and Ion Channel Activity in Lipid Bilayers using Total Internal Reflection Fluorescence TIRF Microscopy
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科学领域:

  • 合成生物学 合成生物学
  • 生物化学 生物化学
  • 细胞生物学 细胞生物学

背景情况:

  • 精确的蛋白质定位和激活在细胞膜上对于细胞过程如极化,迁移和分裂至关重要.
  • 在合成细胞中控制这些过程需要具有高空间和时间分辨率的蛋白质招募方法.

研究的目的:

  • 开发一种方法,以高的时空精度在脂质膜上制造光调节,可逆的蛋白质图案.
  • 为了使合成细胞生物学中的应用能够对蛋白质定位进行动态控制.

主要方法:

  • 在支持的脂质双层 (SLBs) 和巨型单囊泡 (GUVs) 上固定光交换蛋白iLID (改进的可诱导光二次体).
  • 使用蓝光照明触发iLID与其伴侣Nano (野生类型SspB) 的结合.
  • 招募感兴趣的蛋白质 (POI) 融合到纳米从溶液到照亮的膜区域.

主要成果:

  • 在SLB和GUV上都证明了iLID的成功固定.
  • 实现光诱导,空间精确的纳米融合蛋白质的招募到照亮的膜区域.
  • 证实了在黑暗中蛋白质结合的可逆性,允许动态释放.

结论:

  • 开发的方法提供了一种灵活和多用途的方法,用于精确控制使用蓝光在空间和时间中的蛋白质定位.
  • 这种技术对于工程合成细胞和研究膜相关的细胞过程是有价值的.