跨蛋白信号传导的时间解析跟踪:Synechocystis PixD-PixE复合体作为光强度传感器
Keisuke Tanaka1, Yusuke Nakasone, Koji Okajima
1Department of Chemistry, Graduate School of Science, Kyoto University, Japan.
Journal of the American Chemical Society
|May 9, 2012
概括
蓝光受体PixD及其与PixE的相互作用对光毒性至关重要. 这项研究表明,PixD复合体的分解需要两个PixD子单元的光激活,这表明依赖光强度的生物反应.
科学领域:
- 生物化学 生物化学
- 摄影生物学 摄影生物学
- 微生物生理学 微生物生理学
背景情况:
- 皮克斯D是一种蓝光受体,具有BLUF域,通过与PixE的相互作用对光毒性至关重要.
- 已知PixD的初始光化学反应,但随后的反应动态和复杂的分解仍然不清楚.
研究的目的:
- 为了研究PixD-PixE复合体的蛋白间反应动态.
- 阐明光线激活后PixD-PixE复合体分解的机制和动力学.
主要方法:
- 时间解析的短暂格子光谱学被用来研究蛋白间反应动态.
- 在时间域中分析光引起的扩散系数变化.
主要成果:
- 通过扩散系数的变化直接观察到PixD-PixE复合物的解离.
- 发现复杂的拆卸取决于复合体内的至少两个PixD子单元的光激活.
- 确定了解离过程的动力学.
结论:
- 皮克斯D的生物反应与光强度没有线性相关,而是依赖光强度.
- 这一发现为通过PixD调解的光的信号传导机制提供了新的见解.
更多相关视频
07:56Utilizing Time-Resolved Protein-Induced Fluorescence Enhancement to Identify Stable Local Conformations One α-Synuclein Monomer at a Time
Published on: May 30, 2021
07:55Luciferase Complementation Imaging Assay in Nicotiana benthamiana Leaves for Transiently Determining Protein-protein Interaction Dynamics
Published on: November 20, 2017
相关概念视频
01:19Protein 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...
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...
01:11Channel Rhodopsins
Most organisms use photoreceptors to sense and respond to light. Examples of photoreceptors include bacteriorhodopsins and bacteriophytochromes in some bacteria, phytochromes in plants, and rhodopsins in the photoreceptor cells of the vertebral retina. The light-sensitive property of these receptors is because of the bound chromophores, such as bilin in the phytochromes and retinal in the rhodopsins.
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...