绿色光蛋白单个分子的打开/关闭闪和切换行为
R M Dickson1, A B Cubitt, R Y Tsien
1Department of Chemistry and Biochemistry, University of California San Diego, La Jolla 92093-0340, USA.
Nature
|July 24, 1997
概括
单个绿色光蛋白 (GFP) 分子表现出可逆的闪和在光和黑暗状态之间切换. 这种在单个分子水平上可观察到的行为,表明在分子开关和光学数据存储中的应用.
科学领域:
- 生物物理学的生物物理.
- 摄影化学的使用.
- 材料科学 材料科学 材料科学
背景情况:
- 单分子光学研究为当地环境动态提供了洞察力.
- 绿色光蛋白 (GFP) 是一个关键的光生物标签,在体内形成的变体.
- 了解GFP光物理对于先进的成像和分子设备至关重要.
研究的目的:
- 为了研究绿色光蛋白 (GFP) 突变的单分子光物理行为.
- 在聚合物凝矩阵中探索GFP的闪和光交换特性.
- 评估GFP在分子电子和数据存储应用中的潜力.
主要方法:
- 在空气化水性聚合物凝中固定GFP突变物.
- 使用488nm光激发单个GFP分子.
- 使用405nm辐射观察光发射,闪和恢复.
主要成果:
- 单个GFP分子在几秒钟的时间尺度上显示可逆光闪.
- 分子过渡到持续的黑暗状态,可以用405nm光恢复.
- 这种光交换行为是独一无二的单分子观测.
结论:
- 单分子GFP表现出可控制的开/关状态,适合分子光子开关.
- 潜在的应用包括依赖时间的细胞过程跟踪和单分子光学数据存储.
- 这些发现强调了GFP的实用性超出了生物标签,延伸到纳米光子学.
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