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光学调节的可光切换光蛋白提高了生物成像灵敏度

Yen-Cheng Chen¹, Amy E Jablonski¹, Irina Issaeva¹

¹School of Chemistry and Biochemistry and Petit Institute for Bioscience and Bioengineering, Georgia Institute of Technology , Atlanta, Georgia 30332-0400, United States.

Journal of the American Chemical Society

|September 25, 2015

概括

这项研究引入了双激光调制同步放大光图像恢复 (DM-SAFIRe) 以增强生物成像. 通过区分结合和不结合的可光切换光蛋白,DM-SAFIRe可以提高信号对比度,并可以检测弱蛋白相互作用.

科学领域:

分子和细胞生物学
生物物理
光学成像

背景情况:

可光切换光蛋白 (PS-FPs) 为生物成像提供了新的功能.
在当前的成像技术中,高背景噪声和分辨光谱相似的光体是很大的挑战.
区分绑定和不绑定蛋白质对于研究分子相互作用至关重要.

研究的目的:

开发和验证一种新的成像技术,即双激光调制同步放大光图像恢复 (DM-SAFIRe),用于增强生物成像.
证明DM-SAFIRe在高背景环境中提高信号对比度的能力.
通过区分蛋白质状态来显示DM-SAFIRe在检测弱蛋白相互作用方面的潜力.

主要方法:

使用了PS-FP发射的光学操纵.
采用双激光调制用于同步放大光图像恢复 (DM-SAFIRe).
应用了PS-FP的独特明亮到暗状态互换率,用于信号的区分和排斥.

主要成果:

通过明确的调节,DM-SAFIRe在高背景条件下显示出更好的信号对比度.
该技术显示了不同细胞位置的相对丰度的线性.
DM-SAFIRe成功地区分了光谱上无法区分的PS-FP,并拒绝了与RSFASTLIME结合形式相比的扩散.

结论:

通过拒绝不可调节的背景,DM-SAFIRe显著提高了信号对比度和灵敏度.
该方法可以选择性地恢复固定和扩散细胞内蛋白质的信号.
DM-SAFIRe在检测以前未结合的蛋白质所隐藏的弱蛋白与蛋白质相互作用方面表现有前途.

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