DBD Dyes as Fluorescence Lifetime Probes to Study Conformational Changes in Proteins
作者:Robert Wawrzinek、Joanna Ziomkowska、Johanna Heuveling、Monique Mertens、Andreas Herrmann、Erwin Schneider、Pablo Wessig
DOI:10.1002/chem.201302368
日期:2013.12.16
this fluorescence quenching is prevented, indicating successful bonding. Being sensitive to their environmental polarity, these compounds have been used as powerful fluorescence lifetime probes for the investigation of conformational changes in the maltose ATP‐binding cassette transporter through fluorescence lifetime spectroscopy. The differing tendencies of the fluorescence lifetime change for both
以前,[1,3] dioxolo [4,5- f已经描述了基于] [1,3]苯并二恶唑(DBD)的荧光团,作为报告其微环境极性的高灵敏度荧光寿命探针。现在,已经开发了新一代的DBD染料。尽管它们仍然对极性敏感,但是与以前的DBD染料相比,它们即使在水性环境中也具有非凡的光谱特性。它们的特点是荧光寿命长(10–20 ns),大斯托克斯位移(≈100nm),高光稳定性和高量子产率(> 0.56)。在此,描述了用于标记生物靶标的光谱性质和功能化衍生物的合成。此外,两个DBD代的硫反应性马来酰亚胺衍生物均表现出强分子内荧光猝灭作用。已经对该机制进行了研究,发现该机制经历了光电子转移(PET)过程。与硫醇基反应后,可防止这种荧光猝灭,表明成功键合。这些化合物对环境极性敏感,已被用作功能强大的荧光寿命探针,用于通过荧光寿命光谱研究麦芽糖ATP结合盒转运蛋白的构象变化。对于两种DBD染料,荧光寿命变化的