Synthesis of a new bifunctionalised fluorescent label and physical properties of the bound form on model peptide of troponin C
作者:Tasuku Hirayama、Shohei Iyoshi、Masayasu Taki、Yuichiro Maeda、Yukio Yamamoto
DOI:10.1039/b705704k
日期:——
A new bifunctional fluorescent label, BRos, was synthesised in order to monitor protein dynamics using fluorescence microscopy, and the photophysical properties were compared with those of bifunctionalised rhodamine, BRho. In a labelling experiment with a model peptide of troponin C, which regulates muscle contraction and relaxation, it was found that BRos was bound to the peptide through two linkages and provided a homogeneous compound, whereas BRho gave a pair of diastereomers having different physical properties in NMR and HPLC analyses.
为了利用荧光显微镜监测蛋白质动态,研究人员合成了一种新的双功能荧光标签BRos,并将其光物理性质与双功能罗丹明BRho进行了比较。在用调节肌肉收缩和松弛的肌钙蛋白C模型肽进行的标记实验中,研究人员发现BRos通过两个连接与肽结合,形成了一种均相化合物,而BRho则形成了一对具有不同物理性质的非对映异构体,在核磁共振和高效液相色谱分析中得到了证实。