Locations and Reorientations of Multi-Ring-Fused 2-Pyridones in Ganglioside G<sub>M1</sub> Micelles
作者:Radek Šachl、Erik Rosenbaum、Magnus Sellstedt、Fredrik Almqvist、Lennart B.-Å. Johansson
DOI:10.1021/la104051z
日期:2011.3.1
resemblance to other biologically active 2-pyridone systems, were solubilized in spherical micelles formed by the gangloiside GM1 and studied with respect to their spatial localization and rotational mobility. For this, electronic energy transfer between the multi-ring-fused 2-pyridone (donor) and BODIPY-FL-labeled GM1 was determined, as well as their fluorescence depolarization. From the obtained efficiency
荧光多环稠合的2-吡啶酮,用化学相似的其它生物活性的2-吡啶酮系统,在通过gangloiside G所形成球形胶束增溶M1和相对于研究它们的空间定位和旋转运动。为此,多环稠合的2-吡啶酮(供体)和BODIPY-FL标记的G的电子能量转移M1确定,以及他们的荧光去极化。从获得的能量转移到神经节苷脂的极性部分或非极性部分中的受体基团(BODIPY-FL)的能量转移效率,可以估计出多环稠合的2-吡啶酮。研究的多环稠合2-吡啶酮的质心位于距胶束质心约33Å的位置,这对应于内部疏水-亲水界面区域。在这个位置,多环稠合的2-吡啶酮的重取向速率出乎意料地缓慢,典型的相关时间为35-55 ns。没有发现形成基态和激发态二聚体的证据,即使两个单体通过一个短的共价接头被迫彼此靠近也是如此。