作者:Jessica L. Klockow、Kenneth S. Hettie、Kristen E. Secor、Dipti N. Barman、Timothy E. Glass
DOI:10.1002/chem.201501379
日期:2015.8.3
Tunable dual‐analyte fluorescent molecular logic gates (ExoSensors) were designed for the purpose of imaging select vesicular primary‐amine neurotransmitters that are released from secretory vesicles upon exocytosis. ExoSensors are based on the coumarin‐3‐aldehyde scaffold and rely on both neurotransmitter binding and the change in environmental pH associated with exocytosis to afford a unique turn‐on
可调双分析物荧光分子逻辑门(ExoSensors)设计用于成像选择的,在胞吐作用后从分泌小泡释放的小泡伯胺神经递质。ExoSensor基于香豆素3醛支架,并依赖于神经递质的结合以及与胞吐作用相关的环境pH的变化,以提供独特的开启荧光输出。pH功能直接整合到支架的荧光团π系统中,从而在释放标记的神经递质时增强荧光输出。通过改变具有各种给电子和吸电子磺酰胺取代基的pH敏感单元,我们确定了p K a之间的相关性。pH敏感基团的活性和活化荧光团的荧光输出。通过这样做,我们在模拟胞吐作用的条件下评估了ExoSensors,实现了十二倍的荧光增强。ExoSensor非常适合用作分子成像工具,仅允许直接观察在胞吐作用后从分泌囊泡释放的神经递质。