Turning On Fluorescence with Thiols - Synthetic and Computational Studies on Diaminoterephthalates and Monitoring the Switch of the Ca<sup>2+</sup>Sensor Recoverin
作者:Nina Wache、Alexander Scholten、Thorsten Klüner、Karl-Wilhelm Koch、Jens Christoffers
DOI:10.1002/ejoc.201200879
日期:2012.10
The fluorescence of maleimide-functionalized diaminoterephthalate derivatives (NiWa Orange) is “turned on” by the conjugate addition of thiols. Three new representatives of this class of dyes with emission at 560 nm were synthesized from succinyl succinates. The mechanism of turning on the fluorescence was investigated by computational studies. Radiationless transition to an energetically low-lying
马来酰亚胺官能化的二氨基对苯二甲酸酯衍生物(NiWa Orange)的荧光通过硫醇的共轭加成“开启”。此类染料的三个新代表在 560 nm 处发射,由琥珀酸琥珀酸酯合成。通过计算研究研究了开启荧光的机制。通过非绝热相互作用向能量低激发态的无辐射跃迁是导致探针与其分子靶标反应之前不存在荧光的机制。这一概念已通过标记含半胱氨酸的肽和蛋白质得到证实。例如,神经元钙传感器蛋白恢复蛋白第 39 位的单个半胱氨酸残基与 NiWa Orange 结合并打开其荧光。