Substrate-Photocaged Enzymatic Fluorogenic Probe Enabling Sequential Activation for Light-Controllable Monitoring of Intracellular Tyrosinase Activity
作者:Sheng Yang、Jiaxing Jiang、Anxin Zhou、Yibo Zhou、Wenling Ye、Dong-Sheng Cao、Ronghua Yang
DOI:10.1021/acs.analchem.0c00746
日期:2020.5.19
present the first photocaged tyrosinase fluorogenic probe by caging the substrate of the enzymatic probe with a photolabile group. Because of the sequential light and enzyme-activation feature, this probe exhibits photocontrollable "turn on" response toward TYR with good selectivity and high sensitivity (detection limit: 0.08 U/mL). Fluorescence imaging results validate that the caged probe possesses the
酪氨酸酶(TYR)是一种涉及黑色素生成的关键酶,其过表达与黑色素瘤密切相关。为了精确地监测细胞内TYR活性,分子成像工具的远程控制非常有意义,但仍有待探索。在这项工作中,我们通过将酶促探针的底物与光不稳定基团结合在一起,提出了第一个光笼化酪氨酸酶荧光探针。由于具有连续的光和酶激活功能,该探针显示出对TYR的光控“打开”响应,具有良好的选择性和高灵敏度(检测限:0.08 U / mL)。荧光成像结果验证了笼状探针具有以光控方式可视化细胞内内源酪氨酸酶活性的能力,从而为研究TYR相关的生理功能和病理作用提供了一种很有前途的分子成像工具。此外,我们的顺序激活策略具有开发具有时空分辨率的更多光控酶促荧光探针的巨大潜力。