Fluorogenic and chromogenic detection of carboxypeptidase Y with a nonpeptide-based small-molecule probe
Fluorogenic and chromogenic detection of carboxypeptidase Y with a nonpeptide-based small-molecule probe
复制标题
使用非肽小分子探针对羧肽酶 Y 进行荧光和显色检测
DOI:
10.1016/j.snb.2018.04.102
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发表时间:
2018-09
期刊:
影响因子:
--
通讯作者:
Yang Guang Fu
中科院分区:
文献类型:
--
作者:
Xiong Hao;Yang Jia Qian;Kang Wei Ming;Wu Feng Xu;Zuo Jia Li;Zhou Zi Yu;Yang Wen Chao;Yang Guang Fu
Carboxypeptidase Y (CPY) is a vital enzyme with many well-known biological significances, such as determination of amino acid sequences and biosynthesis of polypeptides. Herein we developed a nonpeptide-based fluorescent probe to sense CPY activity accurately and successfully applied it to the inhibitory study. Based on the organic synthesis and comprehensive characterization, the refined probeCPY-P3displayed excellent specificity towards CPY and exhibited over 400-fold enhancement of fluorescence intensity upon the hydrolysis of CPY. Compared with the commonly used peptide-based fluorescent substrate (Suc-IIW-AMC),CPY-P3showed about 12-fold higher binding affinity and comparable catalytical efficiency for CPY. Moreover,CPY-P3was successfully applied in CPY inhibitor characterization. To our knowledge,CPY-P3is the first nonpeptide-based small-molecule fluorescent probe for the time-course CPY activity detection. Meanwhile, the generation of kelly color makes the detection directly visible without any complicated device. In all, this small-molecule probe should be a potentially useful tool in understanding the roles of CPY in protein sequencing and engineering, as well as the drug discovery of CPY-related diseases.
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