化学
胰蛋白酶
圆二色性
胃蛋白酶
猝灭(荧光)
荧光光谱法
荧光
氢键
对接(动物)
结晶学
酶
生物化学
有机化学
分子
量子力学
医学
物理
护理部
作者
Yuanyuan Yue,Qimin Tu,Yongli Guo,Yunting Wang,Yue Xu,Yilin Zhang,Jianming Liu
标识
DOI:10.1016/j.molliq.2022.120095
摘要
In this work, the binding affinity of fanetizole with proteases pepsin and trypsin were investigated by spectroscopy and molecular docking. As a thiazole derivative, the interactions of fanetizole with either pepsin or trypsin resulted in a fluorescence quenching. As such, the calculated values of K manifested that the fanetizole-pepsin system has a stronger binding affinity than fanetizole-trypsin at 296 K. Moreover, steady-state, time-resolved fluorescence and thermodynamic studies of the interaction of fanetizole with pepsin or trypsin suggested that a static fluorescence quenching mechanism and the interactions were primarily attributed to hydrogen-bonding interaction. The observed changes in synchronous fluorescence, circular dichroism spectroscopy, and FTIR results were related to the secondary construction alternations of both proteases. In line with fluorescence spectroscopy, molecular docking demonstrated similar binding characteristics and domains. The range of r values showed energy transfer from pepsin/trypsin to fanetizole.
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