title: [The interaction between genistein and beta-glucosidase].
abstract: The interaction between genistein and beta-glucosidase was studied using fluorescence quenching method and synchronous fluorimetry. The binding reaction was simultaneously studied by the AutoDock 4.2 molecular docking model. Data from fluorescence spectroscopy indicated that these interactions resulted in the endogenous fluorescence quenching of beta-glucosidase, which belongs to a static quenching mechanism. The calculated binding constants were 3.69 x 10(4), 3.06 x 10(4) and 2.36 x 10(4) L x mol(-1) at 17, 27 and 37 degrees C, respectively. The evidences from synchronous fluorescence showed the effect of genistein on the microenvironment around beta-glucosidase in aqueous solution. The inhibition test showed that the activity of beta-glucosidase could be inhibited by genistein. The determined bimolecular rate constant (k(i)) was 1.2 x 10(3) (mol x L(-1)(-1) x min(-1). Molecular docking was performed to reveal the possible binding mode or mechanism and suggested that genistein could bind strongly to beta-glucosidase. The results revealed that genistein tended to bind with beta-glucosidase mainly by hydrogen bond and hydrophobic interaction as well as electrostatic forces.
authors: Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Materials Science, Shaanxi Normal University, Xi'an 710062, China. ydzhang@snnu.edu.cn
authors: Yao-Dong
authors: YD
authors: Zhang
authors: Qun-Qun
authors: QQ
authors: Gao
authors: Cai-Hong
authors: CH
authors: Yu
mesh_terms: D019833:Genistein / Q000378:metabolism*; D062105:Molecular Docking Simulation; D011485:Protein Binding; D047428:Protein Kinase Inhibitors / Q000378:metabolism*; D013050:Spectrometry, Fluorescence; D001617:beta-Glucosidase / Q000378:metabolism*
chemical_list: D047428:Protein Kinase Inhibitors; D019833:Genistein; D001617:beta-Glucosidase