1. The inhibition mechanism of luteolin on peroxidase based on multispectroscopic techniques.
- Author
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Li F, Fu Y, Yang H, and Tang Y
- Subjects
- Binding Sites, Circular Dichroism, Enzyme Inhibitors chemistry, Horseradish Peroxidase chemistry, Horseradish Peroxidase metabolism, Kinetics, Luteolin chemistry, Molecular Docking Simulation, Protein Binding, Spectroscopy, Fourier Transform Infrared, Enzyme Inhibitors pharmacology, Horseradish Peroxidase antagonists & inhibitors, Luteolin pharmacology
- Abstract
Luteolin, a plant-derived flavonoid, was found to exert effective inhibitory effect to peroxidase activity in a non-competitive manner with an IC
50 of (6.62 ± 0.45) × 10-5 mol L-1 . The interaction between luteolin and peroxidase induced the formation of a static complex with a binding constant (Ksv ) of 7.31 × 103 L mol-1 s-1 driven by hydrogen bond and hydrophobic interaction. Further, the molecular interaction between luteolin and peroxidase resulted in intrinsic fluorescence quenching, structural and conformational alternations which were determined by multispectroscopic techniques combined with computational molecular docking. Molecular docking results revealed that luteolin bound to peroxidase and interacted with relevant amino acid residues in the hydrophobic pocket. These results will provide information for screening additional peroxidase inhibitors and provide evidence of luteolin's potential application in preservation and processing of fruit and vegetables and clinical disease remedy., Competing Interests: Declaration of competing interest The authors declare that they have no competing interests., (Copyright © 2020 Elsevier B.V. All rights reserved.)- Published
- 2021
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