Abstract |
α- Glucosidase is a therapeutic target for diabetes mellitus, and α- glucosidase inhibitors play a vital role in the treatments for the disease. As a kind of potentially safer α- glucosidase inhibitor, flavonoids have attached much attention currently. In this study, kaempferol was found to show a notable inhibition activity on α- glucosidase in a mixed-type manner with IC50 value of (1.16 ± 0.04) × 10(-5) mol L(-1). Analyses of fluorescence, circular dichroism and Fourier transform infrared spectra indicated that kaempferol bound to α- glucosidase with high affinity which was mainly driven by hydrogen bonds and van der Waals forces, and this binding resulted in conformational alteration of α- glucosidase. Further molecular docking study validated the experimental results. It was proposed that kaempferol may interact with some amino acid residues located within the active site of α- glucosidase, occupying the catalytic center of the enzyme to avoid the entrance of p-nitrophenyl-α-D-glucopyranoside and ultimately inhibiting the enzyme activity.
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Authors | Xi Peng, Guowen Zhang, Yijing Liao, Deming Gong |
Journal | Food chemistry
(Food Chem)
Vol. 190
Pg. 207-215
(Jan 01 2016)
ISSN: 1873-7072 [Electronic] England |
PMID | 26212963
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | Copyright © 2015 Elsevier Ltd. All rights reserved. |
Chemical References |
- Flavonoids
- Kaempferols
- kaempferol
- alpha-Glucosidases
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Topics |
- Flavonoids
(chemistry)
- Kaempferols
(chemistry)
- Kinetics
- Molecular Docking Simulation
(methods)
- Spectrum Analysis
(methods)
- alpha-Glucosidases
(chemistry, metabolism)
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