食品工业科技2025，Vol.46Issue(5)：63-71,9.DOI:10.13386/j.issn1002-0306.2024030182
染料木素对α-葡萄糖苷酶的抑制及分子机制
Inhibitory Effect of Genistein on α-Glucosidase and Its Molecular Mechanism
摘要
Abstract
To investigate the inhibitory effects of genistein on α-glucosidase activity,the effects of genistein on starch digestion characteristics were determined by in vitro digestion assays.The type and molecular mechanism of inhibition were examined based on enzyme kinetics,fluorescence spectroscopy,and molecular docking analyses.The results indicated that treatment with genistein significantly reduced the content of rapidly digestible starch(P＜0.05)and promoted notable increases in the content of slowly digestible starch and resistant starch(P＜0.05).Genistein inhibited α-glucosidase dose dependently,with an IC50 value of 1.10±0.06 mg/mL,and the inhibition type was identified to be predominantly competitive within a mixed reversible inhibition.Genistein quenching the intrinsic fluorescence of α-glucosidase with a mixed pattern by binding to the ground state fluorescent groups and colliding with the excited state fluorescent groups.The binding free energy from molecular docking was less than-12 kJ/mol,indicating that the binding of genistein to α-glucosidase could occur spontaneously.Moreover,genistein targeted the hydrophobic pocket of α-glucosidase,forming hydrophobic interactions with residues Glu-429,Lys-432,and Ile-419,and hydrogen bonds with Gly-161,Asn-235,Asn-317,Glu-422,and His-423.These interactions contributed to stabilizing the binding of genistein to α-glucosidase,thereby reducing its catalytic activity.The findings provide theoretical support for the application of genistein in functional foods for blood glucose stabilization.关键词
染料木素/淀粉消化/α-葡萄糖苷酶/抑制/荧光光谱/分子对接Key words
genistein/starch digestion/α-glucosidase/inhibition/fluorescence spectroscopy/molecular docking分类
轻工纺织引用本文复制引用
贾健辉,窦博鑫,高嫚,张楚佳,刘颖,张娜..染料木素对α-葡萄糖苷酶的抑制及分子机制[J].食品工业科技,2025,46(5):63-71,9.基金项目
黑龙江省"百千万"工程科技重大专项(2021ZX12B07) （2021ZX12B07）
国家自然科学基金面上项目(32072258) （32072258）
国家重点研发计划(2021YFD2100902-3). （2021YFD2100902-3）
