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[Interaction between gomizine D and α-glucosidase].

This paper describes a study exploring the interaction between gomizine D and α-glucosidase. The inhibitory activity of α-glucosidase by gomizine D was determined using PNPG as substrates Gomizine D gave the IC₅₀ value of 0.59 mmol•L⁻¹, which was higher than that of acarbose (1.95 mmol•L⁻¹). Gomizine D was a reversible and non-competitiveα-glucosidase inhibitor with an inhibition constant Ki=4.026 g•L⁻¹. The binding mode between gomizine D and α-glucosidase was analyzed by AutoDock Vina molecular docking software. The lowest energy of Gomizine D binding to α-glucosidase was -7.7 kcal•mol⁻¹, which was lower than that of acarbose (-6.6 kcal•mol⁻¹). After binding with gomizine D, UV spectroscopy analysis displayed that the microenvironment of aromatic residue in the secondary structure of α-glucosidase was changed, and the polarity of protein was reduced.