The interaction mechanisms analysis of shikonin with α-glucosidase by multi-spectroscopic and molecular docking methods

This study aimed to investigate the binding mechanism of shikonin with α-glucosidase by multi-spectroscopic and molecular docking technologies. These data suggested that shikonin spontaneously interacted with α-glucosidase primarily through hydrogen bonds (H-bond) and van der Waals forces (vdW), the quenching mechanism was static quenching. At 298 K, the quenching rate constant and binding constant were (1.00 ± 0.06) × 1012 L mol−1 s−1 and (2.32 ± 0.04) × 104 L mol−1, respectively. Molecular docking analysis also confirmed the results of the spectroscopic method. These results are helpful in understanding the interaction mechanism between shikonin and α-glucosidase.