Novel ACE inhibitory tripeptides from ovotransferrin using bioinformatics and peptidomics approaches

Abstract

AbstractFood-derived ACE inhibitory peptides have recently attracted increased attention. This work focused on a more efficientin silicomethod to find ACE inhibitory peptides from ovotransferrin. In this work, ovotransferrin was digested into peptides by virtual enzymolysis. Subsequently,in vitroACE inhibitory activity of potential tripeptides was conducted following the peptide score, toxicity, and water solubility prediction. Both pharmacophore study and flexible docking were applied to analyze ACE inhibition mechanism of tripeptides. Our results demonstrated that EWL was a potent ACE inhibitory tripeptide with IC50value of 380 ± 10 μM. Besides, pharmacophore and flexible docking showed that the pi interaction and hydrogen bond were the key interactions in ACE-EWL complex. It appears that thein vitroACE inhibitory activity of tripeptide EWL was consistent with its molecular modeling.