Antibacterial Effect of Sesame Protein-Derived Peptides against Escherichia coli and Staphylococcus aureus: In Silico and In Vitro Analysis

文献类型： 外文期刊

第一作者： Zhu, Zehui

作者： Zhu, Zehui;Zhao, Liang;Zhao, Lei;Pan, Fei;Wang, Ou

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关键词： sesame protein; antibacterial peptides; dihydropteroate synthase; molecular docking; Escherichia coli; Staphylococcus aureus

期刊名称：NUTRIENTS （ 影响因子：5.9； 五年影响因子：6.6 ）

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年卷期： 2024 年 16 卷 1 期

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收录情况： SCI

摘要： This study aimed to screen out antibacterial peptides derived from sesame (Sesamum indicum L.) through in silico and in vitro methods. In silico proteolysis of sesame proteins with pepsin, trypsin, and chymotrypsin was performed with the online server BIOPEP-UWM. The CAMPR3 online server was used to predict the antimicrobial effect of peptides. The ToxinPred, PepCalc, and AllergenFP tools were utilized to forecast the physicochemical properties, toxicity, and allergen of the peptides. Molecular docking analysis showed that six cationic antimicrobial peptides could directly interact with the key sites of dihydropteroate synthase, whereas Ala-Gly-Gly-Val-Pro-Arg and Ser-Thr-Ile-Arg exhibited the strongest binding affinity. In vitro antibacterial experiment showed the minimum inhibitory concentration (MIC) of Ser-Thr-Ile-Arg against Escherichia coli and Staphylococcus aureus was 1024 and 512 mu g/mL, respectively. Meanwhile, MIC of Ala-Gly-Gly-Val-Pro-Arg against both bacterial species was 512 mu g/mL. Our results suggest that peptides from sesame possess the ability to potentially hinder bacterial activity.

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