Antimicrobial mechanism of reaction products of Morus notabilis (mulberry) polyphenol oxidases and chlorogenic acid. (July 2019)

• Record Type: Journal Article
• Authors: Liu, Dan; Meng, Shuai; Xiang, Zhonghuai; He, Ningjia; Yang, Guangwei
• Is Part Of: Phytochemistry. Volume 163(2019)
• Page Start: 1
• Page End: 10
• Publication Date: 2019-07
• Subjects: Morus notabilis -- Moraceae polyphenol oxidase -- Chlorogenic acid -- Antimicrobial activities -- ELISA; Botanical chemistry -- Periodicals; Biochemistry -- Periodicals; Botany -- Periodicals; Chimie végétale -- Périodiques; 572.2
• DOI: 10.1016/j.phytochem.2019.03.026
• Languages: English
• ISSNs: 0031-9422

Abstract

Abstract: Herein, five polyphenol oxidases (PPOs) obtained from Morus notabilis (Mn) were characterized. Chlorogenic acid was the most readily oxidized substrate by these MnPPOs, and the products derived from the oxidation of chlorogenic acid by MnPPOs were tested for antimicrobial activity. The results showed that products of the five MnPPOs exhibited good inhibitory effects against Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, Sclerotinia sclerotiorum, and Botrytis cinerea . Because the products of MnPPO1 exhibited the strongest antimicrobial activity, the antimicrobial mechanism of these products was explored. The results showed that the products of MnPPO1 increased cell membrane permeability and chitinase and β-1, 3-glucanase activities. Graphical abstract: Image 1 Highlights: The products of mulberry polyphenol oxidase proved to have antimicrobial activity in vitro. The products of mulberry polyphenol oxidase increased cell membrane permeability and cell wall hydrolysis-related enzyme activity on microorganisms.