Structure and antimicrobial mechanism of ε-polylysine-chitosan conjugates through Maillard reaction

被引:76
作者
Liang, Chunxuan [1 ]
Yuan, Fang [1 ]
Liu, Fuguo [1 ]
Wang, Yingying [1 ]
Gao, Yanxiang [1 ]
机构
[1] China Agr Univ, Coll Food Sci & Nutr Engn, Beijing Key Lab Funct Food Plant Resources, Beijing 100094, Peoples R China
基金
中国国家自然科学基金;
关键词
epsilon-Polylysine-chitosan conjugate; Structure; Antimicrobial activity; ANTIBACTERIAL ACTION; BACTERICIDAL ACTION; OUTER-MEMBRANE; KILLS BACTERIA; GALACTOMANNAN; LYSOZYME; DEXTRAN; PROTEIN; CHITIN; LYSINE;
D O I
10.1016/j.ijbiomac.2014.07.012
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The aim of the study was to testify the formation and antimicrobial activity of epsilon-polylysine-chitosan conjugate through Maillard reaction. The results of UV absorbance, browning index and fluorescence changes of Maillard reaction products (MRPs) between epsilon-polylysine and chitosan indicated there existed Maillard reaction between epsilon-polylysine and chitosan and the formation of their conjugate. The conjugate showed strong antibacterial activity against Escherichia coli, Staphylococcus aureus, Bacillus subtilis and beer yeast. Morphologies of E. coli and S. aureus treated with the conjugate were observed by transmission electron microscopy (TEM). The results revealed that the conjugate of epsilon-polylysine and chitosan increased the permeability of the outer membrane (OM) and inner membrane (IM) and ultimately disrupted bacterial cell membranes, with the release of cellular cytoplasm. Crown Copyright (C) 2014 Published by Elsevier B.V. All rights reserved.
引用
收藏
页码:427 / 434
页数:8
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