| Literature DB >> 23938956 |
Ting Wu1, Mengying He, Xixi Zang, Ying Zhou, Tianfu Qiu, Siyi Pan, Xiaoyun Xu.
Abstract
Flavonoids exhibit a broad range of biological activities including antibacterial activity. However, the mechanism of their antibacterial activity has not been fully investigated. The antibacterial activity and membrane interaction of 11 flavonoids (including 2 polymethoxyflavones and 4 isoflavonoids) against Escherichia coli were examined in this study. The antibacterial capacity was determined as flavonoids>polymethoxyflavones>isoflavonoids. Using fluorescence, it was observed that the 5 flavonoids rigidified the liposomal membrane, while the polymethoxyflavones and isoflavonoids increased membrane fluidity. There was a significant positive correlation between antibacterial capacity and membrane rigidification effect of the flavonoids. A quantitative structure-activity relationship (QSAR) study demonstrated that the activity of the flavonoid compounds can be related to molecular hydrophobicity (CLogP) and charges on C atom at position3 (C3). The QSAR model could be used to predict the antibacterial activity of flavonoids which could lead to natural compounds having important use in food and medical industry.Entities:
Keywords: Antibacterial activity; E. coli; Flavonoids; Fluorescence polarization; Membrane interaction; QSAR
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Year: 2013 PMID： 23938956 DOI： 10.1016/j.bbamem.2013.07.029
Source DB: PubMed Journal: Biochim Biophys Acta ISSN： 0006-3002