期刊
FRONTIERS IN NUTRITION
卷 8, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fnut.2021.710862
关键词
bacteriocin; purification; pentocin ZFM94; antibacterial activity; mode of action
资金
- National Natural Science Foundation of China [U20A2066]
- Key Research and Development Program of Zhejiang Province [2020C04002]
- Natural Science Foundation of Zhejiang Province [LZ21C200001]
Pentocin ZFM94, a bacteriocin produced by L. pentosus ZFM94, showed broad-spectrum antimicrobial activity, heat stability, and induced cell membrane disruption leading to cellular leakage.
Bacteriocins are bioactive antimicrobial peptides synthesized in the ribosome of numerous bacteria and released extracellularly. Pentocin ZFM94 produced by Lactobacillus pentosus (L. pentosus) ZFM94, isolated from infant feces with strong antibacterial activity, was purified by ammonium sulfate precipitation, dextran gel chromatography, and reverse-phase high-performance liquid chromatography (RP-HPLC). The molecular mass of the purified bacteriocin was 3,547.74 Da determined by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). Pentocin ZFM94 exhibited broad-spectrum antimicrobial activity against tested Gram-positive and Gram-negative bacteria, and the minimal inhibitory concentrations (MICs) of Micrococcus luteus (M. luteus) 10,209, Staphylococcus aureus (S. aureus) D48, and Escherichia coli (E. coli) DH5 alpha were 1.75, 2.00, and 2.50 mu m, respectively. Pentocin ZFM94 was heat-stable (30 min at 80 degrees C) and showed inhibitory activity over a wide pH range (5.00-7.00). It could be degraded by trypsin and pepsin, but not by amylase, lysozyme, lipase, and ribonuclease A. Fluorescence leakage assay showed that pentocin ZFM94 induced disruption of the cell membrane and caused leakage of cellular content. Furthermore, lipid II was not an antibacterial target of pentocin ZFM94. This study laid the foundation for further development and utilization of L. pentosus ZFM94 and its bacteriocin.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据