CLC number: R392.11
On-line Access: 2024-08-27
Received: 2023-10-17
Revision Accepted: 2024-05-08
Crosschecked: 2017-04-19
Cited: 0
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Heng Li, Xiao-fei Shen, Xin-e Zhou, Yan-e Shi, Lu-xia Deng, Yi Ma, Xiao-ying Wang, Jing-yu Li, Ning Huang. Antibacterial mechanism of high-mobility group nucleosomal-binding domain 2 on the Gram-negative bacteria Escherichia coli[J]. Journal of Zhejiang University Science B, 2017, 18(5): 410-420.
@article{title="Antibacterial mechanism of high-mobility group nucleosomal-binding domain 2 on the Gram-negative bacteria Escherichia coli",
author="Heng Li, Xiao-fei Shen, Xin-e Zhou, Yan-e Shi, Lu-xia Deng, Yi Ma, Xiao-ying Wang, Jing-yu Li, Ning Huang",
journal="Journal of Zhejiang University Science B",
volume="18",
number="5",
pages="410-420",
year="2017",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.B1600139"
}
%0 Journal Article
%T Antibacterial mechanism of high-mobility group nucleosomal-binding domain 2 on the Gram-negative bacteria Escherichia coli
%A Heng Li
%A Xiao-fei Shen
%A Xin-e Zhou
%A Yan-e Shi
%A Lu-xia Deng
%A Yi Ma
%A Xiao-ying Wang
%A Jing-yu Li
%A Ning Huang
%J Journal of Zhejiang University SCIENCE B
%V 18
%N 5
%P 410-420
%@ 1673-1581
%D 2017
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B1600139
TY - JOUR
T1 - Antibacterial mechanism of high-mobility group nucleosomal-binding domain 2 on the Gram-negative bacteria Escherichia coli
A1 - Heng Li
A1 - Xiao-fei Shen
A1 - Xin-e Zhou
A1 - Yan-e Shi
A1 - Lu-xia Deng
A1 - Yi Ma
A1 - Xiao-ying Wang
A1 - Jing-yu Li
A1 - Ning Huang
J0 - Journal of Zhejiang University Science B
VL - 18
IS - 5
SP - 410
EP - 420
%@ 1673-1581
Y1 - 2017
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.B1600139
Abstract: Objective: To investigate the antibacterial mechanism of high-mobility group nucleosomal-binding domain 2 (HMGN2) on Escherichia coli K12, focusing on the antibacterial and antibiofilm formation effects. Its chemotactic activity on human neutrophils was also investigated. Methods: Human tissue-derived HMGN2 (tHMGN2) was extracted from fresh uterus fiber cystadenoma and purified by HP1100 reversed-phase high-performance liquid chromatography (RP-HPLC). Recombinant human HMGN2 (rHMGN2) was generated in E. coli DE3 carrying PET-32a-c(+)-HMGN2. Antibacterial activity of HMGN2 was determined using an agarose diffusion assay and minimum inhibitory concentration (MIC) of HMGN2 was determined by the microdilution broth method. Bacterial membrane permeability assay and DNA binding assay were performed. The antibiofilm effect of HMGN2 was investigated using a crystal violet assay and electron microscopy scanning. The activating effect and chemotactic activity of HMGN2 on neutrophils were determined using a nitroblue tetrazolium (NBT) reduction assay and Transwell chamber cell migration assay, respectively. Results: HMGN2 showed a relatively high potency against Gram-negative bacteria E. coli and the MIC of HMGN2 was 16.25 μg/ml. Elevated bacterial membrane permeability was observed in HMGN2-treated E. coli K12. HMGN2 could also bind the bacterial plasmid and genomic DNA in a dose-dependent manner. The antibiofilm effect of HMGN2 on E. coli K12 was confirmed by crystal violet staining and scanning electron microscopy. However, the activating effects and chemotactic effects of HMGN2 on human neutrophils were not observed. Conclusions: As an antimicrobial peptide (AMP), HMGN2 possessed a good capacity for antibacterial and antibiofilm activities on E. coli K12. This capacity might be associated with disruption of the bacterial membrane and combination of DNA, which might affect the growth and viability of E. coli.
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