1
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Liu S, Cong H, Yu B, Shen Y. Screening of a short chain antimicrobial peptide-LKLHI and its application in hydrogels for wound healing. Int J Biol Macromol 2023; 238:124056. [PMID: 36948339 DOI: 10.1016/j.ijbiomac.2023.124056] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Revised: 03/02/2023] [Accepted: 03/13/2023] [Indexed: 03/24/2023]
Abstract
Antibacterial peptides have been widely used in the field of antibacterial due to their biocompatibility. In this work, owing to quickly screen out peptides with antibacterial effects, the bacterial membranes of E. coli and S. aureus were extracted and fixed on self-made silica gel microspheres to prepare bacterial membrane chromatography stationary phase. We successfully screened antimicrobial peptides from a peptide library composed of one-bead-one-compound by bacterial membrane chromatography. The antibacterial peptide has an effective defense effect on gram-positive bacteria, gram-negative bacteria, and fungi. In addition, the antibacterial peptide has almost no hemolysis and cytotoxicity and other excellent biocompatibility and has excellent properties such as stability, broad-spectrum antibacterial, and promotion of wound healing,and HA hydrogel carrier loaded with antimicrobial peptides was prepared, which provided the application direction of antimicrobial dressings for antimicrobial peptides. In summary, this method can screen out polypeptides with antibacterial effects, and the screened-out antibacterial peptides are expected to be applied in clinical applications.
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Affiliation(s)
- Shixiang Liu
- College of Chemistry and Chemical Engineering, College of Materials Science and Engineering, Institute of Biomedical Materials and Engineering, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, PR China
| | - Hailin Cong
- College of Chemistry and Chemical Engineering, College of Materials Science and Engineering, Institute of Biomedical Materials and Engineering, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, PR China; School of Materials Science and Engineering, Shandong University of Technology, Zibo 255000, PR China.
| | - Bing Yu
- College of Chemistry and Chemical Engineering, College of Materials Science and Engineering, Institute of Biomedical Materials and Engineering, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, PR China.
| | - Youqing Shen
- College of Chemistry and Chemical Engineering, College of Materials Science and Engineering, Institute of Biomedical Materials and Engineering, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, PR China; Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Center for Bionanoengineering, and Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, PR China
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2
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Jin X, Hu X, Jiang S, Zhao T, Zha Y, Wei S, Zhao J, Wang M, Zhang Y. Temporin-GHb-Derived Peptides Exhibit Potent Antibacterial and Antibiofilm Activities against Staphylococcus aureus In Vitro and Protect Mice from Acute Infectious Pneumonia. ACS Infect Dis 2023; 9:840-855. [PMID: 36862073 DOI: 10.1021/acsinfecdis.2c00544] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
Abstract
With the continuous development of drug resistance in bacteria to traditional antibiotics, the demand for novel antibacterial agents is urgent. Antimicrobial peptides (AMPs) are promising candidates because of their unique mechanism of action and low tendency to induce drug resistance. Previously, we cloned temporin-GHb (hereafter referred to simply as "GHb") from Hylarana guentheri. In this study, a series of derived peptides were designed, namely, GHbR, GHbK, GHb3K, GHb11K, and GHbK4R. The five derived peptides had stronger antibacterial activities against Staphylococcus aureus than the parent peptide GHb and could effectively inhibit the formation of biofilms and eradicate mature biofilms in vitro. GHbR, GHbK, GHb3K, and GHbK4R exerted bactericidal effects by disrupting membrane integrity. However, GHb11K exhibited bacteriostatic efficacy with toroidal pore formation on the cell membrane. In comparison to GHbK4R, GHb3K showed much lower cytotoxicity against A549 alveolar epithelial cells, with an IC50 > 200 μM, which was much higher than its minimal inhibitory concentration (MIC = 3.1 μM) against S. aureus. The anti-infection potential of GHbK4R and GHb3K was investigated in vivo. Compared with vancomycin, the two peptides displayed significant efficacy in a mouse model of acute pneumonia infected with S. aureus. Both GHbK4R and GHb3K also had no obvious toxicity to normal mice after intraperitoneal administration (15 mg/kg) for 8 days. Our results indicate that GHb3K and GHbK4R might be promising candidates for the treatment of bacterial pneumonia infected with S. aureus.
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3
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Zhang H, Chen C, Yang Z, Ye L, Miao J, Lan Y, Wang Q, Ye Z, Cao Y, Liu G. Combined transcriptomic and proteomic analysis of the antibacterial mechanisms of an antimicrobial substance produced by Lactobacillus paracasei FX-6 against colistin-resistant Escherichia coli. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.114394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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4
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Molecular Insights into the Mode of Action of Antibacterial Peptides Derived from Chicken Plasma Hydrolysates. Foods 2022; 11:foods11223564. [PMID: 36429156 PMCID: PMC9689829 DOI: 10.3390/foods11223564] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Revised: 10/29/2022] [Accepted: 11/06/2022] [Indexed: 11/11/2022] Open
Abstract
Due to the overuse and abuse of antibiotics, several antibiotic resistant bacteria have emerged. Antimicrobial peptides (AMPs) have gained attention as alternative antimicrobial agents because of their unique mode of action that impedes bacterial resistance. Two novel antibacterial peptides were isolated from Alcalase-hydrolyzed chicken plasma by size exclusion and reverse-phase chromatography. They were identified by LC-MS/MS to be VSDH and CCCPKAF, which showed effective antibacterial activity toward Bacillus cereus DMST 5040, with varied modes of action. The peptide CCCPKAF caused cell membrane disintegration, as evidenced by propidium iodide (PI) uptake. In contrast, the peptide VSDH targeted intracellular molecules, including proteins and nucleic acids, as revealed by Synchrotron-based Fourier Transform Infrared (SR-FTIR). The secondary structure of intracellular proteins increased to a β-sheet structure concomitant with a decrease in the α-helix structure when exposed to 0.5 mM VSDH. Molecular docking analysis revealed that VSDH showed high binding affinity for the active sites of the various enzymes involved in DNA synthesis. In addition, it showed good affinity for a chaperone protein (Dnak), resulting in the misfolding of intracellular proteins. Nuclear magnetic resonance (NMR) and molecular dynamics simulations also indicated that VSDH chelated well with Mg2+, which could partly contribute to its antibacterial activity.
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5
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Antibacterial Peptide NP-6 Affects Staphylococcus aureus by Multiple Modes of Action. Int J Mol Sci 2022; 23:ijms23147812. [PMID: 35887160 PMCID: PMC9319634 DOI: 10.3390/ijms23147812] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 06/30/2022] [Accepted: 07/13/2022] [Indexed: 02/01/2023] Open
Abstract
Our previous study extracted and identified an antibacterial peptide that was named NP-6. Herein, we investigated the physicochemical properties of NP-6, and elucidated the mechanisms underlying its antimicrobial activity against Staphylococcus aureus. The results showed that the hemolysis activity of NP-6 was 2.39 ± 0.13%, lower than Nisin A (3.91 ± 0.43%) at the same concentration (512 µg/mL). Negligible cytotoxicity towards RAW264.7 cells was found when the concentration of NP-6 was lower than 512 µg/mL. In addition, it could keep most of its activity in fetal bovine serum. Moreover, transmission electron microscopy, confocal laser scanning microscopy, and flow cytometry results showed that NP-6 can destroy the integrity of the bacterial cell membrane and increase the membrane permeability. Meanwhile, NP-6 had binding activity with bacterial DNA and RNA in vitro and strongly inhibited the intracellular β-galactosidase activity of S. aureus. Our findings suggest that NP-6 could be a promising candidate against S. aureus.
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6
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Zhao Q, He L, Wang X, Ding X, Li L, Tian Y, Huang A. Characterization of a Novel Antimicrobial Peptide Isolated from Moringa oleifera Seed Protein Hydrolysates and Its Membrane Damaging Effects on Staphylococcus aureus. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:6123-6133. [PMID: 35576531 DOI: 10.1021/acs.jafc.2c01335] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The present study sought to identify and characterize a novel antimicrobial peptide, named MOp2 from Moringa oleifera seed protein hydrolysates, and elucidate its potential antimicrobial effects on Staphylococcus aureus. MOp2, with the amino acid sequence of His-Val-Leu-Asp-Thr-Pro-Leu-Leu (HVLDTPLL), was characterized as a hydrophobic anionic AMP of the β-sheet structure. MOp2 exhibited negligible hemolytic activity at 2.0× MIC, suggesting its inhibitory effect on the growth of S. aureus (MIC: 2.204 mM). It maintained more than 90% of antimicrobial activity under 5% salt and about 78% of antimicrobial activity at a high temperature of 115 °C for 30 min. Protease, especially acid protease, reduced its antimicrobial activity to different extents. Moreover, MOp2 caused irreversible membrane damage to S. aureus cells by increasing the membrane permeability, resulting in the release of intracellular nucleotide pools. Additionally, molecular docking revealed that MOp2 could inhibit S. aureus growth by interacting with dihydrofolate reductase and DNA gyrase through hydrogen bonding and hydrophobic interactions. Overall, MOp2 could be a potential novel antimicrobial agent against S. aureus in food processing.
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Affiliation(s)
- Qiong Zhao
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, Yunnan, China
| | - Li He
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, Yunnan, China
| | - Xuefeng Wang
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, Yunnan, China
| | - Xuesong Ding
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, Yunnan, China
| | - Lige Li
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, Yunnan, China
| | - Yang Tian
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, Yunnan, China
| | - Aixiang Huang
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, Yunnan, China
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7
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Tan YS, Zhang RK, Liu ZH, Li BZ, Yuan YJ. Microbial Adaptation to Enhance Stress Tolerance. Front Microbiol 2022; 13:888746. [PMID: 35572687 PMCID: PMC9093737 DOI: 10.3389/fmicb.2022.888746] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 03/18/2022] [Indexed: 01/28/2023] Open
Abstract
Microbial cell factories have been widely used in the production of various chemicals. Although synthetic biology is useful in improving the cell factories, adaptation is still widely applied to enhance its complex properties. Adaptation is an important strategy for enhancing stress tolerance in microbial cell factories. Adaptation involves gradual modifications of microorganisms in a stressful environment to enhance their tolerance. During adaptation, microorganisms use different mechanisms to enhance non-preferred substrate utilization and stress tolerance, thereby improving their ability to adapt for growth and survival. In this paper, the progress on the effects of adaptation on microbial substrate utilization capacity and environmental stress tolerance are reviewed, and the mechanisms involved in enhancing microbial adaptive capacity are discussed.
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Affiliation(s)
- Yong-Shui Tan
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin, China.,Synthetic Biology Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin, China
| | - Ren-Kuan Zhang
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin, China.,Synthetic Biology Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin, China
| | - Zhi-Hua Liu
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin, China.,Synthetic Biology Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin, China
| | - Bing-Zhi Li
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin, China.,Synthetic Biology Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin, China
| | - Ying-Jin Yuan
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin, China.,Synthetic Biology Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin, China
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8
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Wang Q, Miao J, Feng K, Liu J, Li W, Li J, Yang Z, Cao Y. Antibacterial action of peptide F1 against colistin resistance E. coli SHP45 ( mcr-1). Food Funct 2021; 11:10231-10241. [PMID: 33169751 DOI: 10.1039/d0fo01923b] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The emergence of the plasmid-mediated colistin resistance mechanism (mcr-1) makes bacterial resistance to colistin increasingly serious. This mcr-1 mediated bacterial resistance to colicin is conferred primarily through modification of lipid A in lipopolysaccharides (LPS). In our previous research, antimicrobial peptide F1 was derived from Tibetan kefir and has been shown to effectively inhibit the growth of Gram-negative bacteria (E. coli), Gram-positive bacteria (Staphylococcus aureus), and other pathogenic bacteria. Based on this characteristic of antibacterial peptide F1, we speculated that it could inhibit the growth of the colicin-resistant E. coli SHP45 (mcr-1) and not easily produce drug resistance. Studies have shown that antimicrobial peptide F1 can destroy the liposome structure of the phospholipid bilayer by destroying the inner and outer membranes of bacteria, thereby significantly inhibiting the growth of E. coli SHP45 (mcr-1), but without depending on LPS. The results of this study confirmed our hypothesis, and we anticipate that antimicrobial peptide F1 will become a safe antibacterial agent that can assist in solving the problem of drug resistance caused by colistin.
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Affiliation(s)
- Qun Wang
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Sciences, South China Agricultural University, Guangzhou, Guangdong 510642, China.
| | - Jianyin Miao
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Sciences, South China Agricultural University, Guangzhou, Guangdong 510642, China.
| | - Konglong Feng
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Sciences, South China Agricultural University, Guangzhou, Guangdong 510642, China.
| | - Jianhua Liu
- National Risk Assessment Laboratory for Antimicrobial Resistance of Microorganisms in Animals, College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Wei Li
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Sciences, South China Agricultural University, Guangzhou, Guangdong 510642, China.
| | - Jun Li
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Sciences, South China Agricultural University, Guangzhou, Guangdong 510642, China.
| | - Zhijie Yang
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Sciences, South China Agricultural University, Guangzhou, Guangdong 510642, China.
| | - Yong Cao
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Sciences, South China Agricultural University, Guangzhou, Guangdong 510642, China.
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9
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Yang H, Yao S, Zhang M, Wu C. Heat Adaptation Induced Cross Protection Against Ethanol Stress in Tetragenococcus halophilus: Physiological Characteristics and Proteomic Analysis. Front Microbiol 2021; 12:686672. [PMID: 34220775 PMCID: PMC8249775 DOI: 10.3389/fmicb.2021.686672] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Accepted: 05/03/2021] [Indexed: 11/29/2022] Open
Abstract
Ethanol is a toxic factor that damages membranes, disturbs metabolism, and may kill the cell. Tetragenococcus halophilus, considered as the cell factory during the manufacture of traditional fermented foods, encounters ethanol stress, which may affect the viability and fermentative performance of cells. In order to improve the ethanol tolerance of T. halophilus, a strategy based on cross protection was proposed in the current study. The results indicated that cross protection induced by heat preadaptation (45°C for 1.5 h) could significantly improve the stress tolerance (7.24-fold increase in survival) of T. halophilus upon exposure to ethanol (10% for 2.5 h). Based on this result, a combined analysis of physiological approaches and TMT-labeled proteomic technology was employed to investigate the protective mechanism of cross protection in T. halophilus. Physiological analysis showed that the heat preadapted cells exhibited a better surface phenotype, higher membrane integrity, and higher amounts of unsaturated fatty acids compared to unadapted cells. Proteomic analysis showed that a total of 163 proteins were differentially expressed in response to heat preadaptation. KEGG enrichment analysis showed that energy metabolism, membrane transport, peptidoglycan biosynthesis, and genetic information processing were the most abundant metabolic pathways after heat preadaptation. Three proteins (GpmA, AtpB, and TpiA) involved in energy metabolism and four proteins (ManM, OpuC, YidC, and HPr) related to membrane transport were up-regulated after heat preadaptation. In all, the results of this study may help understand the protective mechanisms of preadaptation and contribute to the improvement of the stress resistance of T. halophilus during industrial processes.
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Affiliation(s)
- Huan Yang
- College of Biomass Science and Engineering, Sichuan University, Chengdu, China.,Key Laboratory of Leather Chemistry and Engineering, Ministry of Education, Sichuan University, Chengdu, China
| | - Shangjie Yao
- College of Biomass Science and Engineering, Sichuan University, Chengdu, China.,Key Laboratory of Leather Chemistry and Engineering, Ministry of Education, Sichuan University, Chengdu, China
| | - Min Zhang
- College of Biomass Science and Engineering, Sichuan University, Chengdu, China.,Key Laboratory of Leather Chemistry and Engineering, Ministry of Education, Sichuan University, Chengdu, China
| | - Chongde Wu
- College of Biomass Science and Engineering, Sichuan University, Chengdu, China.,Key Laboratory of Leather Chemistry and Engineering, Ministry of Education, Sichuan University, Chengdu, China
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10
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Li Y, Lin X, Hu J, Shuai J, Wei Y, He D. Synthesis and biological evaluation of stilbene-based peptoid mimics against the phytopathogenic bacterium Xanthomonas citri pv. citri. PEST MANAGEMENT SCIENCE 2021; 77:343-353. [PMID: 32741107 DOI: 10.1002/ps.6024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 07/26/2020] [Accepted: 08/01/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND The emergence of drug-resistant phytopathogenic bacteria and the need for new types of biological disease-control agents have accelerated efforts toward searching for alternative candidates with a low propensity for resistance development. In this study, a new series of stilbene-based peptoid mimics were synthesized, and their biological activities were evaluated against citrus pathogenic bacteria in vitro and in vivo. RESULTS Antibacterial bioassay results showed that the dicationic peptoid mimics 9a and 9b displayed excellent bioactivity against Xanthomonas citri pv. citri, with the minimum inhibitory concentration values of 25 μM, which were superior to those of commercial copper biocides Delite (200 μM) and Kasumin Bordeaux (100 μM). In vivo bioassay further confirmed their control efficacy against plant bacterial diseases. In addition, the antibacterial mechanism of action elucidated their membrane-disruption effects resulting in the leakage of the bacterial membranes, which was similar to that of antimicrobial peptides. Moreover, the inhibition effect on biofilm formation of peptoid mimics has also been demonstrated. CONCLUSION Stilbene-based peptoid mimics synthesized in this study showed promising antibacterial activity with a potent membrane-disruptive mechanism. The results suggested that stilbene-based peptoid mimics have the potential as a candidate new type of bactericide for citrus disease protection.
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Affiliation(s)
- Yan Li
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Xingdong Lin
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Jianqing Hu
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Jianbo Shuai
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Yinan Wei
- Department of Chemistry, College of Arts and Sciences, University of Kentucky, Lexington, Kentucky, 40506, USA
| | - Daohang He
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China
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11
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Zhang R, Fan X, Jiang X, Zou M, Xiao H, Wu G. Multiple Mechanisms of the Synthesized Antimicrobial Peptide TS against Gram-Negative Bacteria for High Efficacy Antibacterial Action In Vivo. Molecules 2020; 26:molecules26010060. [PMID: 33374458 PMCID: PMC7795306 DOI: 10.3390/molecules26010060] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 12/20/2020] [Accepted: 12/21/2020] [Indexed: 12/02/2022] Open
Abstract
The emergence of drug-resistant bacteria emphasizes the urgent need for novel antibiotics. The antimicrobial peptide TS shows extensive antibacterial activity in vitro and in vivo, especially in gram-negative bacteria; however, its antibacterial mechanism is unclear. Here, we find that TS without hemolytic activity disrupts the integrity of the outer bacterial cell membrane by displacing divalent cations and competitively binding lipopolysaccharides. In addition, the antimicrobial peptide TS can inhibit and kill E. coli by disintegrating the bacteria from within by interacting with bacterial DNA. Thus, antimicrobial peptide TS’s multiple antibacterial mechanisms may not easily induce bacterial resistance, suggesting use as an antibacterial drug to be for combating bacterial infections in the future.
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Affiliation(s)
- Rui Zhang
- Medical School, Southeast University, Nanjing 210009, China; (R.Z.); (X.F.); (X.J.); (M.Z.); (H.X.)
| | - Xiaobo Fan
- Medical School, Southeast University, Nanjing 210009, China; (R.Z.); (X.F.); (X.J.); (M.Z.); (H.X.)
| | - Xinglu Jiang
- Medical School, Southeast University, Nanjing 210009, China; (R.Z.); (X.F.); (X.J.); (M.Z.); (H.X.)
| | - Mingyuan Zou
- Medical School, Southeast University, Nanjing 210009, China; (R.Z.); (X.F.); (X.J.); (M.Z.); (H.X.)
| | - Han Xiao
- Medical School, Southeast University, Nanjing 210009, China; (R.Z.); (X.F.); (X.J.); (M.Z.); (H.X.)
| | - Guoqiu Wu
- Medical School, Southeast University, Nanjing 210009, China; (R.Z.); (X.F.); (X.J.); (M.Z.); (H.X.)
- Jiangsu Provincial Key Laboratory of Critical Care Medicine, Southeast University, Nanjing 210009, China
- Department of Clinical Laboratory Medicine, Zhongda Hospital, Southeast University, Nanjing 210009, China
- Correspondence: ; Tel.: +86-25-83272503
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12
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Wang L, Sathuvan M, Chen S, Cai K, Chen S, Liu Y. Purification and stability analysis of antimicrobial proteins from Varuna litterata. Microb Pathog 2020; 153:104637. [PMID: 33232765 DOI: 10.1016/j.micpath.2020.104637] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 09/22/2020] [Accepted: 11/17/2020] [Indexed: 10/22/2022]
Abstract
Ten marine species, including different crabs, bivalve molluscs, and fish intestines were selected to screen the natural antimicrobial protein or peptide as they are enriched with various microorganisms. The crude extract from Varuna litterata, a marine crab which is used as a raw material in the preparation of pickled crabs in Chaoshan area of China, was proved to have a potent bacteriostatic effect against gram-negative bacterium (Escherichia coli) and gram-positive bacterium(Staphylococcus aureus) compared with other marine species. The crude proteins of Varunalitterata were salted-out for preliminary purification and further purified by gel filtration (Sephadex G-150) or anion exchange (DEAE-cellulose 52) chromatographic column. An increase in the antimicrobial activity was noted with the increase in the purity level of the protein. A relatively pure protein was eventually obtained, which was determined to be belonging to the hemocyanin family based on the mass spectrometric data analysis. The purified proteins solution (1 mg/ml) from Varuna litterata exhibited similar antimicrobial activity to that of gentamycin sulfate (0.2 mg/ml), which were relatively stable in a certain pH or temperature range. A structure-activity relationship of the purified hemocyanin was determined based on the interaction of hemocyanin and different chromatographic medium, which revealed that the integrated hexamers played a remarkable role in its bacteriostatic activity. Moreover, the phenoloxidase activity of hemocyanin from Varuna litterata was found as the underlying cause of its antimicrobial potential.
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Affiliation(s)
- Liming Wang
- Department of Biology & Guangdong Provincial Key Laboratory of Marine Biotechnology, Institute of Marine Sciences, College of Science, Shantou University, Shantou, Guangdong, 515063, PR China
| | - Malairaj Sathuvan
- Department of Biology & Guangdong Provincial Key Laboratory of Marine Biotechnology, Institute of Marine Sciences, College of Science, Shantou University, Shantou, Guangdong, 515063, PR China
| | - Shengqin Chen
- Department of Biology & Guangdong Provincial Key Laboratory of Marine Biotechnology, Institute of Marine Sciences, College of Science, Shantou University, Shantou, Guangdong, 515063, PR China
| | - Kun Cai
- Department of Biology & Guangdong Provincial Key Laboratory of Marine Biotechnology, Institute of Marine Sciences, College of Science, Shantou University, Shantou, Guangdong, 515063, PR China
| | - Shan Chen
- Department of Biology & Guangdong Provincial Key Laboratory of Marine Biotechnology, Institute of Marine Sciences, College of Science, Shantou University, Shantou, Guangdong, 515063, PR China
| | - Yang Liu
- Department of Biology & Guangdong Provincial Key Laboratory of Marine Biotechnology, Institute of Marine Sciences, College of Science, Shantou University, Shantou, Guangdong, 515063, PR China.
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13
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Zhou W, Du Y, Li X, Yao C. Lipoic acid modified antimicrobial peptide with enhanced antimicrobial properties. Bioorg Med Chem 2020; 28:115682. [DOI: 10.1016/j.bmc.2020.115682] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 07/23/2020] [Accepted: 07/27/2020] [Indexed: 12/14/2022]
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14
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Bi J, Tian C, Jiang J, Zhang GL, Hao H, Hou HM. Antibacterial Activity and Potential Application in Food Packaging of Peptides Derived from Turbot Viscera Hydrolysate. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:9968-9977. [PMID: 32841003 DOI: 10.1021/acs.jafc.0c03146] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
As a good choice for food preservation, antimicrobial peptides (AMPs) have received much attention in recent years. In this paper, peptides derived from the turbot viscera hydrolysate were identified by ultraperformance liquid chromatography-quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF-MS/MS), and the physicochemical properties and structural characteristics were analyzed by in silico tools. Furthermore, three cationic peptides with potential hydrophobicity and amphipathy were synthesized; their cytotoxicity, hemolysis, and antibacterial activities were investigated. In particular, Sm-A1 (GITDLRGMLKRLKKMK), a peptide with 16 amino acids, showed an outstanding antibacterial activity against both Gram-positive and Gram-negative bacteria by damaging the cell membrane integrity. Moreover, Sm-A1 was successfully loaded into hydroxyl-rich poly(vinyl alcohol) (PVA)/chitosan (CS) hydrogel to improve the antibacterial activity and biofilm inhibition effect. PVA/CS+7.5‰ Sm-A1 hydrogel can satisfactorily protect the salmon muscle from the microbiological contamination and texture deterioration.
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Affiliation(s)
- Jingran Bi
- School of Food Science and Technology, Dalian Polytechnic University, No. 1, Qinggongyuan, Ganjingzi District, Dalian, Liaoning 116034, People's Republic of China
- Liaoning Key Lab for Aquatic Processing Quality and Safety, No. 1, Qinggongyuan, Ganjingzi District, Dalian, Liaoning 116034, People's Republic of China
| | - Chuan Tian
- School of Food Science and Technology, Dalian Polytechnic University, No. 1, Qinggongyuan, Ganjingzi District, Dalian, Liaoning 116034, People's Republic of China
- Liaoning Key Lab for Aquatic Processing Quality and Safety, No. 1, Qinggongyuan, Ganjingzi District, Dalian, Liaoning 116034, People's Republic of China
| | - Jinghui Jiang
- School of Food Science and Technology, Dalian Polytechnic University, No. 1, Qinggongyuan, Ganjingzi District, Dalian, Liaoning 116034, People's Republic of China
- Liaoning Key Lab for Aquatic Processing Quality and Safety, No. 1, Qinggongyuan, Ganjingzi District, Dalian, Liaoning 116034, People's Republic of China
| | - Gong-Liang Zhang
- School of Food Science and Technology, Dalian Polytechnic University, No. 1, Qinggongyuan, Ganjingzi District, Dalian, Liaoning 116034, People's Republic of China
- Liaoning Key Lab for Aquatic Processing Quality and Safety, No. 1, Qinggongyuan, Ganjingzi District, Dalian, Liaoning 116034, People's Republic of China
| | - Hongshun Hao
- School of Food Science and Technology, Dalian Polytechnic University, No. 1, Qinggongyuan, Ganjingzi District, Dalian, Liaoning 116034, People's Republic of China
- Liaoning Key Lab for Aquatic Processing Quality and Safety, No. 1, Qinggongyuan, Ganjingzi District, Dalian, Liaoning 116034, People's Republic of China
| | - Hong-Man Hou
- School of Food Science and Technology, Dalian Polytechnic University, No. 1, Qinggongyuan, Ganjingzi District, Dalian, Liaoning 116034, People's Republic of China
- Liaoning Key Lab for Aquatic Processing Quality and Safety, No. 1, Qinggongyuan, Ganjingzi District, Dalian, Liaoning 116034, People's Republic of China
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15
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Identification and antimicrobial mechanisms of a novel peptide derived from egg white ovotransferrin hydrolysates. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2020.109720] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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16
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Zhou L, Liu Z, Xu G, Li L, Xuan K, Xu Y, Zhang R. Expression of Melittin in Fusion with GST in Escherichia coli and Its Purification as a Pure Peptide with Good Bacteriostatic Efficacy. ACS OMEGA 2020; 5:9251-9258. [PMID: 32363276 PMCID: PMC7191569 DOI: 10.1021/acsomega.0c00085] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Accepted: 03/23/2020] [Indexed: 05/10/2023]
Abstract
The expression and purification of melittin (MET) in microbials are difficult because of its antibacterial activities. In this work, MET was fused with a glutathione-S-transferase (GST) tag and expressed in Escherichia coli to overcome its lethality to host cells. The fusion protein GST-MET was highly expressed and then purified by glutathione sepharose high-performance affinity chromatography, digested with prescission protease, and further purified by Superdex Peptide 10/300 GL chromatography. Finally, 3.5 mg/L recombinant melittin (rMET) with a purity of >90% was obtained; its antibacterial activities against Gram-positive Bacillus pumilus and Staphylococcus pasteuri were similar to those of commercial MET. A circular dichroism spectroscopic assay showed that the rMET peptide secondary structure was similar to those of the commercial form. To our knowledge, this is the report of the preparation of active pure rMET with no tags. The successful expression and purification of rMET will enable large-scale, industrial biosynthesis of MET.
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Affiliation(s)
- Lixian Zhou
- Key
Laboratory of Industrial Biotechnology, Ministry of Education, School
of Biotechnology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, P.
R. China
| | - Zhiyong Liu
- Key
Laboratory of Industrial Biotechnology, Ministry of Education, School
of Biotechnology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, P.
R. China
| | - Guanyu Xu
- Xuteli
School, Beijing Institute of Technology, Beijing 100081, P. R. China
| | - Lihong Li
- Key
Laboratory of Industrial Biotechnology, Ministry of Education, School
of Biotechnology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, P.
R. China
| | - Kaiang Xuan
- Key
Laboratory of Industrial Biotechnology, Ministry of Education, School
of Biotechnology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, P.
R. China
| | - Yan Xu
- Key
Laboratory of Industrial Biotechnology, Ministry of Education, School
of Biotechnology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, P.
R. China
| | - Rongzhen Zhang
- Key
Laboratory of Industrial Biotechnology, Ministry of Education, School
of Biotechnology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, P.
R. China
- . Tel: +86 510 85197760. Fax: +86 501 85918201
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17
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Isolation, purification, and structural identification of a new bacteriocin made by Lactobacillus plantarum found in conventional kombucha. Food Control 2020. [DOI: 10.1016/j.foodcont.2019.106923] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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18
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Xu M, Xue H, Li X, Zhao Y, Lin L, Yang L, Zheng G. Chemical composition, antibacterial properties, and mechanism of Smilax china L. polyphenols. Appl Microbiol Biotechnol 2019; 103:9013-9022. [DOI: 10.1007/s00253-019-10100-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 08/08/2019] [Accepted: 08/26/2019] [Indexed: 10/25/2022]
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19
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Pei J, Chen D, Jin W, Geng J, Wang W, Zhang S, Yue T, Zhang H. Structure and mode of action of a novel antibacterial peptide from the blood of Andrias davidianus. Lett Appl Microbiol 2019; 69:312-317. [PMID: 31529504 DOI: 10.1111/lam.13219] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 11/19/2018] [Accepted: 11/20/2018] [Indexed: 12/26/2022]
Abstract
Andrias davidianus is widely recognized in traditional medicine as a cure-all to treat a plethora of ailments. In a previous study, a novel antibacterial peptide named andricin B was isolated from A. davidianus blood. In this study, we investigated andricin B structure and its mode of action. Circular dichroism spectra suggested that andricin B adopts a random coil state in aqueous solution and a more rigid conformation in the presence of bacteria. Moreover propidium iodide/fluorescein diacetate double staining indicated that bacteria treated with andricin B were not immediately eliminated. Rather, there is a gradual bacterial death, followed by a sublethal stage. Scanning electronic microscope imaging indicates that andricin B might form pores on cell membranes, leading to the release of cytoplasmic contents. These results were consistent with flow cytometry analysis. Furthermore, Fourier transform infrared spectroscopy suggests that andricin B induces changes in the chemical properties in the areas surrounding these "pores" on the cell membranes. SIGNIFICANCE AND IMPACT OF THE STUDY: The results of this study suggested the new perspectives about the mode of action of antimicrobial peptide (AMP) active against sensitive bacteria. The AMP was able to be in a random coiled state in aqueous solution but to change to a more rigid one in the presence of sensitive bacteria. Exposure to AMP might not lead to immediate death of treated bacteria, rather bacteria concentration decreased gradually flattening at a sublethal stage. These findings will help people to understand better how the AMPs activate against sensitive bacteria.
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Affiliation(s)
- J Pei
- Shaanxi Key Laboratory of Biology and Bioresources, College of Bioscience and Bioengineering, Shaanxi University of Technology, Hanzhong, Shaanxi, China
| | - D Chen
- Shaanxi Key Laboratory of Biology and Bioresources, College of Bioscience and Bioengineering, Shaanxi University of Technology, Hanzhong, Shaanxi, China
| | - W Jin
- Shaanxi Key Laboratory of Biology and Bioresources, College of Bioscience and Bioengineering, Shaanxi University of Technology, Hanzhong, Shaanxi, China
| | - J Geng
- Shaanxi Key Laboratory of Biology and Bioresources, College of Bioscience and Bioengineering, Shaanxi University of Technology, Hanzhong, Shaanxi, China
| | - W Wang
- Shaanxi Key Laboratory of Biology and Bioresources, College of Bioscience and Bioengineering, Shaanxi University of Technology, Hanzhong, Shaanxi, China
| | - S Zhang
- Shaanxi Key Laboratory of Biology and Bioresources, College of Bioscience and Bioengineering, Shaanxi University of Technology, Hanzhong, Shaanxi, China
| | - T Yue
- College of Food Science, Northwest University, Xi'an, Shaanxi, China
| | - H Zhang
- College of Food Science, Qilu University of Technology, Shandong, China
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20
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Li T, Liu Q, Wang D, Li J. Characterization and antimicrobial mechanism of CF-14, a new antimicrobial peptide from the epidermal mucus of catfish. FISH & SHELLFISH IMMUNOLOGY 2019; 92:881-888. [PMID: 31291603 DOI: 10.1016/j.fsi.2019.07.015] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 06/28/2019] [Accepted: 07/05/2019] [Indexed: 06/09/2023]
Abstract
In this study, we identified a novel antibacterial peptide, RIVELTLPRVSVRL-NH2 (named CF-14), derived from the epidermal mucus of catfish and characterized its antimicrobial activity. Analysis of antimicrobial activity and hemolytic activity of CF-14 revealed broad spectrum, high levels of antimicrobial activity and low toxicity to eukaryotic cells. CF-14 remained stable at pH values ranging from 4.0 to 12.0 and remained bioactive when exposed to high temperature. CD analysis indicated that CF-14 forms a random coil in PBS buffer and an α-helical conformation in the membrane-mimetic 2.5% SDS micelle. Additionally, the antibacterial mechanism of CF-14 against Shewanella putrefaciens was investigated. Membrane permeability experiments confirmed that CF-14 could increase cell wall membrane permeability and cause nucleotide leakage. Moreover, observations performed using scanning electron and confocal microscopy indicated that CF-14 could penetrate into the cell membranes of S. putrefaciens and accumulate in bacterial cells, but did not break down cell membranes. Further, electrophoresis analysis demonstrated that CF-14 possesses DNA-binding affinity. The results provide a substantial basis for future application of CF-14, a novel cell-penetrating peptide (CPP) derived from catfish.
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Affiliation(s)
- Tingting Li
- Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University), Ministry of Education, Dalian Liaoning, 116029, China.
| | - Quanwei Liu
- College of Food Science and Technology, Bohai University, National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products, JinzhouLiaoning, 121013, China.
| | - Dangfeng Wang
- College of Food Science and Technology, Bohai University, National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products, JinzhouLiaoning, 121013, China.
| | - Jianrong Li
- College of Food Science and Technology, Bohai University, National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products, JinzhouLiaoning, 121013, China.
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21
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Li M, Wang S, Xu J, Xu S, Liu H. pH/Redox-Controlled Interaction between Lipid Membranes and Peptide Derivatives with a "Helmet". J Phys Chem B 2019; 123:6784-6791. [PMID: 31306021 DOI: 10.1021/acs.jpcb.9b05367] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
How to reduce the cytotoxicity of antitumor peptides to normal cells remains an ongoing challenge. Here, we designed a pH/redox-responsive supramolecular structure (Pep-V⊂P-PEG) composed of a peptide modified with viologen (Pep-V) and polyethylene glycol bearing pillar[5]arene (P-PEG) as a "helmet". By shielding the hydrophobic moiety of the peptide derivative with pillar[5]arene via host-guest interactions, its disruption on normal cells can be effectively reduced. At acidic pH, the supramolecular structure can selectively adsorb onto negatively charged lipid membranes because of electrostatic interactions. Owing to redox responsiveness of the viologen group, Pep-V could be separated from P-PEG after the addition of reductants and inserted into lipid bilayers, which leads to membrane disruption. Cargo leakage of liposome models was investigated to understand Pep-V⊂P-PEG-induced liposomal membrane disruption under different pH values and redox conditions. Results showed that Pep-V⊂P-PEG caused almost no cargo leakage from (1,2-dipalmitoyl-sn-glycerol-3-phosphocholine) liposomes at pH 7.4 but significant leakage from negatively charged (1,2-dipalmitoyl-sn-glycerol-3-phospho-(1-rac-glyerol)) liposomes at pH 5.0 under a reducing environment. Pep-V⊂P-PEG displayed low destructive effects on mimic normal cells and significant disruption to mimic tumor cells when exposed to a reducing environment that is expected to be a potential antitumor agent.
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Affiliation(s)
- Mengya Li
- Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering , East China University of Science and Technology , Shanghai 200237 , PR China
| | - Sijia Wang
- College of Pharmacy , Henan University of Chinese Medicine , Zhengzhou 450046 , PR China
| | - Jun Xu
- Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering , East China University of Science and Technology , Shanghai 200237 , PR China
| | - Shouhong Xu
- Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering , East China University of Science and Technology , Shanghai 200237 , PR China
| | - Honglai Liu
- Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering , East China University of Science and Technology , Shanghai 200237 , PR China
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22
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Hou X, Feng C, Li S, Luo Q, Shen G, Wu H, Li M, Liu X, Chen A, Ye M, Zhang Z. Mechanism of antimicrobial peptide NP-6 from Sichuan pepper seeds against E. coli and effects of different environmental factors on its activity. Appl Microbiol Biotechnol 2019; 103:6593-6604. [PMID: 31286166 DOI: 10.1007/s00253-019-09981-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 05/26/2019] [Accepted: 06/11/2019] [Indexed: 12/22/2022]
Abstract
A novel antimicrobial peptide named NP-6 was identified in our previous work. Here, the mechanisms of the peptide against Escherichia coli (E. coli) were further investigated, as well as the peptide's resistance to temperature, pH, salinity, and enzymes. The transmission electron microscopy (TEM), confocal laser scanning microcopy (CLSM), and flow cytometric (FCM) analysis, combined with measurement of released K+, were performed to evaluate the effect of NP-6 E. coli cell membrane. The influence of NP-6 on bacterial DNA/RNA and enzyme was also investigated. The leakage of K+ demonstrated that NP-6 could increase the permeability of E. coli cell membrane. The ATP leakage, FCM, and CLSM assays suggested that NP-6 caused the disintegration of bacterial cell membrane. The TEM observation indicated that NP-6 could cause the formation of empty cells and debris. Besides, the DNA-binding assay indicated that NP-6 could bind with bacterial genomic DNA in a way that ethidium bromide (EB) did, and suppress the migration of DNA/RNA in gel retardation. Additionally, NP-6 could also affect the activity of β-galactosidase. Finally, the effect of different surroundings such as heating, pH, ions, and protease on the antimicrobial activity of NP-6 against E. coli was also investigated. Results showed that the peptide was heat stable in the range of 60~100 °C and performed well at pH 6.0~8.0. However, the antimicrobial activity of NP-6 decreased significantly in the presence of Mg2+/Ca2+, and after incubation with trypsin/proteinase K. The results will provide a theoretical support in the further application of NP-6.
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Affiliation(s)
- Xiaoyan Hou
- College of Food Science, Sichuan Agricultural University, Ya'an, 625014, Sichuan, China
| | - Chaoyang Feng
- College of Food Science, Sichuan Agricultural University, Ya'an, 625014, Sichuan, China
| | - Shanshan Li
- College of Food Science, Sichuan Agricultural University, Ya'an, 625014, Sichuan, China
| | - Qingying Luo
- College of Food Science, Sichuan Agricultural University, Ya'an, 625014, Sichuan, China
| | - Guanghui Shen
- College of Food Science, Sichuan Agricultural University, Ya'an, 625014, Sichuan, China
| | - Hejun Wu
- College of Food Science, Sichuan Agricultural University, Ya'an, 625014, Sichuan, China
| | - Meiliang Li
- College of Food Science, Sichuan Agricultural University, Ya'an, 625014, Sichuan, China
| | - Xingyan Liu
- College of Food Science, Sichuan Agricultural University, Ya'an, 625014, Sichuan, China
| | - Anjun Chen
- College of Food Science, Sichuan Agricultural University, Ya'an, 625014, Sichuan, China
| | - Meng Ye
- College of Forestry, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Zhiqing Zhang
- College of Food Science, Sichuan Agricultural University, Ya'an, 625014, Sichuan, China.
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23
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Wang L, Sun J, Ding S, Qi B. Isolation and identification of novel antioxidant and antimicrobial oligopeptides from enzymatically hydrolyzed anchovy fish meal. Process Biochem 2018. [DOI: 10.1016/j.procbio.2018.08.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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24
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Pu C, Tang W. The antibacterial and antibiofilm efficacies of a liposomal peptide originating from rice bran protein against Listeria monocytogenes. Food Funct 2018; 8:4159-4169. [PMID: 29022979 DOI: 10.1039/c7fo00994a] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
With the aim of exploring a natural antilisterial peptide from food-derived origin, an antibacterial peptide named as Alpep7 was purified from the bromelain hydrolysate of rice bran protein (RBP) in this study. The resulting amino acid consequence was identified as KVDHFPL (Lys-Val-Asp-His-Phe-Pro-Leu) by ultraperformance liquid chromatography tandem matrix-assisted laser desorption/ionisation quadrupole time-of-flight mass spectrometry (MALDI Q-TOF MS). In addition, to assess the probability of the targeted delivery of liposome encapsulation of the peptide to Listeria biofilm, Alpep7-loaded liposomes were further prepared from a mixture of dipalmitoylphosphatidylcholine, stearylamine and cholesterol in a molar ratio of 10 : 3 : 2 and characterised by the analysis of particle size, zeta potential, microtopography and storage stability. The results showed that the liposomes exhibited a well-defined spherical shape, with an average diameter below 200 nm. The liposomes maintained favourable stability after storage at 4 °C for 4 weeks. Comparisons between the activities of free and liposomal Alpep7 via microbroth dilution, regrowth analysis and confocal scanning laser microscopy suggested that liposomal delivery was more effective during the initial exposure of the liposomes to the biofilms. The thermodynamic analysis indicated that the adsorption of liposomal Alpep7 to the listerial biofilm was a spontaneous, exothermic process. The results may provide a natural means for the treatment of listerial contamination and guide the potential application of liposomes for the targeted delivery of antimicrobials to pathogenic biofilms in the food industry.
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Affiliation(s)
- Chuanfen Pu
- School of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China.
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25
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Pu C, Tang W. A chitosan-coated liposome encapsulating antibacterial peptide, Apep10: characterisation, triggered-release effects and antilisterial activity in thaw water of frozen chicken. Food Funct 2018; 7:4310-4322. [PMID: 27713959 DOI: 10.1039/c6fo00858e] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Contamination of Listeria monocytogenes in food and their processing environment is a focus of attention in the food industry. To achieve the controlled release of antibacterial agents to a food processing environment contaminated by L. monocytogenes, chitosan-stabilised liposomes encapsulating Apep10 (GLARCLAGTL), an antibacterial peptide derived from boiled-dried anchovies, were prepared by utilising listeria toxins to activate the peptide release. Characteristics including the particle size, polydispersity index (PDI), encapsulation efficiency (EE), and morphology of the chitosan-coated Apep10 liposomes were investigated. The chitosan liposomes were more stable than their uncoated counterparts, which indicated that the coating of chitosan on the surface of the liposomes inhibited undesirable vesicle fusion and payload release during storage. However, once the chitosan-stabilised liposomes encountered L. monocytogenes, which secretes pore-forming toxins, the encapsulated antibacterial peptide was released and it exerted antimicrobial effects on the strain. The results of time-kill inhibition, scanning electron microscopy (SEM), crystal violet staining and confocal laser scanning microscopy (CLSM) images demonstrated that these liposomes have favourable antibacterial and anti-biofilm activities against L. monocytogenes in the thaw water of frozen chicken. This bacterial toxin-enabled release of the encapsulated antibacterial peptide from chitosan-coated liposomes provides an effective approach for the control of listerial contamination. This technique can be broadly applied to treat contamination by a variety of pathogens that secrete pore-forming toxins.
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Affiliation(s)
- Chuanfen Pu
- School of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China.
| | - Wenting Tang
- School of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China.
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26
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Purification and characterization of plantaricin SLG1, a novel bacteriocin produced by Lb. plantarum isolated from yak cheese. Food Control 2018. [DOI: 10.1016/j.foodcont.2017.07.034] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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27
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Pei J, Feng Z, Ren T, Sun H, Han H, Jin W, Dang J, Tao Y. Purification, characterization and application of a novel antimicrobial peptide from Andrias davidianus
blood. Lett Appl Microbiol 2017; 66:38-43. [DOI: 10.1111/lam.12823] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 10/09/2017] [Accepted: 10/11/2017] [Indexed: 11/26/2022]
Affiliation(s)
- J. Pei
- Shaanxi Key Laboratory of Biology and Bioresources; Shaanxi University of Technology; Shaanxi China
- Qinghai Key Laboratory of Tibetan Medicine Research; Northwest Institute of Plateau Biology; Chinese Academy of Sciences; Xining China
| | - Z. Feng
- Shaanxi Key Laboratory of Biology and Bioresources; Shaanxi University of Technology; Shaanxi China
| | - T. Ren
- Shaanxi Key Laboratory of Biology and Bioresources; Shaanxi University of Technology; Shaanxi China
| | - H. Sun
- Shaanxi Key Laboratory of Biology and Bioresources; Shaanxi University of Technology; Shaanxi China
| | - H. Han
- Shaanxi Key Laboratory of Biology and Bioresources; Shaanxi University of Technology; Shaanxi China
| | - W. Jin
- Shaanxi Key Laboratory of Biology and Bioresources; Shaanxi University of Technology; Shaanxi China
| | - J. Dang
- Qinghai Key Laboratory of Tibetan Medicine Research; Northwest Institute of Plateau Biology; Chinese Academy of Sciences; Xining China
| | - Y. Tao
- Qinghai Key Laboratory of Tibetan Medicine Research; Northwest Institute of Plateau Biology; Chinese Academy of Sciences; Xining China
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28
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Pei J, Jiang H, Li X, Jin W, Tao Y. Antimicrobial peptides sourced from post-butter processing waste yak milk protein hydrolysates. AMB Express 2017; 7:217. [PMID: 29210028 PMCID: PMC5716961 DOI: 10.1186/s13568-017-0497-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Accepted: 10/26/2017] [Indexed: 01/08/2023] Open
Abstract
Yak butter is one of the most important foods for the Tibetan people. Of note, its production yields waste yak milk as a by-product. In this work, waste yak milk protein hydrolysates made via Pepsin hydrolysis were shown to have antimicrobial activity. Furthermore, an innovative method of magnetic liposome adsorption combined with reversed-phase high performance liquid chromatography (RP-HPLC) was developed to screen for and purify the antimicrobial peptides. Two antimicrobial peptides were obtained and their amino acid sequences were determined by N-sequencing, namely Arg-Val-Met-Phe-Lys-Trp-Ala and Lys-Val-Ile-Ser-Met-Ile. The antimicrobial activity spectra of Arg-Val-Met-Phe-Lys-Trp-Ala included Bacillus subtilis, Staphylcoccus aureus, Listeria innocua, Escherichia coli, Enterobacter cloacae and Salmonella paratyphi, while the Lys-Val-Ile-Ser-Met-Ile peptide shows not only bacterial growth inhibition but also of fungi. Haemolytic testing suggested that these two antimicrobial peptides could be considered to have no haemolytic effect at their minimum inhibitory concentrations (MICs).
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29
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Pei J, Feng Z, Ren T, Jin W, Li X, Chen D, Tao Y, Dang J. Selectively screen the antibacterial peptide from the hydrolysates of highland barley. Eng Life Sci 2017; 18:48-54. [PMID: 32624860 DOI: 10.1002/elsc.201700118] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 09/17/2017] [Accepted: 09/25/2017] [Indexed: 12/20/2022] Open
Abstract
Highland barley is one of the most important industrial crops in Tibetan plateau. Previous research indicated that highland barley has many medical functions. In this work, the antibacterial abilities of highland barley were investigated. The protein solutions hydrolyzed by trypsin for 4 h exhibited the highest antibacterial activity. An antibacterial peptide, barleycin, was screened and purified by magnetic liposome extraction combining with the protein profiles of reversed-phase high-performance liquid chromatography (RP-HPLC). Structure, characterization, and safety evaluation of barleycin were further investigated. Amino acids sequence was determined as Lys-Ile-Ile-Ile-Pro-Pro-Leu-Phe-His by N-sequencing. Circular dichroism spectra indicated the a-helix conformation of barleycin. The activity spectrum included Bacillus subtilis, Staphylcoccus aureus, Listeria innocua and Escherichia coli and the MICs were from 4 to 16 μg/mL. Safety evaluations with cytotoxicity and hemolytic suggested this antibacterial peptide could be considered as safe at MICs. Finally, mode of action of barleycin on sensitive cells was primarily studied. The results suggested the damage of cell membrane.
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Affiliation(s)
- Jinjin Pei
- Shaanxi Key Laboratory of Biology and Bioresources Shaanxi University of Technology Hanzhogn Shaanxi P. R. China.,Key laboratory of Tibetan Medicine Research, Northwest Institute of Plateau Biology Chinese Academy of Sciences Xining P. R. China.,Qinghai Key Laboratory of Tibetan Medicine Research Xining P. R. China
| | - Zhenzhen Feng
- Shaanxi Key Laboratory of Biology and Bioresources Shaanxi University of Technology Hanzhogn Shaanxi P. R. China
| | - Ting Ren
- Shaanxi Key Laboratory of Biology and Bioresources Shaanxi University of Technology Hanzhogn Shaanxi P. R. China
| | - Wengang Jin
- Shaanxi Key Laboratory of Biology and Bioresources Shaanxi University of Technology Hanzhogn Shaanxi P. R. China
| | - Xinsheng Li
- Shaanxi Key Laboratory of Biology and Bioresources Shaanxi University of Technology Hanzhogn Shaanxi P. R. China
| | - Dejing Chen
- Shaanxi Key Laboratory of Biology and Bioresources Shaanxi University of Technology Hanzhogn Shaanxi P. R. China
| | - Yanduo Tao
- Key laboratory of Tibetan Medicine Research, Northwest Institute of Plateau Biology Chinese Academy of Sciences Xining P. R. China.,Qinghai Key Laboratory of Tibetan Medicine Research Xining P. R. China
| | - Jun Dang
- Key laboratory of Tibetan Medicine Research, Northwest Institute of Plateau Biology Chinese Academy of Sciences Xining P. R. China.,Qinghai Key Laboratory of Tibetan Medicine Research Xining P. R. China
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Cheng AC, Lin HL, Shiu YL, Tyan YC, Liu CH. Isolation and characterization of antimicrobial peptides derived from Bacillus subtilis E20-fermented soybean meal and its use for preventing Vibrio infection in shrimp aquaculture. FISH & SHELLFISH IMMUNOLOGY 2017; 67:270-279. [PMID: 28602685 DOI: 10.1016/j.fsi.2017.06.006] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 05/23/2017] [Accepted: 06/03/2017] [Indexed: 05/25/2023]
Abstract
Bacillus subtilis E20-fermented soybean meal (FSBM) was found to produce antimicrobial peptides (AMPs) with great antimicrobial activity against Vibrio alginolyticus (VA) and V. parahaemolyticus (VP). Three AMPs were purified with a 5 kDa ultrafiltration, Sephadex G-15 column and reverse-phase high-performance liquid chromatography (RP-HPLC). The FSB-AMP, HTSKALLDMLKRLGK, identified by an RP-nano-ultrapure liquid chromatography (UPLC) electrospray ionization (ESI)-tandem mass spectroscopic (MS/MS) analysis exhibited the highest bactericidal activity against VA and VP compared to the others. The antimicrobial activity assessment indicated that FSB-AMP inhibited the growth of VA and VP with minimal inhibitory concentrations of 72.5 and 72.5 μM. Alterations in the morphology of VA were observed by scanning electronic microscopy, and membrane disruption of VA and VP was confirmed by fluorescent microscopy with propidium iodide staining. The FSB-AMP was then incorporated into the diet of white shrimp, Litopenaeus vannamei, and a protective effect in shrimp against VP infection was recorded as well as for shrimp fed a diet containing 15% fish meal replaced by B. subtilis E20-FSBM. Results demonstrated that B. subtilis E20-FSBM could be a biofunctional ingredient to prevent vibriosis in shrimp aquaculture.
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Affiliation(s)
- Ann-Chang Cheng
- Department and Graduate Institute of Aquaculture, National Kaohsiung Marine University, 811, Taiwan
| | - Hsueh-Li Lin
- Department of Aquaculture, National Pingtung University of Science and Technology, Pingtung, 91201, Taiwan
| | - Ya-Li Shiu
- Department of Aquaculture, National Pingtung University of Science and Technology, Pingtung, 91201, Taiwan
| | - Yu-Chang Tyan
- Department of Medical Imaging and Radiological Sciences, Kaohsiung Medical University, Kaohsiung, 807, Taiwan
| | - Chun-Hung Liu
- Department of Aquaculture, National Pingtung University of Science and Technology, Pingtung, 91201, Taiwan.
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Pei J, Jiang L. Antimicrobial peptide from mucus of Andrias davidianus : screening and purification by magnetic cell membrane separation technique. Int J Antimicrob Agents 2017; 50:41-46. [DOI: 10.1016/j.ijantimicag.2017.02.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 01/25/2017] [Accepted: 02/10/2017] [Indexed: 10/19/2022]
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Pu C, Tang W. Affinity and selectivity of anchovy antibacterial peptide for Staphylococcus aureus cell membrane lipid and its application in whole milk. Food Control 2017. [DOI: 10.1016/j.foodcont.2016.08.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Tang W, Pu C, Li M. Interaction between Antibacterial Peptide Apep10 and Escherichia coli Membrane Lipids Evaluated Using Liposome as Pseudo-Stationary Phase. PLoS One 2017; 12:e0164594. [PMID: 28052090 PMCID: PMC5215004 DOI: 10.1371/journal.pone.0164594] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 09/27/2016] [Indexed: 11/18/2022] Open
Abstract
Liposomes constructed from Escherichia coli membrane lipids were used as a pseudo-stationary phase in capillary electrophoresis and immobilised liposome chromatography to evaluate the interaction between antibacterial peptide (ABP) Apep10 and bacterial membrane lipids. The peptide mobility decreased as the concentration of liposomes increased, providing evidence for the existence of this interaction. The binding constant between Apep10 and the Escherichia coli membranes lipid liposome was higher than that of Apep10 with a mixed phospholipids liposome at the same temperature. The capillary electrophoresis results indicate that the binding ability of Apep10 with a liposome was dependent on the liposome’s lipid compositions. Thermodynamic analysis by immobilised liposome chromatography indicated that hydrophobic and electrostatic effects contributed to the partitioning of Apep10 in the membrane lipids. The liposomes constructed from bacterial membrane lipid were more suitable as the model membranes used to study dynamic ABP/membrane interactions than those constructed from specific ratios of particular phospholipids, with its more biomimetic phospholipid composition and contents. This study provides an appropriate model for the evaluation of ABP-membrane interactions.
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Affiliation(s)
- Wenting Tang
- School of Food Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
- * E-mail:
| | - Chuanfen Pu
- School of Food Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
| | - Man Li
- School of Food Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
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Miao J, Liu G, Ke C, Fan W, Li C, Chen Y, Dixon W, Song M, Cao Y, Xiao H. Inhibitory effects of a novel antimicrobial peptide from kefir against Escherichia coli. Food Control 2016. [DOI: 10.1016/j.foodcont.2016.01.023] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Targeted separation of antibacterial peptide from protein hydrolysate of anchovy cooking wastewater by equilibrium dialysis. Food Chem 2015; 168:115-23. [DOI: 10.1016/j.foodchem.2014.07.027] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 06/07/2014] [Accepted: 07/06/2014] [Indexed: 12/25/2022]
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