401
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Analysis of phosphate and phosphate containing headgroups enzymatically cleaved from phospholipids of Bacillus subtilis by capillary electrophoresis. Anal Bioanal Chem 2015; 407:7215-20. [DOI: 10.1007/s00216-015-8885-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Revised: 06/19/2015] [Accepted: 06/26/2015] [Indexed: 01/20/2023]
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402
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Xu L, Chou S, Wang J, Shao C, Li W, Zhu X, Shan A. Antimicrobial activity and membrane-active mechanism of tryptophan zipper-like β-hairpin antimicrobial peptides. Amino Acids 2015; 47:2385-97. [PMID: 26088720 DOI: 10.1007/s00726-015-2029-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Accepted: 06/10/2015] [Indexed: 11/24/2022]
Abstract
Antimicrobial peptides (AMPs) with amphipathic β-hairpin structures have been demonstrated to possess potent antimicrobial activities and great cell selectivities. However, our understanding of β-hairpin antimicrobial peptides lags behind that of α-helices, mainly because it is difficult for short peptides to form robust β-hairpin structures. Tryptophan zipper (trpzip) peptides are among the most stable β-hairpin peptides known to fold spontaneously without requiring covalent disulfide constraint or metal binding. To develop model β-hairpin AMPs with small size and remarkable stability, a series of amphiphilic linear peptides were designed based on the trpzip motif. The sequence of designed peptides is (WK) n (D) PG(KW) n -NH2 (n = 1, 2, 3, 4, 5), and the antimicrobial activity and membrane interaction mechanism of the peptides were evaluated. The results showed that these peptides readily fold into β-hairpin structures in aqueous and membrane-mimicking environments and exhibit broad-spectrum antimicrobial activities against both gram-positive and gram-negative bacteria. The antibacterial potency of the peptides initially increased and then decreased with increasing chain length. WK3, a 14-residue peptide, displayed excellent antimicrobial activity with minimal hemolytic activity and cytotoxicity, suggesting that it possesses great cell selectivity. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), fluorescence spectroscopy, and flow cytometry indicated that representative peptides WK3 and WK4 exert their activities by permeabilizing the microbial membrane and damaging cell membrane integrity. This study reveals the application potential of the designed peptides as promising antimicrobial agents for the control of infectious diseases, and it also provides new insights into the design and optimization of highly stable β-hairpin AMPs with great antimicrobial activities and cell selectivities.
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Affiliation(s)
- Lin Xu
- Institute of Animal Nutrition, Northeast Agricultural University, 59 Mucai Street, Harbin, 150030, China.,Heilongjiang Polytechnic, 5 Xuefu Road, Harbin, 150080, China
| | - Shuli Chou
- Institute of Animal Nutrition, Northeast Agricultural University, 59 Mucai Street, Harbin, 150030, China
| | - Jiajun Wang
- Institute of Animal Nutrition, Northeast Agricultural University, 59 Mucai Street, Harbin, 150030, China
| | - Changxuan Shao
- Institute of Animal Nutrition, Northeast Agricultural University, 59 Mucai Street, Harbin, 150030, China
| | - Weizhong Li
- Institute of Animal Nutrition, Northeast Agricultural University, 59 Mucai Street, Harbin, 150030, China
| | - Xin Zhu
- Institute of Animal Nutrition, Northeast Agricultural University, 59 Mucai Street, Harbin, 150030, China
| | - Anshan Shan
- Institute of Animal Nutrition, Northeast Agricultural University, 59 Mucai Street, Harbin, 150030, China.
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403
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Abstract
Effective antivirals have been developed against specific viruses, such as HIV, Hepatitis C virus and influenza virus. This 'one bug-one drug' approach to antiviral drug development can be successful, but it may be inadequate for responding to an increasing diversity of viruses that cause significant diseases in humans. The majority of viral pathogens that cause emerging and re-emerging infectious diseases are membrane-enveloped viruses, which require the fusion of viral and cell membranes for virus entry. Therefore, antivirals that target the membrane fusion process represent new paradigms for broad-spectrum antiviral discovery. In this Review, we discuss the mechanisms responsible for the fusion between virus and cell membranes and explore how broad-spectrum antivirals target this process to prevent virus entry.
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Affiliation(s)
- Frederic Vigant
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, #1124, New York, New York 10029, USA
| | - Nuno C Santos
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Av. Prof. Egas Moniz, 1649-028 Lisbon, Portugal
| | - Benhur Lee
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, #1124, New York, New York 10029, USA
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404
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Escribá PV, Busquets X, Inokuchi JI, Balogh G, Török Z, Horváth I, Harwood JL, Vígh L. Membrane lipid therapy: Modulation of the cell membrane composition and structure as a molecular base for drug discovery and new disease treatment. Prog Lipid Res 2015; 59:38-53. [PMID: 25969421 DOI: 10.1016/j.plipres.2015.04.003] [Citation(s) in RCA: 166] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Revised: 04/10/2015] [Accepted: 04/29/2015] [Indexed: 01/17/2023]
Abstract
Nowadays we understand cell membranes not as a simple double lipid layer but as a collection of complex and dynamic protein-lipid structures and microdomains that serve as functional platforms for interacting signaling lipids and proteins. Membrane lipids and lipid structures participate directly as messengers or regulators of signal transduction. In addition, protein-lipid interactions participate in the localization of signaling protein partners to specific membrane microdomains. Thus, lipid alterations change cell signaling that are associated with a variety of diseases including cancer, obesity, neurodegenerative disorders, cardiovascular pathologies, etc. This article reviews the newly emerging field of membrane lipid therapy which involves the pharmacological regulation of membrane lipid composition and structure for the treatment of diseases. Membrane lipid therapy proposes the use of new molecules specifically designed to modify membrane lipid structures and microdomains as pharmaceutical disease-modifying agents by reversing the malfunction or altering the expression of disease-specific protein or lipid signal cascades. Here, we provide an in-depth analysis of this emerging field, especially its molecular bases and its relevance to the development of innovative therapeutic approaches.
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Affiliation(s)
- Pablo V Escribá
- Department of Biology, University of the Balearic Islands, E-07122 Palma de Mallorca, Spain
| | - Xavier Busquets
- Department of Biology, University of the Balearic Islands, E-07122 Palma de Mallorca, Spain
| | - Jin-ichi Inokuchi
- Division of Glycopathology, Institute of Molecular Biomembrane and Glycobiology, Tohoku Pharmaceutical University, Sendai, Japan
| | - Gábor Balogh
- Institute of Biochemistry, Biological Research Center, Hungarian Academy of Sciences, Szeged, Hungary
| | - Zsolt Török
- Institute of Biochemistry, Biological Research Center, Hungarian Academy of Sciences, Szeged, Hungary
| | - Ibolya Horváth
- Institute of Biochemistry, Biological Research Center, Hungarian Academy of Sciences, Szeged, Hungary
| | - John L Harwood
- School of Biosciences, Cardiff University, Cardiff CF10 3AX, Wales, UK.
| | - László Vígh
- Institute of Biochemistry, Biological Research Center, Hungarian Academy of Sciences, Szeged, Hungary.
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405
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Juba ML, Porter DK, Williams EH, Rodriguez CA, Barksdale SM, Bishop BM. Helical cationic antimicrobial peptide length and its impact on membrane disruption. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2015; 1848:1081-91. [DOI: 10.1016/j.bbamem.2015.01.007] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Revised: 12/31/2014] [Accepted: 01/11/2015] [Indexed: 11/25/2022]
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406
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Zhu X, Zhang L, Wang J, Ma Z, Xu W, Li J, Shan A. Characterization of antimicrobial activity and mechanisms of low amphipathic peptides with different α-helical propensity. Acta Biomater 2015; 18:155-67. [PMID: 25735802 DOI: 10.1016/j.actbio.2015.02.023] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Revised: 01/14/2015] [Accepted: 02/23/2015] [Indexed: 11/29/2022]
Abstract
Antimicrobial peptides (AMPs) serve as a defense mechanism within multicellular organisms and are attracting increasing attention because of their potential application in the treatment of multidrug-resistant infections. Amphipathicity has long been believed to be the most important consideration for the structural modification and design of both naturally occurring and synthetic AMPs. Previous studies indicated that disruptive amphipathicity formed by replacing the paired charged amino acid residues on the polar face of an amphipathic helix with tryptophan residues linked with hydrogen bonds on the basis of α-helical protein folding principles endowed the AMPs with increased cell selectivity. In an attempt to augment and hone this strategy further, we designed a series of imperfect amphipathic peptides by placing different types of amino acid residues at the hydrogen bond linked positions of α-helix structures to characterize their antimicrobial properties and mechanism of action. The d-Trp-substituted sequence (PRW4-d) showed greater antimicrobial potency than Cys-(C4), Asp-(D4), Ile-(I4), and Pro-(P4) substituted sequences, comparable to the l-Trp-substituted parent sequence (PRW4). Furthermore, the total replacement of Lys residues with Arg residues along the peptide sequence (PRW4-R) exhibited enhanced antimicrobial activity and cell selectivity. In addition, no cytotoxicity was observed among these synthetic peptides. PRW4-d and PRW4-R maintained their activities in the presence of physiological salts and human serum. The fluorescence spectroscopy, flow cytometry, and electron microscopy observations indicated that the optimized sequences exhibited excellent antimicrobial potency by inducing cytoplasmic membrane potential loss, membrane permeabilization and disruption. Collectively, the results could be useful for designing short AMPs with great antimicrobial activity and cell selectivity.
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Affiliation(s)
- Xin Zhu
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Licong Zhang
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Jue Wang
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Zhi Ma
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Wei Xu
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Jianping Li
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Anshan Shan
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China.
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407
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Jackman JA, Saravanan R, Zhang Y, Tabaei SR, Cho NJ. Correlation between Membrane Partitioning and Functional Activity in a Single Lipid Vesicle Assay Establishes Design Guidelines for Antiviral Peptides. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:2372-2379. [PMID: 25619175 DOI: 10.1002/smll.201403638] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Indexed: 06/04/2023]
Abstract
The nanometer-scale discrimination of virus-rupturing peptides is tested using lipid membrane platforms. In combination with single-vesicle analysis of peptide-induced vesicle rupture, a correlation between membrane partitioning and biologically relevant activities is established. Taken together, the findings support that the degree of rupture activity should be balanced by membrane curvature-selectivity for optimal therapeutic properties of antiviral peptides.
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Affiliation(s)
- Joshua A Jackman
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
- Centre for Biomimetic Sensor Science, Nanyang Technological University, 50 Nanyang Drive, 637553, Singapore
| | - Rathi Saravanan
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
- Centre for Biomimetic Sensor Science, Nanyang Technological University, 50 Nanyang Drive, 637553, Singapore
| | - Yibang Zhang
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
- Centre for Biomimetic Sensor Science, Nanyang Technological University, 50 Nanyang Drive, 637553, Singapore
| | - Seyed R Tabaei
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
- Centre for Biomimetic Sensor Science, Nanyang Technological University, 50 Nanyang Drive, 637553, Singapore
| | - Nam-Joon Cho
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
- Centre for Biomimetic Sensor Science, Nanyang Technological University, 50 Nanyang Drive, 637553, Singapore
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459, Singapore
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408
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Insights into the antimicrobial properties of hepcidins: advantages and drawbacks as potential therapeutic agents. Molecules 2015; 20:6319-41. [PMID: 25867823 PMCID: PMC6272296 DOI: 10.3390/molecules20046319] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Revised: 03/30/2015] [Accepted: 04/03/2015] [Indexed: 01/24/2023] Open
Abstract
The increasing frequency of multi-drug resistant microorganisms has driven research into alternative therapeutic strategies. In this respect, natural antimicrobial peptides (AMPs) hold much promise as candidates for the development of novel antibiotics. However, AMPs have some intrinsic drawbacks, such as partial degradation by host proteases or inhibition by host body fluid composition, potential toxicity, and high production costs. This review focuses on the hepcidins, which are peptides produced by the human liver with a known role in iron homeostasis, as well by numerous other organisms (including fish, reptiles, other mammals), and their potential as antibacterial and antifungal agents. Interestingly, the antimicrobial properties of human hepcidins are enhanced at acidic pH, rendering these peptides appealing for the design of new drugs targeting infections that occur in body areas with acidic physiological pH. This review not only considers current research on the direct killing activity of these peptides, but evaluates the potential application of these molecules as coating agents preventing biofilm formation and critically assesses technical obstacles preventing their therapeutic application.
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409
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Tang W, Yuan H, Zhang H, Wang L, Qian H, Qi X. An antimicrobial peptide screened from casein hydrolyzate by Saccharomyces cerevisiae cell membrane affinity method. Food Control 2015. [DOI: 10.1016/j.foodcont.2014.09.030] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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410
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Beddoes CM, Case CP, Briscoe WH. Understanding nanoparticle cellular entry: A physicochemical perspective. Adv Colloid Interface Sci 2015; 218:48-68. [PMID: 25708746 DOI: 10.1016/j.cis.2015.01.007] [Citation(s) in RCA: 220] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2014] [Revised: 01/21/2015] [Accepted: 01/22/2015] [Indexed: 12/21/2022]
Abstract
Understanding interactions between nanoparticles (NPs) with biological matter, particularly cells, is becoming increasingly important due to their growing application in medicine and materials, and consequent biological and environmental exposure. For NPs to be utilised to their full potential, it is important to correlate their functional characteristics with their physical properties, which may also be used to predict any adverse cellular responses. A key mechanism for NPs to impart toxicity is to gain cellular entry directly. Many parameters affect the behaviour of nanomaterials in a cellular environment particularly their interactions with cell membranes, including their size, shape and surface chemistry as well as factors such as the cell type, location and external environment (e.g. other surrounding materials, temperature, pH and pressure). Aside from in vitro and in vivo experiments, model cell membrane systems have been used in both computer simulations and physicochemical experiments to elucidate the mechanisms for NP cellular entry. Here we present a brief overview of the effects of NPs physical parameters on their cellular uptake, with focuses on 1) related research using model membrane systems and physicochemical methodologies; and 2) proposed physical mechanisms for NP cellular entrance, with implications to their nanotoxicity. We conclude with a suggestion that the energetic process of NP cellular entry can be evaluated by studying the effects of NPs on lipid mesophase transitions, as the molecular deformations and thus the elastic energy cost are analogous between such transitions and endocytosis. This presents an opportunity for contributions to understanding nanotoxicity from a physicochemical perspective.
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Affiliation(s)
- Charlotte M Beddoes
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK; Bristol Centre for Functional Nanomaterials, Centre for Nanoscience and Quantum Information, University of Bristol, UK
| | - C Patrick Case
- Musculoskeletal Research Unit, Clinical Science at North Bristol, University of Bristol, Avon Orthopaedic Centre, Southmead Hospital, Bristol BS10 5NB, UK
| | - Wuge H Briscoe
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK.
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411
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Taniguchi M, Ochiai A, Takahashi K, Nakamichi SI, Nomoto T, Saitoh E, Kato T, Tanaka T. Antimicrobial activity and mechanism of action of a novel cationic α-helical octadecapeptide derived from α-amylase of rice. Biopolymers 2015; 104:73-83. [DOI: 10.1002/bip.22605] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Revised: 12/04/2014] [Accepted: 12/20/2014] [Indexed: 01/26/2023]
Affiliation(s)
- Masayuki Taniguchi
- Department of Materials Science and Technology; Graduate School of Science and Technology, Niigata University; Niigata 950-2181 Japan
- Center for Transdisciplinary Research; Niigata University; Niigata 950-2181 Japan
| | - Akihito Ochiai
- Department of Materials Science and Technology; Graduate School of Science and Technology, Niigata University; Niigata 950-2181 Japan
| | - Kiyoshi Takahashi
- Department of Materials Science and Technology; Graduate School of Science and Technology, Niigata University; Niigata 950-2181 Japan
| | - Shun-ichi Nakamichi
- Department of Materials Science and Technology; Graduate School of Science and Technology, Niigata University; Niigata 950-2181 Japan
| | - Takafumi Nomoto
- Department of Materials Science and Technology; Graduate School of Science and Technology, Niigata University; Niigata 950-2181 Japan
| | - Eiichi Saitoh
- Graduate School of Technology, Niigata Institute of Technology; Niigata 945-1195 Japan
| | - Tetsuo Kato
- Department of Chemistry; Tokyo Dental College; Tokyo 101-0062 Japan
| | - Takaaki Tanaka
- Department of Materials Science and Technology; Graduate School of Science and Technology, Niigata University; Niigata 950-2181 Japan
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412
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Li Y, Yu J. Research Progress in Structure-Activity Relationship of Bioactive Peptides. J Med Food 2015; 18:147-56. [DOI: 10.1089/jmf.2014.0028] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Affiliation(s)
- Ying Li
- Department of Family and Consumer Sciences, North Carolina A&T State University, Greensboro, North Carolina, USA
- Institute of Agricultural Products Processing, Jiangsu Academy of Agricultural Science, Nanjing, Jiangsu, China
| | - Jianmei Yu
- Department of Family and Consumer Sciences, North Carolina A&T State University, Greensboro, North Carolina, USA
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413
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Derde M, Nau F, Guérin-Dubiard C, Lechevalier V, Paboeuf G, Jan S, Baron F, Gautier M, Vié V. Native and dry-heated lysozyme interactions with membrane lipid monolayers: Lipid packing modifications of a phospholipid mixture, model of the Escherichia coli cytoplasmic membrane. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2015; 1848:1065-73. [PMID: 25615689 DOI: 10.1016/j.bbamem.2015.01.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 01/05/2015] [Accepted: 01/11/2015] [Indexed: 11/17/2022]
Abstract
Antimicrobial resistance is currently an important public health issue. The need for innovative antimicrobials is therefore growing. The ideal antimicrobial compound should limit antimicrobial resistance. Antimicrobial peptides or proteins such as hen egg white lysozyme are promising molecules that act on bacterial membranes. Hen egg white lysozyme has recently been identified as active on Gram-negative bacteria due to disruption of the outer and cytoplasmic membrane integrity. Furthermore, dry-heating (7 days and 80 °C) improves the membrane activity of lysozyme, resulting in higher antimicrobial activity. These in vivo findings suggest interactions between lysozyme and membrane lipids. This is consistent with the findings of several other authors who have shown lysozyme interaction with bacterial phospholipids such as phosphatidylglycerol and cardiolipin. However, until now, the interaction between lysozyme and bacterial cytoplasmic phospholipids has been in need of clarification. This study proposes the use of monolayer models with a realistic bacterial phospholipid composition in physiological conditions. The lysozyme/phospholipid interactions have been studied by surface pressure measurements, ellipsometry and atomic force microscopy. Native lysozyme has proved able to absorb and insert into a bacterial phospholipid monolayer, resulting in lipid packing reorganization, which in turn has lead to lateral cohesion modifications between phospholipids. Dry-heating of lysozyme has increased insertion capacity and ability to induce lipid packing modifications. These in vitro findings are then consistent with the increased membrane disruption potential of dry heated lysozyme in vivo compared to native lysozyme. Moreover, an eggPC monolayer study suggested that lysozyme/phospholipid interactions are specific to bacterial cytoplasmic membranes.
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Affiliation(s)
- Melanie Derde
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France.
| | - Françoise Nau
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France
| | - Catherine Guérin-Dubiard
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France
| | - Valérie Lechevalier
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France
| | - Gilles Paboeuf
- Université de Rennes 1, Institut de physique de Rennes, UMR6251, CNRS, F-35042 Rennes, France
| | - Sophie Jan
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France
| | - Florence Baron
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France
| | - Michel Gautier
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France
| | - Véronique Vié
- Université de Rennes 1, Institut de physique de Rennes, UMR6251, CNRS, F-35042 Rennes, France
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414
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Baul U, Vemparala S. Membrane-Bound Conformations of Antimicrobial Agents and Their Modes of Action. ADVANCES IN PLANAR LIPID BILAYERS AND LIPOSOMES 2015. [DOI: 10.1016/bs.adplan.2015.06.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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415
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Wang X, Yang P, Mondiot F, Li Y, Miller DS, Chen Z, Abbott NL. Interfacial ordering of thermotropic liquid crystals triggered by the secondary structures of oligopeptides. Chem Commun (Camb) 2015; 51:16844-7. [DOI: 10.1039/c5cc06996c] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Ordering at phospholipid-decorated interfaces of liquid crystals is influenced by the secondary structure of oligopeptides.
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Affiliation(s)
- Xiaoguang Wang
- Department of Chemical and Biological Engineering
- University of Wisconsin-Madison
- Madison
- USA
| | - Pei Yang
- Department of Chemistry
- University of Michigan
- Ann Arbor
- USA
| | - Frederic Mondiot
- Department of Chemical and Biological Engineering
- University of Wisconsin-Madison
- Madison
- USA
| | - Yaoxin Li
- Department of Chemistry
- University of Michigan
- Ann Arbor
- USA
| | - Daniel S. Miller
- Department of Chemical and Biological Engineering
- University of Wisconsin-Madison
- Madison
- USA
| | - Zhan Chen
- Department of Chemistry
- University of Michigan
- Ann Arbor
- USA
| | - Nicholas L. Abbott
- Department of Chemical and Biological Engineering
- University of Wisconsin-Madison
- Madison
- USA
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416
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Han E, Lee H. Synergistic effects of magainin 2 and PGLa on their heterodimer formation, aggregation, and insertion into the bilayer. RSC Adv 2015. [DOI: 10.1039/c4ra08480b] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We performed coarse-grained molecular dynamics simulations of antimicrobial peptides PGLa and magainin 2 in lipid bilayers.
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Affiliation(s)
- Eol Han
- Department of Chemical Engineering
- Dankook University
- Yongin
- South Korea
| | - Hwankyu Lee
- Department of Chemical Engineering
- Dankook University
- Yongin
- South Korea
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417
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Keyzer H, Fey SJ, Thornton B, Kristiansen JE. Molar ratios of therapeutic water-soluble phenothiazine·water-insoluble phospholipid adducts reveal a Fibonacci correlation and a putative link for structure–activity relationships. RSC Adv 2015. [DOI: 10.1039/c4ra16551a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The fact that non-antibiotics can sensitise microorganisms for antibiotic treatment suggests that these molecules have valuable potential to treat multiple drug resistance.
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Affiliation(s)
- Hendrik Keyzer
- Department of Chemistry and Biochemistry
- California State University
- Los Angeles
- USA
| | - Stephen J. Fey
- Department of Biochemistry and Molecular Biology
- University of Southern Denmark
- DK-5230 Odense
- Denmark
| | - Barry Thornton
- University of Technology
- School of Mathematical Sciences
- School of Physics
- University of Sydney
- Sydney
| | - Jette E. Kristiansen
- MEMPHYS
- Department for Physics
- Chemistry and Pharmacy
- University of Southern Denmark
- DK-5230 Odense
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418
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Patra M, Wenzel M, Prochnow P, Pierroz V, Gasser G, Bandow JE, Metzler-Nolte N. An organometallic structure-activity relationship study reveals the essential role of a Re(CO) 3 moiety in the activity against gram-positive pathogens including MRSA. Chem Sci 2015; 6:214-224. [PMID: 28553471 PMCID: PMC5433042 DOI: 10.1039/c4sc02709d] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Accepted: 09/24/2014] [Indexed: 01/30/2023] Open
Abstract
The worrying appearance of microbial resistance to antibiotics is a worldwide problem which needs to be tackled urgently. Microbial resistance to the common classes of antibiotics involving purely organic compounds unfortunately develops very rapidly and in most cases, resistance was detected soon after or even before release of the antibiotic to the market. Therefore, novel concepts for antibiotics must be investigated, and metal-containing compounds hold particular promise in that area. Taking a trimetallic complex (1a) which contains a ferrocenyl (Fc), a CpMn(CO)3 (cymantrene) and a [(dpa)Re(CO)3] residue as the lead structure, a systematic structure-activity relationship (SAR) study against various gram-positive pathogenic bacteria including methicillin-resistant Staphylococcus aureus (MRSA) strains was performed. The [(dpa)Re(CO)3] moiety was discovered to be the essential unit for the observed antibacterial activity of 1a. The ferrocenyl and CpMn(CO)3 units can be replaced one by one or both together by organic moieties such as a phenyl ring without loss of antibacterial activity. The most potent mono-metallic complex (9c') has an antibacterial activity comparable to the well-established organic drugs amoxicillin and norfloxacin and importantly, only moderate cytotoxicity against mammalian cells. Microbiological studies on membrane potential, membrane permeabilization, and cell wall integrity revealed that 9c' targets the bacterial membrane and disturbs cell wall integrity, but shows more efficient membrane permeabilization than the lead structure 1a.
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Affiliation(s)
- Malay Patra
- Lehrstuhl für Anorganische Chemie I - Bioanorganische Chemie , Fakultät für Chemie und Biochemie , Ruhr-Universität Bochum , Universitätsstrasse 150 , D-44801 Bochum , Germany .
| | - Michaela Wenzel
- Ruhr-Universität Bochum , Biologie der Mikroorganismen , Arbeitsgruppe Mikrobielle Antibiotikaforschung , Universitätsstrasse 150 , D-44801 Bochum , Germany . ; ; Tel: +49-234-32-23102
| | - Pascal Prochnow
- Ruhr-Universität Bochum , Biologie der Mikroorganismen , Arbeitsgruppe Mikrobielle Antibiotikaforschung , Universitätsstrasse 150 , D-44801 Bochum , Germany . ; ; Tel: +49-234-32-23102
| | - Vanessa Pierroz
- Department of Chemistry , University of Zurich , Winterthurerstrasse 190 , CH-8057 Zurich , Switzerland
| | - Gilles Gasser
- Department of Chemistry , University of Zurich , Winterthurerstrasse 190 , CH-8057 Zurich , Switzerland
| | - Julia E Bandow
- Ruhr-Universität Bochum , Biologie der Mikroorganismen , Arbeitsgruppe Mikrobielle Antibiotikaforschung , Universitätsstrasse 150 , D-44801 Bochum , Germany . ; ; Tel: +49-234-32-23102
| | - Nils Metzler-Nolte
- Lehrstuhl für Anorganische Chemie I - Bioanorganische Chemie , Fakultät für Chemie und Biochemie , Ruhr-Universität Bochum , Universitätsstrasse 150 , D-44801 Bochum , Germany .
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419
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Smetanin M, Sek S, Maran F, Lipkowski J. Molecular resolution visualization of a pore formed by trichogin, an antimicrobial peptide, in a phospholipid matrix. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2014; 1838:3130-6. [DOI: 10.1016/j.bbamem.2014.08.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Revised: 08/05/2014] [Accepted: 08/07/2014] [Indexed: 11/16/2022]
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420
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Shin SH, Kim B, Park S, Jo S, Lee IH. Haloganan: a novel antimicrobial peptide for treatmentof wound infections. Peptides 2014; 62:137-43. [PMID: 25445605 DOI: 10.1016/j.peptides.2014.09.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Revised: 09/23/2014] [Accepted: 09/23/2014] [Indexed: 11/29/2022]
Abstract
HG1 is a Leu-rich antimicrobial peptide (AMP). Previously, the peptide was shown to lose its activity in human serum although it possessed potent and broad spectrum antimicrobial activity against a wide range of pathogenic microbes. In an attempt to design an HG1 isomer that can overcome the problem of HG1, a structure–activity relationship study was conducted by substitution of each of five Leu residues with a Gln residue. Each substitute was tested for its antimicrobial activity against methicillin-resistant Staphylococcus aureus (MRSA) or Candida strains. In addition, the antimicrobial activity of HG1 isomers was examined in the presence of glycosaminoglycans or lipid components occurring in the extracellular matrix, human serum and wound fluid. As a result, it was determined that the third residue (Leu) in the sequence of HG1 was mainly responsible for abrogation of its antimicrobial activity in human serum or wound fluid. An HG1 isomer (L3Q) with a Gln-3 substitution exhibited a potent antibacterial activity in 50% human serum. While the anti-MRSA activity of L3Q was equivalent to that of HG1, its anti-Candida activity was found to be substantially reduced. In order to improve anti-Candida activity of L3Q, its cationicity was enhanced by replacement of the C-terminal Ala-19 with a Lys residue. Overall, an HG1 isomer with two substitutions of Gln-3 and Lys-19, named haloganan, was verified to have an advantage over HG1 in that it exerted its potent antimicrobial activity under conditions containing human serum and/or wound fluid.
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421
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Alkotaini B, Anuar N, Kadhum AAH. Evaluation of morphological changes of Staphylococcus aureus and Escherichia coli induced with the antimicrobial peptide AN5-1. Appl Biochem Biotechnol 2014; 175:1868-78. [PMID: 25427593 DOI: 10.1007/s12010-014-1410-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Accepted: 11/14/2014] [Indexed: 11/30/2022]
Abstract
The mechanisms of action of AN5-1 against Gram-negative and Gram-positive bacteria were investigated by evaluations of the intracellular content leakage and by microscopic observations of the treated cells. Escherichia coli and Staphylococcus aureus were used for this investigation. Measurements of DNA, RNA, proteins, and β-galactosidase were taken, and the results showed a significant increase in the cultivation media after treatment with AN5-1 compared with the untreated cells. The morphological changes of treated cells were shown using transmission electron microscopy (TEM) and atomic force microscopy (AFM). The observations showed that AN5-1 acts against E. coli and against S. aureus in similar ways, by targeting the cell wall, causing disruptions; at a high concentration (80 AU/ml), these disruptions led to cell lysis. The 3D AFM imaging system showed that at a low concentration of 20 AU/ml, the effect of AN5-1 is restricted to pore formation only. Moreover, a separation between the cell wall and the cytoplasm was observed when Gram-negative bacteria were treated with a low concentration (20 AU/ml) of AN5-1.
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Affiliation(s)
- Bassam Alkotaini
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor, Malaysia,
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422
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Róg T, Vattulainen I. Cholesterol, sphingolipids, and glycolipids: what do we know about their role in raft-like membranes? Chem Phys Lipids 2014; 184:82-104. [PMID: 25444976 DOI: 10.1016/j.chemphyslip.2014.10.004] [Citation(s) in RCA: 140] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2014] [Revised: 10/24/2014] [Accepted: 10/25/2014] [Indexed: 12/14/2022]
Abstract
Lipids rafts are considered to be functional nanoscale membrane domains enriched in cholesterol and sphingolipids, characteristic in particular of the external leaflet of cell membranes. Lipids, together with membrane-associated proteins, are therefore considered to form nanoscale units with potential specific functions. Although the understanding of the structure of rafts in living cells is quite limited, the possible functions of rafts are widely discussed in the literature, highlighting their importance in cellular functions. In this review, we discuss the understanding of rafts that has emerged based on recent atomistic and coarse-grained molecular dynamics simulation studies on the key lipid raft components, which include cholesterol, sphingolipids, glycolipids, and the proteins interacting with these classes of lipids. The simulation results are compared to experiments when possible.
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Affiliation(s)
- Tomasz Róg
- Department of Physics, Tampere University of Technology, Tampere, Finland
| | - Ilpo Vattulainen
- Department of Physics, Tampere University of Technology, Tampere, Finland; MEMPHYS-Center for Biomembrane Physics, University of Southern Denmark, Odense, Denmark.
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423
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Goyal RK, Mattoo AK. Multitasking antimicrobial peptides in plant development and host defense against biotic/abiotic stress. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2014; 228:135-49. [PMID: 25438794 DOI: 10.1016/j.plantsci.2014.05.012] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Revised: 05/12/2014] [Accepted: 05/15/2014] [Indexed: 05/20/2023]
Abstract
Crop losses due to pathogens are a major threat to global food security. Plants employ a multilayer defense against a pathogen including the use of physical barriers (cell wall), induction of hypersensitive defense response (HR), resistance (R) proteins, and synthesis of antimicrobial peptides (AMPs). Unlike a complex R gene-mediated immunity, AMPs directly target diverse microbial pathogens. Many a times, R-mediated immunity breaks down and plant defense is compromised. Although R-gene dependent pathogen resistance has been well studied, comparatively little is known about the interactions of AMPs with host defense and physiology. AMPs are ubiquitous, low molecular weight peptides that display broad spectrum resistance against bacteria, fungi and viruses. In plants, AMPs are mainly classified into cyclotides, defensins, thionins, lipid transfer proteins, snakins, and hevein-like vicilin-like and knottins. Genetic distance lineages suggest their conservation with minimal effect of speciation events during evolution. AMPs provide durable resistance in plants through a combination of membrane lysis and cellular toxicity of the pathogen. Plant hormones - gibberellins, ethylene, jasmonates, and salicylic acid, are among the physiological regulators that regulate the expression of AMPs. Transgenically produced AMP-plants have become a means showing that AMPs are able to mitigate host defense responses while providing durable resistance against pathogens.
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Affiliation(s)
| | - Autar K Mattoo
- Sustainable Agricultural Systems Laboratory, United States Department of Agriculture, ARS's Henry A. Wallace Beltsville Agricultural Research Center, Beltsville, MD 20705, USA.
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424
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Abstract
Epsilon-poly-l-lysine (ε-PL) is a natural antimicrobial cationic peptide which is generally regarded as safe (GRAS) as a food preservative. Although its antimicrobial activity is well documented, its mechanism of action is only vaguely described. The aim of this study was to clarify ε-PL's mechanism of action using Escherichia coli and Listeria innocua as model organisms. We examined ε-PL's effect on cell morphology and membrane integrity and used an array of E. coli deletion mutants to study how specific outer membrane components affected the action of ε-PL. We furthermore studied its interaction with lipid bilayers using membrane models. In vitro cell studies indicated that divalent cations and the heptose I and II phosphate groups in the lipopolysaccharide layer of E. coli are critical for ε-PL's binding efficiency. ε-PL removed the lipopolysaccharide layer and affected cell morphology of E. coli, while L. innocua underwent minor morphological changes. Propidium iodide staining showed that ε-PL permeabilized the cytoplasmic membrane in both species, indicating the membrane as the site of attack. We compared the interaction with neutral or negatively charged membrane systems and showed that the interaction with ε-PL relied on negative charges on the membrane. Suspended membrane vesicles were disrupted by ε-PL, and a detergent-like disruption of E. coli membrane was confirmed by atomic force microscopy imaging of supported lipid bilayers. We hypothesize that ε-PL destabilizes membranes in a carpet-like mechanism by interacting with negatively charged phospholipid head groups, which displace divalent cations and enforce a negative curvature folding on membranes that leads to formation of vesicles/micelles.
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425
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Čujová S, Bednárová L, Slaninová J, Straka J, Čeřovský V. Interaction of a novel antimicrobial peptide isolated from the venom of solitary bee Colletes daviesanus with phospholipid vesicles and Escherichia coli cells. J Pept Sci 2014; 20:885-95. [PMID: 25123582 DOI: 10.1002/psc.2681] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Revised: 06/25/2014] [Accepted: 07/11/2014] [Indexed: 11/07/2022]
Abstract
The peptide named codesane (COD), consisting of 18 amino acid residues and isolated from the venom of wild bee Colletes daviesanus (Hymenoptera : Colletidae), falls into the category of cationic α-helical amphipathic antimicrobial peptides. In our investigations, synthetic COD exhibited antimicrobial activity against Gram-positive and Gram-negative bacteria and Candida albicans but also noticeable hemolytic activity. COD and its analogs (collectively referred to as CODs) were studied for the mechanism of their action. The interaction of CODs with liposomes led to significant leakage of calcein entrapped in bacterial membrane-mimicking large unilamellar vesicles made preferentially from anionic phospholipids while no calcein leakage was observed from zwitterionic liposomes mimicking membranes of erythrocytes. The preference of CODs for anionic phospholipids was also established by the blue shift in the tryptophan emission spectra maxima when the interactions of tryptophan-containing COD analogs with liposomes were examined. Those results were in agreement with the antimicrobial and hemolytic activities of CODs. Moreover, we found that the studied peptides permeated both the outer and inner cytoplasmic membranes of Escherichia coli. This was determined by measuring changes in the fluorescence of probe N-phenyl-1-naphthylamine and detecting cytoplasmic β-galactosidase released during the interaction of peptides with E. coli cells. Transmission electron microscopy revealed that treatment of E. coli with one of the COD analogs caused leakage of bacterial content mainly from the septal areas of the cells.
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Affiliation(s)
- Sabína Čujová
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 16610, Prague 6, Czech Republic; Faculty of Science, Department of Biochemistry, Charles University in Prague, Hlavova 8, 12843, Prague 2, Czech Republic
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426
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Wang J, Li Y, Wang X, Chen W, Sun H, Wang J. Lipopolysaccharide induces amyloid formation of antimicrobial peptide HAL-2. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2014; 1838:2910-8. [PMID: 25109934 DOI: 10.1016/j.bbamem.2014.07.028] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2014] [Revised: 07/01/2014] [Accepted: 07/30/2014] [Indexed: 10/24/2022]
Abstract
Lipopolysaccharide (LPS), the important component of the outer membrane of Gram-negative bacteria, contributes to the integrity of the outer membrane and protects the cell against bactericidal agents, including antimicrobial peptides. However, the mechanisms of interaction between antimicrobial peptides and LPS are not clearly understood. Halictines-2 (HAL-2), one of the novel antimicrobial peptides, was isolated from the venom of the eusocial bee Halictus sexcinctus. HAL-2 has exhibited potent antimicrobial activity against Gram-positive and Gram-negative bacteria and even against cancer cells. Here, we studied the interactions between HAL-2 and LPS to elucidate the antibacterial mechanism of HAL-2 in vitro. Our results show that HAL-2 adopts a significant degree of β-strand structure in the presence of LPS. LPS is capable of inducing HAL-2 amyloid formation, which may play a vital role in its antimicrobial activity.
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Affiliation(s)
- Jiarong Wang
- High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Science, Hefei, Anhui 230031, PR China
| | - Yan Li
- High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Science, Hefei, Anhui 230031, PR China
| | - Xiaoming Wang
- High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Science, Hefei, Anhui 230031, PR China
| | - Wei Chen
- High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Science, Hefei, Anhui 230031, PR China
| | - Hongbin Sun
- High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Science, Hefei, Anhui 230031, PR China.
| | - Junfeng Wang
- High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Science, Hefei, Anhui 230031, PR China.
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427
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Xie J, Gou Y, Zhao Q, Wang K, Yang X, Yan J, Zhang W, Zhang B, Ma C, Wang R. Antimicrobial activities and membrane-active mechanism of CPF-C1 against multidrug-resistant bacteria, a novel antimicrobial peptide derived from skin secretions of the tetraploid frogXenopus clivii. J Pept Sci 2014; 20:876-84. [DOI: 10.1002/psc.2679] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Revised: 06/21/2014] [Accepted: 07/01/2014] [Indexed: 11/06/2022]
Affiliation(s)
- Junqiu Xie
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences; Lanzhou University; Lanzhou China
| | - Yuanmei Gou
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences; Lanzhou University; Lanzhou China
| | - Qian Zhao
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences; Lanzhou University; Lanzhou China
| | - Kairong Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences; Lanzhou University; Lanzhou China
| | - Xiongli Yang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences; Lanzhou University; Lanzhou China
| | - Jiexi Yan
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences; Lanzhou University; Lanzhou China
| | - Wei Zhang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences; Lanzhou University; Lanzhou China
| | - Bangzhi Zhang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences; Lanzhou University; Lanzhou China
| | - Chi Ma
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences; Lanzhou University; Lanzhou China
| | - Rui Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences; Lanzhou University; Lanzhou China
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428
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Becucci L, Guidelli R, Polo F, Maran F. Interaction of mixed-ligand monolayer-protected Au₁₄₄ clusters with biomimetic membranes as a function of the transmembrane potential. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:8141-8151. [PMID: 24949655 DOI: 10.1021/la500909j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Understanding the interaction of nanoparticles with cell membranes is a high-priority research area for possible biomedical applications. We describe our findings concerning the interaction of Au144 monolayer-protected clusters (MPCs) with biomimetic membranes and their permeabilizing effect as a function of the transmembrane potential. We synthesized Au144(SCH2CH2Ph)60 and modified the capping monolayer with 8-mercaptooctanoic acid (Au144OctA) or thiolated trichogin (Au144TCG), a channel-forming peptide. The interactions of these MPCs with mercury-supported lipid mono- and bilayers were studied with a combination of electrochemical techniques specifically sensitive to changes in the properties of biomimetic membranes and/or charge-transfer phenomena. Permeabilization effects were evaluated through the influence of MPC uptake on the reduction of cadmium(II) ions. The nature and properties of the Au144 capping molecules play a crucial role in controlling how MPCs interact with membranes. The native MPC causes a small effect, whereas both Au144OctA and Au144TCG interact significantly with the lipid monolayer and show electroactivity. Whereas Au144OctA penetrates the membrane, Au144TCG pierces the membrane with its peptide appendage while remaining outside of it. Both clusters promote Cd(2+) reduction but with apparently different mechanisms. Because of the different way that they interact with the membrane, Au144OctA is more effective in Cd(2+) reduction when interacting with the lipid bilayer and Au144TCG performs particularly well when piercing the lipid monolayer.
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Affiliation(s)
- Lucia Becucci
- Department of Chemistry, Florence University , via della Lastruccia 3, 50019 Sesto Fiorentino (Firenze), Italy
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429
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Dong N, Zhu X, Chou S, Shan A, Li W, Jiang J. Antimicrobial potency and selectivity of simplified symmetric-end peptides. Biomaterials 2014; 35:8028-39. [PMID: 24952979 DOI: 10.1016/j.biomaterials.2014.06.005] [Citation(s) in RCA: 115] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Accepted: 06/01/2014] [Indexed: 11/19/2022]
Abstract
Because antimicrobial peptides (AMPs) are potentially useful for the treatment of multidrug-resistant infections, more attention is being paid to the structural modification and structure-function relationship of both naturally occurring and synthetic AMPs. Previous studies indicated that Protegrin-1 (PG-1), isolated from porcine leukocytes, exhibited considerable antimicrobial activity and cytotoxicity. The β-turn of PG-1 floated on the surface of bacterial membrane, while its β-strand inserted into the bacterial membrane and formed pores that were dedicated to producing cytotoxicity. For reducing cytotoxicity and improving cells selectivity, we designed a series of simplified symmetric-end peptides by combining the β-turn of PG-1 with simple amino acid repeat sequences. The sequence of designed symmetric-end peptides is (XR)nH(RX)n, (n = 1,2; X represents I, F, W and P; H represents CRRRFC). The symmetric-end peptides displayed antimicrobial activity against both gram-positive and gram-negative bacteria. In particular, (XR)2H(RX)2 (X here is I, F and W) showed greater antimicrobial potency than PG-1. Hemolysis activity and cytotoxicity, detected by using human red blood cells (RBCs) and human embryonic lung fibroblasts MRC-5 cells, were observably lower than the native peptide PG-1. (IR)2H(RI)2 (IR2), folded into β-sheet structures, displayed the highest therapeutic index, suggesting its great cell selectivity. The fluorescence spectroscopy, flow cytometry, and electron microscopy observation indicated that IR2 exhibited great membrane penetration potential by inducing membrane blebbing, disruption and lysis. Collectively, generating symmetric-end β-sheet peptides is a promising strategy for designing effective AMPs with great antimicrobial activities and cell selectivity.
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Affiliation(s)
- Na Dong
- Laboratory of Molecular Nutrition and Immunity, The Institute of Animal Nutrition, Northeast Agricultural University, Harbin, PR China
| | - Xin Zhu
- Laboratory of Molecular Nutrition and Immunity, The Institute of Animal Nutrition, Northeast Agricultural University, Harbin, PR China
| | - Shuli Chou
- Laboratory of Molecular Nutrition and Immunity, The Institute of Animal Nutrition, Northeast Agricultural University, Harbin, PR China
| | - Anshan Shan
- Laboratory of Molecular Nutrition and Immunity, The Institute of Animal Nutrition, Northeast Agricultural University, Harbin, PR China.
| | - Weizhong Li
- Laboratory of Molecular Nutrition and Immunity, The Institute of Animal Nutrition, Northeast Agricultural University, Harbin, PR China
| | - Junguang Jiang
- The State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, PR China
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430
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Xu W, Zhu X, Tan T, Li W, Shan A. Design of embedded-hybrid antimicrobial peptides with enhanced cell selectivity and anti-biofilm activity. PLoS One 2014; 9:e98935. [PMID: 24945359 PMCID: PMC4063695 DOI: 10.1371/journal.pone.0098935] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Accepted: 05/09/2014] [Indexed: 11/30/2022] Open
Abstract
Antimicrobial peptides have attracted considerable attention because of their broad-spectrum antimicrobial activity and their low prognostic to induce antibiotic resistance which is the most common source of failure in bacterial infection treatment along with biofilms. The method to design hybrid peptide integrating different functional domains of peptides has many advantages. In this study, we designed an embedded-hybrid peptide R-FV-I16 by replacing a functional defective sequence RR7 with the anti-biofilm sequence FV7 embedded in the middle position of peptide RI16. The results demonstrated that the synthetic hybrid the peptide R-FV-I16 had potent antimicrobial activity over a wide range of Gram-negative and Gram-positive bacteria, as well as anti-biofilm activity. More importantly, R-FV-I16 showed lower hemolytic activity and cytotoxicity. Fluorescent assays demonstrated that R-FV-I16 depolarized the outer and the inner bacterial membranes, while scanning electron microscopy and transmission electron microscopy further indicated that this peptide killed bacterial cells by disrupting the cell membrane, thereby damaging membrane integrity. Results from SEM also provided evidence that R-FV-I16 inherited anti-biofilm activity from the functional peptide sequence FV7. Embedded-hybrid peptides could provide a new pattern for combining different functional domains and showing an effective avenue to screen for novel antimicrobial agents.
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Affiliation(s)
- Wei Xu
- Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, Heilongjiang, China
| | - Xin Zhu
- Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, Heilongjiang, China
| | - Tingting Tan
- Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, Heilongjiang, China
| | - Weizhong Li
- Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, Heilongjiang, China
| | - Anshan Shan
- Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, Heilongjiang, China
- * E-mail:
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431
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Lima D, Torres A, Mello C, de Menezes R, Sampaio T, Canuto J, da Silva J, Freire V, Quinet Y, Havt A, Monteiro H, Nogueira N, Martins A. Antimicrobial effect of Dinoponera quadriceps
(Hymenoptera: Formicidae) venom against Staphylococcus aureus
strains. J Appl Microbiol 2014; 117:390-6. [DOI: 10.1111/jam.12548] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2013] [Revised: 04/17/2014] [Accepted: 05/17/2014] [Indexed: 11/27/2022]
Affiliation(s)
- D.B. Lima
- Department of Clinical and Toxicological Analysis; Faculty of Pharmacy; Federal University of Ceara; Fortaleza Ceara Brazil
| | - A.F.C. Torres
- Department of Clinical and Toxicological Analysis; Faculty of Pharmacy; Federal University of Ceara; Fortaleza Ceara Brazil
| | - C.P. Mello
- Department of Clinical and Toxicological Analysis; Faculty of Pharmacy; Federal University of Ceara; Fortaleza Ceara Brazil
| | - R.R.P.P.B. de Menezes
- Department of Physiology and Pharmacology; Faculty of Medicine; Federal University of Ceara; Fortaleza Ceara Brazil
| | - T.L. Sampaio
- Department of Physiology and Pharmacology; Faculty of Medicine; Federal University of Ceara; Fortaleza Ceara Brazil
| | - J.A. Canuto
- Department of Clinical and Toxicological Analysis; Faculty of Pharmacy; Federal University of Ceara; Fortaleza Ceara Brazil
| | - J.J.A. da Silva
- Federal Rural University of the Semi-Arid; Natal Rio Grande do Norte Brazil
| | - V.N. Freire
- Department of Physics; Science Center; Federal University of Ceara; Fortaleza Ceara Brazil
| | - Y.P. Quinet
- Institute of Biomedical Sciences; State University of Ceara; Fortaleza Ceara Brazil
| | - A. Havt
- Department of Physiology and Pharmacology; Faculty of Medicine; Federal University of Ceara; Fortaleza Ceara Brazil
| | - H.S.A. Monteiro
- Department of Physiology and Pharmacology; Faculty of Medicine; Federal University of Ceara; Fortaleza Ceara Brazil
| | - N.A.P. Nogueira
- Department of Clinical and Toxicological Analysis; Faculty of Pharmacy; Federal University of Ceara; Fortaleza Ceara Brazil
| | - A.M.C. Martins
- Department of Clinical and Toxicological Analysis; Faculty of Pharmacy; Federal University of Ceara; Fortaleza Ceara Brazil
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432
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Bo T, Liu M, Zhong C, Zhang Q, Su QZ, Tan ZL, Han PP, Jia SR. Metabolomic analysis of antimicrobial mechanisms of ε-poly-L-lysine on Saccharomyces cerevisiae. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:4454-4465. [PMID: 24735012 DOI: 10.1021/jf500505n] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
ε-Poly-L-lysine (ε-PL), a naturally occurring amino acid homopolymer, has been widely used as a food preservative. However, its antimicrobial mechanism has not been fully understood. This study investigated the antimicrobial mode of action of ε-PL on a yeast, Saccharomyces cerevisiae. When treated with ε-PL at the concentration of 500 μg/mL, cell mortality was close to 100% and the phospholipid bilayer curvature, pores, and micelles on the surface of S. cerevisiae were clearly observed by scanning electron microscopy (SEM). At the level of 200 μg/mL, ε-PL significantly inhibited the cell growth of S. cerevisiae. When treated with 50 μg/mL ε-PL, the yeast cell was able to grow but the cell cycle was prolonged. A significant increase in cell membrane permeability was induced by ε-PL at higher concentrations. Metabolomics analysis revealed that the ε-PL stress led to the inhibition of primary metabolic pathways through the suppression of the tricarboxylic acid cycle and glycolysis. It is therefore proposed that the microbiostatic effect of ε-PL at lower levels on S. cerevisiae is achieved by inducing intracellular metabolic imbalance via disruption of cell membrane functions. Moreover, the results suggested that the antimicrobial mechanism of ε-PL on S. cerevisiae can in fact change from microbiostatic to microbicidal when the concentration of ε-PL increased, and the mechanisms of these two modes of action were completely different.
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Affiliation(s)
- Tao Bo
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, and‡College of Biotechnology, Tianjin University of Science and Technology , Tianjin 300457, People's Republic of China
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433
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Islami M, Mehrnejad F, Doustdar F, Alimohammadi M, Khadem-Maaref M, Mir-Derikvand M, Taghdir M. Study of orientation and penetration of LAH4 into lipid bilayer membranes: pH and composition dependence. Chem Biol Drug Des 2014; 84:242-52. [PMID: 24581146 DOI: 10.1111/cbdd.12311] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Revised: 02/12/2014] [Accepted: 02/14/2014] [Indexed: 11/29/2022]
Abstract
LAH4 is an antimicrobial peptide that is believed to possess both antibiotic and DNA delivery capabilities. It is one of a number of membrane-active peptides that show increased affinity toward anionic lipids. Herein, we have performed molecular dynamics simulations to compare LAH4 effects on anionic palmitoyl-oleoyl-phosphatidylglycerol bilayer, which approximate a prokaryotic membrane environment and zwitterionic palmitoyl-oleoyl-phosphatidylcholine bilayer, which approximate a eukaryotic membrane environment. One particular interest in this work is to study how different kinds of lipid bilayers respond to the attraction of LAH4. Remarkably, our data have shown that the depth of peptide penetration strongly depends on membrane composition and pH. At acidic pH, LAH4 has exhibited a high tendency to interact strongly with and be adsorbed on anionic membrane. We have also shown that electrostatic interactions between His11 and the phosphor atoms of bilayers should have a significant impact on the penetration of LAH4. These results provide insights into the interactions of LAH4 and lipid bilayers at the atomic level, which is useful to understand cell selectivity and mechanism of the peptide action.
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Affiliation(s)
- Matin Islami
- Department of Cellular and Molecular Biology, Faculty of Science, Azarbaijan Shahid Madani University, Tabriz, 53714-161, Iran
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434
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Genomic and functional analysis of the toxic effect of tachyplesin I on the embryonic development of zebrafish. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2014; 2014:454310. [PMID: 24872839 PMCID: PMC4020500 DOI: 10.1155/2014/454310] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Accepted: 04/01/2014] [Indexed: 11/17/2022]
Abstract
Tachyplesin I (TP I) is an antimicrobial peptide isolated from the hemocytes of the horseshoe crab. With the developments of DNA microarray technology, the genetic analysis of the toxic effect of TP I on embryo was originally considered in our recent study. Based on our microarray data of the embryonic samples of zebrafish treated with the different doses of TP I, we performed a series of statistical data analyses to explore the toxic effect of TP I at the genomic level. In this paper, we first employed the hexaMplot to illustrate the continuous variation of the gene expressions of the embryonic cells treated with the different doses of TP I. The probabilistic model-based Hough transform was used to classify these differentially coexpressed genes of TP I on the zebrafish embryos. As a result, three line rays supported with the corresponding 174 genes were detected in our analysis. Some biological processes of the featured genes, such as antigen processing, nuclear chromatin, and structural constituent of eye lens, were significantly filtered with the smaller P values.
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435
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Siano A, Húmpola MV, de Oliveira E, Albericio F, Simonetta AC, Lajmanovich R, Tonarelli GG. Antimicrobial peptides from skin secretions of Hypsiboas pulchellus (Anura: Hylidae). JOURNAL OF NATURAL PRODUCTS 2014; 77:831-841. [PMID: 24717080 DOI: 10.1021/np4009317] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The skin of many amphibians produces a large repertoire of antimicrobial peptides that are crucial in the first line of defense against microbial invasion. Despite the immense richness of wild amphibians in Argentina, knowledge about peptides with antimicrobial properties is limited to a few species. Here we used LC-MS-MS to analyze samples of Hypsiboas pulchellus skin with the aim to identify antimicrobial peptides in the mass range of 1000 to 2000 Da. Twenty-three novel sequences were identified by MS, three of which were selected for chemical synthesis and further studies. The three synthetic peptides, named P1-Hp-1971, P2-Hp-1935, and P3-Hp-1891, inhibited the growth of two ATCC strains: Escherichia coli (MIC: 16, 33, and 17 μM, respectively) and Staphylococcus aureus (MIC: 8, 66, and 17 μM, respectively). P1-Hp-1971 and P3-Hp-1891 were the most active peptides. P1-Hp-1971, which showed the highest therapeutic indices (40 for E. coli and 80 for S. aureus), is a proline-glycine-rich peptide with a highly unordered structure, while P3-Hp-1891 adopts an amphipathic α-helical structure in the presence of 2,2,2-trifluoroethanol and anionic liposomes. This is the first peptidomic study of Hypsiboas pulchellus skin secretions to allow the identification of antimicrobial peptides.
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Affiliation(s)
- Alvaro Siano
- Departamento de Química Orgánica, Facultad de Bioquímica y Cs. Biológicas (FBCB), Universidad Nacional del Litoral (UNL) , Ciudad Universitaria, 3000, Santa Fe, Argentina
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436
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Killing of Mycobacterium avium by lactoferricin peptides: improved activity of arginine- and D-amino-acid-containing molecules. Antimicrob Agents Chemother 2014; 58:3461-7. [PMID: 24709266 DOI: 10.1128/aac.02728-13] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Mycobacterium avium causes respiratory disease in susceptible individuals, as well as disseminated infections in immunocompromised hosts, being an important cause of morbidity and mortality among these populations. Current therapies consist of a combination of antibiotics taken for at least 6 months, with no more than 60% overall clinical success. Furthermore, mycobacterial antibiotic resistance is increasing worldwide, urging the need to develop novel classes of antimicrobial drugs. One potential and interesting alternative strategy is the use of antimicrobial peptides (AMP). These are present in almost all living organisms as part of their immune system, acting as a first barrier against invading pathogens. In this context, we investigated the effect of several lactoferrin-derived AMP against M. avium. Short peptide sequences from both human and bovine lactoferricins, namely, hLFcin1-11 and LFcin17-30, as well as variants obtained by specific amino acid substitutions, were evaluated. All tested peptides significantly inhibited the axenic growth of M. avium, the bovine peptides being more active than the human. Arginine residues were found to be crucial for the display of antimycobacterial activity, whereas the all-d-amino-acid analogue of the bovine sequence displayed the highest mycobactericidal activity. These findings reveal the promising potential of lactoferricins against mycobacteria, thus opening the way for further research on their development and use as a new weapon against mycobacterial infections.
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437
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Johnson GA, Ellis EA, Kim H, Muthukrishnan N, Snavely T, Pellois JP. Photoinduced membrane damage of E. coli and S. aureus by the photosensitizer-antimicrobial peptide conjugate eosin-(KLAKLAK)2. PLoS One 2014; 9:e91220. [PMID: 24608860 PMCID: PMC3946741 DOI: 10.1371/journal.pone.0091220] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Accepted: 02/07/2014] [Indexed: 01/17/2023] Open
Abstract
Background/Objectives Upon irradiation with visible light, the photosensitizer-peptide conjugate eosin-(KLAKLAK)2 kills a broad spectrum of bacteria without damaging human cells. Eosin-(KLAKLAK)2 therefore represents an interesting lead compound for the treatment of local infection by photodynamic bacterial inactivation. The mechanisms of cellular killing by eosin-(KLAKLAK)2, however, remain unclear and this lack of knowledge hampers the development of optimized therapeutic agents. Herein, we investigate the localization of eosin-(KLAKLAK)2 in bacteria prior to light treatment and examine the molecular basis for the photodynamic activity of this conjugate. Methodology/Principal Findings By employing photooxidation of 3,3-diaminobenzidine (DAB), (scanning) transmission electron microscopy ((S)TEM), and energy dispersive X-ray spectroscopy (EDS) methodologies, eosin-(KLAKLAK)2 is visualized at the surface of E. coli and S. aureus prior to photodynamic irradiation. Subsequent irradiation leads to severe membrane damage. Consistent with these observations, eosin-(KLAKLAK)2 binds to liposomes of bacterial lipid composition and causes liposomal leakage upon irradiation. The eosin moiety of the conjugate mediates bacterial killing and lipid bilayer leakage by generating the reactive oxygen species singlet oxygen and superoxide. In contrast, the (KLAKLAK)2 moiety targets the photosensitizer to bacterial lipid bilayers. In addition, while (KLAKLAK)2 does not disrupt intact liposomes, the peptide accelerates the leakage of photo-oxidized liposomes. Conclusions/Significance Together, our results suggest that (KLAKLAK)2 promotes the binding of eosin Y to bacteria cell walls and lipid bilayers. Subsequent light irradiation results in membrane damage from the production of both Type I & II photodynamic products. Membrane damage by oxidation is then further aggravated by the (KLAKLAK)2 moiety and membrane lysis is accelerated by the peptide. These results therefore establish how photosensitizer and peptide act in synergy to achieve bacterial photo-inactivation. Learning how to exploit and optimize this synergy should lead to the development of future bacterial photoinactivation agents that are effective at low concentrations and at low light doses.
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Affiliation(s)
- Gregory A. Johnson
- Department of Biochemistry & Biophysics, Texas A&M University, College Station, Texas, United States of America
| | - E. Ann Ellis
- Microscopy & Imaging Center, Texas A&M University, College Station, Texas, United States of America
| | - Hansoo Kim
- Microscopy & Imaging Center, Texas A&M University, College Station, Texas, United States of America
| | - Nandhini Muthukrishnan
- Department of Biochemistry & Biophysics, Texas A&M University, College Station, Texas, United States of America
| | - Thomas Snavely
- Department of Biochemistry & Biophysics, Texas A&M University, College Station, Texas, United States of America
| | - Jean-Philippe Pellois
- Department of Biochemistry & Biophysics, Texas A&M University, College Station, Texas, United States of America
- * E-mail:
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438
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Piovesan AR, Martinelli AHS, Ligabue-Braun R, Schwartz JL, Carlini CR. Canavalia ensiformis urease, Jaburetox and derived peptides form ion channels in planar lipid bilayers. Arch Biochem Biophys 2014; 547:6-17. [PMID: 24583269 DOI: 10.1016/j.abb.2014.02.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2013] [Revised: 02/13/2014] [Accepted: 02/14/2014] [Indexed: 01/22/2023]
Abstract
Ureases catalyze the hydrolysis of urea into NH3 and CO2. They are synthesized by plants, fungi and bacteria but not by animals. Ureases display biological activities unrelated to their enzymatic activity, i.e., platelet and neutrophil activation, fungus inhibition and insecticidal effect. Urease from Canavalia ensiformis (jack bean) is toxic to several hemipteran and coleopteran insects. Jaburetox is an insecticidal fragment derived from jack bean urease. Among other effects, Jaburetox has been shown to interact with lipid vesicles. In this work, the ion channel activity of C. ensiformis urease, Jaburetox and three deletion mutants of Jaburetox (one lacking the N-terminal region, one lacking the C-terminal region and one missing the central β-hairpin) were tested on planar lipid bilayers. All proteins formed well resolved, highly cation-selective channels exhibiting two conducting states whose conductance ranges were 7-18pS and 32-79pS, respectively. Urease and the N-terminal mutant of Jaburetox were more active at negative potentials, while the channels of the other peptides did not display voltage-dependence. This is the first direct demonstration of the capacity of C. ensiformis urease and Jaburetox to permeabilize membranes through an ion channel-based mechanism, which may be a crucial step of their diverse biological activities, including host defense.
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Affiliation(s)
- Angela R Piovesan
- Graduate Program in Cellular and Molecular Biology, Center of Biotechnology, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS CEP 91501-970, Brazil
| | - Anne H S Martinelli
- Graduate Program in Cellular and Molecular Biology, Center of Biotechnology, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS CEP 91501-970, Brazil; Department of Biophysics, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS CEP 91501-970, Brazil
| | - Rodrigo Ligabue-Braun
- Graduate Program in Cellular and Molecular Biology, Center of Biotechnology, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS CEP 91501-970, Brazil
| | - Jean-Louis Schwartz
- Groupe d'étude des protéines membranaires (GÉPROM, FQR-S) and Department of Physiology, Faculty of Medicine, Université de Montréal, Montreal, Quebec H3C 3J7, Canada; Centre SÈVE (FQR-NT), Université de Sherbrooke, Sherbrooke, Quebec J1K 2R, Canada.
| | - Celia R Carlini
- Graduate Program in Cellular and Molecular Biology, Center of Biotechnology, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS CEP 91501-970, Brazil; Department of Biophysics, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS CEP 91501-970, Brazil.
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439
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Anti-leishmanial activity of the antimicrobial peptide DRS 01 observed in Leishmania infantum (syn. Leishmania chagasi) cells. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2014; 10:483-90. [DOI: 10.1016/j.nano.2013.09.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Revised: 07/08/2013] [Accepted: 09/16/2013] [Indexed: 11/24/2022]
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440
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Antimicrobial properties and membrane-active mechanism of a potential α-helical antimicrobial derived from cathelicidin PMAP-36. PLoS One 2014; 9:e86364. [PMID: 24466055 PMCID: PMC3897731 DOI: 10.1371/journal.pone.0086364] [Citation(s) in RCA: 120] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Accepted: 12/08/2013] [Indexed: 12/31/2022] Open
Abstract
Antimicrobial peptides (AMPs), which present in the non-specific immune system of organism, are amongst the most promising candidates for the development of novel antimicrobials. The modification of naturally occurring AMPs based on their residue composition and distribution is a simple and effective strategy for optimization of known AMPs. In this study, a series of truncated and residue-substituted derivatives of antimicrobial peptide PMAP-36 were designed and synthesized. The 24-residue truncated peptide, GI24, displayed antimicrobial activity comparable to the mother peptide PMAP-36 with MICs ranging from 1 to 4 µM, which is lower than the MICs of bee venom melittin. Although GI24 displayed high antimicrobial activity, its hemolytic activity was much lower than melittin, suggesting that GI24 have optimal cell selectivity. In addition, the crucial site of GI24 was identified through single site-mutation. An amino acid with high hydrophobicity at position 23 played an important role in guaranteeing the high antimicrobial activity of GI24. Then, lipid vesicles and whole bacteria were employed to investigate the membrane-active mechanisms. Membrane-simulating experiments showed that GI24 interacted strongly with negatively charged phospholipids and weakly with zwitterionic phospholipids, which corresponded well with the data of its biological activities. Membrane permeabilization and flow cytometry provide the evidence that GI24 killed microbial cells by permeabilizing the cell membrane and damaging membrane integrity. GI24 resulted in greater cell morphological changes and visible pores on cell membrane as determined using scanning electron microscopy (SEM) and transmission electron microscope (TEM). Taken together, the peptide GI24 may provide a promising antimicrobial agent for therapeutic applications against the frequently-encountered bacteria.
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441
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Alkotaji M, Pluen A, Zindy E, Hamrang Z, Aojula H. On the Cellular Uptake and Membrane Effect of the Multifunctional Peptide, TatLK15. J Pharm Sci 2014; 103:293-304. [DOI: 10.1002/jps.23778] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2013] [Revised: 09/26/2013] [Accepted: 10/18/2013] [Indexed: 11/08/2022]
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442
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Muñoz F, Palomares-Jerez MF, Daleo G, Villalaín J, Guevara MG. Possible mechanism of structural transformations induced by StAsp-PSI in lipid membranes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2014; 1838:339-47. [DOI: 10.1016/j.bbamem.2013.08.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Revised: 08/02/2013] [Accepted: 08/06/2013] [Indexed: 01/19/2023]
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443
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Ruiz J, Calderon J, Rondón-Villarreal P, Torres R. Analysis of Structure and Hemolytic Activity Relationships of Antimicrobial Peptides (AMPs). ADVANCES IN INTELLIGENT SYSTEMS AND COMPUTING 2014. [DOI: 10.1007/978-3-319-01568-2_36] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
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444
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Zhu X, Dong N, Wang Z, Ma Z, Zhang L, Ma Q, Shan A. Design of imperfectly amphipathic α-helical antimicrobial peptides with enhanced cell selectivity. Acta Biomater 2014; 10:244-57. [PMID: 24021230 DOI: 10.1016/j.actbio.2013.08.043] [Citation(s) in RCA: 143] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Revised: 08/14/2013] [Accepted: 08/29/2013] [Indexed: 11/18/2022]
Abstract
Antimicrobial peptides (AMPs), which are produced by multicellular organisms as a defense mechanism against competing pathogenic microbes, appear to be excellent candidates for the development of novel antimicrobial agents. Amphipathicity is traditionally believed to be crucial to the de novo design or systematic optimization of AMPs. In this study, we designed a series of short α-helical AMPs with imperfect amphipathicity to augment the arsenal of strategies and to gain further insights into their antimicrobial and hemolytic activity. These imperfectly amphipathic α-helical AMPs were designed by replacing the paired charged amino acid residues on the polar face of an amphipathic peptide with tryptophan residues on the basis of α-helical protein folding principles. PRW4, an imperfectly amphipathic α-helical AMP with hydrogen bonds formed by paired tryptophan residues, was observed to be more selective towards bacterial cells than toward human red blood cells. PRW4 was also effective against Gram-negative and Gram-positive bacteria, and fluorescence spectroscopy, flow cytometry, scanning electron microscopy and transmission electron microscopy indicated that PRW4 killed microbial cells by permeabilizing the cell membrane and damaging their membrane integrity. Therefore, disruptive amphipathicity has excellent potential for the rational design and optimization of AMPs with promising antimicrobial activities.
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Affiliation(s)
- Xin Zhu
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, People's Republic of China
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445
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Lopez Cascales JJ, Garro A, Porasso RD, Enriz RD. The dynamic action mechanism of small cationic antimicrobial peptides. Phys Chem Chem Phys 2014; 16:21694-705. [DOI: 10.1039/c4cp02537g] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Inhomogeneities in the pathogen membrane induced by the presence of small cationic peptides are key to explaining their molecular action.
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Affiliation(s)
- J. J. Lopez Cascales
- Universidad Politécnica de Cartagena
- Grupo de Bioinformatica y Macromoleculas (BioMac)
- Area de Química Física
- Aulario II
- 30203 Cartagena, Spain
| | - A. Garro
- Universidad Politécnica de Cartagena
- Grupo de Bioinformatica y Macromoleculas (BioMac)
- Area de Química Física
- Aulario II
- 30203 Cartagena, Spain
| | - R. D. Porasso
- Instituto de Matemática Aplicada San Luis (IMASL) – Departamento de Física
- Universidad Nacional de San Luis/CONICET
- San Luis, Argentina
| | - R. D. Enriz
- Universidad Politécnica de Cartagena
- Grupo de Bioinformatica y Macromoleculas (BioMac)
- Area de Química Física
- Aulario II
- 30203 Cartagena, Spain
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446
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Lin Y, Hu N, Lyu P, Ma J, Wang L, Zhou M, Guo S, Chen T, Shaw C. Hylaranins: prototypes of a new class of amphibian antimicrobial peptide from the skin secretion of the oriental broad-folded frog, Hylarana latouchii. Amino Acids 2013; 46:901-9. [PMID: 24378871 DOI: 10.1007/s00726-013-1655-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Accepted: 12/17/2013] [Indexed: 11/26/2022]
Abstract
Amphibian skin secretions contain a broad spectrum of biologically active compounds, particularly antimicrobial peptides, which are considered to constitute a first line of defence against bacterial infection. Here we describe the identification of two prototype peptides representing a novel structural class of antimicrobial peptide from the skin secretion of the oriental broad-folded frog, Hylarana latouchii. Named hylaranin-L1 (GVLSAFKNALPGIMKIIVamide) and hylaranin-L2 (GVLSVIKNALPGIMRFIAamide), both peptides consist of 18 amino acid residues, are C-terminally amidated and are of unique primary structures. Their primary structures were initially deduced by MS/MS fragmentation sequencing from reverse-phase HPLC fractions of skin secretion that demonstrated antimicrobial activity. Subsequently, their precursor-encoding cDNAs were cloned from a skin secretion-derived cDNA library and their primary structures were confirmed unequivocally. Synthetic replicates of both peptides exhibited broad-spectrum antimicrobial activity with mean inhibitory concentrations (MICs) of 34 μM against Gram-negative Escherichia coli, 4.3 μM against Gram-positive Staphylococcus aureus and 4-9 μM against the yeast, Candida albicans. Both peptides exhibited little haemolytic activity (<6%) at the MICs for S. aureus and C. albicans. Amphibian skin secretions thus continue to provide novel antimicrobial peptide structures that may prove to be lead compounds in the design of new classes of anti-infection therapeutics.
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Affiliation(s)
- Yan Lin
- Natural Drug Discovery Group, School of Pharmacy, Queen's University, 97 Lisburn Road, Belfast, BT9 7BL, Northern Ireland, UK
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447
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Monincová L, Buděšínský M, Čujová S, Čeřovský V, Veverka V. Structural basis for antimicrobial activity of lasiocepsin. Chembiochem 2013; 15:301-8. [PMID: 24339323 DOI: 10.1002/cbic.201300509] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Indexed: 11/06/2022]
Abstract
Lasiocepsin is a unique 27-residue antimicrobial peptide, isolated from Lasioglossum laticeps (wild bee) venom, with substantial antibacterial and antifungal activity. It adopts a well-defined structure consisting of two α-helices linked by a structured loop. Its basic residues form two distinct positively charged regions on the surface whereas aliphatic side chains contribute to solvent-accessible hydrophobic areas, thus emphasising the amphipathic character of the molecule. Lasiocepsin structurally belongs to the ShK family and shows a strong preference for anionic phospholipids; this is further augmented by increasing concentrations of cardiolipin, such as those found at the poles of bacterial cells. The membrane-permeabilising activity of the peptide is not limited to outer membranes of Gram-negative bacteria. The peptide interacts with phospholipids initially through its N terminus, and its degree of penetration is strongly dependent on the presence of cardiolipin.
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Affiliation(s)
- Lenka Monincová
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nam. 2, 16610 Prague 6 (Czech Republic)
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448
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Jackman JA, Zan GH, Zhdanov VP, Cho NJ. Rupture of Lipid Vesicles by a Broad-Spectrum Antiviral Peptide: Influence of Vesicle Size. J Phys Chem B 2013; 117:16117-28. [DOI: 10.1021/jp409716p] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Joshua A. Jackman
- School
of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue 639798, Singapore
- Centre
for Biomimetic Sensor Science, Nanyang Technological University, 50 Nanyang
Drive 637553, Singapore
| | - Goh Haw Zan
- School
of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue 639798, Singapore
- Centre
for Biomimetic Sensor Science, Nanyang Technological University, 50 Nanyang
Drive 637553, Singapore
| | - Vladimir P. Zhdanov
- School
of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue 639798, Singapore
- Centre
for Biomimetic Sensor Science, Nanyang Technological University, 50 Nanyang
Drive 637553, Singapore
- Boreskov
Institute of Catalysis, Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Nam-Joon Cho
- School
of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue 639798, Singapore
- Centre
for Biomimetic Sensor Science, Nanyang Technological University, 50 Nanyang
Drive 637553, Singapore
- School
of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive 637459, Singapore
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449
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Isolation and identification of a new intracellular antimicrobial peptide produced by Paenibacillus alvei AN5. World J Microbiol Biotechnol 2013; 30:1377-85. [DOI: 10.1007/s11274-013-1558-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Accepted: 11/11/2013] [Indexed: 10/26/2022]
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450
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James T, Gallagher L, Titze J, Bourke P, Kavanagh J, Arendt E, Bond U. In situ
production of human β
defensin-3 in lager yeasts provides bactericidal activity against beer-spoiling bacteria under fermentation conditions. J Appl Microbiol 2013; 116:368-79. [DOI: 10.1111/jam.12382] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Revised: 09/01/2013] [Accepted: 10/21/2013] [Indexed: 02/03/2023]
Affiliation(s)
- T.C. James
- Moyne Institute for Preventive Medicine; School of Genetics and Microbiology; Trinity College Dublin; College Green; Dublin Ireland
| | - L. Gallagher
- Moyne Institute for Preventive Medicine; School of Genetics and Microbiology; Trinity College Dublin; College Green; Dublin Ireland
| | - J. Titze
- School of Food and Nutritional Science; University College Cork; Cork Ireland
| | - P. Bourke
- Moyne Institute for Preventive Medicine; School of Genetics and Microbiology; Trinity College Dublin; College Green; Dublin Ireland
| | - J. Kavanagh
- Moyne Institute for Preventive Medicine; School of Genetics and Microbiology; Trinity College Dublin; College Green; Dublin Ireland
| | - E. Arendt
- School of Food and Nutritional Science; University College Cork; Cork Ireland
| | - U. Bond
- Moyne Institute for Preventive Medicine; School of Genetics and Microbiology; Trinity College Dublin; College Green; Dublin Ireland
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