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Shobade SO, Zabotina OA, Nilsen-Hamilton M. Plant root associated chitinases: structures and functions. FRONTIERS IN PLANT SCIENCE 2024; 15:1344142. [PMID: 38362446 PMCID: PMC10867124 DOI: 10.3389/fpls.2024.1344142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2023] [Accepted: 01/05/2024] [Indexed: 02/17/2024]
Abstract
Chitinases degrade chitin, a linear homopolymer of β-1,4-linked N-acetyl-D-glucosamine (GlcNAc) residues found in the cell walls of fungi and the exoskeletons of arthropods. They are secreted by the roots into the rhizosphere, a complex and dynamic environment where intense nutrient exchange occurs between plants and microbes. Here we modeled, expressed, purified, and characterized Zea mays and Oryza sativa root chitinases, and the chitinase of a symbiotic bacterium, Chitinophaga oryzae 1303 for their activities with chitin, di-, tri-, and tetra-saccharides and Aspergillus niger, with the goal of determining their role(s) in the rhizosphere and better understanding the molecular mechanisms underlying plant-microbe interactions. We show that Zea mays basic endochitinase (ZmChi19A) and Oryza sativa chitinase (OsChi19A) are from the GH19 chitinase family. The Chitinophaga oryzae 1303 chitinase (CspCh18A) belongs to the GH18 family. The three enzymes have similar apparent K M values of (20-40 µM) for the substrate 4-MU-GlcNAc3. They vary in their pH and temperature optima with OsChi19A activity optimal between pH 5-7 and 30-40°C while ZmChi19A and CspCh18A activities were optimal at pH 7-9 and 50-60°C. Modeling and site-directed mutation of ZmChi19A identified the catalytic cleft and the active residues E147 and E169 strategically positioned at ~8.6Å from each other in the folded protein. Cleavage of 4-MU-GlcNAc3 was unaffected by the absence of the CBD but diminished in the absence of the flexible C-terminal domain. However, unlike for the soluble substrate, the CBD and the newly identified flexible C-terminal domain were vital for inhibiting Aspergillus niger growth. The results are consistent with the involvement of the plant chitinases in defense against pathogens like fungi that have chitin exoskeletons. In summary, we have characterized the functional features and structural domains necessary for the activity of two plant root chitinases that are believed to be involved in plant defense and a bacterial chitinase that, along with the plant chitinases, may participate in nutrient recycling in the rhizosphere.
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Affiliation(s)
- Samuel O. Shobade
- Ames National Laboratory, U. S. Department of Energy, Ames, IA, United States
- Roy J. Carver Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, IA, United States
| | - Olga A. Zabotina
- Ames National Laboratory, U. S. Department of Energy, Ames, IA, United States
- Roy J. Carver Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, IA, United States
| | - Marit Nilsen-Hamilton
- Ames National Laboratory, U. S. Department of Energy, Ames, IA, United States
- Roy J. Carver Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, IA, United States
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Lipid-A-dependent and cholesterol-dependent dynamics properties of liposomes from gram-negative bacteria in ESKAPE. Sci Rep 2022; 12:19474. [PMID: 36376343 PMCID: PMC9663605 DOI: 10.1038/s41598-022-22886-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 10/20/2022] [Indexed: 11/16/2022] Open
Abstract
AntiMicrobial Resistance (AMR) is a worldwide health emergency. ESKAPE pathogens include the most relevant AMR bacterial families. In particular, Gram-negative bacteria stand out due to their cell envelope complexity which exhibits strong resistance to antimicrobials. A key element for AMR is the chemical structure of lipid A, modulating the physico-chemical properties of the membrane and permeability to antibiotics. Liposomes are used as models of bacterial membrane infective vesicles. In this work, coarse-grained molecular dynamics simulations were used to model liposomes from ESKAPE Gram-negative bacteria (Escherichia coli, Klebsiella pneumoniae, Acinetobacter baumannii, and Pseudomonas aeruginosa). We captured the role of lipid A, cardiolipin and cholesterol on liposome morphology and physico-chemical properties. Additionally, the reported antimicrobial peptides Cecropin B1, JB95, and PTCDA1-kf, were used to unveil their implications on membrane disruption. This study opens a promising starting point to understand molecular keys of bacterial membranes and to promote the discovery of new antimicrobials to overcome AMR.
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Nogueira TAC, Kaefer IL, Sartim MA, Pucca MB, Sachett J, Barros AL, Júnior MBA, Baía-da-Silva DC, Bernarde PS, Koolen HHF, Monteiro WM. The Amazonian kambô frog Phyllomedusa bicolor (Amphibia: Phyllomedusidae): Current knowledge on biology, phylogeography, toxinology, ethnopharmacology and medical aspects. Front Pharmacol 2022; 13:997318. [PMID: 36278168 PMCID: PMC9582840 DOI: 10.3389/fphar.2022.997318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 08/24/2022] [Indexed: 11/13/2022] Open
Abstract
Phyllomedusa bicolor (Phyllomedusidae), popularly known as the kambô in Brazil, is a tree frog that is widely distributed in South American countries and is known for producing a skin secretion that is rich in bioactive peptides, which are often used in indigenous rituals. The biological effects of the skin secretion were observed in the first studies with indigenous communities. Over the last six decades, researchers have been studying the chemical composition in detail, as well as the potential pharmacological applications of its constituents. For this reason, indigenous communities and health agents fear the misuse of the kambô, or the inappropriate use of the species, which can result in health complications or even death of users. This article seeks to provide a transdisciplinary review that integrates knowledge regarding the biology of P. bicolor, ethnoknowledge about the ritual of the kambô, and the chemistry and pharmacology of the skin secretion of this species, in addition to medical aspects of the indiscriminate use of the kambô. Furthermore, this review seeks to shed light on perspectives on the future of research related to the kambô.
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Affiliation(s)
- Thais A. C. Nogueira
- Departamento de Ensino e Pesquisa, Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Manaus, Amazonas, Brazil
- Grupo de Pesquisas em Metabolômica e Espectrometria de Massas, Universidade do Estado do Amazonas, Manaus, Amazonas, Brazil
| | - Igor Luis Kaefer
- Instituto de Ciências Biológicas, Universidade Federal do Amazonas, Manaus, Amazonas, Brazil
| | - Marco A. Sartim
- Departamento de Ensino e Pesquisa, Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Manaus, Amazonas, Brazil
- Grupo de Pesquisas em Metabolômica e Espectrometria de Massas, Universidade do Estado do Amazonas, Manaus, Amazonas, Brazil
- Departamento de Pós-Graduação, Universidade Nilton Lins, Manaus, Amazonas, Brazil
| | - Manuela B. Pucca
- Curso de Medicina, Universidade Federal de Roraima, Boa Vista, Roraima, Brazil
| | - Jacqueline Sachett
- Departamento de Ensino e Pesquisa, Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Manaus, Amazonas, Brazil
- Grupo de Pesquisas em Metabolômica e Espectrometria de Massas, Universidade do Estado do Amazonas, Manaus, Amazonas, Brazil
- Departamento de Ensino e Pesquisa, Fundação Alfredo da Matta, Manaus, Amazonas, Brazil
| | - André L. Barros
- Grupo de Pesquisas em Metabolômica e Espectrometria de Massas, Universidade do Estado do Amazonas, Manaus, Amazonas, Brazil
| | - Moysés B. A. Júnior
- Grupo de Pesquisas em Metabolômica e Espectrometria de Massas, Universidade do Estado do Amazonas, Manaus, Amazonas, Brazil
- Instituto de Ciências Exatas e Tecnologia, Universidade Federal do Amazonas, Itacoatiara, Amazonas, Brazil
| | - Djane C. Baía-da-Silva
- Departamento de Ensino e Pesquisa, Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Manaus, Amazonas, Brazil
- Grupo de Pesquisas em Metabolômica e Espectrometria de Massas, Universidade do Estado do Amazonas, Manaus, Amazonas, Brazil
| | - Paulo S. Bernarde
- Laboratório de Herpetologia, Campus Floresta, Universidade Federal do Acre, Cruzeiro do Sul, Acre, Brazil
| | - Hector H. F. Koolen
- Grupo de Pesquisas em Metabolômica e Espectrometria de Massas, Universidade do Estado do Amazonas, Manaus, Amazonas, Brazil
| | - Wuelton M. Monteiro
- Departamento de Ensino e Pesquisa, Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Manaus, Amazonas, Brazil
- Grupo de Pesquisas em Metabolômica e Espectrometria de Massas, Universidade do Estado do Amazonas, Manaus, Amazonas, Brazil
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Sato H, Shimizu M, Watanabe K, Yoshida J, Kawamura I, Koshoubu J. Multidimensional Vibrational Circular Dichroism Apparatus Equipped with Quantum Cascade Laser and Its Use for Investigating Some Peptide Systems Containing d-Amino Acids. Anal Chem 2021; 93:2742-2748. [DOI: 10.1021/acs.analchem.0c02990] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Hisako Sato
- Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan
| | - Masaru Shimizu
- JASCO Corporation, Ishikawa 2967-5, Hachioji, Tokyo 192-8537, Japan
| | - Keisuke Watanabe
- JASCO Corporation, Ishikawa 2967-5, Hachioji, Tokyo 192-8537, Japan
| | - Jun Yoshida
- Department of Chemistry, School of Science, Kitasato University, Kitasato 1-15-1, Sagamihara 252-0373, Japan
| | - Izuru Kawamura
- Graduate School of Engineering Science, Yokohama National University, Hodogaya-ku, Yokohama 240-8501, Japan
| | - Jun Koshoubu
- JASCO Corporation, Ishikawa 2967-5, Hachioji, Tokyo 192-8537, Japan
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Fan H, Wang J, Tao Z, Huang J, Rao P, Kurokawa T, Gong JP. Adjacent cationic-aromatic sequences yield strong electrostatic adhesion of hydrogels in seawater. Nat Commun 2019; 10:5127. [PMID: 31719537 PMCID: PMC6851134 DOI: 10.1038/s41467-019-13171-9] [Citation(s) in RCA: 122] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 10/24/2019] [Indexed: 11/23/2022] Open
Abstract
Electrostatic interaction is strong but usually diminishes in high ionic-strength environments. Biosystems can use this interaction through adjacent cationic-aromatic amino acids sequence of proteins even in a saline medium. Application of such specific sequence to the development of cationic polymer materials adhesive to negatively charged surfaces in saline environments is challenging due to the difficulty in controlling the copolymer sequences. Here, we discover that copolymers with adjacent cation-aromatic sequences can be synthesized through cation-π complex-aided free-radical polymerization. Sequence controlled hydrogels from diverse cation/aromatic monomers exhibit fast, strong but reversible adhesion to negatively charged surfaces in seawater. Aromatics on copolymers are found to enhance the electrostatic interactions of their adjacent cationic residues to the counter surfaces, even in a high ionic-strength medium that screens the electrostatic interaction for common polyelectrolytes. This work opens a pathway to develop adhesives using saline water.
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Affiliation(s)
- Hailong Fan
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, N21W10, Kita-ku, Sapporo, 001-0021, Japan
- Faculty of Advanced Life Science, Hokkaido University, N21W11, Kita-ku, Sapporo, 001-0021, Japan
| | - Jiahui Wang
- Graduate School of Life Science, Hokkaido University, N21W11, Kita-ku, Sapporo, 001-0021, Japan
| | - Zhen Tao
- Graduate School of Life Science, Hokkaido University, N21W11, Kita-ku, Sapporo, 001-0021, Japan
| | - Junchao Huang
- Faculty of Advanced Life Science, Hokkaido University, N21W11, Kita-ku, Sapporo, 001-0021, Japan
| | - Ping Rao
- Graduate School of Life Science, Hokkaido University, N21W11, Kita-ku, Sapporo, 001-0021, Japan
| | - Takayuki Kurokawa
- Faculty of Advanced Life Science, Hokkaido University, N21W11, Kita-ku, Sapporo, 001-0021, Japan
- Global Station for Soft Matter GI-CoRE, Hokkaido University, N21W11, Kita-ku, Sapporo, 001-0021, Japan
| | - Jian Ping Gong
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, N21W10, Kita-ku, Sapporo, 001-0021, Japan.
- Faculty of Advanced Life Science, Hokkaido University, N21W11, Kita-ku, Sapporo, 001-0021, Japan.
- Global Station for Soft Matter GI-CoRE, Hokkaido University, N21W11, Kita-ku, Sapporo, 001-0021, Japan.
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Petkov P, Lilkova E, Ilieva N, Litov L. Self-Association of Antimicrobial Peptides: A Molecular Dynamics Simulation Study on Bombinin. Int J Mol Sci 2019; 20:ijms20215450. [PMID: 31683755 PMCID: PMC6862524 DOI: 10.3390/ijms20215450] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 10/26/2019] [Accepted: 10/28/2019] [Indexed: 12/29/2022] Open
Abstract
Antimicrobial peptides (AMPs) are a diverse group of membrane-active peptides which play a crucial role as mediators of the primary host defense against microbial invasion. Many AMPs are found to be fully or partially disordered in solution and to acquire secondary structure upon interaction with a lipid membrane. Here, we report molecular dynamics simulations studies on the solution behaviour of a specific AMP, bombinin H2. We show that in monomeric form in water solution the peptide is somewhat disordered and preferably adopts a helix-loop-helix conformation. However, when more than a single monomer is placed in the solution, the peptides self-associate in aggregates. Within the aggregate, the peptides provide each other with an amphipathic environment that mimics the water–membrane interface, which allows them to adopt a single-helix structure. We hypothesise that this is the mechanism by which bombinin H2 and, possibly, other small linear AMPs reach the target membrane in a functional folded state and are able to effectively exert their antimicrobial action on it.
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Affiliation(s)
- Peicho Petkov
- Faculty of Physics, Atomic Physics Department, Sofia University "St. Kliment Ohridski", 5 J. Bouchier Blvd, 1164 Sofia, Bulgaria.
| | - Elena Lilkova
- Institute of Information and Communication Technologies at the Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Block 25A, 1113 Sofia, Bulgaria.
| | - Nevena Ilieva
- Institute of Information and Communication Technologies at the Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Block 25A, 1113 Sofia, Bulgaria.
- Institute of Informatics and Mathematics at the Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Block 8, 1113 Sofia, Bulgaria.
| | - Leandar Litov
- Faculty of Physics, Atomic Physics Department, Sofia University "St. Kliment Ohridski", 5 J. Bouchier Blvd, 1164 Sofia, Bulgaria.
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Pantic J, Guilhaudis L, Musale V, Attoub S, Lukic ML, Mechkarska M, Conlon JM. Immunomodulatory, insulinotropic, and cytotoxic activities of phylloseptins and plasticin-TR from the Trinidanian leaf frog Phyllomedusa trinitatis. J Pept Sci 2019; 25:e3153. [PMID: 30734396 DOI: 10.1002/psc.3153] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Revised: 01/11/2019] [Accepted: 01/14/2019] [Indexed: 12/13/2022]
Abstract
The aim of the study was to determine the in vitro immunomodulatory, cytotoxic, and insulin-releasing activities of seven phylloseptin-TR peptides and plasticin-TR, first isolated from the frog Phyllomedusa trinitatis. The most cationic peptides, phylloseptin-1.1TR and phylloseptin-3.1TR, showed greatest cytotoxic potency against A549, MDA-MB231, and HT-29 human tumor-derived cells and against mouse erythrocytes. Phylloseptin-4TR was the most hydrophobic and the most effective peptide at inhibiting production of the proinflammatory cytokines TNF-α and IL-1β by mouse peritoneal cells but was without effect on production of the antiinflammatory cytokine IL-10. Phylloseptin-2.1TR and phylloseptin-3.3TR were the most effective at stimulating the production of IL-10. The noncytotoxic peptide, plasticin-TR, inhibited production of TNF-α and IL-1β but was without effect on IL-10 production. The results of CD spectroscopy suggest that the different properties of plasticin-TR compared with the immunostimulatory activities of the previously characterized plasticin-L1 from Leptodactylus laticeps may arise from greater ability of plasticin-TR to oligomerize and adopt a stable helical conformation in a membrane-mimetic environment. All peptides stimulated release of insulin from BRIN-BD11 rat clonal β cells with phylloseptin-3.2TR being the most potent and effective and phylloseptin-2.1TR the least effective suggesting that insulinotropic potency correlates inversely with helicity. The study has provided insight into structure-activity relationships among the phylloseptins. The combination of immunomodulatory and insulinotropic activities together with low cytotoxicity suggests that phylloseptin-3.3TR and plasticin-TR may represent templates for the development of agents for use in antiinflammatory and type 2 diabetes therapies.
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Affiliation(s)
- Jelena Pantic
- Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Laure Guilhaudis
- Normandy University, COBRA, UMR 6014 & FR 3038, Université de Rouen, INSA, Rouen, France
| | - Vishal Musale
- Diabetes Research Group, School of Biomedical Sciences, Ulster University, Coleraine, UK
| | - Samir Attoub
- Department of Pharmacology, College of Medicine and Health Sciences, United Arab Emirates University, Al-Ain, United Arab Emirates
| | - Miodrag L Lukic
- Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Milena Mechkarska
- Department of Life Sciences, The University of the West Indies, St. Augustine, Trinidad and Tobago
| | - J Michael Conlon
- Diabetes Research Group, School of Biomedical Sciences, Ulster University, Coleraine, UK
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Michel JP, Wang YX, Kiesel I, Gerelli Y, Rosilio V. Disruption of Asymmetric Lipid Bilayer Models Mimicking the Outer Membrane of Gram-Negative Bacteria by an Active Plasticin. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:11028-11039. [PMID: 28921990 DOI: 10.1021/acs.langmuir.7b02864] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The outer membrane (OM) of Gram-negative bacteria is a complex and asymmetric bilayer that antimicrobial peptides must disrupt in order to provoke the cell lysis. The inner and external leaflets of the OM are mainly composed of phospholipids (PL), and lipopolysaccharide (LPS), respectively. Supported lipid bilayers are interesting model systems to mimic the lipid asymmetric scaffold of the OM and determine the quantitative and mechanistic effect of antimicrobial agents, using complementary physicochemical techniques. We report the formation of asymmetric PL/LPS bilayers using the Langmuir-Blodgett/Langmuir-Schaefer technique on two different surfaces (sapphire and mica) with synthetic phospholipids constituting the inner leaflet and bacteria-extracted mutant LPS making up the outer one. The combination of neutron reflectometry and atomic force microscopy techniques allowed the examination of the asymmetric scaffold structure along the normal to the interface and its surface morphology in buffer conditions. Our results allow discrimination of two structurally related peptides, one neutral and inactive, and the other cationic and active. The active cationic plasticin PTCDA1-KF disrupts the asymmetric OM at relevant concentrations through a carpeting scenario characterized by a dramatic removal of lipid molecules from the surface.
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Affiliation(s)
- J P Michel
- Institut Galien Paris Sud, Univ Paris Sud, Université Paris-Saclay, 5 rue Jean-Baptiste Clément, F-92296 Châtenay-Malabry, France
- CNRS, UMR 8612, F-92296 Châtenay-Malabry, France
| | - Y X Wang
- Institut Galien Paris Sud, Univ Paris Sud, Université Paris-Saclay, 5 rue Jean-Baptiste Clément, F-92296 Châtenay-Malabry, France
- CNRS, UMR 8612, F-92296 Châtenay-Malabry, France
| | - I Kiesel
- Institut Laue-Langevin , 71 avenue des Martyrs, 38000, Grenoble, France
| | - Y Gerelli
- Institut Laue-Langevin , 71 avenue des Martyrs, 38000, Grenoble, France
| | - V Rosilio
- Institut Galien Paris Sud, Univ Paris Sud, Université Paris-Saclay, 5 rue Jean-Baptiste Clément, F-92296 Châtenay-Malabry, France
- CNRS, UMR 8612, F-92296 Châtenay-Malabry, France
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The first identified cathelicidin from tree frogs possesses anti-inflammatory and partial LPS neutralization activities. Amino Acids 2017; 49:1571-1585. [PMID: 28593346 PMCID: PMC5561178 DOI: 10.1007/s00726-017-2449-7] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Accepted: 06/02/2017] [Indexed: 11/23/2022]
Abstract
As of February 2017, approximately 7639 amphibian species have been described in the AmphibiaWeb database. However, only 20 cathelicidin-like antimicrobial peptides have been identified to date from 10 amphibian species. Half of these peptides were identified from genome sequences and have not yet been functionally characterized. In this study, a novel cathelicidin-like peptide designated cathelicidin-PP was purified from the skin of tree frog Polypedates puerensis. Cathelicidin-PP is a 32 residue peptide of sequence ASENGKCNLLCLVKKKLRAVGNVIKTVVGKIA. Circular dichroism spectroscopy indicated that cathelicidin-PP mainly adopts a β-sheet structure in membrane-mimetic solutions. Cathelicidin-PP exhibits potent antimicrobial activity against bacteria and fungi, especially Gram-negative bacteria. Meanwhile, it shows low cytotoxicity toward mammalian cells. Scanning electron microscopy analysis indicated that cathelicidin-PP kills bacteria through the disruption of the bacterial cell membrane integrity. Furthermore, cathelicidin-PP exerts significant anti-inflammatory functions by inhibiting the lipopolysaccharide (LPS)-mediated generation of nitric oxide and pro-inflammatory cytokines, tumor necrosis factor-α, interleukin-1β, and interleukin-6. The MAPKs (ERK, JNK, and p38) and NF-κB signaling pathways are involved in the anti-inflammatory effect. Cathelicidin-PP caused partial neutralization of LPS in a dose-dependent manner. Quantitative PCR indicated that infection of tree frogs with bacteria causes increased expression of cathelicidin-PP in immune-related tissues. Taken together, cathelicidin-PP is the first identified cathelicidin-like peptide from tree frogs. Our findings demonstrate that in addition to direct bactericidal capacity, cathelicidin-PP also possesses immunomodulatory properties, including partial neutralization of LPS, and inhibiting the production of inflammatory cytokines.
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Ageitos J, Sánchez-Pérez A, Calo-Mata P, Villa T. Antimicrobial peptides (AMPs): Ancient compounds that represent novel weapons in the fight against bacteria. Biochem Pharmacol 2017; 133:117-138. [DOI: 10.1016/j.bcp.2016.09.018] [Citation(s) in RCA: 328] [Impact Index Per Article: 46.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 09/19/2016] [Indexed: 01/01/2023]
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Michel JP, Wang YX, Dé E, Fontaine P, Goldmann M, Rosilio V. Charge and aggregation pattern govern the interaction of plasticins with LPS monolayers mimicking the external leaflet of the outer membrane of Gram-negative bacteria. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2015; 1848:2967-79. [PMID: 26343162 DOI: 10.1016/j.bbamem.2015.09.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 09/01/2015] [Accepted: 09/02/2015] [Indexed: 11/15/2022]
Abstract
Bacterial resistance to antibiotics has become today a major public health issue. In the development of new anti-infectious therapies, antimicrobial peptides appear as promising candidates. However, their mechanisms of action against bacterial membranes are still poorly understood. We describe for the first time the interaction and penetration of plasticins into lipid monolayers and bilayers modeling the two leaflets of the asymmetrical outer membrane of Gram-negative bacteria. The lipid composition of these monolayers mimics that of each leaflet: mixtures of LPS Re 595 mutant and wild type S-form from Salmonella enterica for the external leaflet, and SOPE/SOPG/cardiolipin (80/15/5) for the inner one. The analysis of the interfacial behavior of native (PTCDA1) and modified (PTCDA1-KF) antimicrobial plasticins showed that PTCDA1-KF exhibited better surface properties than its unmodified counterpart. Both peptides could penetrate into the model monolayers at concentrations higher than 0.1 μM. The penetration was particularly enhanced for PTCDA1-KF into the mixed LPS monolayer, due to attractive electrostatic interactions. Grazing X-ray diffraction and atomic force microscopy studies revealed the changes in LPS monolayers organization upon peptide insertion. The interaction of plasticins with liposomes was also monitored by light scattering and circular dichroism techniques. Only the cationic plasticin achieved full disaggregation and structuration in α helices, whereas the native one remained aggregated and unstructured. The main steps of the penetration mechanism of the two plasticins into lipid models of the external leaflet of the outer membrane of Gram-negative bacteria have been established.
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Affiliation(s)
- J P Michel
- Univ Paris-Sud, Institut Galien Paris Sud, 5 rue Jean-Baptiste Clément, F-92296 Châtenay-Malabry cedex, France; CNRS, UMR 8612, F-92296 Châtenay-Malabry, France.
| | - Y X Wang
- Univ Paris-Sud, Institut Galien Paris Sud, 5 rue Jean-Baptiste Clément, F-92296 Châtenay-Malabry cedex, France; CNRS, UMR 8612, F-92296 Châtenay-Malabry, France
| | - E Dé
- Normandie Univ, France; CNRS, UMR 6270, F-76821 Mont-Saint-Aignan Cedex, France
| | - P Fontaine
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin, BP48, F-91192 Gif-sur-Yvette Cedex, France
| | - M Goldmann
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin, BP48, F-91192 Gif-sur-Yvette Cedex, France; INSP, UPMC, 5 place Jussieu, F-75005 Paris, France; CNRS, UMR 7588, F-75005 Paris, France
| | - V Rosilio
- Univ Paris-Sud, Institut Galien Paris Sud, 5 rue Jean-Baptiste Clément, F-92296 Châtenay-Malabry cedex, France; CNRS, UMR 8612, F-92296 Châtenay-Malabry, France
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13
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Xu X, Lai R. The chemistry and biological activities of peptides from amphibian skin secretions. Chem Rev 2015; 115:1760-846. [PMID: 25594509 DOI: 10.1021/cr4006704] [Citation(s) in RCA: 233] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Xueqing Xu
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology , Kunming 650223, Yunnan, China
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14
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Carlier L, Joanne P, Khemtémourian L, Lacombe C, Nicolas P, El Amri C, Lequin O. Investigating the role of GXXXG motifs in helical folding and self-association of plasticins, Gly/Leu-rich antimicrobial peptides. Biophys Chem 2015; 196:40-52. [DOI: 10.1016/j.bpc.2014.09.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Revised: 09/16/2014] [Accepted: 09/19/2014] [Indexed: 12/24/2022]
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15
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Raja Z, André S, Piesse C, Sereno D, Nicolas P, Foulon T, Oury B, Ladram A. Structure, antimicrobial activities and mode of interaction with membranes of novel [corrected] phylloseptins from the painted-belly leaf frog, Phyllomedusa sauvagii. PLoS One 2013; 8:e70782. [PMID: 23967105 PMCID: PMC3742671 DOI: 10.1371/journal.pone.0070782] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2013] [Accepted: 06/21/2013] [Indexed: 02/06/2023] Open
Abstract
Transcriptomic and peptidomic analysis of skin secretions from the Painted-belly leaf frog Phyllomedusa sauvagii led to the identification of 5 novel phylloseptins (PLS-S2 to -S6) and also of phylloseptin-1 (PSN-1, here renamed PLS-S1), the only member of this family previously isolated in this frog. Synthesis and characterization of these phylloseptins revealed differences in their antimicrobial activities. PLS-S1, -S2, and -S4 (79–95% amino acid sequence identity; net charge = +2) were highly potent and cidal against Gram-positive bacteria, including multidrug resistant S. aureus strains, and killed the promastigote stage of Leishmania infantum, L. braziliensis and L. major. By contrast, PLS-S3 (95% amino acid identity with PLS-S2; net charge = +1) and -S5 (net charge = +2) were found to be almost inactive against bacteria and protozoa. PLS-S6 was not studied as this peptide was closely related to PLS-S1. Differential scanning calorimetry on anionic and zwitterionic multilamellar vesicles combined with circular dichroism spectroscopy and membrane permeabilization assays on bacterial cells indicated that PLS-S1, -S2, and -S4 are structured in an amphipathic α-helix that disrupts the acyl chain packing of anionic lipid bilayers. As a result, regions of two coexisting phases could be formed, one phase rich in peptide and the other lipid-rich. After reaching a threshold peptide concentration, the disruption of lipid packing within the bilayer may lead to local cracks and disintegration of the microbial membrane. Differences in the net charge, α-helical folding propensity, and/or degree of amphipathicity between PLS-S1, -S2 and -S4, and between PLS-S3 and -S5 appear to be responsible for their marked differences in their antimicrobial activities. In addition to the detailed characterization of novel phylloseptins from P. sauvagii, our study provides additional data on the previously isolated PLS-S1 and on the mechanism of action of phylloseptins.
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Affiliation(s)
- Zahid Raja
- UPMC Univ Paris 06, ER3 Biogenèse des Signaux Peptidiques (BIOSIPE), Paris, France
| | - Sonia André
- UPMC Univ Paris 06, ER3 Biogenèse des Signaux Peptidiques (BIOSIPE), Paris, France
| | - Christophe Piesse
- UPMC Univ Paris 06, IFR 83 Plate-forme Ingénierie des Protéines et Synthèse Peptidique, Paris, France
| | - Denis Sereno
- Institut de Recherche pour le Développement (IRD), Unité Mixte de Recherche IRD 224-CNRS 5290-Univ Montpellier 1 et 2, Maladies infectieuses et Vecteurs: écologie, génétique, évolution et contrôle (MiVegec), Montpellier, France
| | - Pierre Nicolas
- UPMC Univ Paris 06, ER3 Biogenèse des Signaux Peptidiques (BIOSIPE), Paris, France
| | - Thierry Foulon
- UPMC Univ Paris 06, ER3 Biogenèse des Signaux Peptidiques (BIOSIPE), Paris, France
| | - Bruno Oury
- Institut de Recherche pour le Développement (IRD), Unité Mixte de Recherche IRD 224-CNRS 5290-Univ Montpellier 1 et 2, Maladies infectieuses et Vecteurs: écologie, génétique, évolution et contrôle (MiVegec), Montpellier, France
| | - Ali Ladram
- UPMC Univ Paris 06, ER3 Biogenèse des Signaux Peptidiques (BIOSIPE), Paris, France
- * E-mail:
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16
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Purification, molecular cloning, and antimicrobial activity of peptides from the skin secretion of the black-spotted frog, Rana nigromaculata. World J Microbiol Biotechnol 2013; 29:1941-9. [DOI: 10.1007/s11274-013-1360-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Accepted: 04/22/2013] [Indexed: 02/07/2023]
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17
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Kamech N, Vukičević D, Ladram A, Piesse C, Vasseur J, Bojović V, Simunić J, Juretić D. Improving the Selectivity of Antimicrobial Peptides from Anuran Skin. J Chem Inf Model 2012; 52:3341-51. [DOI: 10.1021/ci300328y] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Nédia Kamech
- Université Pierre et Marie Curie - Paris 06, Equipe Biogenèse des signaux
peptidiques, ER3, 7 Quai Saint-Bernard, 75252 Paris cedex 05, France
| | - Damir Vukičević
- Faculty of Science, University of Split, 21000 Split, Croatia
| | - Ali Ladram
- Université Pierre et Marie Curie - Paris 06, Equipe Biogenèse des signaux
peptidiques, ER3, 7 Quai Saint-Bernard, 75252 Paris cedex 05, France
| | - Christophe Piesse
- Université Pierre et Marie Curie - Paris 06, Ingénierie des protéines,
Institut de Biologie intégrative IFR 83, 7 Quai Saint-Bernard,
75252 Paris cedex 05, France
| | - Julie Vasseur
- Université Pierre et Marie Curie - Paris 06, Equipe Biogenèse des signaux
peptidiques, ER3, 7 Quai Saint-Bernard, 75252 Paris cedex 05, France
| | - Viktor Bojović
- Ruđer Bošković Institute, Centre for Informatics and Computing, 10000 Zagreb, Croatia
| | - Juraj Simunić
- Faculty of Science, University of Split, 21000 Split, Croatia
| | - Davor Juretić
- Faculty of Science, University of Split, 21000 Split, Croatia
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18
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Characterization of selective antibacterial peptides by polarity index. INTERNATIONAL JOURNAL OF PEPTIDES 2012; 2012:585027. [PMID: 22611416 PMCID: PMC3348531 DOI: 10.1155/2012/585027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 12/16/2011] [Revised: 01/18/2012] [Accepted: 01/19/2012] [Indexed: 01/08/2023]
Abstract
In the recent decades, antibacterial peptides have occupied a strategic position for pharmaceutical drug applications and became subject of intense research activities since they are used to strengthen the immune system of all living organisms by protecting them from pathogenic bacteria. This work proposes a simple and easy statistical/computational method through a peptide polarity index measure by which an antibacterial peptide subgroup can be efficiently identified, that is, characterized by a high toxicity to bacterial membranes but presents a low toxicity to mammal cells. These peptides also have the feature not to adopt to an alpha-helicoidal structure in aqueous solution. The double-blind test carried out to the whole Antimicrobial Peptide Database (November 2011) showed an accuracy of 90% applying the polarity index method for the identification of such antibacterial peptide groups.
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19
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BASHA CAHMED. ROLE OF SHORT RANGE INTERACTIONS IN THE CHARGE OF MAXIMUM ADSORPTION. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2011. [DOI: 10.1142/s0219633607003453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Adsorption of solvent or organic compounds at a metal/interface is characterized by a wide spectrum of interactions governing the phenomenon under effective fields of order ≈ 107 V/cm . A generalized spin-1 Ising Hamiltonian was formulated by considering various interactions under molecular field approximation (MFA) to arrive at a three-state model of adsorption isotherm (i.e. the joint adsorption of two different organic compounds in the presence of solvent molecules). A general multi-state model was deduced heuristically and an expression for the charge [Formula: see text] at which maximum adsorption (θmax) occurs derived explicitly for a three-state site parity model that incorporates short-range interaction energies, functional dependence of permanent and induced dipole moments of the organic adsorbate, and the solvent and substrate interactions.
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Affiliation(s)
- C. AHMED BASHA
- Central Electrochemical Research Institute, Karaikudi 630006, India
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20
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Selective toxin–lipid membrane interactions of natural, haemolytic Scyphozoan toxins analyzed by surface plasmon resonance. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2010; 1798:1944-52. [DOI: 10.1016/j.bbamem.2010.06.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2010] [Revised: 06/02/2010] [Accepted: 06/15/2010] [Indexed: 11/18/2022]
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21
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Azevedo Calderon LD, Silva ADAE, Ciancaglini P, Stábeli RG. Antimicrobial peptides from Phyllomedusa frogs: from biomolecular diversity to potential nanotechnologic medical applications. Amino Acids 2010; 40:29-49. [PMID: 20526637 DOI: 10.1007/s00726-010-0622-3] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2010] [Accepted: 05/05/2010] [Indexed: 10/19/2022]
Abstract
Screening for new bioactive peptides in South American anurans has been pioneered in frogs of the genus Phyllomedusa. All frogs of this genus have venomous skin secretions, i.e., a complex mixture of bioactive peptides against potential predators and pathogens that presumably evolved in a scenario of predator-prey interaction and defense against microbial invasion. For every new anuran species studied new peptides are found, with homologies to hormones, neurotransmitters, antimicrobials, and several other peptides with unknown biological activity. From Vittorio Erspamer findings, this genus has been reported as a "treasure store" of bioactive peptides, and several groups focus their research on these species. From 1966 to 2009, more than 200 peptide sequences from different Phyllomedusa species were deposited in UniProt and other databases. During the last decade, the emergence of high-throughput molecular technologies involving de novo peptide sequencing via tandem mass spectrometry, cDNA cloning, pharmacological screening, and surface plasmon resonance applied to peptide discovery, led to fast structural data acquisition and the generation of peptide molecular libraries. Research groups on bioactive peptides in Brazil using these new technologies, accounted for the exponential increase of new molecules described in the last decade, much higher than in any previous decades. Recently, these secretions were also reported as a rich source of multiple antimicrobial peptides effective against multidrug resistant strains of bacteria, fungi, protozoa, and virus, providing instructive lessons for the development of new and more efficient nanotechnological-based therapies for infectious diseases treatment. Therefore, novel drugs arising from the identification and analysis of bioactive peptides from South American anuran biodiversity have a promising future role on nanobiotechnology.
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Affiliation(s)
- Leonardo de Azevedo Calderon
- Centro de Estudos de Biomoléculas Aplicadas a Medicina "Professor Dr. José Roberto Giglio" (CEBio), Núcleo de Saúde (NUSAU), Universidade Federal de Rondônia (UNIR), Porto Velho, RO, 76800-000, Brazil
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22
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Joanne P, Falord M, Chesneau O, Lacombe C, Castano S, Desbat B, Auvynet C, Nicolas P, Msadek T, El Amri C. Comparative study of two plasticins: specificity, interfacial behavior, and bactericidal activity. Biochemistry 2009; 48:9372-83. [PMID: 19711984 DOI: 10.1021/bi901222p] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A comparative study was designed to evaluate the staphylococcidal efficiency of two sequence-related plasticins from the dermaseptin superfamily we screened previously. Their bactericidal activities against Staphylococcus aureus as well as their chemotactic potential were investigated. The impact of the GraS/GraR two-component system involved in regulating resistance to cationic antimicrobial peptides (CAMPs) was evaluated. Membrane disturbing activity was quantified by membrane depolarization assays using the diS-C3 probe and by membrane integrity assays measuring beta-galactosidase activity with recombinant strain ST1065 reflecting compromised membranes and cytoplasmic leakage. Interactions of plasticins with membrane models composed of either zwitterionic lipids mimicking the S. aureus membrane of CAMP-resistant strains or anionic lipids mimicking the negative charge-depleted membrane of CAMP-sensitive strains were analyzed by jointed Brewster angle microscopy (BAM), polarization modulation infrared reflection absorption spectroscopy (PM-IRRAS), and differential scanning calorimetry (DSC) to yield detailed information about the macroscopic interfacial organization, in situ conformation, orientation of the peptides at the lipid-solvent interface, and lipid-phase disturbance. We clearly found evidence of distinct interfacial behaviors of plasticins we linked to the distribution of charges along the peptides and structural interconversion properties at the membrane interface. Our results also suggest that amidation might play a key role in GraS/GraR-mediated CAMP sensing at the bacterial surface.
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Affiliation(s)
- Pierre Joanne
- Universite Pierre et Marie Curie, ER3-Biogenese des signaux peptidiques, 75251 Paris Cedex 05, France
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23
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Chiou YL, Wang JJ, Chang LS. Effect of cholesterol on membrane-damaging activity of Naja nigricollis toxin γ toward phospholipid vesicles. Toxicon 2009; 54:772-8. [DOI: 10.1016/j.toxicon.2009.06.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2009] [Revised: 05/30/2009] [Accepted: 06/02/2009] [Indexed: 11/17/2022]
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24
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Auvynet C, Joanne P, Bourdais J, Nicolas P, Lacombe C, Rosenstein Y. Dermaseptin DA4, although closely related to dermaseptin B2, presents chemotactic and Gram-negative selective bactericidal activities. FEBS J 2009; 276:6773-86. [DOI: 10.1111/j.1742-4658.2009.07392.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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25
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Nicolas P, El Amri C. The dermaseptin superfamily: A gene-based combinatorial library of antimicrobial peptides. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2009; 1788:1537-50. [DOI: 10.1016/j.bbamem.2008.09.006] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2008] [Revised: 09/14/2008] [Accepted: 09/18/2008] [Indexed: 10/21/2022]
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26
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Conlon JM, Abdel-Wahab YHA, Flatt PR, Leprince J, Vaudry H, Jouenne T, Condamine E. A glycine-leucine-rich peptide structurally related to the plasticins from skin secretions of the frog Leptodactylus laticeps (Leptodactylidae). Peptides 2009; 30:888-92. [PMID: 19428765 DOI: 10.1016/j.peptides.2009.01.008] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2008] [Accepted: 01/09/2009] [Indexed: 11/23/2022]
Abstract
A glycine-leucine-rich peptide was isolated from norepinephrine-stimulated skin secretions of the Sante Fe frog Leptodactylus laticeps (Leptodactylidae) whose primary structure (Gly-Leu-Val-Asn-Gly-Leu-Leu-Ser-Ser-Val-Leu-Gly-Gly-Gly-Gln-Gly-Gly-Gly-Gly-Leu-Leu-Gly-Gly-Ile-Leu) contains the (GXXXG)(3) motif found in the plasticins, previously identified only in phyllomedusid frogs (Hylidae). Circular dichroism studies showed that the secondary structure of the peptide, termed plasticin-L1, was markedly solvent-dependent displaying a random coil conformation in water, a beta-sheet structure in methanol, and an alpha-helical conformation in 50% trifluoroethanol-water. A synthetic replicate of the peptide did not inhibit the growth of Escherichia coli or Staphylococcus aureus or lyse human erythrocytes at concentrations up to 500 microM. At relatively high concentrations (>or=1 microM), the peptide produced a significant (P<0.05), although modest (139% of basal rate at 3 microM), increase in the rate of glucose-induced release of insulin from rat clonal BRIN-BD11 beta cells without increasing the rate of release of lactate dehydrogenase. A peptide, termed ocellatin-L2 was also identified in the skin secretion that was identical to the previously described ocellatin-L1 except for the substitution Asn(23)-->Asp. Ocellatin-L2 was devoid of antimicrobial and hemolytic activity but also showed significant activity in stimulating insulin release from BRIN-BD11 cells (181% of basal rate at 3 microM).
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Affiliation(s)
- J Michael Conlon
- Department of Biochemistry, Faculty of Medicine and Health Sciences, United Arab Emirates University, Al-Ain, United Arab Emirates.
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27
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Kao PH, Lin SR, Wu MJ, Chang LS. Membrane-bound conformation and phospholipid components modulate membrane-damaging activity of Taiwan cobra cardiotoxins. Toxicon 2009; 53:512-8. [DOI: 10.1016/j.toxicon.2009.01.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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28
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Sousa JC, Berto RF, Gois EA, Fontenele-Cardi NC, Honório JER, Konno K, Richardson M, Rocha MFG, Camargo AACM, Pimenta DC, Cardi BA, Carvalho KM. Leptoglycin: a new Glycine/Leucine-rich antimicrobial peptide isolated from the skin secretion of the South American frog Leptodactylus pentadactylus (Leptodactylidae). Toxicon 2009; 54:23-32. [PMID: 19298834 DOI: 10.1016/j.toxicon.2009.03.011] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2008] [Revised: 02/26/2009] [Accepted: 03/03/2009] [Indexed: 01/06/2023]
Abstract
Antimicrobial peptides are components of innate immunity that is the first-line defense against invading pathogens for a wide range of organisms. Here, we describe the isolation, biological characterization and amino acid sequencing of a novel neutral Glycine/Leucine-rich antimicrobial peptide from skin secretion of Leptodactylus pentadactylus named leptoglycin. The amino acid sequence of the peptide purified by RP-HPLC (C(18) column) was deduced by mass spectrometric de novo sequencing and confirmed by Edman degradation: GLLGGLLGPLLGGGGGGGGGLL. Leptoglycin was able to inhibit the growth of Gram-negative bacteria Pseudomonas aeruginosa, Escherichia coli and Citrobacter freundii with minimal inhibitory concentrations (MICs) of 8 microM, 50 microM, and 75 microM respectively, but it did not show antimicrobial activity against Gram-positive bacteria (Staphylococcus aureus, Micrococcus luteus and Enterococcus faecalis), yeasts (Candida albicans and Candida tropicalis) and dermatophytes fungi (Microsporum canis and Trichophyton rubrum). No hemolytic activity was observed at the 2-200 microM range concentration. The amino acid sequence of leptoglycin with high level of glycine (59.1%) and leucine (36.4%) containing an unusual central proline suggests the existence of a new class of Gly/Leu-rich antimicrobial peptides. Taken together, these results suggest that this natural antimicrobial peptide could be a tool to develop new antibiotics.
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Affiliation(s)
- Juliana C Sousa
- Laboratório de Toxinologia e Farmacologia Molecular, Instituto Superior de Ciências Biomédicas, Universidade Estadual do Ceará, Fortaleza, CE 60.740-000, Brazil
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29
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Kao PH, Wu MJ, Chang LS. Membrane-bound conformation of Naja nigricollis toxin gamma affects its membrane-damaging activity. Toxicon 2008; 53:342-8. [PMID: 19101582 DOI: 10.1016/j.toxicon.2008.12.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2008] [Revised: 11/02/2008] [Accepted: 12/03/2008] [Indexed: 11/25/2022]
Abstract
To address whether the conformational events associated with the absorption of Naja nigricollis toxin gamma on water-lipid interface plays a vital role in its membrane-damaging activity, the present study is carried out. Membrane-damaging activity of toxin gamma on 1-palmitoyl-2-oleoyl-phosphatidylcholine (POPC)/1, 2-dimyristoyl-phosphatidic acid (DMPA) vesicles was approximately 13-fold of that on 1, 2-dipalmitoyl-phosphatidylcholine (DPPC)/DMPA vesicles, while the binding affinity of toxin gamma for POPC/DMPA was twofold of that for DPPC/DMPA. Time-resolved fluorescence, acrylamide quenching and Fourier transform infrared spectra showed that POPC/DMPA-bound toxin gamma and DPPC/DMPA-bound toxin gamma did not adopt the same conformation. Moreover, geometrical arrangement of toxin gamma in contact with POPC/DMPA vesicles was different from that with DPPC/DMPA vesicles as evidenced by N-(fluorescein-5-thiocarbamoyl)-1,2-dihexadecanoyl-phosphatidylcholine fluorescence enhancement and cross-linking of membrane-bound toxin gamma. Taken together, our data show that different membrane packing densities arising from phospholipid acyl chain affect membrane-bound conformation of toxin gamma, thus changing its membrane-damaging activity.
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Affiliation(s)
- Pei-Hsiu Kao
- Institute of Biomedical Sciences, National Sun Yat-Sen University-Kaohsiung Medical University Joint Research Center, National Sun Yat-Sen University, No 70, Lien-Hai Road, Kaohsiung 804, Taiwan, ROC
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30
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Amiche M, Ladram A, Nicolas P. A consistent nomenclature of antimicrobial peptides isolated from frogs of the subfamily Phyllomedusinae. Peptides 2008; 29:2074-82. [PMID: 18644413 DOI: 10.1016/j.peptides.2008.06.017] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2008] [Revised: 06/20/2008] [Accepted: 06/20/2008] [Indexed: 10/21/2022]
Abstract
A growing number of cationic antimicrobial peptides have been isolated from the skin of hylid frogs belonging to the Phyllomedusinae subfamily. The amino acid sequences of these peptides are currently located in several databases under identifiers with no consistent system of nomenclature to describe them. In order to provide a workable terminology for antimicrobial peptides from Phyllomedusid frogs, we have made a systematic effort to collect, analyze, and classify all the Phyllomedusid peptide sequences available in databases. We propose that frogs belonging to the Phyllomedusinae subfamily should be described by the species names set out in Amphibian Species of the World: http://research.amnh.org/herpetology/amphibia/index.php, American Museum of Natural History, New York, USA. Multiple alignments analysis of at least 80 antimicrobial peptides isolated from 12 Phyllomedusinae species were distributed in seven distinct peptide families including dermaseptin, phylloseptin, plasticin, dermatoxin, phylloxin, hyposin and orphan peptides, and will be considered as the name of the headgroup of each family. The parent peptide's name should be followed by the first upper letter of the species for orthologous peptides and publication date determines priority. For example, the abbreviation B for bicolor and H for hypochondrialis. When two species begin with the same letter, two letters in upper case should be used (the first letter followed by the second or the third letter and so on). For example, the abbreviation DI for distincta, DU for duellmani, VA for vaillanti and VN for vanzolinii. Paralogous peptides should bear letter(s) in upper case followed by numbers.
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Affiliation(s)
- Mohamed Amiche
- FRE 2852 CNRS/UPMC, Peptidome de la Peau des Amphibiens, F-75005 Paris, France.
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31
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Abbassi F, Oury B, Blasco T, Sereno D, Bolbach G, Nicolas P, Hani K, Amiche M, Ladram A. Isolation, characterization and molecular cloning of new temporins from the skin of the North African ranid Pelophylax saharica. Peptides 2008; 29:1526-33. [PMID: 18584916 DOI: 10.1016/j.peptides.2008.05.008] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2008] [Revised: 05/02/2008] [Accepted: 05/07/2008] [Indexed: 10/22/2022]
Abstract
Temporins are small antimicrobial peptides isolated from North American and Eurasian ranid frogs that are particularly active against Gram-positive bacteria. To date, no temporins have been characterized from North African frog species. We isolated three novel members of the temporin family, named temporin-1Sa (FLSGIVGMLGKLF(amide)), -1Sb (FLPIVTNLLSGLL(amide)), and -1Sc (FLSHIAGFLSNLF(amide)), from the skin of the Sahara frog Pelophylax (Rana) saharica originating from Tunisia. These temporins were identified by a combined mass spectrometry/molecular cloning approach. Temporin-1Sa was found to be highly active against Gram-positive and Gram-negative bacteria, yeasts and fungi (MIC=2-30 microM). To our knowledge, this is the first 13-residue member of the temporin family with a net charge of +2 that shows such broad-spectrum activity with particularly high potency on the clinically relevant Gram-negative strains, Escherichia coli (MIC=10 microM) and Pseudomonas aeruginosa (MIC=31 microM). Moreover, temporin-1Sa displays significant antiparasitic activity (IC50 approximately 20 microM) against the promastigote and amastigote stages of Leishmania infantum.
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Affiliation(s)
- Feten Abbassi
- FRE 2852, Peptidome de la Peau des Amphibiens, Université Pierre et Marie Curie/CNRS, Tour 43, 2 place Jussieu, 75251 Paris Cedex 05, France
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32
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Auvynet C, El Amri C, Lacombe C, Bruston F, Bourdais J, Nicolas P, Rosenstein Y. Structural requirements for antimicrobial versus chemoattractant activities for dermaseptin S9. FEBS J 2008; 275:4134-51. [DOI: 10.1111/j.1742-4658.2008.06554.x] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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33
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El Amri C, Bruston F, Joanne P, Lacombe C, Nicolas P. Intrinsic flexibility and structural adaptability of Plasticins membrane-damaging peptides as a strategy for functional versatility. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2007; 36:901-9. [PMID: 17622524 DOI: 10.1007/s00249-007-0199-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2007] [Revised: 05/16/2007] [Accepted: 05/28/2007] [Indexed: 10/23/2022]
Abstract
The Plasticins are a family of antimicrobial, 23-29-residue Gly-Leu-rich ortholog peptides from the frog skin that have very similar amino acid sequences, hydrophobicities, and amphipathicities but differ markedly in their conformational plasticity and spectrum of activity. The intrinsic flexibility and structural malleability of Plasticins modulate their ability to bind to and disrupt the bilayer membranes of prokaryotic and eukaryotic cells, and/or to reach intracellular targets, therefore, triggering functional versatility. The discussion is opened herein on several examples of other membrane-active peptides, like viral fusion peptides, cell-penetrating peptides, that are able to display antimicrobial activity. Hence, Plasticins could be regarded as models of multipotent membrane-active peptides guided by structural plasticity.
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Affiliation(s)
- C El Amri
- FRE 2852 Protéines: Biochimie Structurale et Fonctionnelle, Université Paris 6-CNRS, Peptidome de la peau d'amphibiens, tour 43, 4, Place Jussieu 75252, Paris Cedex 05, France.
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Bruston F, Lacombe C, Zimmermann K, Piesse C, Nicolas P, El Amri C. Structural malleability of plasticins: Preorganized conformations in solution and relevance for antimicrobial activity. Biopolymers 2007; 86:42-56. [PMID: 17309077 DOI: 10.1002/bip.20703] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Plasticins (23 long-residue glycine-leucine-rich dermaseptin-related peptides produced by the skin of South American hylids) have very similar amino acid sequences, hydrophobicities, and amphipathicities, but differ in their membrane-damaging properties and structurations (i.e. destabilized helix states, beta-hairpin, beta-sheet, and disordered states) at anionic and zwitterionic membrane interfaces. Structural malleability of plasticins in aqueous solutions together with parameters that may govern their ability to fold within beta-hairpin like structures were analyzed through circular dichroism and FTIR spectroscopic studies completed by molecular dynamics simulations in polar mimetic media. The goal of this study was to probe to which extent pre-existent peptide conformations, i.e. intrinsic "conformational landscape", may be responsible for variability in bioactive conformation and antimicrobial/hemolytic mechanisms of action of these peptides in relation with their various membrane disturbing properties. All plasticins present a turn region that does not always result in folding into a beta-hairpin shaped conformation. Residue at position 8 plays a major role in initiating the folding, while position 12 is not critical. Conformational stability has no major impact on antimicrobial efficacy. However, preformed beta-hairpin in solution may act as a conformational lock that prevents switch to alpha-helical structure. This lock lowers the antimicrobial efficiency and explains subtle differences in potencies of the most active antimicrobial plasticins.
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Affiliation(s)
- F Bruston
- FRE 2852 Protéines: Biochimie Structurale et Fonctionnelle, Université Paris 6-CNRS, Peptidome de la peau d'amphibiens, tour 43, 4, Place Jussieu 75252 Paris Cedex 05, France
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Thundimadathil J, Roeske RW, Guo L. Effect of membrane mimicking environment on the conformation of a pore-forming (xSxG)6 peptide. Biopolymers 2006; 84:317-28. [PMID: 16463358 DOI: 10.1002/bip.20470] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The mechanism of membrane interaction by beta-sheet peptides is important to understand fundamental principles of folding of beta-barrel proteins and various beta-amyloid proteins. Here, we examined the conformational characteristics of a porin-like channel forming (xSxG)(6) peptide in solution and membrane-mimicking environments (CD and ATR-IR) to understand the structural changes of the peptide during membrane association and channel formation. A comparison of the peptide conformations in different microenvironments showed that beta-sheet formation is enhanced in membrane-mimicking liposomes and SDS-micelles. The lipid-induced beta-sheet formation was confirmed by the formation of a characteristic beta-sheet structure on mixing a methanolic solution of the peptide (partially folded) with preformed liposomes. The amphipathicity of the peptide; increased hydrogen bonding, hydrophilicity, and reduction in dimensionality of the membrane surface; membrane-peptide interaction-forces; and presence of flexible glycines might facilitate beta-sheet formation in membranes. Though the CD spectra of both the peptide-bound and peptide-incorporated lipids are reminiscent of a beta-sheet structure, a significant variation in the peak positions of the two beta-sheet structures was noticed. The channel characteristics of (xSxG)(6) in the presence of low ionic strength solutions of NEt(3)BzCl and glucosammonium chloride are comparable to those reported under high ionic strength solutions. Altogether the data suggest that the channel formation by (xSxG)(6) proceeds via beta-sheet aggregate formation at the membrane surface, beta-sheet insertion, and rearrangement into a beta-barrel-like structure. The beta-barrel-like channel formation most likely arises from a sequence similarity to beta-barrel porins whereas the lipid-induced beta-sheet formation is governed by the above-mentioned factors.
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Affiliation(s)
- Jyothi Thundimadathil
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, 46202, USA
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Kamimori H, Unabia S, Thomas WG, Aguilar MI. Evaluation of the Membrane-binding Properties of the Proximal Region of the Angiotensin II Receptor (AT1A) Carboxyl Terminus by Surface Plasmon Resonance. ANAL SCI 2005; 21:171-4. [PMID: 15732479 DOI: 10.2116/analsci.21.171] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The proximal region of the angiotensin II receptor (AT1A) carboxyl-terminus (known as helix VIII) is important for receptor function. In this study, we used surface plasmon resonance (SPR) to examine the interaction of helix VIII-derived peptides with three model lipid membranes. The membrane-binding properties of these synthetic peptides, as well as a series of peptide analogues with modified amino acid sequences, could be explained by both amino acid sequence and kinetic binding data by SPR. The helix VIII peptides showed a higher affinity for lipid membranes that contained negatively charged phospholipid, rather than zwitterionic phospholipid. The findings of an SPR study may be useful for estimating the cooperative binding of intracellular receptor domains with G proteins and the components of the lipid bilayer.
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Affiliation(s)
- Hiroshi Kamimori
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria 3800, Australia.
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Abstract
The year 2004 represents a milestone for the biosensor research community: in this year, over 1000 articles were published describing experiments performed using commercially available systems. The 1038 papers we found represent an approximately 10% increase over the past year and demonstrate that the implementation of biosensors continues to expand at a healthy pace. We evaluated the data presented in each paper and compiled a 'top 10' list. These 10 articles, which we recommend every biosensor user reads, describe well-performed kinetic, equilibrium and qualitative/screening studies, provide comparisons between binding parameters obtained from different biosensor users, as well as from biosensor- and solution-based interaction analyses, and summarize the cutting-edge applications of the technology. We also re-iterate some of the experimental pitfalls that lead to sub-optimal data and over-interpreted results. We are hopeful that the biosensor community, by applying the hints we outline, will obtain data on a par with that presented in the 10 spotlighted articles. This will ensure that the scientific community at large can be confident in the data we report from optical biosensors.
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Affiliation(s)
- Rebecca L Rich
- Center for Biomolecular Interaction Analysis, University of Utah, Salt Lake City, UT 84132, USA
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