1
|
Vieira APGC, de Souza AN, Lima WG, Brito JCM, Simião DC, Gonçalves LVR, Cordeiro LPB, de Oliveira Scoaris D, Fernandes SOA, Resende JM, Bechinger B, Verly RM, de Lima ME. The Synthetic Peptide LyeTx I mn∆K, Derived from Lycosa erythrognatha Spider Toxin, Is Active against Methicillin-Resistant Staphylococcus aureus (MRSA) In Vitro and In Vivo. Antibiotics (Basel) 2024; 13:248. [PMID: 38534683 DOI: 10.3390/antibiotics13030248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2024] [Revised: 03/02/2024] [Accepted: 03/04/2024] [Indexed: 03/28/2024] Open
Abstract
The urgent global health challenge posed by methicillin-resistant Staphylococcus aureus (MRSA) infections demands effective solutions. Antimicrobial peptides (AMPs) represent promising tools of research of new antibacterial agents and LyeTx I mn∆K, a short synthetic peptide based on the Lycosa erythrognatha spider venom, is a good representative. This study focused on analyzing the antimicrobial activities of LyeTx I mn∆K, including minimum inhibitory and bactericidal concentrations, synergy and resensitization assays, lysis activity, the effect on biofilm, and the bacterial death curve in MRSA. Additionally, its characterization was conducted through isothermal titration calorimetry, dynamic light scattering, calcein release, and finally, efficacy in a mice wound model. The peptide demonstrates remarkable efficacy against planktonic cells (MIC 8-16 µM) and biofilms (>30% of inhibition) of MRSA, and outperforms vancomycin in terms of rapid bactericidal action and anti-biofilm effects. The mechanism involves significant membrane damage. Interactions with bacterial model membranes, including those with lysylphosphatidylglycerol (LysylPOPG) modifications, highlight the versatility and selectivity of this compound. Also, the peptide has the ability to sensitize resistant bacteria to conventional antibiotics, showing potential for combinatory therapy. Furthermore, using an in vivo model, this study showed that a formulated gel containing the peptide proved superior to vancomycin in treating MRSA-induced wounds in mice. Together, the results highlight LyeTx I mnΔK as a promising prototype for the development of effective therapeutic strategies against superficial MRSA infections.
Collapse
Affiliation(s)
- Ana Paula Gonçalves Coelho Vieira
- Faculdade de Saúde Santa Casa de Belo Horizonte, Programa de Pós-Graduação Stricto Sensu em Medicina e Biomedicina, Belo Horizonte 30150-240, Brazil
| | - Amanda Neves de Souza
- Departamento de Química, FACET, Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)-Campus JK, Diamantina 39100-000, Brazil
- Institut de Chimie, Centre National de la Recherche Scientifique, UMR7177, Université de Strasbourg, 67070 Strasbourg, France
| | - William Gustavo Lima
- Faculdade de Saúde Santa Casa de Belo Horizonte, Programa de Pós-Graduação Stricto Sensu em Medicina e Biomedicina, Belo Horizonte 30150-240, Brazil
| | | | - Daniela Carolina Simião
- Laboratório de Radioisótopos, Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia-Campus Pampulha, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte 31270-901, Brazil
| | - Lucas Vinícius Ribeiro Gonçalves
- Faculdade de Saúde Santa Casa de Belo Horizonte, Programa de Pós-Graduação Stricto Sensu em Medicina e Biomedicina, Belo Horizonte 30150-240, Brazil
| | - Lídia Pereira Barbosa Cordeiro
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte 31270-901, Brazil
| | | | - Simone Odília Antunes Fernandes
- Laboratório de Radioisótopos, Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia-Campus Pampulha, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte 31270-901, Brazil
| | - Jarbas Magalhães Resende
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte 31270-901, Brazil
| | - Burkhard Bechinger
- Institut de Chimie, Centre National de la Recherche Scientifique, UMR7177, Université de Strasbourg, 67070 Strasbourg, France
- Institut Universitaire de France (IUF), 75005 Paris, France
| | - Rodrigo Moreira Verly
- Departamento de Química, FACET, Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)-Campus JK, Diamantina 39100-000, Brazil
| | - Maria Elena de Lima
- Faculdade de Saúde Santa Casa de Belo Horizonte, Programa de Pós-Graduação Stricto Sensu em Medicina e Biomedicina, Belo Horizonte 30150-240, Brazil
| |
Collapse
|
2
|
You Y, Liu H, Zhu Y, Zheng H. Rational design of stapled antimicrobial peptides. Amino Acids 2023; 55:421-442. [PMID: 36781451 DOI: 10.1007/s00726-023-03245-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Accepted: 01/30/2023] [Indexed: 02/15/2023]
Abstract
The global increase in antimicrobial drug resistance has dramatically reduced the effectiveness of traditional antibiotics. Structurally diverse antibiotics are urgently needed to combat multiple-resistant bacterial infections. As part of innate immunity, antimicrobial peptides have been recognized as the most promising candidates because they comprise diverse sequences and mechanisms of action and have a relatively low induction rate of resistance. However, because of their low chemical stability, susceptibility to proteases, and high hemolytic effect, their usage is subject to many restrictions. Chemical modifications such as D-amino acid substitution, cyclization, and unnatural amino acid modification have been used to improve the stability of antimicrobial peptides for decades. Among them, a side-chain covalent bridge modification, the so-called stapled peptide, has attracted much attention. The stapled side-chain bridge stabilizes the secondary structure, induces protease resistance, and increases cell penetration and biological activity. Recent progress in computer-aided drug design and artificial intelligence methods has also been used in the design of stapled antimicrobial peptides and has led to the successful discovery of many prospective peptides. This article reviews the possible structure-activity relationships of stapled antimicrobial peptides, the physicochemical properties that influence their activity (such as net charge, hydrophobicity, helicity, and dipole moment), and computer-aided methods of stapled peptide design. Antimicrobial peptides under clinical trial: Pexiganan (NCT01594762, 2012-05-07). Omiganan (NCT02576847, 2015-10-13).
Collapse
Affiliation(s)
- YuHao You
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009, People's Republic of China
| | - HongYu Liu
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009, People's Republic of China
| | - YouZhuo Zhu
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009, People's Republic of China
| | - Heng Zheng
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009, People's Republic of China.
| |
Collapse
|
3
|
Utterström J, Barriga HMG, Holme MN, Selegård R, Stevens MM, Aili D. Peptide-Folding Triggered Phase Separation and Lipid Membrane Destabilization in Cholesterol-Rich Lipid Vesicles. Bioconjug Chem 2022; 33:736-746. [PMID: 35362952 PMCID: PMC9026255 DOI: 10.1021/acs.bioconjchem.2c00115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Liposome-based drug
delivery systems are widely used to improve
drug pharmacokinetics but can suffer from slow and unspecific release
of encapsulated drugs. Membrane-active peptides, based on sequences
derived or inspired from antimicrobial peptides (AMPs), could offer
means to trigger and control the release. Cholesterol is used in most
liposomal drug delivery systems (DDS) to improve the stability of
the formulation, but the activity of AMPs on cholesterol-rich membranes
tends to be very low, complicating peptide-triggered release strategies.
Here, we show a de novo designed AMP-mimetic peptide that efficiently
triggers content release from cholesterol-containing lipid vesicles
when covalently conjugated to headgroup-functionalized lipids. Binding
to vesicles induces peptide folding and triggers a lipid phase separation,
which in the presence of cholesterol results in high local peptide
concentrations at the lipid bilayer surface and rapid content release.
We anticipate that these results will facilitate the development of
peptide-based strategies for controlling and triggering drug release
from liposomal drug delivery systems.
Collapse
Affiliation(s)
- Johanna Utterström
- Laboratory of Molecular Materials, Division of Biophysics and Bioengineering, Department of Physics, Chemistry and Biology, SE-581 83 Linköping, Sweden
| | - Hanna M G Barriga
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | - Margaret N Holme
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | - Robert Selegård
- Laboratory of Molecular Materials, Division of Biophysics and Bioengineering, Department of Physics, Chemistry and Biology, SE-581 83 Linköping, Sweden
| | - Molly M Stevens
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, SE-171 77 Stockholm, Sweden.,Department of Materials, Department of Bioengineering and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, U.K
| | - Daniel Aili
- Laboratory of Molecular Materials, Division of Biophysics and Bioengineering, Department of Physics, Chemistry and Biology, SE-581 83 Linköping, Sweden
| |
Collapse
|
4
|
Schistocins: Novel antimicrobial peptides encrypted in the Schistosoma mansoni Kunitz Inhibitor SmKI-1. Biochim Biophys Acta Gen Subj 2021; 1865:129989. [PMID: 34389467 DOI: 10.1016/j.bbagen.2021.129989] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/30/2021] [Accepted: 08/06/2021] [Indexed: 02/06/2023]
Abstract
BACKGROUND Here we describe a new class of cryptides (peptides encrypted within a larger protein) with antimicrobial properties, named schistocins, derived from SmKI-1, a key protein in Shistosoma mansoni survival. This is a multi-functional protein with biotechnological potential usage as a therapeutic molecule in inflammatory diseases and to control schistosomiasis. METHODS We used our algorithm enCrypted, to perform an in silico proteolysis of SmKI-1 and a screening for potential antimicrobial activity. The selected peptides were chemically synthesized, tested in vitro and evaluated by both structural (CD, NMR) and biophysical (ITC) studies to access their structure-function relationship. RESULTS EnCrypted was capable of predicting AMPs in SmKI-1. Our biophysical analyses described a membrane-induced conformational change from random coil-to-α-helix and a peptide-membrane equilibrium for all schistocins. Our structural data allowed us to suggest a well-known mode of peptide-membrane interaction in which electrostatic attraction between the cationic peptides and anionic membranes results in the bilayer disordering. Moreover, the NMR exchange H/D data with the higher entropic contribution observed for the peptide-membrane interaction showed that shistocins have different orientations upon the membrane. CONCLUSIONS This work demonstrate the robustness for using the physicochemical features of predicted peptides in the identification of new bioactive cryptides besides the relevance of combining these analyses with biophysical methods to understand the peptide-membrane affinity and improve further algorithms. GENERAL SIGNIFICANCE Bioprospecting cryptides can be conducted through data mining of protein databases demonstrating the success of our strategy. The peptides-based agents derived from SmKI-1 might have high impact for system-biology and biotechnology.
Collapse
|
5
|
Li T, Li L, Du F, Sun L, Shi J, Long M, Chen Z. Activity and Mechanism of Action of Antifungal Peptides from Microorganisms: A Review. Molecules 2021; 26:molecules26113438. [PMID: 34198909 PMCID: PMC8201221 DOI: 10.3390/molecules26113438] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 06/01/2021] [Accepted: 06/03/2021] [Indexed: 12/20/2022] Open
Abstract
Harmful fungi in nature not only cause diseases in plants, but also fungal infection and poisoning when people and animals eat food derived from crops contaminated with them. Unfortunately, such fungi are becoming increasingly more resistant to traditional synthetic antifungal drugs, which can make prevention and control work increasingly more difficult to achieve. This means they are potentially very harmful to human health and lifestyle. Antifungal peptides are natural substances produced by organisms to defend themselves against harmful fungi. As a result, they have become an important research object to help deal with harmful fungi and overcome their drug resistance. Moreover, they are expected to be developed into new therapeutic drugs against drug-resistant fungi in clinical application. This review focuses on antifungal peptides that have been isolated from bacteria, fungi, and other microorganisms to date. Their antifungal activity and factors affecting it are outlined in terms of their antibacterial spectra and effects. The toxic effects of the antifungal peptides and their common solutions are mentioned. The mechanisms of action of the antifungal peptides are described according to their action pathways. The work provides a useful reference for further clinical research and the development of safe antifungal drugs that have high efficiencies and broad application spectra.
Collapse
Affiliation(s)
- Tianxi Li
- College of Animal Science & Veterinary Medicine, Shenyang Agricultural University, Shenyang 110866, China; (T.L.); (L.L.); (F.D.)
| | - Lulu Li
- College of Animal Science & Veterinary Medicine, Shenyang Agricultural University, Shenyang 110866, China; (T.L.); (L.L.); (F.D.)
| | - Fangyuan Du
- College of Animal Science & Veterinary Medicine, Shenyang Agricultural University, Shenyang 110866, China; (T.L.); (L.L.); (F.D.)
| | - Lei Sun
- College of Animal Husbandry and Veterinary Medicine, Jinzhou Medical University, Jinzhou 121001, China;
| | - Jichao Shi
- Liaoning Agricultural Development Service Center, Shenyang 110032, China;
| | - Miao Long
- College of Animal Science & Veterinary Medicine, Shenyang Agricultural University, Shenyang 110866, China; (T.L.); (L.L.); (F.D.)
- Correspondence: (M.L.); (Z.C.)
| | - Zeliang Chen
- College of Animal Science & Veterinary Medicine, Shenyang Agricultural University, Shenyang 110866, China; (T.L.); (L.L.); (F.D.)
- Correspondence: (M.L.); (Z.C.)
| |
Collapse
|
6
|
Cardoso P, Glossop H, Meikle TG, Aburto-Medina A, Conn CE, Sarojini V, Valery C. Molecular engineering of antimicrobial peptides: microbial targets, peptide motifs and translation opportunities. Biophys Rev 2021; 13:35-69. [PMID: 33495702 PMCID: PMC7817352 DOI: 10.1007/s12551-021-00784-y] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 01/07/2021] [Indexed: 02/07/2023] Open
Abstract
The global public health threat of antimicrobial resistance has led the scientific community to highly engage into research on alternative strategies to the traditional small molecule therapeutics. Here, we review one of the most popular alternatives amongst basic and applied research scientists, synthetic antimicrobial peptides. The ease of peptide chemical synthesis combined with emerging engineering principles and potent broad-spectrum activity, including against multidrug-resistant strains, has motivated intense scientific focus on these compounds for the past decade. This global effort has resulted in significant advances in our understanding of peptide antimicrobial activity at the molecular scale. Recent evidence of molecular targets other than the microbial lipid membrane, and efforts towards consensus antimicrobial peptide motifs, have supported the rise of molecular engineering approaches and design tools, including machine learning. Beyond molecular concepts, supramolecular chemistry has been lately added to the debate; and helped unravel the impact of peptide self-assembly on activity, including on biofilms and secondary targets, while providing new directions in pharmaceutical formulation through taking advantage of peptide self-assembled nanostructures. We argue that these basic research advances constitute a solid basis for promising industry translation of rationally designed synthetic peptide antimicrobials, not only as novel drugs against multidrug-resistant strains but also as components of emerging antimicrobial biomaterials. This perspective is supported by recent developments of innovative peptide-based and peptide-carrier nanobiomaterials that we also review.
Collapse
Affiliation(s)
- Priscila Cardoso
- School of Health and Biomedical Sciences, RMIT University, Melbourne, Australia.,School of Science, RMIT University, Melbourne, Australia
| | - Hugh Glossop
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | | | | | | | | | - Celine Valery
- School of Health and Biomedical Sciences, RMIT University, Melbourne, Australia
| |
Collapse
|
7
|
Membrane interactions of the anuran antimicrobial peptide HSP1-NH 2: Different aspects of the association to anionic and zwitterionic biomimetic systems. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2020; 1863:183449. [PMID: 32828849 DOI: 10.1016/j.bbamem.2020.183449] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 08/08/2020] [Accepted: 08/17/2020] [Indexed: 11/21/2022]
Abstract
Studies have suggested that antimicrobial peptides act by different mechanisms, such as micellisation, self-assembly of nanostructures and pore formation on the membrane surface. This work presents an extensive investigation of the membrane interactions of the 14 amino-acid antimicrobial peptide hylaseptin P1-NH2 (HSP1-NH2), derived from the tree-frog Hyla punctata, which has stronger antifungal than antibacterial potential. Biophysical and structural analyses were performed and the correlated results were used to describe in detail the interactions of HSP1-NH2 with zwitterionic and anionic detergent micelles and phospholipid vesicles. HSP1-NH2 presents similar well-defined helical conformations in both zwitterionic and anionic micelles, although NMR spectroscopy revealed important structural differences in the peptide N-terminus. 2H exchange experiments of HSP1-NH2 indicated the insertion of the most N-terminal residues (1-3) in the DPC-d38 micelles. A higher enthalpic contribution was verified for the interaction of the peptide with anionic vesicles in comparison with zwitterionic vesicles. The pore formation ability of HSP1-NH2 (examined by dye release assays) and its effect on the size and surface charge as well as on the lipid acyl chain ordering (evaluated by Fourier-transform infrared spectroscopy) of anionic phospholipid vesicles showed membrane disruption even at low peptide-to-phospholipid ratios, and the effect increases proportionately to the peptide concentration. On the other hand, these biophysical investigations showed that a critical peptide-to-phospholipid ratio around 0.6 is essential for promoting disruption of zwitterionic membranes. In conclusion, this study demonstrates that the binding process of the antimicrobial HSP1-NH2 peptide depends on the membrane composition and peptide concentration.
Collapse
|
8
|
Su J, Marrink SJ, Melo MN. Localization Preference of Antimicrobial Peptides on Liquid-Disordered Membrane Domains. Front Cell Dev Biol 2020; 8:350. [PMID: 32509780 PMCID: PMC7248343 DOI: 10.3389/fcell.2020.00350] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 04/20/2020] [Indexed: 01/14/2023] Open
Abstract
We performed coarse-grained simulations of the antimicrobial peptides Magainin-2, BP100, MSI-103, and MSI-78 on a phase-separated membrane to study their preference for the different domains. All the peptides displayed a clear preference for the liquid-disordered (Ld) phase over the liquid-ordered (Lo) one. For BP100, MSI-103, and MSI-78 there was a further preference of the peptides for the domain interface. The peptides' preference toward the disordered phase was shown to reflect a penalization of lipid-lipid interaction enthalpy in the Lo phase, when in the vicinity of peptides. Similar results were observed at the two studied concentrations, although Ld phase saturation at the higher concentration drove some of the peptide excess to the Lo phase. Magainin-2 and MSI-103 were found to dimerize, in agreement with available experimental data. Interestingly, at high concentrations of Magainin-2 toroidal pores spontaneously formed in the Ld phase. We performed additional simulations to characterize this phenomenon, which is likely related to Magainin-2's membranolytic action.
Collapse
Affiliation(s)
- Juanjuan Su
- Molecular Dynamics Group, Groningen Biomolecular Sciences and Biotechnology Institute and Zernike Institute for Advanced Materials, University of Groningen, Groningen, Netherlands
| | - Siewert J. Marrink
- Molecular Dynamics Group, Groningen Biomolecular Sciences and Biotechnology Institute and Zernike Institute for Advanced Materials, University of Groningen, Groningen, Netherlands
| | - Manuel N. Melo
- Multiscale Modeling Lab, Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal
| |
Collapse
|
9
|
Almeida MM, Perez KR, Faig A, Uhrich KE, Riske KA. Location of the Positive Charges in Cationic Amphiphiles Modulates Their Mechanism of Action against Model Membranes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:14117-14123. [PMID: 31589461 DOI: 10.1021/acs.langmuir.9b02606] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Synthetic cationic amphiphiles (CAms) with physicochemical properties similar to antimicrobial peptides are promising molecules in the search for alternative antibiotics to which pathogens cannot easily develop resistance. Here, we investigate two types of CAms based on tartaric acid and containing two hydrophobic chains (of 7 or 11 carbons) and two positive charges, located either at the end of the acyl chains (bola-like, B7 and B11) or at the tartaric acid backbone (gemini-like, G7 and G11). The interaction of the CAms with biomimetic membrane models (anionic and neutral liposomes) was studied with zeta potential and dynamic light scattering measurements, isothermal titration calorimetry, and a fluorescent-based leakage assay. We show that the type of molecule determines the mechanism of action of the CAms. Gemini-like molecules (G7 and G11) interact mainly via electrostatics (exothermic process) and reside in the external vesicle leaflet, altering substantially the vesicle surface potential but not causing significant membrane lysis. On the other hand, the interaction of bola-like CAms (B7 and B11) is endothermic and thus entropy-driven, and these molecules reach both membrane leaflets and cause substantial membrane permeabilization, likely after clustering of anionic lipids. The lytic ability is clearly higher against anionic membranes as compared with neutral membranes. Within each class of molecule, longer alkyl chains (i.e., B11 and G11) exhibit higher affinity and lytic ability. Overall, the molecule B11 exhibits a high potential as antimicrobial agent, since it has a high membrane affinity and causes substantial membrane permeabilization.
Collapse
Affiliation(s)
- Marcio M Almeida
- Departament of Biophysics , Universidade Federal de São Paulo , São Paulo , Brazil
| | - Katia R Perez
- Departament of Biophysics , Universidade Federal de São Paulo , São Paulo , Brazil
| | - Allison Faig
- Department of Chemistry and Chemical Biology , Rutgers University , Piscataway , New Jersey 08854 , United States
| | - Kathryn E Uhrich
- Department of Chemistry and Chemical Biology , Rutgers University , Piscataway , New Jersey 08854 , United States
- Department of Chemistry , University of California, Riverside , Riverside , California 92521 , United States
| | - Karin A Riske
- Departament of Biophysics , Universidade Federal de São Paulo , São Paulo , Brazil
| |
Collapse
|
10
|
Antimicrobial alumina nanobiostructures of disulfide- and triazole-linked peptides: Synthesis, characterization, membrane interactions and biological activity. Colloids Surf B Biointerfaces 2019; 177:94-104. [DOI: 10.1016/j.colsurfb.2019.01.052] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 01/24/2019] [Accepted: 01/25/2019] [Indexed: 11/18/2022]
|
11
|
Selectivity of Antimicrobial Peptides: A Complex Interplay of Multiple Equilibria. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1117:175-214. [DOI: 10.1007/978-981-13-3588-4_11] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
12
|
Nanobiostructure of fibrous-like alumina functionalized with an analog of the BP100 peptide: Synthesis, characterization and biological applications. Colloids Surf B Biointerfaces 2018; 163:275-283. [DOI: 10.1016/j.colsurfb.2018.01.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 12/11/2017] [Accepted: 01/02/2018] [Indexed: 12/17/2022]
|
13
|
Gusmão KAG, Dos Santos DM, Santos VM, Cortés ME, Reis PVM, Santos VL, Piló-Veloso D, Verly RM, de Lima ME, Resende JM. Ocellatin peptides from the skin secretion of the South American frog Leptodactylus labyrinthicus (Leptodactylidae): characterization, antimicrobial activities and membrane interactions. J Venom Anim Toxins Incl Trop Dis 2017; 23:4. [PMID: 28115922 PMCID: PMC5244724 DOI: 10.1186/s40409-017-0094-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 01/06/2017] [Indexed: 12/04/2022] Open
Abstract
Background The availability of antimicrobial peptides from several different natural sources has opened an avenue for the discovery of new biologically active molecules. To the best of our knowledge, only two peptides isolated from the frog Leptodactylus labyrinthicus, namely pentadactylin and ocellatin-F1, have shown antimicrobial activities. Therefore, in order to explore the antimicrobial potential of this species, we have investigated the biological activities and membrane interactions of three peptides isolated from the anuran skin secretion. Methods Three peptide primary structures were determined by automated Edman degradation. These sequences were prepared by solid-phase synthesis and submitted to activity assays against gram-positive and gram-negative bacteria and against two fungal strains. The hemolytic properties of the peptides were also investigated in assays with rabbit blood erythrocytes. The conformational preferences of the peptides and their membrane interactions have been investigated by circular dichroism spectroscopy and liposome dye release assays. Results The amino acid compositions of three ocellatins were determined and the sequences exhibit 100% homology for the first 22 residues (ocellatin-LB1 sequence). Ocellatin-LB2 carries an extra Asn residue and ocellatin-F1 extra Asn-Lys-Leu residues at C-terminus. Ocellatin-F1 presents a stronger antibiotic potential and a broader spectrum of activities compared to the other peptides. The membrane interactions and pore formation capacities of the peptides correlate directly with their antimicrobial activities, i.e., ocellatin-F1 > ocellatin-LB1 > ocellatin-LB2. All peptides acquire high helical contents in membrane environments. However, ocellatin-F1 shows in average stronger helical propensities. Conclusions The obtained results indicate that the three extra amino acid residues at the ocellatin-F1 C-terminus play an important role in promoting stronger peptide-membrane interactions and antimicrobial properties. The extra Asn-23 residue present in ocellatin-LB2 sequence seems to decrease its antimicrobial potential and the strength of the peptide-membrane interactions. Electronic supplementary material The online version of this article (doi:10.1186/s40409-017-0094-y) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Karla A G Gusmão
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG Brazil.,Instituto de Engenharia, Ciência e Tecnologia, Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM), Janaúba, MG Brazil
| | - Daniel M Dos Santos
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG Brazil
| | - Virgílio M Santos
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG Brazil
| | - María Esperanza Cortés
- Departamento de Odontologia Restauradora, Faculdade de Odontologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG Brazil
| | - Pablo V M Reis
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG Brazil
| | - Vera L Santos
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG Brazil
| | - Dorila Piló-Veloso
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG Brazil
| | - Rodrigo M Verly
- Departamento de Química, Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM), Diamantina, MG Brazil
| | - Maria Elena de Lima
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG Brazil
| | - Jarbas M Resende
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG Brazil
| |
Collapse
|
14
|
da Hora GCA, Archilha NL, Lopes JLS, Müller DM, Coutinho K, Itri R, Soares TA. Membrane negative curvature induced by a hybrid peptide from pediocin PA-1 and plantaricin 149 as revealed by atomistic molecular dynamics simulations. SOFT MATTER 2016; 12:8884-8898. [PMID: 27722742 DOI: 10.1039/c6sm01714b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Antimicrobial peptides (AMPs) are cationic peptides that kill bacteria with a broad spectrum of action, low toxicity to mammalian cells and exceptionally low rates of bacterial resistance. These features have led to considerable efforts in developing AMPs as an alternative antibacterial therapy. In vitro studies have shown that AMPs interfere with membrane bilayer integrity via several possible mechanisms, which are not entirely understood. We have performed the synthesis, membrane lysis measurements, and biophysical characterization of a novel hybrid peptide. These measurements show that PA-Pln149 does not form nanopores, but instead promotes membrane rupture. It causes fast rupture of the bacterial model membrane (POPG-rich) at concentrations 100-fold lower than that required for the disruption of mammalian model membranes (POPC-rich). Atomistic molecular dynamics (MD) simulations were performed for single and multiple copies of PA-Pln149 in the presence of mixed and pure POPC/POPG bilayers to investigate the concentration-dependent membrane disruption by the hybrid peptide. These simulations reproduced the experimental trend and provided a potential mechanism of action for PA-Pln149. It shows that the PA-Pln149 does not form nanopores, but instead promotes membrane destabilization through peptide aggregation and induction of membrane negative curvature with the collapse of the lamellar arrangement. The sequence of events depicted for PA-Pln149 may offer insights into the mechanism of action of AMPs previously shown to induce negative deformation of membrane curvature and often associated with peptide translocation via non-bilayer intermediate structures.
Collapse
Affiliation(s)
- G C A da Hora
- Departamento de Química Fundamental, Universidade Federal de Pernambuco, 50740-560 Cidade Universitária, Recife, Brazil.
| | - N L Archilha
- Instituto de Física, Universidade de São Paulo, 05508-090 Cidade Universitária, São Paulo, Brazil.
| | - J L S Lopes
- Instituto de Física, Universidade de São Paulo, 05508-090 Cidade Universitária, São Paulo, Brazil.
| | - D M Müller
- Departamento de Química Orgánica, Facultad de Bioquímica y Cs. Biológicas, Universidad Nacional del Litoral (U.N.L). Ciudad Universitaria, C.C.242, (C.P:3000) Santa Fe, Argentina
| | - K Coutinho
- Instituto de Física, Universidade de São Paulo, 05508-090 Cidade Universitária, São Paulo, Brazil.
| | - R Itri
- Instituto de Física, Universidade de São Paulo, 05508-090 Cidade Universitária, São Paulo, Brazil.
| | - T A Soares
- Departamento de Química Fundamental, Universidade Federal de Pernambuco, 50740-560 Cidade Universitária, Recife, Brazil. and Department of Chemistry, Umeå University, 90187 Umeå, Sweden
| |
Collapse
|
15
|
Nasir MN, Crowet JM, Lins L, Obounou Akong F, Haudrechy A, Bouquillon S, Deleu M. Interactions of sugar-based bolaamphiphiles with biomimetic systems of plasma membranes. Biochimie 2016; 130:23-32. [DOI: 10.1016/j.biochi.2016.04.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Accepted: 04/01/2016] [Indexed: 12/20/2022]
|
16
|
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]
|
17
|
Muñoz F, Caracciolo PC, Daleo G, Abraham GA, Guevara MG. Evaluation of in vitro cytotoxic activity of mono-PEGylated StAP3 ( Solanum tuberosum aspartic protease 3) forms. BIOTECHNOLOGY REPORTS (AMSTERDAM, NETHERLANDS) 2014; 3:1-7. [PMID: 28626641 PMCID: PMC5466107 DOI: 10.1016/j.btre.2014.05.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
StAP3 is a plant aspartic protease with cytotoxic activity toward a broad spectrum of pathogens, including potato and human pathogen microorganisms, and cancer cells, but not against human T cells, human red blood cells or plant cells. For this reason, StAP3 could be a promising and potential drug candidate for future therapies. In this work, the improvement of the performance of StAP3 was achieved by means of a modification with PEG. The separation of a mono-PEGylated StAP3 fraction was easily performed by gel filtration chromatography. The mono-PEGylated StAP3 fraction was studied in terms of in vitro antimicrobial activity, exhibiting higher antimicrobial activity against Fusarium solani spores and Bacillus cereus, but slightly lower activity against Escherichia coli than native protein. Such increase in antifungal activity has not been reported previously for a PEGylated plant protein. In addition, PEGylation did not affect the selective cytotoxicity of StAP3, since no hemolytic activity was observed.
Collapse
Key Words
- AMPPs, antimicrobial proteins and peptides
- ATCC, American Type Culture Collection
- Antimicrobial protein
- BSA, bovine serum albumin
- DTT, dithiothreitol
- PBS, phosphate buffered saline
- PDA, potato dextrose agar
- PEG, polyethylene glycol
- PEGylation
- Plant aspartic protease
- SDS, sodium dodecyl sulphate
- SDS-PAGE, sodium dodecyl sulfate polyacrylamide gel electrophoresis
- Selective cytotoxicity
- StAP3, Solanum tuberosum aspartic protease 3
- StAsp-PSI, plant-specific insert of potato aspartic protease
- hRBC, Fresh human red blood cells
- mPEG-SVA, succinimidyl valerate monomethoxy polyethylene glycol
Collapse
Affiliation(s)
- Fernando Muñoz
- Plant Biochemistry Laboratory, Biological Research Institute, IIB (UNMdP-CONICET), Funes 3250, 7600, Mar del Plata, Argentina
| | - Pablo C. Caracciolo
- Instituto de Investigaciones en Ciencia y Tecnología de Materiales, INTEMA (UNMdP-CONICET), Av. Juan B. Justo 4302, 7600, Mar del Plata, Argentina
| | - Gustavo Daleo
- Plant Biochemistry Laboratory, Biological Research Institute, IIB (UNMdP-CONICET), Funes 3250, 7600, Mar del Plata, Argentina
| | - Gustavo A. Abraham
- Instituto de Investigaciones en Ciencia y Tecnología de Materiales, INTEMA (UNMdP-CONICET), Av. Juan B. Justo 4302, 7600, Mar del Plata, Argentina
| | - M. Gabriela Guevara
- Plant Biochemistry Laboratory, Biological Research Institute, IIB (UNMdP-CONICET), Funes 3250, 7600, Mar del Plata, Argentina
| |
Collapse
|
18
|
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.
Collapse
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
| | | | | | | | | |
Collapse
|
19
|
Schmidt NW, Wong GCL. Antimicrobial peptides and induced membrane curvature: geometry, coordination chemistry, and molecular engineering. CURRENT OPINION IN SOLID STATE & MATERIALS SCIENCE 2013; 17:151-163. [PMID: 24778573 PMCID: PMC4000235 DOI: 10.1016/j.cossms.2013.09.004] [Citation(s) in RCA: 132] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Short cationic, amphipathic antimicrobial peptides are multi-functional molecules that have roles in host defense as direct microbicides and modulators of the immune response. While a general mechanism of microbicidal activity involves the selective disruption and permeabilization of cell membranes, the relationships between peptide sequence and membrane activity are still under investigation. Here, we review the diverse functions that AMPs collectively have in host defense, and show that these functions can be multiplexed with a membrane mechanism of activity derived from the generation of negative Gaussian membrane curvature. As AMPs preferentially generate this curvature in model bacterial cell membranes, the selective generation of negative Gaussian curvature provides AMPs with a broad mechanism to target microbial membranes. The amino acid constraints placed on AMPs by the geometric requirement to induce negative Gaussian curvature are consistent with known AMP sequences. This 'saddle-splay curvature selection rule' is not strongly restrictive so AMPs have significant compositional freedom to multiplex membrane activity with other useful functions. The observation that certain proteins involved in cellular processes which require negative Gaussian curvature contain domains with similar motifs as AMPs, suggests this rule may be applicable to other curvature-generating proteins. Since our saddle-splay curvature design rule is based upon both a mechanism of activity and the existing motifs of natural AMPs, we believe it will assist the development of synthetic antimicrobials.
Collapse
Affiliation(s)
- Nathan W. Schmidt
- Department of Bioengineering, Department of Chemistry and Biochemistry, California NanoSystems Institute, University of California, Los Angeles, California 90095, United States
| | - Gerard C. L. Wong
- Department of Bioengineering, Department of Chemistry and Biochemistry, California NanoSystems Institute, University of California, Los Angeles, California 90095, United States
| |
Collapse
|
20
|
Domingues TM, Mattei B, Seelig J, Perez KR, Miranda A, Riske KA. Interaction of the antimicrobial peptide gomesin with model membranes: a calorimetric study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:8609-8618. [PMID: 23755822 DOI: 10.1021/la401596s] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Gomesin is a potent cationic antimicrobial peptide (z = +6) isolated from the Brazilian spider Acanthoscurria gomesiana . The interaction of gomesin with large unilamellar vesicles composed of a 1:1 mixture of zwitterionic (1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine) and anionic (1-palmitoyl-2-oleoyl-sn-glycero-3-phospho-(1'-rac-glycerol) phospholipids is studied with isothermal titration calorimetry (ITC). In parallel, light scattering and optical microscopy are used to assess peptide-induced vesicle aggregation. The ability of gomesin to permeabilize the membrane is examined with fluorescence spectroscopy of the leakage of 5,6-carboxyfluorescein (CF). Vesicles coated with 3 mol % 1,2-dipalmitoyl-sn-glycero-3-phosphoethanolamine-N-[methoxy(polyethylene glycol)-2000] (PE-PEG) lipids are also investigated to assess the influence of peptide-induced vesicle aggregation in the activity of gomesin. The ITC and light scattering titrations are done in two ways: lipid into peptide and peptide into lipid injections. Although some differences arise between the two setups, the basic interaction of gomesin with anionic vesicles is preserved. A surface partition model combined with the Gouy-Chapman theory is put forward to fit the ITC results. The intrinsic binding constant of gomesin is found to be K ≈ 10(3) M(-1). The interaction of gomesin with anionic membranes is highly exothermic and enthalpy-driven. Binding of gomesin is virtually always accompanied by vesicle aggregation and changes in membrane permeability, leading to CF leakage. Addition of PE-PEG to the membrane strongly attenuates vesicle aggregation but does not significantly change the mode of action of gomesin. The results point to a strong interaction of gomesin with the membrane surface, causing membrane rupture without a deep penetration into the bilayer core.
Collapse
Affiliation(s)
- Tatiana M Domingues
- Departamento de Biofísica, Universidade Federal de São Paulo, São Paulo, Brazil
| | | | | | | | | | | |
Collapse
|
21
|
He Y, Lazaridis T. Activity determinants of helical antimicrobial peptides: a large-scale computational study. PLoS One 2013; 8:e66440. [PMID: 23776672 PMCID: PMC3680375 DOI: 10.1371/journal.pone.0066440] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Accepted: 05/09/2013] [Indexed: 12/14/2022] Open
Abstract
Antimicrobial peptides (AMPs), produced by a wide range of organisms, have attracted attention due to their potential use as novel antibiotics. The majority of these peptides are cationic and are thought to function by permeabilizing the bacterial membrane, either by making pores or by dissolving it ('carpet' model). A key hypothesis in the literature is that antimicrobial and hemolytic activity correlate with binding affinity to anionic and zwitterionic membranes, respectively. Here we test this hypothesis by using binding free energy data collected from the literature and theoretical binding energies calculated from implicit membrane models for 53 helical AMPs. We indeed find a correlation between binding energy and biological activity, depending on membrane anionic content: antibacterial activity correlates best with transfer energy to membranes with anionic lipid fraction higher than 30% and hemolytic activity correlates best with transfer energy to a 10% anionic membrane. However, the correlations are weak, with correlation coefficient up to 0.4. Weak correlations of the biological activities have also been found with other physical descriptors of the peptides, such as surface area occupation, which correlates significantly with antibacterial activity; insertion depth, which correlates significantly with hemolytic activity; and structural fluctuation, which correlates significantly with both activities. The membrane surface coverage by many peptides at the MIC is estimated to be much lower than would be required for the 'carpet' mechanism. Those peptides that are active at low surface coverage tend to be those identified in the literature as pore-forming. The transfer energy from planar membrane to cylindrical and toroidal pores was also calculated for these peptides. The transfer energy to toroidal pores is negative in almost all cases while that to cylindrical pores is more favorable in neutral than in anionic membranes. The transfer energy to pores correlates with the deviation from predictions of the 'carpet' model.
Collapse
Affiliation(s)
- Yi He
- Department of Chemistry, City College of New York, New York, New York, United States of America
| | | |
Collapse
|
22
|
Balakrishnan VS, Vad BS, Otzen DE. Novicidin's membrane permeabilizing activity is driven by membrane partitioning but not by helicity: a biophysical study of the impact of lipid charge and cholesterol. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2013; 1834:996-1002. [PMID: 23562965 DOI: 10.1016/j.bbapap.2013.03.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2012] [Revised: 03/05/2013] [Accepted: 03/25/2013] [Indexed: 12/11/2022]
Abstract
We have investigated the interactions between the antimicrobial peptide Novicidin (Nc) and vesicles containing the phospholipid DOPC, with various amounts of DOPG and cholesterol using circular dichroism spectroscopy, calcein release, equilibrium dialysis and isothermal titration calorimetry. Nc adopts a random coil structure in the absence of lipids and in the presence of vesicles containing 100% DOPC. Lipids with 25-40% DOPG induce the highest level of helicity in Nc; higher DOPG levels lead to lower helicity levels and an altered tertiary arrangement of the peptide. However, the ability of Nc to permeabilize vesicles correlates not with helicity but rather with its overall membrane affinity, which is enthalpically favorable but opposed by entropy. Permeabilization declines with increasing mole percentage PG. Changes in helicity correlate with changes in enthalpy, reflecting the enthalpy of helix formation, but not with affinity. There is also a large favorable enthalpic interaction between Nc and lipids in the absence of negative charge and structural changes. Cholesterol slightly reduces membrane permeabilization but has little effect on Nc affinity and secondary structure, and probably protects the membrane by inducing the liquid ordered state. We conclude that helicity is not a prerequisite for activity, and charge-charge interactions are not the only major driving force for AMP interactions with membranes. Our data are compatible with a model in which a superficial binding mode with a large membrane surface binding area per peptide is more efficient than a more intimate embedding within the membrane environment.
Collapse
Affiliation(s)
- Vijay S Balakrishnan
- Department of Molecular Biology and Genetics, Aarhus University, Aarhus C, Denmark
| | | | | |
Collapse
|
23
|
Oliveira F, Denadai A, Guerra L, Fulgêncio F, Windmöller D, Santos G, Fernandes N, Yoshida M, Donnici C, Magalhães W, Machado J. Positronium formation studies in crystalline molecular complexes: Triphenylphosphine oxide – Acetanilide. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2012.12.032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
24
|
Paiva AD, de Oliveira MD, de Paula SO, Baracat-Pereira MC, Breukink E, Mantovani HC. Toxicity of bovicin HC5 against mammalian cell lines and the role of cholesterol in bacteriocin activity. MICROBIOLOGY-SGM 2012; 158:2851-2858. [PMID: 22956757 DOI: 10.1099/mic.0.062190-0] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Bacteriocins are ribosomally synthesized antimicrobial peptides produced by Bacteria and some Archaea. The assessment of the toxic potential of antimicrobial peptides is important in order to apply these peptides on an industrial scale. The aim of the present study was to investigate the in vitro cytotoxic and haemolytic potential of bovicin HC5, as well as to determine whether cholesterol influences bacteriocin activity on model membranes. Nisin, for which the mechanism of action is well described, was used as a reference peptide in our assays. The viability of three distinct eukaryotic cell lines treated with bovicin HC5 or nisin was analysed by using the MTT assay and cellular morphological changes were determined by light microscopy. The haemolytic potential was evaluated by using the haemoglobin liberation assay and the role of cholesterol on bacteriocin activity was examined by using model membranes composed of DOPC (1,2-dioleoyl-sn-glycero-3-phosphocholine) and DPoPC (1,2-dipalmitoyl-sn-glycero-3-phosphocholine). The IC(50) of bovicin HC5 and nisin against Vero cells was 65.42 and 13.48 µM, respectively. When the MTT assay was performed with MCF-7 and HepG2 cells, the IC(50) obtained for bovicin HC5 was 279.39 and 289.30 µM, respectively, while for nisin these values were 105.46 and 112.25 µM. The haemolytic activity of bovicin HC5 against eukaryotic cells was always lower than that determined for nisin. The presence of cholesterol did not influence the activity of either bacteriocin on DOPC model membranes, but nisin showed reduced carboxyfluorescein leakage in DPoPC membranes containing cholesterol. In conclusion, bovicin HC5 only exerted cytotoxic effects at concentrations that were greater than the concentration needed for its biological activity, and the presence of cholesterol did not affect its interaction with model membranes.
Collapse
Affiliation(s)
- Aline Dias Paiva
- Departamento de Microbiologia, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | | | | | | | - Eefjan Breukink
- Department Biochemistry of Membranes, Utrecht University, Utrecht, The Netherlands
| | | |
Collapse
|
25
|
Francois-Moutal L, Maniti O, Marcillat O, Granjon T. New insights into lipid-Nucleoside Diphosphate Kinase-D interaction mechanism: protein structural changes and membrane reorganisation. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2012; 1828:906-15. [PMID: 22974817 DOI: 10.1016/j.bbamem.2012.08.023] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2012] [Revised: 08/18/2012] [Accepted: 08/28/2012] [Indexed: 10/27/2022]
Abstract
Nucleoside Diphosphate Kinases (NDPKs) have long been considered merely as housekeeping enzymes. The discovery of the NME1 gene, an anti-metastatic gene coding for NDPK-A, led the scientific community to re-evaluate their role in the cell. It is now well established that the NDPK family is more complex than what was first thought, and despite the increasing amount of evidence suggesting the multifunctional role of nm23/NDPKs, the specific functions of each family member are still elusive. Among these isoforms, NDPK-D is the only one to present a mitochondria-targeting sequence. It has recently been shown that this protein is able to bind and cross-link with mitochondrial membranes, suggesting that NDPK-D can mediate contact sites and contributes to the mitochondrial intermembrane space structuring. To better understand the influence of NDPK-D on mitochondrial lipid organisation, we analysed its behaviour in different lipid environments. We found that NDPK-D not only interacts with CL or anionic lipids, but is also able to bind in a non negligible manner to zwitterionic PC. NDPK-D alters membrane organisation in terms of fluidity, hydration and lipid clustering, effects which depend on lipid structure. Changes in the protein structure after lipid binding were evidenced, both by fluorescence and infrared spectroscopy, regardless of membrane composition. Taking into account all these elements, a putative mechanism of interaction between NDPK-D and zwitterionic or anionic lipids was proposed.
Collapse
Affiliation(s)
- L Francois-Moutal
- Université de Lyon, Université Lyon 1, CNRS, UMR 5246, Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, IMBL, 43 Bd du 11 Novembre 1918 F-69622 Villeurbanne, France
| | | | | | | |
Collapse
|
26
|
Brender JR, McHenry AJ, Ramamoorthy A. Does cholesterol play a role in the bacterial selectivity of antimicrobial peptides? Front Immunol 2012; 3:195. [PMID: 22822405 PMCID: PMC3398343 DOI: 10.3389/fimmu.2012.00195] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Accepted: 06/21/2012] [Indexed: 12/12/2022] Open
Affiliation(s)
- Jeffrey R Brender
- Biophysics and Department of Chemistry, University of Michigan Ann Arbor, MI, USA
| | | | | |
Collapse
|
27
|
Positronium formation studies in solid molecular complexes: Triphenylphosphine oxide–triphenylmethanol. J Mol Struct 2012. [DOI: 10.1016/j.molstruc.2012.03.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
28
|
Muñoz F, Palomares-Jerez MF, Daleo G, Villalaín J, Guevara MG. Cholesterol and membrane phospholipid compositions modulate the leakage capacity of the swaposin domain from a potato aspartic protease (StAsp-PSI). Biochim Biophys Acta Mol Cell Biol Lipids 2011; 1811:1038-44. [DOI: 10.1016/j.bbalip.2011.08.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2011] [Revised: 07/08/2011] [Accepted: 08/03/2011] [Indexed: 12/26/2022]
|
29
|
Bechinger B, Resende JM, Aisenbrey C. The structural and topological analysis of membrane-associated polypeptides by oriented solid-state NMR spectroscopy: established concepts and novel developments. Biophys Chem 2010; 153:115-25. [PMID: 21145159 DOI: 10.1016/j.bpc.2010.11.002] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2010] [Revised: 11/05/2010] [Accepted: 11/05/2010] [Indexed: 10/18/2022]
Abstract
Solid-state NMR spectroscopy is a powerful technique for the investigation of membrane-associated peptides and proteins as well as their interactions with lipids, and a variety of conceptually different approaches have been developed for their study. The technique is unique in allowing for the high-resolution investigation of liquid disordered lipid bilayers representing well the characteristics of natural membranes. Whereas magic angle solid-state NMR spectroscopy follows approaches that are related to those developed for solution NMR spectroscopy the use of static uniaxially oriented samples results in angular constraints which also provide information for the detailed analysis of polypeptide structures. This review introduces this latter concept theoretically and provides a number of examples. Furthermore, ongoing developments combining solid-state NMR spectroscopy with information from solution NMR spectroscopy and molecular modelling as well as exploratory studies using dynamic nuclear polarization solid-state NMR will be presented.
Collapse
Affiliation(s)
- Burkhard Bechinger
- Université de Strasbourg/CNRS, UMR7177, Institut de Chimie, 4 Rue Blaise Pascal, 67070 Strasbourg, France.
| | | | | |
Collapse
|
30
|
Wu G, Wu H, Fan X, Zhao R, Li X, Wang S, Ma Y, Shen Z, Xi T. Selective toxicity of antimicrobial peptide S-thanatin on bacteria. Peptides 2010; 31:1669-73. [PMID: 20600431 DOI: 10.1016/j.peptides.2010.06.009] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2010] [Revised: 06/13/2010] [Accepted: 06/14/2010] [Indexed: 11/18/2022]
Abstract
S-thanatin, an analog of thanatin, was synthesized by substituting the 15th amino acid of threonine with serine, which showed a broad antimicrobial activity against bacteria. We reported earlier that membrane phospholipid was found to be the target for S-thanatin with different mechanism from other antimicrobial peptides. In this study, we have performed its structural characterization by circular dichroism (CD) spectroscopy. The CD analysis showed that S-thanatin retained its overall conformation beta-sheet in aqueous buffer, beta-turn in 50% trifluoroethanol (TFE) and beta-hairpin in 0.4 mM POPC-LUVs. In hemolysis assay, S-thanatin exhibited low hemolytic activity and bacteria selectivity. We investigated the effect of the presence of 33 mol percent cholesterol on the interactions of the antimicrobial peptide S-thanatin with phosphatidylcholine (PC) model membrane systems. The results showed that S-thanatin was more potent at disrupting cholesterol-free bacterial than cholesterol-containing eukaryotic membranes. Thus, in all respects, fluorescence dye leakage experiments indicated that cholesterol inhibited the S-thanatin-induced permeabilization of PC vesicles. Finally, flow cytometry was used to monitor changes in bacterial cell membrane potential and cell membrane integrity, with specific fluorescent dyes DiBAC(4)(3) and PI. Adding the respiratory poison CCCP seemed to prevent peptide-induced membrane damage, which suggested that S-thanatin acted at the metabolic level on respiratory chain. These findings might explain why S-thanatin was selective toxicity towards bacteria, but low toxicity towards erythrocytes. It might be due to three factors at least: electrostatic interaction (namely anionic phospholipids); cholesterol; respiratory chain.
Collapse
Affiliation(s)
- Guoqiu Wu
- Center of Clinical Laboratory Medicine of Zhongda Hospital, Southeast University, Nanjing 210009, PR China.
| | | | | | | | | | | | | | | | | |
Collapse
|
31
|
dos Santos G, Thomé C, Ferreira G, Yoneda J, Nobre T, Daghastanli K, Scheucher P, Gimenes-Teixeira H, Constantino M, de Oliveira K, Faça V, Falcão R, Greene L, Rego E, Ciancaglini P. Interaction of 10-(octyloxy) decyl-2-(trimethylammonium) ethyl phosphate with mimetic membranes and cytotoxic effect on leukemic cells. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2010; 1798:1714-23. [DOI: 10.1016/j.bbamem.2010.05.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2010] [Revised: 04/21/2010] [Accepted: 05/12/2010] [Indexed: 01/01/2023]
|
32
|
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.
Collapse
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
| | | | | | | |
Collapse
|
33
|
da Silva Malheiros P, Daroit DJ, Brandelli A. Food applications of liposome-encapsulated antimicrobial peptides. Trends Food Sci Technol 2010. [DOI: 10.1016/j.tifs.2010.03.003] [Citation(s) in RCA: 153] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
34
|
Survey of the year 2008: applications of isothermal titration calorimetry. J Mol Recognit 2010; 23:395-413. [DOI: 10.1002/jmr.1025] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
|
35
|
Li F, Yang R, Weng Y, Tang X. Preparation and evaluation of lyophilized liposome-encapsulated bufadienolides. Drug Dev Ind Pharm 2010; 35:1048-58. [PMID: 19365782 DOI: 10.1080/03639040902762987] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
OBJECTIVE The objective of this study was to prepare bufadienolides-loaded liposome (BU-lipo). METHODS The BU-lipo was prepared by a thin-film hydration method involving sonication and lyophilization procedures. The lyophilized BU-lipo was characterized with regard to the appearance and particle size by scanning electron microscopy, transmission electron microscopy, and photon correlation spectroscopy. The entrapment efficiency (EE) of BU-lipo was evaluated by the microdialysis technique. RESULTS In the optimal formulation, Lipoid E-80 and the mass ratio of cholesterol to lipid were fixed at 1.25% and 0.05. The media diameters of BU-lipo before and after lyophilization were about 100 nm, and the EEs of bufalin (B), cinobufagin (C), and resibufogenin (R) were 86.5%, 90.0%, and 92.1%, respectively. In the EE study, the probe recoveries of B, C, and R were 21.53 +/- 1.14%, 19.49 +/- 1.34%, and 20.19 +/- 1.25%, respectively, at a flow rate of 4 microL/min by the gain method. The EE of BU-lipo evaluated by microdialysis and ultrafiltration were equivalent. CONCLUSION The lyophilized BU-lipo contained trehalose (10%) was stable up to 6 months in a desiccator under 2 degrees C-8 degrees C. The microdialysis technique has a wide application perspective in the investigation of the free-drug concentration of microcarrier systems.
Collapse
Affiliation(s)
- Fang Li
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, PR China
| | | | | | | |
Collapse
|
36
|
Mehanna MM, Elmaradny HA, Samaha MW. Ciprofloxacin liposomes as vesicular reservoirs for ocular delivery: formulation, optimization, and in vitro characterization. Drug Dev Ind Pharm 2009; 35:583-93. [PMID: 19031311 DOI: 10.1080/03639040802468024] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Management of extraocular diseases is mainly limited by the inability to provide long-term drug delivery without avoiding the systemic drug exposure and/or affecting the intraocular structures and poor availability of drugs, which may be overcome by prolonging the contact time with the ocular system, for instance with liposomes. Development and optimization of reverse phase evaporation ciprofloxacin (CPF) HCl liposomes for ocular drug delivery was carried out using a 2(5) full factorial design based on five independent variables. The effects of the studied parameters on drug entrapment efficiency (EE), particle size, and percentage of drug released after 1 and 10 h were investigated. The results obtained pointed out that the molar concentration of cholesterol was the predominant factor that increased the EE% of the drug and the particle size responses. The percentage of drug released after 1 h was significantly controlled by the initial CPF concentration while that after 10 h was controlled by molar cholesterol concentration. The designed liposomes had average particle sizes that ranged from 2.5 to 7.23 microm. In addition, liposomes revealed a fast release during the first hour followed by a more gradual drug release during the 24-h period according to Higuchi diffusion model.
Collapse
Affiliation(s)
- Mohammed M Mehanna
- Industrial Pharmacy Department, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt.
| | | | | |
Collapse
|
37
|
Verly RM, de Moraes CM, Resende JM, Aisenbrey C, Bemquerer MP, Piló-Veloso D, Valente AP, Almeida FCL, Bechinger B. Structure and membrane interactions of the antibiotic peptide dermadistinctin K by multidimensional solution and oriented 15N and 31P solid-state NMR spectroscopy. Biophys J 2009; 96:2194-203. [PMID: 19289046 DOI: 10.1016/j.bpj.2008.11.063] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2008] [Revised: 10/18/2008] [Accepted: 11/06/2008] [Indexed: 01/05/2023] Open
Abstract
DD K, a peptide first isolated from the skin secretion of the Phyllomedusa distincta frog, has been prepared by solid-phase chemical peptide synthesis and its conformation was studied in trifluoroethanol/water as well as in the presence of sodium dodecyl sulfate and dodecylphosphocholine micelles or small unilamellar vesicles. Multidimensional solution NMR spectroscopy indicates an alpha-helical conformation in membrane environments starting at residue 7 and extending to the C-terminal carboxyamide. Furthermore, DD K has been labeled with (15)N at a single alanine position that is located within the helical core region of the sequence. When reconstituted into oriented phosphatidylcholine membranes the resulting (15)N solid-state NMR spectrum shows a well-defined helix alignment parallel to the membrane surface in excellent agreement with the amphipathic character of DD K. Proton-decoupled (31)P solid-state NMR spectroscopy indicates that the peptide creates a high level of disorder at the level of the phospholipid headgroup suggesting that DD K partitions into the bilayer where it severely disrupts membrane packing.
Collapse
Affiliation(s)
- Rodrigo M Verly
- Departamento de Química Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | | | | | | | | | | | | | | | |
Collapse
|