1
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Adak A, Castelletto V, Mendes B, Barrett G, Seitsonen J, Hamley IW. Chirality and pH Influence the Self-Assembly of Antimicrobial Lipopeptides with Diverse Nanostructures. ACS APPLIED BIO MATERIALS 2024; 7:5553-5565. [PMID: 39042039 PMCID: PMC11337160 DOI: 10.1021/acsabm.4c00664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Revised: 07/15/2024] [Accepted: 07/18/2024] [Indexed: 07/24/2024]
Abstract
Chirality plays a crucial role in the self-assembly of biomolecules in nature. Peptides show chirality-dependent conformation and self-assembly. Lipidation of peptides occurs in vivo and has recently been exploited in designed conjugates to drive self-assembly and enhance bioactivity. Here, a library of pH-responsive homochiral and heterochiral lipidated tripeptides has been designed. The designed lipopeptides comprise homochiral C16-YKK or C16-WKK (where all the amino acids are l-isomers), and two heterochiral conjugates C16-Ykk and C16-Wkk (where the two lysines are d-isomers). The self-assembly of all the synthesized lipopeptides in aqueous solution was examined using a combination of spectroscopic methods along with cryogenic-transmission electron microscopy (cryo-TEM) and small-angle X-ray scattering (SAXS). Interestingly, it was observed that at acidic pH all the lipopeptides self-assemble into micelles, whereas at basic pH the homochiral lipopeptides self-assemble into nanofibers, whereas the heterochiral lipopeptides self-assemble into nanotapes and nanotubes. A pH switch was demonstrated using a thioflavin T fluorescence probe of β-sheet structure present in the extended structures at pH 8. We demonstrate that both chirality and pH in lipopeptides influence the self-assembly behavior of the model tripeptides, which also show promising bioactivity. Good cytocompatibility is observed in hemolytic assays and antimicrobial activity against both Gram-negative and Gram-positive bacteria is shown through the determination of minimum inhibition concentration (MIC) and minimum bactericidal concentration (MBC) values and live/dead bacteria staining assay.
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Affiliation(s)
- Anindyasundar Adak
- School
of Chemistry, Pharmacy and Food Biosciences, University of Reading, Whiteknights, Reading RG6 6AD, U.K.
| | - Valeria Castelletto
- School
of Chemistry, Pharmacy and Food Biosciences, University of Reading, Whiteknights, Reading RG6 6AD, U.K.
| | - Bruno Mendes
- School
of Biological Sciences, University of Reading, Whiteknights, Reading RG6 6AH, U.K.
| | - Glyn Barrett
- School
of Biological Sciences, University of Reading, Whiteknights, Reading RG6 6AH, U.K.
| | - Jani Seitsonen
- Nanomicroscopy
Center, Aalto University, Puumiehenkuja 2, FIN-02150 Espoo, Finland
| | - Ian W. Hamley
- School
of Chemistry, Pharmacy and Food Biosciences, University of Reading, Whiteknights, Reading RG6 6AD, U.K.
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2
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Mendanha K, Colherinhas G. Exploring How System Dimensions and Periodic Boundary Conditions Influence the Molecular Dynamics Simulation of A 6H Peptide Self-Assembly Nanostructures. J Phys Chem B 2024; 128:6853-6865. [PMID: 38981040 PMCID: PMC11264264 DOI: 10.1021/acs.jpcb.4c03043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2024] [Revised: 07/01/2024] [Accepted: 07/02/2024] [Indexed: 07/11/2024]
Abstract
This work presents a study on the effects of periodic boundary conditions (PBC) on the energetic/structural properties and hydrogen bond dynamics (HB) using molecular dynamics (MD) simulations of peptide membranes composed of alanine and histidine. Our results highlight that simulations using small surface areas for the peptide membrane may result in nonconvergent values for membrane properties, which are only observed in regions simulated at a certain distance from the PBCs. Specifically, regarding hydrogen bonds, a property pervasive in peptide membranes, our findings indicate a significant increase in the lifetime of these interactions, reaching values ∼19% higher when observed in structures free from PBCs. For peptide mobility in these nanomembranes, our results compare regions simulated directly under the influence of PBCs with regions free from these conditions, emphasizing greater mobility of amino acid psi/phi angles in the latter model.
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Affiliation(s)
- Karinna Mendanha
- Instituto de Física, Universidade Federal de Goiás, Goiânia, GO 74690-900, Brazil
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3
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Ganesan V, Priya MH. Revealing the Key Packing Features Determining the Stability of Peptide Bilayer Membrane. ACS APPLIED BIO MATERIALS 2024; 7:564-578. [PMID: 36847611 DOI: 10.1021/acsabm.2c00949] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
Short surfactant-like amphiphilic peptide, A3K, resembling a surfactant with a hydrophobic tail (A3) and a polar headgroup (K), is experimentally determined to form a membrane. Although the peptides are known to exist as β-strands, the exact packing architecture stabilizing the membrane is unknown. Earlier simulation studies have reported successful packing configurations through trial and error. In this work, we present a systematic protocol to identify the best peptide configurations for different packing patterns. The influence of stacking peptides in square and hexagonal packing geometry with the neighboring peptides in parallel and antiparallel orientations was explored. The best peptide configurations were determined from the free energy of bringing 2-4 peptides together as a bundle that can be stacked into a membrane. The stability of the assembled bilayer membrane was further investigated through molecular dynamics simulation. The role of peptide tilting, interpeptide distance, the nature and the extent of interactions, and the conformational degrees of freedom on the stability of the membrane is discussed. The consistency with the experimental findings suggests hexagonal antiparallel as the most relevant molecular architecture.
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Affiliation(s)
- Vidhya Ganesan
- Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai 600 036, India
| | - M Hamsa Priya
- Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai 600 036, India
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4
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Hamley IW, Castelletto V. Small-angle scattering techniques for peptide and peptide hybrid nanostructures and peptide-based biomaterials. Adv Colloid Interface Sci 2023; 318:102959. [PMID: 37473606 DOI: 10.1016/j.cis.2023.102959] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 07/03/2023] [Accepted: 07/04/2023] [Indexed: 07/22/2023]
Abstract
The use of small-angle scattering (SAS) in the study of the self-assembly of peptides and peptide conjugates (lipopeptides, polymer-peptide conjugates and others) is reviewed, highlighting selected research that illustrates different methods and analysis techniques. Both small-angle x-ray scattering (SAXS) and small-angle neutron scattering (SANS) are considered along with examples that exploit their unique capabilities. For SAXS, this includes the ability to perform rapid measurements enabling high throughput or fast kinetic studies and measurements under dilute conditions. For SANS, contrast variation using H2O/D2O mixtures enables the study of peptides interacting with lipids and TR-SANS (time-resolved SANS) studies of exchange kinetics and/or peptide-induced structural changes. Examples are provided of studies measuring form factors of different self-assembled structures (micelles, fibrils, nanotapes, nanotubes etc) as well as structure factors from ordered phases (lyotropic mesophases), peptide gels and hybrid materials such as membranes formed by mixing peptides with polysaccharides or peptide/liposome mixtures. SAXS/WAXS (WAXS: wide-angle x-ray scattering) on peptides and peptide hybrids is also discussed, and the review concludes with a perspective on potential future directions for research in the field.
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Affiliation(s)
- Ian W Hamley
- Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, UK.
| | - Valeria Castelletto
- Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, UK
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5
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Varvarà P, Calà C, Maida CM, Giuffrè M, Mauro N, Cavallaro G. Arginine-Rich Peptidomimetic Ampicillin/Gentamicin Conjugate To Tackle Nosocomial Biofilms: A Promising Strategy To Repurpose First-Line Antibiotics. ACS Infect Dis 2023; 9:916-927. [PMID: 36926826 DOI: 10.1021/acsinfecdis.2c00579] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
Abstract
Combined therapy with penicillins and aminoglycosides has been proved beneficial to address many persistent bacterial infections with possible synergistic effects. However, the different pharmacokinetic profiles of these two antibiotic classes may not guarantee a concerted spatio-temporal delivery at the site of action, decreasing the efficacy of this combination and promoting resistance. Herein, we propose a multifunctional antibiotic-polymer conjugate, designed to colocalize ampicillin and gentamicin to tackle persistent biofilm infections. The two antibacterial molecules were grafted along with the amino acid l-arginine to a biocompatible polymer backbone with peptidomimetic hydrophilic structure, obtaining the antimicrobial poly(argilylaspartamide-co-aspartic) acid-ampicillin, gentamicin (PAA-AG) conjugate. The PAA-AG conjugate displayed excellent biocompatibility on human cell lines if compared with free drugs, potentially enlarging their therapeutic window and safety, and suitable mucoadhesive characteristics which may help local treatments of mucosal infections. Studies on planktonic cultures of clinical and reference strains of S. aureus, P. aeruginosa, and E. coli revealed that PAA-AG holds a broad-spectrum antibacterial efficacy, revealing high potency in inhibiting the growth of the tested strains. More interestingly, PAA-AG exhibited excellent antibiofilm activity on both Gram+ and Gram- communities, showing inhibition of their formation at subMIC concentrations as well as inducing the regression of mature biofilms. Given the high biocompatibility and broad antibiofilm efficacy, combined with the opportunity for synchronous co-delivery, the PAA-AG conjugate could be a valuable tool to increase the success of ampicillin/gentamicin-based antibiotic multitherapy.
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Affiliation(s)
- Paola Varvarà
- Laboratory of Biocompatible Polymers, Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, via Archirafi 32, 90123 Palermo, Italy
| | - Cinzia Calà
- Department of "Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza - G. D'Alessandro", University of Palermo, Via Del Vespro 133, 90127 Palermo, Italy
| | - Carmelo M Maida
- Department of "Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza - G. D'Alessandro", University of Palermo, Via Del Vespro 133, 90127 Palermo, Italy
| | - Mario Giuffrè
- Department of "Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza - G. D'Alessandro", University of Palermo, Via Del Vespro 133, 90127 Palermo, Italy
| | - Nicolò Mauro
- Laboratory of Biocompatible Polymers, Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, via Archirafi 32, 90123 Palermo, Italy
| | - Gennara Cavallaro
- Laboratory of Biocompatible Polymers, Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, via Archirafi 32, 90123 Palermo, Italy.,ATeN Center - Advanced Technologies Network Center, University of Palermo, Viale delle Scienze - Edificio 18/A, 90128 Palermo, Italy
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6
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X de Andrade D, Colherinhas G. Polar Zipper on a Peptide Nanomembrane: A Characterization by Potential of Mean Force. J Phys Chem B 2023; 127:228-235. [PMID: 36548131 DOI: 10.1021/acs.jpcb.2c07135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
In this work, nanomembranes formed by the I3XGK (X = Q, S, or N) polar peptides are studied to characterize the average force and energy required to separate two neighboring β-sheets laterally joined by polar zippers. The results presented are obtained using a methodology (state of the art) involving the pulling umbrella method to generate the samples (umbrella sampling) and the potential of mean force (PMF) to evaluate the energetic variation evolved in the process of separating the polar zipper. It was observed that the maximum force required to separate the regions linked by polar zippers is 1.48 kJ/mol nm for the I3NGK nanomembrane and 1.22 kJ/mol nm [1.30 kJ/mol nm] for the I3QGK [I3SGK] nanomembranes, emphasizing that polar zippers play an important role in the interaction that interconnects β-sheets in broad and robust two-dimensional structures (tapes and membranes), offering an agile route to the construction of distinct nanomaterials from β-sheets. Also, negative values were obtained for energy as a function of the reaction coordinate for the regions where the formation of polar zippers occurs, showing that the lateral union of neighboring β-sheets is energetically favorable, with a value up to -3.0 kJ/mol, in the case of I3NGK nanomembranes.
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Affiliation(s)
- Douglas X de Andrade
- Instituto Federal de Educação, Ciência e Tecnologia de Goiás, Aparecida de Goiânia, GO74968-755, Brazil
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7
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Rosa E, de Mello L, Castelletto V, Dallas ML, Accardo A, Seitsonen J, Hamley IW. Cell Adhesion Motif-Functionalized Lipopeptides: Nanostructure and Selective Myoblast Cytocompatibility. Biomacromolecules 2023; 24:213-224. [PMID: 36520063 PMCID: PMC9832505 DOI: 10.1021/acs.biomac.2c01068] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The conformation and self-assembly of four lipopeptides, peptide amphiphiles comprising peptides conjugated to lipid chains, in aqueous solution have been examined. The peptide sequence in all four lipopeptides contains the integrin cell adhesion RGDS motif, and the cytocompatibility of the lipopeptides is also analyzed. Lipopeptides have either tetradecyl (C14, myristyl) or hexadecyl (C16, palmitoyl) lipid chains and peptide sequence WGGRGDS or GGGRGDS, that is, with either a tryptophan-containing WGG or triglycine GGG tripeptide spacer between the bioactive peptide motif and the alkyl chain. All four lipopeptides self-assemble above a critical aggregation concentration (CAC), determined through several comparative methods using circular dichroism (CD) and fluorescence. Spectroscopic methods [CD and Fourier transform infrared (FTIR) spectroscopy] show the presence of β-sheet structures, consistent with the extended nanotape, helical ribbon, and nanotube structures observed by cryogenic transmission electron microscopy (cryo-TEM). The high-quality cryo-TEM images clearly show the coexistence of helically twisted ribbon and nanotube structures for C14-WGGRGDS, which highlight the mechanism of nanotube formation by the closure of the ribbons. Small-angle X-ray scattering shows that the nanotapes comprise highly interdigitated peptide bilayers, which are also present in the walls of the nanotubes. Hydrogel formation was observed at sufficiently high concentrations or could be induced by a heat/cool protocol at lower concentrations. Birefringence due to nematic phase formation was observed for several of the lipopeptides, along with spontaneous flow alignment of the lyotropic liquid crystal structure in capillaries. Cell viability assays were performed using both L929 fibroblasts and C2C12 myoblasts to examine the potential uses of the lipopeptides in tissue engineering, with a specific focus on application to cultured (lab-grown) meat, based on myoblast cytocompatibility. Indeed, significantly higher cytocompatibility of myoblasts was observed for all four lipopeptides compared to that for fibroblasts, in particular at a lipopeptide concentration below the CAC. Cytocompatibility could also be improved using hydrogels as cell supports for fibroblasts or myoblasts. Our work highlights that precision control of peptide sequences using bulky aromatic residues within "linker sequences" along with alkyl chain selection can be used to tune the self-assembled nanostructure. In addition, the RGDS-based lipopeptides show promise as materials for tissue engineering, especially those of muscle precursor cells.
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Affiliation(s)
- Elisabetta Rosa
- School
of Chemistry, Pharmacy and Food Biosciences, University of Reading, Whiteknights,
Reading, Berkshire RG6 6AD, U.K.,Department
of Pharmacy and Research Centre on Bioactive Peptides (CIRPeB), University of Naples “Federico II”, Via Domenico Montesano 49, Naples 80131, Italy
| | - Lucas de Mello
- School
of Chemistry, Pharmacy and Food Biosciences, University of Reading, Whiteknights,
Reading, Berkshire RG6 6AD, U.K.,Departamento
de Biofísica, Universidade Federal
de São Paulo, São
Paulo 04023-062, Brazil
| | - Valeria Castelletto
- School
of Chemistry, Pharmacy and Food Biosciences, University of Reading, Whiteknights,
Reading, Berkshire RG6 6AD, U.K.
| | - Mark L. Dallas
- School
of Chemistry, Pharmacy and Food Biosciences, University of Reading, Whiteknights,
Reading, Berkshire RG6 6AD, U.K.
| | - Antonella Accardo
- Department
of Pharmacy and Research Centre on Bioactive Peptides (CIRPeB), University of Naples “Federico II”, Via Domenico Montesano 49, Naples 80131, Italy
| | - Jani Seitsonen
- Nanomicroscopy
Center, Aalto University, Puumiehenkuja 2, Espoo FIN-02150, Finland
| | - Ian W. Hamley
- School
of Chemistry, Pharmacy and Food Biosciences, University of Reading, Whiteknights,
Reading, Berkshire RG6 6AD, U.K.,
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8
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Herrera MG, Amundarain MJ, Nicoletti F, Drechsler M, Costabel M, Gentili PL, Dodero VI. Thin-Plate Superstructures of the Immunogenic 33-mer Gliadin Peptide. Chembiochem 2022; 23:e202200552. [PMID: 36161684 PMCID: PMC9828358 DOI: 10.1002/cbic.202200552] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 09/23/2022] [Indexed: 02/03/2023]
Abstract
Gluten related-disorders have a prevalence of 1-5 % worldwide triggered by the ingestion of gluten proteins in wheat, rye, barley, and some oats. In wheat gluten, the most studied protein is gliadin, whose immunodominant 33-mer amino acid fragment remains after digestive proteolysis and accumulates in the gut mucosa. Here, we report the formation of 33-mer thin-plate superstructures using intrinsic tyrosine (Tyr) steady-state fluorescence anisotropy and cryo-TEM in combination with water tension measurements. Furthermore, we showed that fluorescence decay measurements of 33-mer intrinsic fluorophore Tyr provided information on the early stages of the formation of the thin-plate structures. Finally, conformational analysis of Tyr residues using minimalist models by molecular dynamic simulations (MD) demonstrated that changes in Tyr rotamer states depend on the oligomerization stage. Our findings further advance the understanding of the formation of the 33-mer gliadin peptide superstructures and their relation to health and disease.
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Affiliation(s)
- Maria Georgina Herrera
- Faculty of ChemistryOCIIIBielefeld UniversityUniversitätsstr. 2533615BielefeldGermany,Faculty of Exact and Natural SciencesInstitute of BiosciencesBiotechnology and Translational Biology (iB3)University of Buenos AiresIntendente Güiraldes 2160, Ciudad UniversitariaC1428EGABuenos AiresArgentina
| | - Maria Julia Amundarain
- Instituto de Física del Sur (IFISUR)Departamento de FísicaUniversidad Nacional del Sur (UNS)CONICET Av. L. N. Alem1253, B8000CPB -Bahía BlancaArgentina
| | - Franscesco Nicoletti
- Faculty of ChemistryOCIIIBielefeld UniversityUniversitätsstr. 2533615BielefeldGermany,Department of Chemistry, Biology, and BiotechnologyUniversità degli Studi di PerugiaVia Elce di Sotto 806123PerugiaItaly
| | - Marcus Drechsler
- Bavarian Polymer InstituteUniversity BayreuthUniversitaetsstr. 3095447BayreuthGermany
| | - Marcelo Costabel
- Instituto de Física del Sur (IFISUR)Departamento de FísicaUniversidad Nacional del Sur (UNS)CONICET Av. L. N. Alem1253, B8000CPB -Bahía BlancaArgentina
| | - Pier Luigi Gentili
- Department of Chemistry, Biology, and BiotechnologyUniversità degli Studi di PerugiaVia Elce di Sotto 806123PerugiaItaly
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9
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McCourt J, Kewalramani S, Gao C, Roth EW, Weigand SJ, Olvera de la Cruz M, Bedzyk MJ. Electrostatic Control of Shape Selection and Nanoscale Structure in Chiral Molecular Assemblies. ACS CENTRAL SCIENCE 2022; 8:1169-1181. [PMID: 36032772 PMCID: PMC9413830 DOI: 10.1021/acscentsci.2c00447] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Indexed: 06/01/2023]
Abstract
How molecular chirality manifests at the nano- to macroscale has been a scientific puzzle since Louis Pasteur discovered biochirality. Chiral molecules assemble into meso-shapes such as twisted and helical ribbons, helicoidal scrolls (cochleates), or möbius strips (closed twisted ribbons). Here we analyze self-assembly for a series of amphiphiles, C n -K, consisting of an ionizable amino acid [lysine (K)] coupled to alkyl tails with n = 12, 14, or 16 carbons. This simple system allows us to probe the effects of electrostatic and van der Waals interactions in chiral assemblies. Small/wide-angle X-ray scattering (SAXS/WAXS) reveals that at low pH, where the headgroups are ionized (+1), C16-K forms high aspect ratio, planar crystalline bilayers. Molecular dynamics (MD) simulations reveal that tilted tails of the bilayer leaflets are interdigitated. SAXS shows that, with increasing salt concentration, C16-K molecules assemble into cochleates, whereas at elevated pH (reduced degree of ionization), helices are observed for all C n -K assemblies. The shape selection between helices and scrolls is explained by a membrane energetics model. The nano- to meso-scale structure of the chiral assemblies can be continuously controlled by solution ionic conditions. Overall, our study represents a step toward an electrostatics-based approach for shape selection and nanoscale structure control in chiral assemblies.
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Affiliation(s)
- Joseph
M. McCourt
- Department
of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, United States
| | - Sumit Kewalramani
- Department
of Materials Science and Engineering, Northwestern
University, Evanston, Illinois 60208, United States
| | - Changrui Gao
- Department
of Materials Science and Engineering, Northwestern
University, Evanston, Illinois 60208, United States
| | - Eric W. Roth
- Department
of Materials Science and Engineering, Northwestern
University, Evanston, Illinois 60208, United States
| | - Steven J. Weigand
- DuPont-Northwestern-Dow
Collaborative Access Team, Northwestern
University Synchrotron Research Center, Advanced Photon Source, Argonne, Illinois 60439, United States
| | - Monica Olvera de la Cruz
- Department
of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, United States
- Department
of Materials Science and Engineering, Northwestern
University, Evanston, Illinois 60208, United States
- Department
of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Michael J. Bedzyk
- Department
of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, United States
- Department
of Materials Science and Engineering, Northwestern
University, Evanston, Illinois 60208, United States
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10
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Domingos Alves E, de Andrade DX, de Almeida AR, Colherinhas G. Molecular dynamics study of hydrogen bond in peptide membrane at 150–300 K. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118165] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Castelletto V, Hamley IW. Amyloid
and Hydrogel Formation of a Peptide Sequence
from a Coronavirus Spike Protein. ACS NANO 2022; 16:1857-1867. [PMCID: PMC8867915 DOI: 10.1021/acsnano.1c10658] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 12/29/2021] [Indexed: 05/28/2023]
Abstract
![]()
We demonstrate that
a conserved coronavirus spike protein peptide
forms amyloid structures, differing from the native helical conformation
and not predicted by amyloid aggregation algorithms. We investigate
the conformation and aggregation of peptide RSAIEDLLFDKV,
which is a sequence common to many animal and human coronavirus spike
proteins. This sequence is part of a native α-helical S2 glycoprotein
domain, close to and partly spanning the fusion sequence. This peptide
aggregates into β-sheet amyloid nanotape structures close to
the calculated pI = 4.2, but forms disordered monomers at high and
low pH. The β-sheet conformation revealed by FTIR and circular
dichroism (CD) spectroscopy leads to peptide nanotape structures,
imaged using transmission electron microscopy (TEM) and probed by
small-angle X-ray scattering (SAXS). The nanotapes comprise arginine-coated
bilayers. A Congo red dye UV–vis assay is used to probe the
aggregation of the peptide into amyloid structures, which enabled
the determination of a critical aggregation concentration (CAC). This
peptide also forms hydrogels under precisely defined conditions of
pH and concentration, the rheological properties of which were probed.
The observation of amyloid formation by a coronavirus spike has relevance
to the stability of the spike protein conformation (or its destabilization via pH change), and the peptide may have potential utility
as a functional material. Hydrogels formed by coronavirus peptides
may also be of future interest in the development of slow-release
systems, among other applications.
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Affiliation(s)
- Valeria Castelletto
- Department
of Chemistry, University of Reading, Reading RG6 6AD, United Kingdom
| | - Ian W. Hamley
- Department
of Chemistry, University of Reading, Reading RG6 6AD, United Kingdom
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12
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In situ peptide self-assembly on ionic nanochannel for dynamic monitoring of MMPs in extracellular matrix. Biosens Bioelectron 2022; 195:113671. [PMID: 34624798 DOI: 10.1016/j.bios.2021.113671] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 09/17/2021] [Accepted: 09/26/2021] [Indexed: 12/21/2022]
Abstract
The extracellular matrix (ECM) of tumor mediates malignant transformation and distant metastasis with extracellular proteinases, especially the matrix metalloproteinases (MMPs). However, there is no assay method to trace the dynamic content of MMPs in ECM. In this work, we have proposed a strategy by assembling peptide scaffold on ionic nanochannels to monitor the target proteinases. The short peptide unit is designed to induce self-assembly with good stability, biocompatibility and programmability, while ion nanochannels can provide electrochemical response upon the MMP activities. Taking MMP-2 as an example, the peptide unit includes two regions, one for self-assembly and one for bio-recognition, so the assembly region (KLVFF) can self-assemble to nanofiber networks. In the meantime, since the reactive region (PLGVR) has MMP-2 recognition site, the peptide assembly on nanochannel can thus be used for the detection of active MMP-2 in tumor microenvironment, with a wide linear detection range (10 fg/mL-10 ng/mL) and 6.6 fg/mL limit of detection. Moreover, the availability of the established ECM mimic is able to distinguish active MMP-2 from latent proMMP-2 in tumor samples. By designing different peptide units for self-assembly on the ionic nanochannel, the assay platform can be promisingly used for other proteinases in ECM, so this work may provide a useful approach to trace the dynamic content of the MMPs in tumor microenvironment (TEM).
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13
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Alves ED, de Andrade DX, de Almeida AR, Colherinhas G. Atomistic molecular dynamics study on the influence of high temperatures on the structure of peptide nanomembranes candidates for organic supercapacitor electrode. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116126] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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14
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Narayanan T, Rüter A, Olsson U. SAXS/WAXS Investigation of Amyloid-β(16-22) Peptide Nanotubes. Front Bioeng Biotechnol 2021; 9:654349. [PMID: 33842450 PMCID: PMC8024549 DOI: 10.3389/fbioe.2021.654349] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Accepted: 02/24/2021] [Indexed: 11/13/2022] Open
Abstract
This brief report presents an X-ray scattering investigation of self-assembled nanotubes formed by a short peptide. X-ray scattering methods enable multiscale structural elucidation of these nanotubes in solution under the same conditions involved in the self-assembly process. In particular, the dimensions of nanotubes and the crystalline organization within their walls can be determined quantitatively. This is illustrated in the case of amyloid-β(16-22) peptide nanotubes.
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Affiliation(s)
| | - Axel Rüter
- Division of Physical Chemistry, Lund University, Lund, Sweden
| | - Ulf Olsson
- Division of Physical Chemistry, Lund University, Lund, Sweden
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15
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Castelletto V, Seitsonen J, Ruokolainen J, Hamley IW. Alpha helical surfactant-like peptides self-assemble into pH-dependent nanostructures. SOFT MATTER 2021; 17:3096-3104. [PMID: 33598669 DOI: 10.1039/d0sm02095h] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A designed surfactant-like peptide is shown, using a combination of cryogenic-transmission electron microscopy and small-angle X-ray scattering, to have remarkable pH-dependent self-assembly properties. Peptide Arg3-Leu12 (R3L12) forms a network of peptide nanotubes at pH 9 and below. These are associated with α-helical conformation in a "cross-α" nanotube structure, in which peptide dimers lie perpendicular to the nanotube axis, with arginine coated inner and outer nanotube walls. In contrast, this peptide forms decorated vesicular aggregates at higher pH values, close to the pKa of the arginine residues. These structures are associated with a loss of α-helical order as detected through X-ray scattering, circular dichroism and FTIR spectroscopy, the latter technique also revealing a loss of ordering of leucine side chains. This suggests a proposed model for the decorated or patchy vesicular structures that comprises disordered peptide as the matrix of the membrane, with small domains of ordered peptide dimers forming the minority domains. We ascribe this to a lipid-raft like phase separation process, due to conformational disordering of the leucine hydrophobic chains. The observation of the self-assembly of a simple surfactant-like peptide into these types of nanostructure is remarkable, and peptide R3L12 shows unique pH-dependent morphological and conformational behaviour, with the potential for a range of future applications.
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16
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Peng F, Chen Y, Liu J, Xing Z, Fan J, Zhang W, Qiu F. Facile design of gemini surfactant-like peptide for hydrophobic drug delivery and antimicrobial activity. J Colloid Interface Sci 2021; 591:314-325. [PMID: 33621783 DOI: 10.1016/j.jcis.2021.02.019] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 02/01/2021] [Accepted: 02/04/2021] [Indexed: 02/08/2023]
Abstract
Recently, many kinds of gemini-type amphiphilic peptides have been designed and shown their advantage as self-assembling nanomaterials. In this study, we proposed a simple strategy to design gemini surfactant-like peptides, which are only composed of natural amino acids and can be easily obtained by conventional peptide sythnesis. Taking two prolines as the turn-forming units, a peptide named APK was designed. The petide has a linear sequence but naturally takes the conformation like a gemini surfactant. Compared with a single-tailed surfactant-like peptide A6K, APK showed much stronger ability to undergo self-assembly and to encapsulate hydrophobic pyrene. Several hydrophobic drugs including paclitaxel, doxorubicin, etomidate and propofol were encapsulated by APK, and the corresponding formulations showed anti-tumor or anesthetic efficacy comparable to their respective clinical formulations. Furthermore, APK could inhibit the growth of different microorganisms including E. coli, S. aureus and C. albicans. Etomidate and propofol formulations encapsulated by APK also showed strong antimicrobial activity. Taking APK as an example, our study indicated a straightforward strategy to design gemini surfactant-like peptides, which could be potential nanomaterials for exploring hydrophobic drug formulations with efficacy, safety and self-antimicrobial activity.
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Affiliation(s)
- Fei Peng
- Laboratory of Anesthesia and Critical Care Medicine, Department of Anesthesiology, Translational Neuroscience Center, West China Hospital, Sichuan University, Chengdu 610041, China; National-Local Joint Engineering Research Center of Translational Medicine of Anesthesiology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Yongzhu Chen
- Periodical Press of West China Hospital, Sichuan University, Chengdu 610041, China
| | - Jing Liu
- Laboratory of Anesthesia and Critical Care Medicine, Department of Anesthesiology, Translational Neuroscience Center, West China Hospital, Sichuan University, Chengdu 610041, China; National-Local Joint Engineering Research Center of Translational Medicine of Anesthesiology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Zhihua Xing
- Laboratory of Ethnopharmacology, West China School of Medicine, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Jing Fan
- Laboratory of Anesthesia and Critical Care Medicine, Department of Anesthesiology, Translational Neuroscience Center, West China Hospital, Sichuan University, Chengdu 610041, China; National-Local Joint Engineering Research Center of Translational Medicine of Anesthesiology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Wensheng Zhang
- Laboratory of Anesthesia and Critical Care Medicine, Department of Anesthesiology, Translational Neuroscience Center, West China Hospital, Sichuan University, Chengdu 610041, China; National-Local Joint Engineering Research Center of Translational Medicine of Anesthesiology, West China Hospital, Sichuan University, Chengdu 610041, China.
| | - Feng Qiu
- Laboratory of Anesthesia and Critical Care Medicine, Department of Anesthesiology, Translational Neuroscience Center, West China Hospital, Sichuan University, Chengdu 610041, China; National-Local Joint Engineering Research Center of Translational Medicine of Anesthesiology, West China Hospital, Sichuan University, Chengdu 610041, China.
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17
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Nicks J, Boer SA, White NG, Foster JA. Monolayer nanosheets formed by liquid exfoliation of charge-assisted hydrogen-bonded frameworks. Chem Sci 2021; 12:3322-3327. [PMID: 34164102 PMCID: PMC8179369 DOI: 10.1039/d0sc06906j] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 01/12/2021] [Indexed: 11/21/2022] Open
Abstract
Hydrogen-bonded organic frameworks (HOFs) are a diverse and tunable class of materials, but their potential as free-standing two-dimensional nanomaterials has yet to be explored. Here we report the self-assembly of two layered hydrogen-bonded frameworks based on strong, charge-assisted hydrogen-bonding between carboxylate and amidinium groups. Ultrasound-assisted liquid exfoliation of both materials readily produces monolayer hydrogen-bonded organic nanosheets (HONs) with micron-sized lateral dimensions. The HONs show remarkable stability and maintain their extended crystallinity and monolayer structures even after being suspended in water at 80 °C for three days. These systems also exhibit efficient fluorescence quenching of an organic dye in organic solvents, superior to the quenching ability of the bulk frameworks. We anticipate that this approach will provide a route towards a diverse new family of molecular two-dimensional materials.
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Affiliation(s)
- Joshua Nicks
- Department of Chemistry, University of Sheffield Sheffield UK
| | - Stephanie A Boer
- Research School of Chemistry, The Australian National University Canberra ACT 2600 Australia
| | - Nicholas G White
- Research School of Chemistry, The Australian National University Canberra ACT 2600 Australia
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18
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Andrade D, Colherinhas G. The influence of polar and non-polar interactions on the self-assembly of peptide nanomembranes and their applications: An atomistic study using classical molecular dynamics. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.114263] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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A6H polypeptide membranes: Molecular dynamics simulation, GIAO-DFT-NMR and TD-DFT spectroscopy analysis. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113850] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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20
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Surfactant-like peptides: From molecular design to controllable self-assembly with applications. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213418] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Castelletto V, Seitsonen J, Ruokolainen J, Piras C, Cramer R, Edwards-Gayle CJC, Hamley IW. Peptide nanotubes self-assembled from leucine-rich alpha helical surfactant-like peptides. Chem Commun (Camb) 2020; 56:11977-11980. [PMID: 33033814 DOI: 10.1039/d0cc04299d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The designed arginine-rich surfactant-like peptide R3L12 (arginine3-leucine12) is shown to form a remarkable diversity of self-assembled nanostructures in aqueous solution, depending on pH, including nanotubes, mesh-like tubular networks in three-dimensions and square planar arrays in two-dimensions. These structures are built from α-helical antiparallel coiled-coil peptide dimers arranged perpendicular to the nanotube axis, in a "cross-α" nanotube structure. The aggregation behavior is rationalized based on the effects of dimensionality, and the balance of hydrophobic and electrostatic interactions. The nanotube and nanomesh structures display arginine at high density on their surfaces, which may be valuable for future applications.
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Affiliation(s)
- Valeria Castelletto
- Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, UK.
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22
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Kuczera S, Rüter A, Roger K, Olsson U. Two Dimensional Oblique Molecular Packing within a Model Peptide Ribbon Aggregate. Chemphyschem 2020; 21:1519-1523. [PMID: 32573909 PMCID: PMC7496194 DOI: 10.1002/cphc.201901126] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 04/29/2020] [Indexed: 11/12/2022]
Abstract
A10 K (A=alanine, K=lysine) model peptides self-assemble into ribbon-like β-sheet aggregates. Here, we report an X-ray diffraction investigation on a flow-aligned dispersion of these self-assembly structures. The two-dimensional wide-angle X-ray scattering pattern suggests that peptide pack in a two-dimensional oblique lattice, essentially identical to the crystalline packing of polyalanine, An (for n>4). One side of the oblique unit cell, corresponding to the anti-parallel β-sheet, is oriented along the ribbon's axis. Together with recently published small angle X-ray scattering data of the same system, this work thus yields a detailed description of the self-assembled ribbon aggregates, down to the molecular length scale. Notably, our results highlight the importance of the crystalline peptide packing within its self-assembly aggregates, which is often neglected.
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Affiliation(s)
- Stefan Kuczera
- Division of Physical ChemistryLund UniversitySE-22100LundSweden
- Institute of Clinical SciencesSahlgrenska AcademyGothenburg UniversityGothenburgSE-405 30Sweden
| | - Axel Rüter
- Division of Physical ChemistryLund UniversitySE-22100LundSweden
| | - Kevin Roger
- Laboratoire de Génie ChimiqueUniversité de ToulouseCNRSInstitut National Polytechnique de ToulouseUniversité Paul Sabatier31030ToulouseFrance
| | - Ulf Olsson
- Division of Physical ChemistryLund UniversitySE-22100LundSweden
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23
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24
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Edwards-Gayle CC, Barrett G, Roy S, Castelletto V, Seitsonen J, Ruokolainen J, Hamley IW. Selective Antibacterial Activity and Lipid Membrane Interactions of Arginine-Rich Amphiphilic Peptides. ACS APPLIED BIO MATERIALS 2020; 3:1165-1175. [PMID: 32296775 PMCID: PMC7147261 DOI: 10.1021/acsabm.9b00894] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Accepted: 01/21/2020] [Indexed: 12/22/2022]
Abstract
The self-assembly behavior and antimicrobial activity of two designed amphiphilic peptides, R3F3 and R4F4, containing short hydrophobic phenylalanine (F) and cationic arginine (R) sequences, are investigated. The conformation of the peptides was examined using circular dichroism and FTIR spectroscopy, which show that they have a disordered secondary structure. Concentration-dependent fluorescence assays show the presence of a critical aggregation concentration (cac) for each peptide. Above the cac, small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM) reveal a population of twisted tapes for R3F3 and nanosheets for R4F4. The interaction of the peptides with model bacterial membranes comprising mixtures of the lipids DPPG [1,2-dipalmitoyl-sn-glycero-3-phosphoglycerol] and DPPE [1,2-dipalmitoyl-sn-glycero-3-phosphoethanolamine], was studied using SAXS and cryogenic-TEM. Analysis of the SAXS structure factor indicates that R3F3 interacts with lipid bilayers by inducing correlation between bilayers, whereas R4F4 interacts with the bilayers causing an increase in polydispersity of the vesicle wall thickness. Both peptides break vesicles with a 1:3 DPPG:DPPE composition, which is close to the ratio of PG and PE lipids observed in the lipid membrane of Pseudomonas aeruginosa, a pathogen responsible for serious infections and which has developed antimicrobial resistant strains. Both peptides show activity against this bacterium in planktonic form. Peptide R4F4 shows particularly strong bioactivity against this microbe, with a minimum inhibitory concentration (MIC) value in the range of concentrations where the peptide is cytocompatible. It was further shown to have activity against other Pseudomonas species including the common plant pathogen Pseudomonas syringae. Finally, we show that R4F4 inhibits the development of P. aeruginosa biofilms. This was examined in detail and a proposed mechanism involving binding of the signaling molecule c-di-GMP is suggested, based on circular dichroism spectroscopy studies and Congo red assays of extracellular polysaccharides produced by the stressed bacteria. Thus, R4F4 is a promising candidate antimicrobial peptide with activity against Pseudomonas species.
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Affiliation(s)
| | - Glyn Barrett
- School
of Biological Sciences, University of Reading, Whiteknights, Reading RG6 6AD, U.K.
| | - Shyamali Roy
- School
of Biological Sciences, University of Reading, Whiteknights, Reading RG6 6AD, U.K.
| | - Valeria Castelletto
- School
of Chemistry, Pharmacy and Food Biosciences, University of Reading, Whiteknights, Reading RG6 6AD, U.K.
| | - Jani Seitsonen
- Nanomicroscopy
Center, Aalto University, Puumiehenkuja 2, FIN-02150 Espoo, Finland
| | - Janne Ruokolainen
- Nanomicroscopy
Center, Aalto University, Puumiehenkuja 2, FIN-02150 Espoo, Finland
| | - Ian W. Hamley
- School
of Chemistry, Pharmacy and Food Biosciences, University of Reading, Whiteknights, Reading RG6 6AD, U.K.
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25
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Zhao Q, Liu Q, Li C, Cao L, Ma L, Wang X, Cai Y. Noncovalent structural locking of thermoresponsive polyion complex micelles, nanowires, and vesicles via polymerization-induced electrostatic self-assembly using an arginine-like monomer. Chem Commun (Camb) 2020; 56:4954-4957. [DOI: 10.1039/d0cc00427h] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The noncovalent locking of nanostructured thermoresponsive polyion complexes can be achieved via polymerization-induced electrostatic self-assembly (PIESA) using an arginine-like cationic monomer.
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Affiliation(s)
- Qingqing Zhao
- State-Local Joint Engineering Laboratory for Novel Functional Polymer Materials
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Qizhou Liu
- State-Local Joint Engineering Laboratory for Novel Functional Polymer Materials
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Chao Li
- State-Local Joint Engineering Laboratory for Novel Functional Polymer Materials
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Lei Cao
- State-Local Joint Engineering Laboratory for Novel Functional Polymer Materials
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Lei Ma
- State-Local Joint Engineering Laboratory for Novel Functional Polymer Materials
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Xiyu Wang
- State-Local Joint Engineering Laboratory for Novel Functional Polymer Materials
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Yuanli Cai
- State-Local Joint Engineering Laboratory for Novel Functional Polymer Materials
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
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26
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van Rijt MMJ, Ciaffoni A, Ianiro A, Moradi MA, Boyle AL, Kros A, Friedrich H, Sommerdijk NAJM, Patterson JP. Designing stable, hierarchical peptide fibers from block co-polypeptide sequences. Chem Sci 2019; 10:9001-9008. [PMID: 32874486 PMCID: PMC7449534 DOI: 10.1039/c9sc00800d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 08/02/2019] [Indexed: 02/06/2023] Open
Abstract
Here we report the pH induced self-assembly of equilibrium zwitterionically charged block co-polypeptide nanotubes into hierarchical nanotube fibers.
Natural materials, such as collagen, can assemble with multiple levels of organization in solution. Achieving a similar degree of control over morphology, stability and hierarchical organization with equilibrium synthetic materials remains elusive. For the assembly of peptidic materials the process is controlled by a complex interplay between hydrophobic interactions, electrostatics and secondary structure formation. Consequently, fine tuning the thermodynamics and kinetics of assembly remains extremely challenging. Here, we synthesized a set of block co polypeptides with varying hydrophobicity and ability to form secondary structure. From this set we select a sequence with balanced interactions that results in the formation of high-aspect ratio thermodynamically favored nanotubes, stable between pH 2 and 12 and up to 80 °C. This stability permits their hierarchical assembly into bundled nanotube fibers by directing the pH and inducing complementary zwitterionic charge behavior. This block co-polypeptide design strategy, using defined sequences, provides a straightforward approach to creating complex hierarchical peptide-based assemblies with tunable interactions.
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Affiliation(s)
- Mark M J van Rijt
- Laboratory of Materials and Interface Chemistry , Centre for Multiscale Electron Microscopy , Department of Chemical Engineering and Chemistry , Eindhoven University of Technology , P. O. Box 513 , 5600 MB Eindhoven , The Netherlands . ; .,Institute for Complex Molecular Systems , Eindhoven University of Technology , P. O. Box 513 , 5600 MB Eindhoven , The Netherlands
| | - Adriano Ciaffoni
- Department of Supramolecular & Biomaterials Chemistry , Leiden Institute of Chemistry , Leiden University , P. O. Box 9502, 2300 RA , Leiden , The Netherlands
| | - Alessandro Ianiro
- Institute for Complex Molecular Systems , Eindhoven University of Technology , P. O. Box 513 , 5600 MB Eindhoven , The Netherlands.,Laboratory of Physical Chemistry , Department of Chemical Engineering and Chemistry , Eindhoven University of Technology , P. O. Box 513 , 5600 MB Eindhoven , The Netherlands
| | - Mohammad-Amin Moradi
- Laboratory of Materials and Interface Chemistry , Centre for Multiscale Electron Microscopy , Department of Chemical Engineering and Chemistry , Eindhoven University of Technology , P. O. Box 513 , 5600 MB Eindhoven , The Netherlands . ; .,Institute for Complex Molecular Systems , Eindhoven University of Technology , P. O. Box 513 , 5600 MB Eindhoven , The Netherlands
| | - Aimee L Boyle
- Department of Supramolecular & Biomaterials Chemistry , Leiden Institute of Chemistry , Leiden University , P. O. Box 9502, 2300 RA , Leiden , The Netherlands
| | - Alexander Kros
- Department of Supramolecular & Biomaterials Chemistry , Leiden Institute of Chemistry , Leiden University , P. O. Box 9502, 2300 RA , Leiden , The Netherlands
| | - Heiner Friedrich
- Laboratory of Materials and Interface Chemistry , Centre for Multiscale Electron Microscopy , Department of Chemical Engineering and Chemistry , Eindhoven University of Technology , P. O. Box 513 , 5600 MB Eindhoven , The Netherlands . ; .,Institute for Complex Molecular Systems , Eindhoven University of Technology , P. O. Box 513 , 5600 MB Eindhoven , The Netherlands
| | - Nico A J M Sommerdijk
- Laboratory of Materials and Interface Chemistry , Centre for Multiscale Electron Microscopy , Department of Chemical Engineering and Chemistry , Eindhoven University of Technology , P. O. Box 513 , 5600 MB Eindhoven , The Netherlands . ; .,Institute for Complex Molecular Systems , Eindhoven University of Technology , P. O. Box 513 , 5600 MB Eindhoven , The Netherlands
| | - Joseph P Patterson
- Laboratory of Materials and Interface Chemistry , Centre for Multiscale Electron Microscopy , Department of Chemical Engineering and Chemistry , Eindhoven University of Technology , P. O. Box 513 , 5600 MB Eindhoven , The Netherlands . ; .,Institute for Complex Molecular Systems , Eindhoven University of Technology , P. O. Box 513 , 5600 MB Eindhoven , The Netherlands
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27
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Crossing the blood-brain-barrier with nanoligand drug carriers self-assembled from a phage display peptide. Nat Commun 2019; 10:4635. [PMID: 31604928 PMCID: PMC6789111 DOI: 10.1038/s41467-019-12554-2] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 09/16/2019] [Indexed: 12/26/2022] Open
Abstract
The filamentous bacteriophage fd bind a cell target with exquisite specificity through its few copies of display peptides, whereas nanoparticles functionalized with hundreds to thousands of synthetically generated phage display peptides exhibit variable and often-weak target binding. We hypothesise that some phage peptides in a hierarchical structure rather than in monomeric form recognise and bind their target. Here we show hierarchial forms of a brain-specific phage-derived peptide (herein as NanoLigand Carriers, NLCs) target cerebral endothelial cells through transferrin receptor and the receptor for advanced glycation-end products, cross the blood-brain-barrier and reach neurons and microglial cells. Through intravenous delivery of NLC-β-secretase 1 (BACE1) siRNA complexes we show effective BACE1 down-regulation in the brain without toxicity and inflammation. Therefore, NLCs act as safe multifunctional nanocarriers, overcome efficacy and specificity limitations in active targeting with nanoparticles bearing phage display peptides or cell-penetrating peptides and expand the receptor repertoire of the display peptide. Bacteriophages can bind targets with only a few copies of a display peptide while most nanoparticles with thousands achieve poor binding. Here the authors form hierarchical arrangements of phage peptides to delivery siRNA across the blood brain barrier.
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28
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Merg AD, Touponse G, van Genderen E, Zuo X, Bazrafshan A, Blum T, Hughes S, Salaita K, Abrahams JP, Conticello VP. 2D Crystal Engineering of Nanosheets Assembled from Helical Peptide Building Blocks. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906214] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Andrea D. Merg
- Department of Chemistry Emory University 1515 Dickey Drive Atlanta GA 30322 USA
| | - Gavin Touponse
- Department of Chemistry Emory University 1515 Dickey Drive Atlanta GA 30322 USA
| | | | - Xiaobing Zuo
- X-ray Science Division Argonne National Laboratory 9700 South Cass Avenue Lemont IL 60439 USA
| | - Alisina Bazrafshan
- Department of Chemistry Emory University 1515 Dickey Drive Atlanta GA 30322 USA
| | - Thorsten Blum
- Paul Scherrer Institut 5232 Villigen, PSI Switzerland
| | - Spencer Hughes
- Department of Chemistry Emory University 1515 Dickey Drive Atlanta GA 30322 USA
| | - Khalid Salaita
- Department of Chemistry Emory University 1515 Dickey Drive Atlanta GA 30322 USA
| | - Jan Pieter Abrahams
- Paul Scherrer Institut 5232 Villigen, PSI Switzerland
- Center for Cellular Imaging and NanoAnalytics Biozentrum University of Basel 4058 Basel Switzerland
- Leiden Institute of Biology Sylviusweg 72 2333 BE Leiden The Netherlands
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29
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Merg AD, Touponse G, van Genderen E, Zuo X, Bazrafshan A, Blum T, Hughes S, Salaita K, Abrahams JP, Conticello VP. 2D Crystal Engineering of Nanosheets Assembled from Helical Peptide Building Blocks. Angew Chem Int Ed Engl 2019; 58:13507-13512. [DOI: 10.1002/anie.201906214] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2019] [Revised: 07/07/2019] [Indexed: 12/15/2022]
Affiliation(s)
- Andrea D. Merg
- Department of Chemistry Emory University 1515 Dickey Drive Atlanta GA 30322 USA
| | - Gavin Touponse
- Department of Chemistry Emory University 1515 Dickey Drive Atlanta GA 30322 USA
| | | | - Xiaobing Zuo
- X-ray Science Division Argonne National Laboratory 9700 South Cass Avenue Lemont IL 60439 USA
| | - Alisina Bazrafshan
- Department of Chemistry Emory University 1515 Dickey Drive Atlanta GA 30322 USA
| | - Thorsten Blum
- Paul Scherrer Institut 5232 Villigen, PSI Switzerland
| | - Spencer Hughes
- Department of Chemistry Emory University 1515 Dickey Drive Atlanta GA 30322 USA
| | - Khalid Salaita
- Department of Chemistry Emory University 1515 Dickey Drive Atlanta GA 30322 USA
| | - Jan Pieter Abrahams
- Paul Scherrer Institut 5232 Villigen, PSI Switzerland
- Center for Cellular Imaging and NanoAnalytics Biozentrum University of Basel 4058 Basel Switzerland
- Leiden Institute of Biology Sylviusweg 72 2333 BE Leiden The Netherlands
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30
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Joseph JP, Singh A, Gupta D, Miglani C, Pal A. Tandem Interplay of the Host-Guest Interaction and Photoresponsive Supramolecular Polymerization to 1D and 2D Functional Peptide Materials. ACS APPLIED MATERIALS & INTERFACES 2019; 11:28213-28220. [PMID: 31305990 DOI: 10.1021/acsami.9b09690] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Peptide 1 with an Aβ42 amyloid nucleating core and a photodimerizable 4-methylcoumarin moiety at its N terminus demonstrates the step-wise self-assembly in water to form nanoparticles, with eventual transformation into 1D nanofibers. Addition of γ-cyclodextrin to 1 with subsequent irradiation with UV light at 320 nm resulted in morphological conversion to free-standing 2D nanosheets mediated by the host-guest interaction. Mechanical agitation of the 1D and 2D nanostructures led to seeds with narrow polydispersity indices, which by mediation of seeded supramolecular polymerization found seamless control over the dimensions of the nanostructures. Such structural and temporal control to differentiate the pathway was exploited to tune the mechanical strength of hierarchical hydrogel materials. Finally, the dimensional characteristics of the positively charged peptide fibers and sheets were envisaged as excellent exfoliating agents for inorganic hybrid materials, for example, MoS2.
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Affiliation(s)
- Jojo P Joseph
- Institute of Nano Science and Technology , Phase 10, Sector 64 , Mohali , Punjab 160062 , India
| | - Ashmeet Singh
- Institute of Nano Science and Technology , Phase 10, Sector 64 , Mohali , Punjab 160062 , India
| | - Deepika Gupta
- Institute of Nano Science and Technology , Phase 10, Sector 64 , Mohali , Punjab 160062 , India
| | - Chirag Miglani
- Institute of Nano Science and Technology , Phase 10, Sector 64 , Mohali , Punjab 160062 , India
| | - Asish Pal
- Institute of Nano Science and Technology , Phase 10, Sector 64 , Mohali , Punjab 160062 , India
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Edwards-Gayle CC, Castelletto V, Hamley IW, Barrett G, Greco F, Hermida-Merino D, Rambo RP, Seitsonen J, Ruokolainen J. Self-Assembly, Antimicrobial Activity, and Membrane Interactions of Arginine-Capped Peptide Bola-Amphiphiles. ACS APPLIED BIO MATERIALS 2019; 2:2208-2218. [PMID: 31157325 PMCID: PMC6537463 DOI: 10.1021/acsabm.9b00172] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 04/16/2019] [Indexed: 12/27/2022]
Abstract
The self-assembly and antimicrobial activity of two novel arginine-capped bola-amphiphile peptides, namely RA6R and RA9R (R, arginine; A, alanine) are investigated. RA6R does not self-assemble in water due to its high solubility, but RA9R self-assembles above a critical aggregation concentration into ordered nanofibers due to the high hydrophobicity of the A9block. The structure of the RA9R nanofibers is studied by cryogenic transmission electron microscopy (cryo-TEM) and small-angle X-ray scattering (SAXS). Circular dichroism spectroscopy shows that both RA6R and RA9R adopt coil conformations in water at low concentration, but only RA9R adopts a β-sheet conformation at high concentration. SAXS and differential scanning calorimetry are used to study RA6R and RA9R interactions with a mixed lipid membrane that models a bacterial cell wall, consisting of multilamellar 1,2-dipalmitoyl-sn-glycero-3-phosphoglycerol/1,2-dipalmitoyl-sn-glycero-3-phosphoethanolamine vesicles. Cytotoxicity studies show that RA6R is more cytocompatible than RA9R. RA6R has enhanced activity against the Gram-negative pathogen P. aeruginosa at a concentration where viability of mammalian cells is retained. RA9R has little antimicrobial activity, independently of concentration. Our results highlight the influence of the interplay between relative charge and hydrophobicity on the self-assembly, cytocompatibility, and bioactivity of peptide bola-amphiphiles.
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Affiliation(s)
- Charlotte
J. C. Edwards-Gayle
- School
of Chemistry, Food Biosciences and Pharmacy, University of Reading, Whiteknights, Reading RG6 6AD, U.K.
- Diamond
Light Source, Harwell Science and Innovation
Campus, Didcot, Oxfordshire OX11 0DE, U.K.
| | - Valeria Castelletto
- School
of Chemistry, Food Biosciences and Pharmacy, University of Reading, Whiteknights, Reading RG6 6AD, U.K.
| | - Ian W. Hamley
- School
of Chemistry, Food Biosciences and Pharmacy, University of Reading, Whiteknights, Reading RG6 6AD, U.K.
| | - Glyn Barrett
- School
of Biological Sciences, University of Reading, Reading RG6 6UR, U.K.
| | - Francesca Greco
- School
of Chemistry, Food Biosciences and Pharmacy, University of Reading, Whiteknights, Reading RG6 6AD, U.K.
| | | | - Robert P. Rambo
- Diamond
Light Source, Harwell Science and Innovation
Campus, Didcot, Oxfordshire OX11 0DE, U.K.
| | - Jani Seitsonen
- Department
of Applied Physics, Aalto School of Science, P.O. Box 15100, FI-00076 Aalto, Finland
| | - Janne Ruokolainen
- Department
of Applied Physics, Aalto School of Science, P.O. Box 15100, FI-00076 Aalto, Finland
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32
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Andrade D, Oliveira LBA, Colherinhas G. Elucidating NH2-I3V3A3G3K3-COOH and NH2-K3G3A3V3I3-COOH polypeptide membranes: A classical molecular dynamics study. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.02.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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33
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Castelletto V, Edwards-Gayle CJC, Hamley IW, Barrett G, Seitsonen J, Ruokolainen J. Peptide-Stabilized Emulsions and Gels from an Arginine-Rich Surfactant-like Peptide with Antimicrobial Activity. ACS APPLIED MATERIALS & INTERFACES 2019; 11:9893-9903. [PMID: 30785266 PMCID: PMC7005944 DOI: 10.1021/acsami.9b00581] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 02/20/2019] [Indexed: 05/05/2023]
Abstract
The preparation of hydrogels and stable emulsions is important in the formulation of many functional nanostructured soft materials. We investigate the multifunctional self-assembly and bioactivity properties of a novel surfactant-like peptide (SLP) that shows antimicrobial activity, is able to form hydrogels without pH adjustment, and is able to stabilize oil-in-water emulsions. Furthermore, we demonstrate on-demand de-emulsification in response to the protease enzyme elastase. We show that SLP (Ala)9-Arg (A9R) forms β-sheet fibers above a critical aggregation concentration and that water-in-oil emulsions are stabilized by a coating of β-sheet fibers around the emulsion droplets. Furthermore, we demonstrate enzyme-responsive de-emulsification, which has potential in the development of responsive release systems. The peptide shows selective antimicrobial activity against Gram-negative pathogens including Pseudomonas aeruginosa, which causes serious infections. Our results highlight the utility of SLPs in the stabilization of oil/water emulsions and the potential for these to be used to formulate antimicrobial peptide emulsions which are additionally responsive to protease. The peptide A9R has pronounced antibacterial activity against clinically challenging pathogens, and its ability to form β-sheet fibers plays a key role in its diverse structural properties, ranging from hydrogel formation to emulsion stabilization.
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Affiliation(s)
- Valeria Castelletto
- Department of Chemistry and School of Biological
Sciences, University of Reading, Reading RG6 6AD, United Kingdom
| | | | - Ian W. Hamley
- Department of Chemistry and School of Biological
Sciences, University of Reading, Reading RG6 6AD, United Kingdom
| | - Glyn Barrett
- Department of Chemistry and School of Biological
Sciences, University of Reading, Reading RG6 6AD, United Kingdom
| | - Jani Seitsonen
- Nanomicroscopy Center, Aalto University, Puumiehenkuja
2, FIN-02150 Espoo, Finland
| | - Janne Ruokolainen
- Nanomicroscopy Center, Aalto University, Puumiehenkuja
2, FIN-02150 Espoo, Finland
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34
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Castelletto V, Barnes RH, Karatzas KA, Edwards-Gayle CJC, Greco F, Hamley IW, Seitsonen J, Ruokolainen J. Restructuring of Lipid Membranes by an Arginine-Capped Peptide Bolaamphiphile. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:1302-1311. [PMID: 30056711 DOI: 10.1021/acs.langmuir.8b01014] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We study the self-assembly of arginine-capped bolaamphiphile peptide RA3R (A: alanine, R: arginine) together with its binding to model membranes and its cytotoxicity and antimicrobial activity. Anionic 2-oleoyl-1-palmitoyl- sn-glycero-3-phospho-rac-(1-glycerol) sodium salt/2-oleoyl-1-palmitoyl- sn-glycero-3-phosphoethanolamine (POPG/POPE) vesicles and zwitterionic 1,2-dioleoyl- sn-glycero-3-phosphocholine/2-oleoyl-1-palmitoyl- sn-glycero-3-phosphocholine (POPC/DOPC) vesicles are used as model membranes to mimic bacterial and mammalian cell membranes, respectively. We show that RA3R adopts a polyproline-II collagen-like conformation in water. Binding of RA3R to POPG/POPE vesicles induces a strong correlation between the lipid bilayers, driven by RA3R/POPG attractive electrostatic interaction together with a shift of the intramolecular POPE zwitterionic interaction toward an attractive electrostatic interaction with the RA3R. Populations of RA3R/POPG/POPE vesicles comprise different bilayer spacings, dA and dB, controlled by the conformation of the lipid chains corresponding to the Lβ (gel-like) and Lα (liquid-crystal) phases, respectively. Cryo-TEM images reveal the presence of vesicles with no internal structure, compartmentalized thin-wall vesicles, or multilayer vesicles with uncorrelated layers and compartmentalization depending on the RA3R/POPG/POPE composition. In contrast, the interaction of RA3R with multilamellar POPC/DOPC vesicles leads to the decorrelation of the lipid bilayers. RA3R was tolerated by skin fibroblast cells for a concentration up to 0.01 wt %, while 0.25 wt % RA3R proved to be an efficient antibacterial agent against Gram-positive bacteria L. monocytogenes. Our results highlight the ability of RA3R to distinguish between bacterial and mammalian cells and establish this peptide as a candidate to reduce the proliferation of L. monocytogenes bacteria.
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Affiliation(s)
- Valeria Castelletto
- School of Chemistry, Food Biosciences and Pharmacy , University of Reading , Whiteknights , Reading RG6 6AD , United Kingdom
| | - Ruth H Barnes
- School of Chemistry, Food Biosciences and Pharmacy , University of Reading , Whiteknights , Reading RG6 6AD , United Kingdom
| | - Kimon-Andreas Karatzas
- School of Chemistry, Food Biosciences and Pharmacy , University of Reading , Whiteknights , Reading RG6 6AD , United Kingdom
| | - Charlotte J C Edwards-Gayle
- School of Chemistry, Food Biosciences and Pharmacy , University of Reading , Whiteknights , Reading RG6 6AD , United Kingdom
| | - Francesca Greco
- School of Chemistry, Food Biosciences and Pharmacy , University of Reading , Whiteknights , Reading RG6 6AD , United Kingdom
| | - Ian W Hamley
- School of Chemistry, Food Biosciences and Pharmacy , University of Reading , Whiteknights , Reading RG6 6AD , United Kingdom
| | - Jani Seitsonen
- Department of Applied Physics , Aalto School of Science , P.O. Box 15100, FI-00076 Aalto , Finland
| | - Janne Ruokolainen
- Department of Applied Physics , Aalto School of Science , P.O. Box 15100, FI-00076 Aalto , Finland
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35
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Castelletto V, Chippindale AM, Hamley IW, Barnett S, Hasan A, Lau KHA. Crystallization and lamellar nanosheet formation of an aromatic dipeptoid. Chem Commun (Camb) 2019; 55:5867-5869. [DOI: 10.1039/c9cc02335f] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An aromatic peptoid analogue of the diphenylalanine dipeptide self-assembles in aqueous solution and the first crystal structure was obtained for this class of compound.
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Affiliation(s)
| | | | - Ian W. Hamley
- Department of Chemistry
- University of Reading
- Reading RG6 6AD
- UK
| | - Sarah Barnett
- Diamond Light Source
- Harwell Science and Innovation Campus
- Didcot
- UK
| | - Abshar Hasan
- WestCHEM/Department of Pure & Applied Chemistry
- University of Strathclyde
- Glasgow
- UK
| | - King Hang Aaron Lau
- WestCHEM/Department of Pure & Applied Chemistry
- University of Strathclyde
- Glasgow
- UK
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36
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Zhang X, Gong C, Akakuru OU, Su Z, Wu A, Wei G. The design and biomedical applications of self-assembled two-dimensional organic biomaterials. Chem Soc Rev 2019; 48:5564-5595. [DOI: 10.1039/c8cs01003j] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Self-assembling 2D organic biomaterials exhibit versatile abilities for structural and functional tailoring, as well as high potential for biomedical applications.
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Affiliation(s)
- Xiaoyuan Zhang
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- China
- Faculty of Physics and Astronomy
- University of Jena
| | - Coucong Gong
- Faculty of Production Engineering
- University of Bremen
- Bremen
- Germany
| | - Ozioma Udochukwu Akakuru
- Cixi Institute of Biomedical Engineering
- CAS Key Laboratory of Magnetic Materials and Devices, & Key Laboratory of Additive Manufacturing Materials of Zhejiang Province
- Ningbo Institute of Materials Technology and Engineering
- Chinese Academy of Sciences
- Ningbo
| | - Zhiqiang Su
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- China
| | - Aiguo Wu
- Cixi Institute of Biomedical Engineering
- CAS Key Laboratory of Magnetic Materials and Devices, & Key Laboratory of Additive Manufacturing Materials of Zhejiang Province
- Ningbo Institute of Materials Technology and Engineering
- Chinese Academy of Sciences
- Ningbo
| | - Gang Wei
- Faculty of Production Engineering
- University of Bremen
- Bremen
- Germany
- Cixi Institute of Biomedical Engineering
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37
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Tian Y, Polzer FB, Zhang HV, Kiick KL, Saven JG, Pochan DJ. Nanotubes, Plates, and Needles: Pathway-Dependent Self-Assembly of Computationally Designed Peptides. Biomacromolecules 2018; 19:4286-4298. [DOI: 10.1021/acs.biomac.8b01163] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Yu Tian
- Materials Science and Engineering Department, University of Delaware, Newark, Delaware 19716, United States
| | - Frank B. Polzer
- Materials Science and Engineering Department, University of Delaware, Newark, Delaware 19716, United States
| | - Huixi Violet Zhang
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Kristi L. Kiick
- Materials Science and Engineering Department, University of Delaware, Newark, Delaware 19716, United States
| | - Jeffery G. Saven
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Darrin J. Pochan
- Materials Science and Engineering Department, University of Delaware, Newark, Delaware 19716, United States
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38
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Nikoofard N, Maghsoodi F. Dynamic stability of nano-fibers self-assembled from short amphiphilic A 6D peptides. J Chem Phys 2018; 148:134903. [PMID: 29626855 DOI: 10.1063/1.5019766] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Self-assembly of A6D amphiphilic peptides in explicit water is studied by using coarse-grained molecular dynamics simulations. It is observed that the self-assembly of randomly distributed A6D peptides leads to the formation of a network of nano-fibers. Two other simulations with cylindrical nano-fibers as the initial configuration show the dynamic stability of the self-assembled nano-fibers. As a striking feature, notable fluctuations occur along the axes of the nano-fibers. Depending on the number of peptides per unit length of the nano-fiber, flat-shaped bulges or spiral shapes along the nano-fiber axis are observed at the fluctuations. Analysis of the particle distribution around the nano-fiber indicates that the hydrophobic core and the hydrophilic shell of the nano-structure are preserved in both simulations. The size of the deformations and their correlation times are different in the two simulations. This study gives new insights into the dynamics of the self-assembled nano-structures of short amphiphilic peptides.
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Affiliation(s)
- Narges Nikoofard
- Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan 51167-87317, Iran
| | - Fahimeh Maghsoodi
- Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan 51167-87317, Iran
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39
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40
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Castelletto V, Barnes RH, Karatzas KA, Edwards-Gayle CJC, Greco F, Hamley IW, Rambo R, Seitsonen J, Ruokolainen J. Arginine-Containing Surfactant-Like Peptides: Interaction with Lipid Membranes and Antimicrobial Activity. Biomacromolecules 2018; 19:2782-2794. [PMID: 29738229 DOI: 10.1021/acs.biomac.8b00391] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The activity of antimicrobial peptides stems from their interaction with bacterial membranes, which are disrupted according to a number of proposed mechanisms. Here, we investigate the interaction of a model antimicrobial peptide that contains a single arginine residue with vesicles containing model lipid membranes. The surfactant-like peptide Ala6-Arg (A6R) is studied in the form where both termini are capped (CONH-A6R-NH2, capA6R) or uncapped (NH2-A6R-OH, A6R). Lipid membranes are selected to correspond to model anionic membranes (POPE/POPG) resembling those in bacteria or model zwitterionic membranes (POPC/DOPC) similar to those found in mammalian cells. Viable antimicrobial agents should show activity against anionic membranes but not zwitterionic membranes. We find, using small-angle X-ray scattering (SAXS) and cryogenic-TEM (transmission electron microscopy) that, uniquely, capA6R causes structuring of anionic membranes due to the incorporation of the peptide in the lipid bilayer with peptide β-sheet conformation revealed by circular dichroism spectroscopy (CD). There is a preferential interaction of the peptide with POPG (which is the only anionic lipid in the systems studied) due to electrostatic interactions and bidentate hydrogen bonding between arginine guanidinium and lipid phosphate groups. At a certain composition, this peptide leads to the remarkable tubulation of zwitterionic phosphatidylcholine (PC) vesicles, which is ascribed to the interaction of the peptide with the outer lipid membrane, which occurs without penetration into the membrane. In contrast, peptide A6R has a minimal influence on the anionic lipid membranes (and no β-sheet peptide structure is observed) but causes thinning (lamellar decorrelation) of zwitterionic membranes. We also investigated the cytotoxicity (to fibroblasts) and antimicrobial activity of these two peptides against model Gram positive and Gram negative bacteria. A strong selective antimicrobial activity against Gram positive Listeria monocytogenes, which is an important food-borne pathogen, is observed for capA6R. Peptide A6R is active against all three studied bacteria. The activity of the peptides against bacteria and mammalian cells is related to the specific interactions uncovered through our SAXS, cryo-TEM, and CD measurements. Our results highlight the exquisite sensitivity to the charge distribution in these designed peptides and its effect on the interaction with lipid membranes bearing different charges, and ultimately on antimicrobial activity.
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Affiliation(s)
- Valeria Castelletto
- School of Chemistry, Food Biosciences and Pharmacy , University of Reading , Whiteknights , Reading RG6 6AD , United Kingdom
| | - Ruth H Barnes
- School of Chemistry, Food Biosciences and Pharmacy , University of Reading , Whiteknights , Reading RG6 6AD , United Kingdom
| | - Kimon-Andreas Karatzas
- School of Chemistry, Food Biosciences and Pharmacy , University of Reading , Whiteknights , Reading RG6 6AD , United Kingdom
| | - Charlotte J C Edwards-Gayle
- School of Chemistry, Food Biosciences and Pharmacy , University of Reading , Whiteknights , Reading RG6 6AD , United Kingdom
| | - Francesca Greco
- School of Chemistry, Food Biosciences and Pharmacy , University of Reading , Whiteknights , Reading RG6 6AD , United Kingdom
| | - Ian W Hamley
- School of Chemistry, Food Biosciences and Pharmacy , University of Reading , Whiteknights , Reading RG6 6AD , United Kingdom
| | - Robert Rambo
- Diamond Light Source , Harwell Science and Innovation Campus , Didcot, Oxfordshire OX11 0DE , United Kingdom
| | - Jani Seitsonen
- Department of Applied Physics , Aalto School of Science , P.O. Box 15100, FI-00076 Aalto , Finland
| | - Janne Ruokolainen
- Department of Applied Physics , Aalto School of Science , P.O. Box 15100, FI-00076 Aalto , Finland
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41
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Hamley IW, Castelletto V, Dehsorkhi A, Torras J, Aleman C, Portnaya I, Danino D. The Conformation and Aggregation of Proline-Rich Surfactant-Like Peptides. J Phys Chem B 2018; 122:1826-1835. [PMID: 29357666 DOI: 10.1021/acs.jpcb.7b11463] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The secondary structure of proline-rich surfactant-like peptides is examined for the first time and is found to be influenced by charged end groups in peptides P6K, P6E, and KP6E and an equimolar mixture of P6K and P6E. The peptides exhibit a conformational transition from unordered to polyproline II (PPII) above a critical concentration, detected from circular dichroism (CD) measurements and unexpectedly from fluorescence dye probe measurements. Isothermal titration calorimetry (ITC) measurements provided the Gibbs energies of hydration of P6K and P6E, which correspond essentially to the hydration energies of the terminal charged residues. A detailed analysis of peptide conformation for these peptides was performed using density functional theory calculations, and this was used as a basis for hybrid quantum mechanics/molecular mechanics molecular dynamics (QM/MM MD) simulations. Quantum mechanics simulations in implicit water show both peptides (and their 1:1 mixture) exhibit PPII conformations. However, hybrid QM/MM MD simulations suggest that some deviations from this conformation are present for P6K and P6E in peptide bonds close to the charged residue, whereas in the 1:1 mixture a PPII structure is observed. Finally, aggregation of the peptides was investigated using replica exchange molecular dynamics simulations. These reveal a tendency for the average aggregate size (as measured by the radius of gyration) to increase with increasing temperature, which is especially marked for P6K, although the fraction of the most populated clusters is larger for P6E.
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Affiliation(s)
- Ian W Hamley
- Department of Chemistry, University of Reading, Whiteknights , Reading RG6 6AD, U.K
| | - Valeria Castelletto
- Department of Chemistry, University of Reading, Whiteknights , Reading RG6 6AD, U.K
| | - Ashkan Dehsorkhi
- Department of Chemistry, University of Reading, Whiteknights , Reading RG6 6AD, U.K
| | - Juan Torras
- Departament d'Enginyeria Química (EEBE) and Barcelona Research Center for Multiscale Science and Engineering, Universitat Politècnica de Catalunya , C/Eduard Maristany, 10-14, Ed. I2, 08019, Barcelona, Spain
| | - Carlos Aleman
- Departament d'Enginyeria Química (EEBE) and Barcelona Research Center for Multiscale Science and Engineering, Universitat Politècnica de Catalunya , C/Eduard Maristany, 10-14, Ed. I2, 08019, Barcelona, Spain
| | - Irina Portnaya
- Department of Biotechnology and Food Engineering and the Russell Berrie Nanotechnology Institute, Technion , Haifa, Israel 32000
| | - Dganit Danino
- Department of Biotechnology and Food Engineering and the Russell Berrie Nanotechnology Institute, Technion , Haifa, Israel 32000
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42
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Methods to Characterize the Nanostructure and Molecular Organization of Amphiphilic Peptide Assemblies. Methods Mol Biol 2018; 1777:3-21. [PMID: 29744826 DOI: 10.1007/978-1-4939-7811-3_1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Methods to characterize the nanostructure and molecular organization of aggregates of peptides such as amyloid or amphiphilic peptide assemblies are reviewed. We discuss techniques to characterize conformation and secondary structure including circular and linear dichroism and FTIR and Raman spectroscopies, as well as fluorescence methods to detect aggregation. NMR spectroscopy methods, especially solid-state NMR measurements to probe beta-sheet packing motifs, are also briefly outlined. Also discussed are scattering methods including X-ray diffraction and small-angle scattering techniques including SAXS (small-angle X-ray scattering) and SANS (small-angle neutron scattering) and dynamic light scattering. Imaging methods are direct methods to uncover features of peptide nanostructures, and we provide a summary of electron microscopy and atomic force microscopy techniques. Selected examples are highlighted showing data obtained using these techniques, which provide a powerful suite of methods to probe ordering from the molecular scale to the aggregate superstructure.
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43
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Cao M, Lu S, Zhao W, Deng L, Wang M, Wang J, Zhou P, Wang D, Xu H, Lu JR. Peptide Self-Assembled Nanostructures with Distinct Morphologies and Properties Fabricated by Molecular Design. ACS APPLIED MATERIALS & INTERFACES 2017; 9:39174-39184. [PMID: 29067798 DOI: 10.1021/acsami.7b11681] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Six surfactant-like peptides with the same amino acid composition but different primary sequences are designed, including G3A3V3I3K3, K3I3V3A3G3, I3V3A3G3K3, K3G3A3V3I3, V3G3I3A3K3, and K3A3I3G3V3. These peptides form antiparallel β-sheets during self-assembly. Because the constituent residues have different side chain size and hydrophobicity, sequence changes adjust group distribution and hydrophobicity on the two sides of a given β-sheet. This consequently tunes the binding energy of the side-to-side pairing conformations and leads to different self-assembled structures. G3A3V3I3K3 and K3I3V3A3G3 form short nanorods with diameters of 8.5 ± 1.0 nm and lengths <150 nm. I3V3A3G3K3 and K3G3A3V3I3 form nanosheets with heights of 4.0 ± 0.5 nm and limited lengths and widths. V3G3I3A3K3 and K3A3I3G3V3 form long fibrils with diameters of 7.0 ± 1.0 nm and lengths of micrometer scale. These nanostructures exhibit different capacity in encapsulating insoluble hydrophobic drug molecules and delivering them into the cells. The nanosheets of I3V3A3G3K3 and K3G3A3V3I3 can encapsulate both nile red and doxorubicin molecules to an extent of up to 17-23% in mole ratio. Moreover, the shape and size of the nanostructures affect the drug delivery into cells greatly, with the nanosheets and short rods exhibiting higher efficiency than the long fibrils. The study provides new insights into programmed peptide self-assembly toward specific functionalities.
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Affiliation(s)
- Meiwen Cao
- State Key Laboratory of Heavy Oil Processing and Centre for Bioengineering and Biotechnology, China University of Petroleum (East China) , 66 Changjiang West Road, Qingdao 266580, China
| | - Sha Lu
- State Key Laboratory of Heavy Oil Processing and Centre for Bioengineering and Biotechnology, China University of Petroleum (East China) , 66 Changjiang West Road, Qingdao 266580, China
| | - Wenjing Zhao
- State Key Laboratory of Heavy Oil Processing and Centre for Bioengineering and Biotechnology, China University of Petroleum (East China) , 66 Changjiang West Road, Qingdao 266580, China
| | - Li Deng
- State Key Laboratory of Heavy Oil Processing and Centre for Bioengineering and Biotechnology, China University of Petroleum (East China) , 66 Changjiang West Road, Qingdao 266580, China
| | - Meng Wang
- State Key Laboratory of Heavy Oil Processing and Centre for Bioengineering and Biotechnology, China University of Petroleum (East China) , 66 Changjiang West Road, Qingdao 266580, China
| | - Jiqian Wang
- State Key Laboratory of Heavy Oil Processing and Centre for Bioengineering and Biotechnology, China University of Petroleum (East China) , 66 Changjiang West Road, Qingdao 266580, China
| | - Peng Zhou
- State Key Laboratory of Heavy Oil Processing and Centre for Bioengineering and Biotechnology, China University of Petroleum (East China) , 66 Changjiang West Road, Qingdao 266580, China
| | - Dong Wang
- State Key Laboratory of Heavy Oil Processing and Centre for Bioengineering and Biotechnology, China University of Petroleum (East China) , 66 Changjiang West Road, Qingdao 266580, China
| | - Hai Xu
- State Key Laboratory of Heavy Oil Processing and Centre for Bioengineering and Biotechnology, China University of Petroleum (East China) , 66 Changjiang West Road, Qingdao 266580, China
| | - Jian R Lu
- Biological Physics Laboratory, School of Physics and Astronomy, University of Manchester , Schuster Building, Oxford Road, Manchester M13 9PL, U.K
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44
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Jiang T, Magnotti EL, Conticello VP. Geometrical frustration as a potential design principle for peptide-based assemblies. Interface Focus 2017; 7:20160141. [PMID: 29147554 DOI: 10.1098/rsfs.2016.0141] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Two-dimensional peptide and protein assemblies have been the focus of increased scientific research as they display significant potential for the creation of functional nanomaterials. Soluble subunits derived from a variety of protein motifs have been demonstrated to self-assemble into structurally defined nanosheets under environmentally benign conditions in which the components often retain their native structure and function. These types of two-dimensional assemblies may have an advantage for nanofabrication in that their extended planar shapes can be more straightforwardly incorporated into the current formats of nanoscale devices. However, significant challenges remain in the fabrication of these materials, particularly in devising methods to control the size, shape and internal structure of the resultant materials. Geometrical frustration may be envisioned as a possible mechanism to exert control over these structural parameters through rational design. While this objective has yet to be realized in practice, we discuss in this article the potential role of geometrical frustration as a principle to rationalize unusual self-assembly behaviour in several examples of two-dimensional peptide assemblies.
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Affiliation(s)
- Tao Jiang
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, GA 30322, USA
| | - Elizabeth L Magnotti
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, GA 30322, USA
| | - Vincent P Conticello
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, GA 30322, USA
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45
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Zhou T, Zhang Z, Zhang X, Wang C, Xu G, Yang Y. Self-assembled chiral nanostructures of amphiphilic peptide: from single molecule to aggregate. J Pept Sci 2017; 23:803-809. [DOI: 10.1002/psc.3032] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 07/19/2017] [Accepted: 07/19/2017] [Indexed: 12/24/2022]
Affiliation(s)
- Ting Zhou
- College of Science; China University of Petroleum (East China); Qingdao 266580 China
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology; National Center for Nanoscience and Technology; Beijing 100190 China
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education; Shandong University; Jinan 250100 China
| | - Zhiqing Zhang
- College of Science; China University of Petroleum (East China); Qingdao 266580 China
| | - Xuemei Zhang
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology; National Center for Nanoscience and Technology; Beijing 100190 China
| | - Chen Wang
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology; National Center for Nanoscience and Technology; Beijing 100190 China
| | - Guiying Xu
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education; Shandong University; Jinan 250100 China
| | - Yanlian Yang
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology; National Center for Nanoscience and Technology; Beijing 100190 China
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46
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Travaglini L, Giordano C, D'Annibale A, Gubitosi M, di Gregorio MC, Schillén K, Stefanucci A, Mollica A, Pavel NV, Galantini L. Twisted nanoribbons from a RGD-bearing cholic acid derivative. Colloids Surf B Biointerfaces 2017; 159:183-190. [PMID: 28787634 DOI: 10.1016/j.colsurfb.2017.07.084] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Revised: 07/05/2017] [Accepted: 07/29/2017] [Indexed: 11/16/2022]
Abstract
In light of the biomedical interest for self-assembling amphiphiles bearing the tripeptide Arg-Gly-Gly (RGD), a cholic acid derivative was synthesized by introducing an aromatic moiety on the steroidal skeleton and the RGD sequence on the carboxylic function of its chain 17-24, thus forming a peptide amphiphile with the unconventional rigid amphiphilic structure of bile salts. In aqueous solution, the compound self-assembled into long twisted ribbons characterized by a very low degree of polydispersity in terms of width (≈25nm), thickness (≈4.5nm) and pitch (≈145nm). It was proposed that in the ribbon the molecules are arranged in a bilayer structure with the aromatic moieties in the interior, strongly involved in the intermolecular interaction, whereas the RGD residues are located at the bilayer-water interface. The nanostructure is significantly different from those generally provided by RGD-containing amphiphiles with the conventional peptide-tail structure, for which fibers with a circular cross-section were observed, and successfully tested as scaffolds for tissue regeneration. From previous work on the use of this kind of nanostructures, it is known that features like morphology, rigidity, epitope spacing and periodicity are important factors that dramatically affect cell adhesion and signaling. Within this context, the reported results demonstrate that bile salt-based peptide surfactants are promising building blocks in the preparation of non-trivial RGD-decorated nanoaggregates with well-defined morphologies and epitope distributions.
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Affiliation(s)
- Leana Travaglini
- Department of Chemistry, Sapienza University of Rome, P.le A. Moro 5, 00185 Rome, Italy
| | - Cesare Giordano
- Institute of Molecular Biology and Pathology, CNR, P.le A. Moro 5, 00185 Roma, Italy
| | - Andrea D'Annibale
- Department of Chemistry, Sapienza University of Rome, P.le A. Moro 5, 00185 Rome, Italy
| | - Marta Gubitosi
- Department of Chemistry, Sapienza University of Rome, P.le A. Moro 5, 00185 Rome, Italy
| | | | - Karin Schillén
- Division of Physical Chemistry, Department of Chemistry, Center for Chemistry and Chemical Engineering, Lund University, SE-221 00 Lund, Sweden
| | - Azzurra Stefanucci
- Department of Pharmacy, University of Chieti-Pescara "G. d'Annunzio", Via dei Vestini 31, 66100 Chieti, Italy
| | - Adriano Mollica
- Department of Pharmacy, University of Chieti-Pescara "G. d'Annunzio", Via dei Vestini 31, 66100 Chieti, Italy
| | - Nicolae Viorel Pavel
- Department of Chemistry, Sapienza University of Rome, P.le A. Moro 5, 00185 Rome, Italy
| | - Luciano Galantini
- Department of Chemistry, Sapienza University of Rome, P.le A. Moro 5, 00185 Rome, Italy.
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47
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Wei G, Su Z, Reynolds NP, Arosio P, Hamley IW, Gazit E, Mezzenga R. Self-assembling peptide and protein amyloids: from structure to tailored function in nanotechnology. Chem Soc Rev 2017; 46:4661-4708. [PMID: 28530745 PMCID: PMC6364806 DOI: 10.1039/c6cs00542j] [Citation(s) in RCA: 535] [Impact Index Per Article: 76.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Self-assembled peptide and protein amyloid nanostructures have traditionally been considered only as pathological aggregates implicated in human neurodegenerative diseases. In more recent times, these nanostructures have found interesting applications as advanced materials in biomedicine, tissue engineering, renewable energy, environmental science, nanotechnology and material science, to name only a few fields. In all these applications, the final function depends on: (i) the specific mechanisms of protein aggregation, (ii) the hierarchical structure of the protein and peptide amyloids from the atomistic to mesoscopic length scales and (iii) the physical properties of the amyloids in the context of their surrounding environment (biological or artificial). In this review, we will discuss recent progress made in the field of functional and artificial amyloids and highlight connections between protein/peptide folding, unfolding and aggregation mechanisms, with the resulting amyloid structure and functionality. We also highlight current advances in the design and synthesis of amyloid-based biological and functional materials and identify new potential fields in which amyloid-based structures promise new breakthroughs.
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Affiliation(s)
- Gang Wei
- Faculty of Production Engineering, University of Bremen, Bremen,
Germany
| | - Zhiqiang Su
- State Key Laboratory of Chemical Resource Engineering, Beijing
University of Chemical Technology, China
| | - Nicholas P. Reynolds
- ARC Training Centre for Biodevices, Swinburne University of
Technology, Melbourne, Australia
| | - Paolo Arosio
- Department of Chemistry and Applied Biosciences, ETH-Zurich,
Switzerland
| | | | - Ehud Gazit
- Faculty of Life Sciences, Tel Aviv University, Israel
| | - Raffaele Mezzenga
- Department of Health Science and Technology, ETH-Zurich,
Switzerland
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48
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Pizzi A, Pigliacelli C, Gori A, Ikkala O, Demitri N, Terraneo G, Castelletto V, Hamley IW, Baldelli Bombelli F, Metrangolo P. Halogenation dictates the architecture of amyloid peptide nanostructures. NANOSCALE 2017; 9:9805-9810. [PMID: 28696473 PMCID: PMC5708343 DOI: 10.1039/c7nr03263c] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Amyloid peptides yield a plethora of interesting nanostructures though difficult to control. Here we report that depending on the number, position, and nature of the halogen atoms introduced into either one or both phenylalanine benzene rings of the amyloid β peptide-derived core-sequence KLVFF, four different architectures were obtained in a controlled manner. Our findings demonstrate that halogenation may develop as a general strategy to engineer amyloidal peptide self-assembly and obtain new amyloidal nanostructures.
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Affiliation(s)
- Andrea Pizzi
- Laboratory of Supramolecular and BioNano Materials (SupraBioNanoLab), Department of Chemistry, Materials, and Chemical Engineering "Giulio Natta", Politecnico di Milano, Via Luigi Mancinelli 7, Milano I-20131, Italy.
| | | | - Alessandro Gori
- Istituto di Chimica del Riconoscimento Molecolare - National Research Council of Italy (ICRM-CNR), Laboratory of Peptide and Protein Chemistry, Via Mario Bianco 9, 20131 Milano, Italy
| | - Olli Ikkala
- Department of Applied Physics, Aalto University, Espoo, FI-02150, Finland
| | - Nicola Demitri
- Elettra - Sincrotrone Trieste, S.S. 14 Km 163.5 in Area Science Park, 34149 Basovizza - Trieste, Italy
| | - Giancarlo Terraneo
- Laboratory of Supramolecular and BioNano Materials (SupraBioNanoLab), Department of Chemistry, Materials, and Chemical Engineering "Giulio Natta", Politecnico di Milano, Via Luigi Mancinelli 7, Milano I-20131, Italy.
| | - Valeria Castelletto
- Department of Chemistry, University of Reading, Whiteknights, Reading, RG6 6AD, UK
| | - Ian W Hamley
- Department of Chemistry, University of Reading, Whiteknights, Reading, RG6 6AD, UK
| | - Francesca Baldelli Bombelli
- Laboratory of Supramolecular and BioNano Materials (SupraBioNanoLab), Department of Chemistry, Materials, and Chemical Engineering "Giulio Natta", Politecnico di Milano, Via Luigi Mancinelli 7, Milano I-20131, Italy.
| | - Pierangelo Metrangolo
- Laboratory of Supramolecular and BioNano Materials (SupraBioNanoLab), Department of Chemistry, Materials, and Chemical Engineering "Giulio Natta", Politecnico di Milano, Via Luigi Mancinelli 7, Milano I-20131, Italy. and Department of Applied Physics, Aalto University, Espoo, FI-02150, Finland and Istituto di Chimica del Riconoscimento Molecolare - National Research Council of Italy (ICRM-CNR), Laboratory of Peptide and Protein Chemistry, Via Mario Bianco 9, 20131 Milano, Italy
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49
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Hayward S, Milner-White EJ. Geometrical principles of homomeric β-barrels and β-helices: Application to modeling amyloid protofilaments. Proteins 2017. [PMID: 28646497 DOI: 10.1002/prot.25341] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Examples of homomeric β-helices and β-barrels have recently emerged. Here we generalize the theory for the shear number in β-barrels to encompass β-helices and homomeric structures. We introduce the concept of the "β-strip," the set of parallel or antiparallel neighboring strands, from which the whole helix can be generated giving it n-fold rotational symmetry. In this context, the shear number is interpreted as the sum around the helix of the fixed register shift between neighboring identical β-strips. Using this approach, we have derived relationships between helical width, pitch, angle between strand direction and helical axis, mass per length, register shift, and number of strands. The validity and unifying power of the method is demonstrated with known structures including α-hemolysin, T4 phage spike, cylindrin, and the HET-s(218-289) prion. From reported dimensions measured by X-ray fiber diffraction on amyloid fibrils, the relationships can be used to predict the register shift and the number of strands within amyloid protofilaments. This was used to construct models of transthyretin and Alzheimer β(40) amyloid protofilaments that comprise a single strip of in-register β-strands folded into a "β-strip helix." Results suggest both stabilization of an individual β-strip helix and growth by addition of further β-strip helices can involve the same pair of sequence segments associating with β-sheet hydrogen bonding at the same register shift. This process would be aided by a repeat sequence. Hence, understanding how the register shift (as the distance between repeat sequences) relates to helical dimensions will be useful for nanotube design.
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Affiliation(s)
- Steven Hayward
- D'Arcy Thompson Centre for Computational Biology, School of Computing Sciences, University of East Anglia, Norwich, NR4 7TJ, United Kingdom
| | - E James Milner-White
- College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
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50
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Rajbhandary A, Raymond DM, Nilsson BL. Self-Assembly, Hydrogelation, and Nanotube Formation by Cation-Modified Phenylalanine Derivatives. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:5803-5813. [PMID: 28514156 DOI: 10.1021/acs.langmuir.7b00686] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Fluorenylmethoxycarbonyl-protected phenylalanine (Fmoc-Phe) derivatives are a privileged class of molecule that spontaneously self-assemble into hydrogel fibril networks. Fmoc-Phe-derived hydrogels are typically formed by dilution of the hydrogelator from an organic cosolvent into water, by dissolution of the hydrogelator under basic aqueous conditions followed by adjustment of the pH with acid, or by other external triggering forces, including sonication and heating. These conditions complicate biological applications of these hydrogels. Herein, we report C-terminal cation-modified Fmoc-Phe derivatives that are positively charged across a broad range of pH values and that can self-assemble and form hydrogel networks spontaneously without the need to adjust pH or to use an organic cosolvent. In addition, these cationic Fmoc-Phe derivatives are found to self-assemble into novel sheet-based nanotube structures at higher concentrations. These nanotube structures are unique to C-terminal cationic Fmoc-Phe derivatives; the parent Fmoc-Phe carboxylic acids form only fibril or worm-like micelle structures. Nanotube formation by the cationic Fmoc-Phe molecules is dependent on positive charge at the C-terminus, since at basic pH where the positive charge is reduced only fibrils/worm-like micelles are formed and nanotube formation is suppressed. These studies provide an important example of Fmoc-Phe derivatives that can elicit hydrogelation without organic cosolvent or pH modification and also provide insight into how subtle modification of structure can perturb the self-assembly pathways of Fmoc-Phe derivatives.
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Affiliation(s)
- Annada Rajbhandary
- Department of Chemistry, University of Rochester , Rochester, New York 14627-0216, United States
| | - Danielle M Raymond
- Department of Chemistry, University of Rochester , Rochester, New York 14627-0216, United States
| | - Bradley L Nilsson
- Department of Chemistry, University of Rochester , Rochester, New York 14627-0216, United States
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