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Stanojlovic V, Müller A, Moazzam A, Hinterholzer A, Ożga K, Berlicki Ł, Schubert M, Cabrele C. A Conformationally Stable Acyclic β-Hairpin Scaffold Tolerating the Incorporation of Poorly β-Sheet-Prone Amino Acids. Chembiochem 2021; 23:e202100604. [PMID: 34856053 PMCID: PMC9299858 DOI: 10.1002/cbic.202100604] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 11/30/2021] [Indexed: 11/09/2022]
Abstract
The β-hairpin is a structural element of native proteins, but it is also a useful artificial scaffold for finding lead compounds to convert into peptidomimetics or non-peptide structures for drug discovery. Since linear peptides are synthetically more easily accessible than cyclic ones, but are structurally less well-defined, we propose XWXWXpPXK(/R)X(R) as an acyclic but still rigid β-hairpin scaffold that is robust enough to accommodate different types of side chains, regardless of the secondary-structure propensity of the X residues. The high conformational stability of the scaffold results from tight contacts between cross-strand cationic and aromatic side chains, combined with the strong tendency of the d-Pro-l-Pro dipeptide to induce a type II' β-turn. To demonstrate the robustness of the scaffold, we elucidated the NMR structures and performed molecular dynamics (MD) simulations of a series of peptides displaying mainly non-β-branched, poorly β-sheet-prone residues at the X positions. Both the NMR and MD data confirm that our acyclic β-hairpin scaffold is highly versatile as regards the amino-acid composition of the β-sheet face opposite to the cationic-aromatic one.
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Affiliation(s)
- Vesna Stanojlovic
- Department of Biosciences, University of Salzburg, Hellbrunnerstrasse 34, 5020, Salzburg, Austria
| | - Anna Müller
- Department of Biosciences, University of Salzburg, Hellbrunnerstrasse 34, 5020, Salzburg, Austria
| | - Ali Moazzam
- Department of Biosciences, University of Salzburg, Hellbrunnerstrasse 34, 5020, Salzburg, Austria.,School of Chemistry, College of Science, University of Tehran, P.O. Box 14155-6619, Tehran, Iran
| | - Arthur Hinterholzer
- Department of Biosciences, University of Salzburg, Hellbrunnerstrasse 34, 5020, Salzburg, Austria
| | - Katarzyna Ożga
- Department of Bioorganic Chemistry, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370, Wrocław, Poland
| | - Łukasz Berlicki
- Department of Bioorganic Chemistry, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370, Wrocław, Poland
| | - Mario Schubert
- Department of Biosciences, University of Salzburg, Hellbrunnerstrasse 34, 5020, Salzburg, Austria
| | - Chiara Cabrele
- Department of Biosciences, University of Salzburg, Hellbrunnerstrasse 34, 5020, Salzburg, Austria
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2
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Second-generation DNA-encoded multiple display on a constant macrocyclic scaffold enabled by an orthogonal protecting group strategy. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.09.041] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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3
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Sanchez Perez E, Toor R, Bruyat P, Cepeda C, Degardin M, Dejeu J, Boturyn D, Coche-Guérente L. Impact of Multimeric Ferrocene-containing Cyclodecapeptide Scaffold on Host-Guest Interactions at a β-Cyclodextrin Covered Surface. Chemphyschem 2021; 22:2231-2239. [PMID: 34397150 DOI: 10.1002/cphc.202100469] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 08/05/2021] [Indexed: 11/07/2022]
Abstract
Among non-covalent bonds, the host-guest interaction is an attractive way to attach biomolecules to solid surfaces since the binding strength can be tuned by the nature of host and guest partners or through the valency of the interaction. For that purpose, we synthesized cyclodecapeptide scaffolds exhibiting in a spatially controlled manner two independent domains enabling the multimeric presentation of guest molecules on one face and the other face enabling the potential grafting of a biomolecule of interest. In this work, we were interested in the β-cyclodextrin/ferrocene inclusion complex formed on β-CD monolayers functionalized surfaces. By using surface sensitive techniques such as quartz crystal microbalance and surface plasmon resonance, we quantified the influence of the guest valency on the stability of the inclusion complexes. The results show a drastic enhancement of the affinity with the gradual increase of guest valency. Considering that the sequential binding events are equal and independent, we applied the multivalent model developed by the Huskens group to extract intrinsic binding constants and an effective concentration of host.
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Affiliation(s)
- Enrique Sanchez Perez
- Department of Molecular Chemistry, Univ. Grenoble-Alpes, CNRS, DCM UMR 5250, CS 40700, 38058, Grenoble Cedex 9, France
| | - Ritu Toor
- Department of Molecular Chemistry, Univ. Grenoble-Alpes, CNRS, DCM UMR 5250, CS 40700, 38058, Grenoble Cedex 9, France
| | - Pierrick Bruyat
- Department of Molecular Chemistry, Univ. Grenoble-Alpes, CNRS, DCM UMR 5250, CS 40700, 38058, Grenoble Cedex 9, France
| | - Céline Cepeda
- Department of Molecular Chemistry, Univ. Grenoble-Alpes, CNRS, DCM UMR 5250, CS 40700, 38058, Grenoble Cedex 9, France
| | - Mélissa Degardin
- Department of Molecular Chemistry, Univ. Grenoble-Alpes, CNRS, DCM UMR 5250, CS 40700, 38058, Grenoble Cedex 9, France
| | - Jérôme Dejeu
- Department of Molecular Chemistry, Univ. Grenoble-Alpes, CNRS, DCM UMR 5250, CS 40700, 38058, Grenoble Cedex 9, France
| | - Didier Boturyn
- Department of Molecular Chemistry, Univ. Grenoble-Alpes, CNRS, DCM UMR 5250, CS 40700, 38058, Grenoble Cedex 9, France
| | - Liliane Coche-Guérente
- Department of Molecular Chemistry, Univ. Grenoble-Alpes, CNRS, DCM UMR 5250, CS 40700, 38058, Grenoble Cedex 9, France
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Pieniężna A, Kotynia A, Brasuń J. The Unusual Role of Pro in Cu(II) Binding by His 2-Cyclopentapeptide. Int J Mol Sci 2021; 22:ijms22126628. [PMID: 34205682 PMCID: PMC8235444 DOI: 10.3390/ijms22126628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 06/10/2021] [Accepted: 06/15/2021] [Indexed: 11/28/2022] Open
Abstract
In this paper, we present findings from studying the interaction of copper(II) ions with the His2-cyclopentapeptide and the role of proline used for the purpose of potentiometric titration and UV-Vis, CD and EPR spectroscopic measurements. Experiments of two homodetic peptides differing by one amino acid residue were conducted for a ligand to metal ratio of 1:1 in the pH range 2.5–11.0. The presented studies reveal that peptides form only mononuclear complexes, and the CuH2L complex appears in the system first (for both L1 and L2). Study results show that the presence of Pro influences the structure of formed complexes and their stabilities and has a strong impact on the efficiency of copper(II) coordination.
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Kunig VBK, Potowski M, Klika Škopić M, Brunschweiger A. Scanning Protein Surfaces with DNA-Encoded Libraries. ChemMedChem 2021; 16:1048-1062. [PMID: 33295694 PMCID: PMC8048995 DOI: 10.1002/cmdc.202000869] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Indexed: 12/17/2022]
Abstract
Understanding the ligandability of a target protein, defined as the capability of a protein to bind drug-like compounds on any site, can give important stimuli to drug-development projects. For instance, inhibition of protein-protein interactions usually depends on the identification of protein surface binders. DNA-encoded chemical libraries (DELs) allow scanning of protein surfaces with large chemical space. Encoded library selection screens uncovered several protein-protein interaction inhibitors and compounds binding to the surface of G protein-coupled receptors (GPCRs) and kinases. The protein surface-binding chemotypes from DELs are predominantly chemically modified and cyclized peptides, and functional small-molecule peptidomimetics. Peptoid libraries and structural peptidomimetics have been less studied in the DEL field, hinting at hitherto less populated chemical space and suggesting alternative library designs. Roughly a third of bioactive molecules evolved from smaller, target-focused libraries. They showcase the potential of encoded libraries to identify more potent molecules from weak, for example, fragment-like, starting points.
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Affiliation(s)
- Verena B. K. Kunig
- Faculty of Chemistry and Chemical BiologyTU Dortmund UniversityOtto-Hahn-Straße 644227DortmundGermany
| | - Marco Potowski
- Faculty of Chemistry and Chemical BiologyTU Dortmund UniversityOtto-Hahn-Straße 644227DortmundGermany
| | - Mateja Klika Škopić
- Faculty of Chemistry and Chemical BiologyTU Dortmund UniversityOtto-Hahn-Straße 644227DortmundGermany
| | - Andreas Brunschweiger
- Faculty of Chemistry and Chemical BiologyTU Dortmund UniversityOtto-Hahn-Straße 644227DortmundGermany
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Pifferi C, Ruiz-de-Angulo A, Goyard D, Tiertant C, Sacristán N, Barriales D, Berthet N, Anguita J, Renaudet O, Fernández-Tejada A. Chemical synthesis and immunological evaluation of new generation multivalent anticancer vaccines based on a Tn antigen analogue. Chem Sci 2020; 11:4488-4498. [PMID: 34122907 PMCID: PMC8159477 DOI: 10.1039/d0sc00544d] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Tumor associated carbohydrate antigens (TACAs), such as the Tn antigen, have emerged as key targets for the development of synthetic anticancer vaccines. However, the induction of potent and functional immune responses has been challenging and, in most cases, unsuccessful. Herein, we report the design, synthesis and immunological evaluation in mice of Tn-based vaccine candidates with multivalent presentation of the Tn antigen (up to 16 copies), both in its native serine-linked display (Tn-Ser) and as an oxime-linked Tn analogue (Tn-oxime). The high valent vaccine prototypes were synthesized through a late-stage convergent assembly (Tn-Ser construct) and a versatile divergent strategy (Tn-oxime analogue), using chemoselective click-type chemistry. The hexadecavalent Tn-oxime construct induced robust, Tn-specific humoral and CD4+/CD8+ cellular responses, with antibodies able to bind the Tn antigen on the MCF7 cancer cell surface. The superior synthetic accessibility and immunological properties of this fully-synthetic vaccine prototype makes it a compelling candidate for further advancement towards safe and effective synthetic anticancer vaccines.
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Affiliation(s)
- Carlo Pifferi
- Département de Chimie Moléculaire, Université Grenoble Alpes, UMR 5250, CNRS 38000 Grenoble France .,Chemical Immunology Lab, CIC bioGUNE Biscay Science and Technology Park, Building 801A 48160 Derio Spain
| | - Ane Ruiz-de-Angulo
- Chemical Immunology Lab, CIC bioGUNE Biscay Science and Technology Park, Building 801A 48160 Derio Spain
| | - David Goyard
- Département de Chimie Moléculaire, Université Grenoble Alpes, UMR 5250, CNRS 38000 Grenoble France
| | - Claire Tiertant
- Département de Chimie Moléculaire, Université Grenoble Alpes, UMR 5250, CNRS 38000 Grenoble France
| | - Nagore Sacristán
- Chemical Immunology Lab, CIC bioGUNE Biscay Science and Technology Park, Building 801A 48160 Derio Spain
| | - Diego Barriales
- Inflammation and Macrophage Plasticity Lab, CIC bioGUNE Biscay Science and Technology Park, Building 801A 48160 Derio Spain
| | - Nathalie Berthet
- Département de Chimie Moléculaire, Université Grenoble Alpes, UMR 5250, CNRS 38000 Grenoble France
| | - Juan Anguita
- Inflammation and Macrophage Plasticity Lab, CIC bioGUNE Biscay Science and Technology Park, Building 801A 48160 Derio Spain .,Ikerbasque, Basque Foundation for Science Maria Diaz de Haro 13 48009 Bilbao Spain
| | - Olivier Renaudet
- Département de Chimie Moléculaire, Université Grenoble Alpes, UMR 5250, CNRS 38000 Grenoble France
| | - Alberto Fernández-Tejada
- Chemical Immunology Lab, CIC bioGUNE Biscay Science and Technology Park, Building 801A 48160 Derio Spain .,Ikerbasque, Basque Foundation for Science Maria Diaz de Haro 13 48009 Bilbao Spain
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Garai A, Delangle P. Recent advances in uranyl binding in proteins thanks to biomimetic peptides. J Inorg Biochem 2019; 203:110936. [PMID: 31864150 DOI: 10.1016/j.jinorgbio.2019.110936] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Revised: 11/05/2019] [Accepted: 11/17/2019] [Indexed: 12/29/2022]
Abstract
Uranium is an element belonging to the actinide series. It is ubiquitous in rock, soil, and water. Uranium is found in the ecosystem due to mining and milling industrial activities and processing to nuclear fuel, but also to the extensive use of phosphate fertilizers. Understanding uranium binding in vivo is critical, first to deepen our knowledge of molecular events leading to chemical toxicity, but also to provide new mechanistic information useful for the development of efficient decorporation treatments to be applied in case of intoxication. The most stable form in physiological conditions is the uranyl cation (UO22+), in which uranium oxidation state is +VI. This short review presents uranyl coordination properties and chelation, and what is currently known about uranium binding to proteins. Although several target proteins have been identified, the UO22+ binding sites have barely been identified. Biomimetic approaches using model peptides are good options to shed light on high affinity uranyl binding sites in proteins. A strategy based on constrained cyclodecapeptides allowed recently to propose a tetraphosphate binding site for uranyl that provides an affinity similar to the one measured with the phosphoprotein osteopontin.
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Affiliation(s)
- Aditya Garai
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, SyMMES, F-38000 Grenoble, France
| | - Pascale Delangle
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, SyMMES, F-38000 Grenoble, France.
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8
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Li Y, De Luca R, Cazzamalli S, Pretto F, Bajic D, Scheuermann J, Neri D. Versatile protein recognition by the encoded display of multiple chemical elements on a constant macrocyclic scaffold. Nat Chem 2018; 10:441-448. [PMID: 29556050 PMCID: PMC6044424 DOI: 10.1038/s41557-018-0017-8] [Citation(s) in RCA: 102] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2017] [Accepted: 01/04/2018] [Indexed: 11/09/2022]
Abstract
In nature, specific antibodies can be generated as a result of an adaptive selection and expansion of lymphocytes with suitable protein binding properties. We attempted to mimic antibody-antigen recognition by displaying multiple chemical diversity elements on a defined macrocyclic scaffold. Encoding of the displayed combinations was achieved using distinctive DNA tags, resulting in a library size of 35,393,112. Specific binders could be isolated against a variety of proteins, including carbonic anhydrase IX, horseradish peroxidase, tankyrase 1, human serum albumin, alpha-1 acid glycoprotein, calmodulin, prostate-specific antigen and tumour necrosis factor. Similar to antibodies, the encoded display of multiple chemical elements on a constant scaffold enabled practical applications, such as fluorescence microscopy procedures or the selective in vivo delivery of payloads to tumours. Furthermore, the versatile structure of the scaffold facilitated the generation of protein-specific chemical probes, as illustrated by photo-crosslinking.
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Affiliation(s)
- Yizhou Li
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Shapingba, Chongqing, China
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology (ETH Zürich), Zürich, Switzerland
| | - Roberto De Luca
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology (ETH Zürich), Zürich, Switzerland
| | - Samuele Cazzamalli
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology (ETH Zürich), Zürich, Switzerland
| | | | - Davor Bajic
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology (ETH Zürich), Zürich, Switzerland
| | - Jörg Scheuermann
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology (ETH Zürich), Zürich, Switzerland.
| | - Dario Neri
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology (ETH Zürich), Zürich, Switzerland.
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9
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Pifferi C, Berthet N, Renaudet O. Cyclopeptide scaffolds in carbohydrate-based synthetic vaccines. Biomater Sci 2018; 5:953-965. [PMID: 28275765 DOI: 10.1039/c7bm00072c] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Cyclopeptides have been recently used successfully as carriers for the multivalent presentation of carbohydrate and peptide antigens in immunotherapy. Beside their synthetic versatility, these scaffolds are indeed interesting due to their stability against enzyme degradation and low immunogenicity. This mini-review highlights the recent advances in the utilization of cyclopeptides to prepare fully synthetic vaccines prototypes against cancers and pathogens.
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Affiliation(s)
- Carlo Pifferi
- Univ. Grenoble Alpes, CNRS, DCM UMR 5250, F-38000 Grenoble, France.
| | - Nathalie Berthet
- Univ. Grenoble Alpes, CNRS, DCM UMR 5250, F-38000 Grenoble, France.
| | - Olivier Renaudet
- Univ. Grenoble Alpes, CNRS, DCM UMR 5250, F-38000 Grenoble, France. and Institut Universitaire de France, 103 boulevard Saint-Michel, 75005 Paris, France
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10
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Bartolami E, Knoops J, Bessin Y, Fossépré M, Chamieh J, Dumy P, Surin M, Ulrich S. One-Pot Self-Assembly of Peptide-Based Cage-Type Nanostructures Using Orthogonal Ligations. Chemistry 2017; 23:14323-14331. [DOI: 10.1002/chem.201702974] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Indexed: 01/14/2023]
Affiliation(s)
- Eline Bartolami
- Institut des Biomolécules Max Mousseron (IBMM), UMR 5247, CNRS, Université de Montpellier, ENSCM; Ecole Nationale Supérieure de Chimie de Montpellier; 8 Rue de l'Ecole Normale 34296 Montpellier cedex 5 France
- Present address: Department of Organic Chemistry; University of Geneva; 30 Quai Ernest Ansermet 1211 Geneva 4 Switzerland
| | - Jérémie Knoops
- Laboratory for Chemistry of Novel Materials; University of Mons-UMONS; 20, Place du Parc 7000 Mons Belgium
| | - Yannick Bessin
- Institut des Biomolécules Max Mousseron (IBMM), UMR 5247, CNRS, Université de Montpellier, ENSCM; Ecole Nationale Supérieure de Chimie de Montpellier; 8 Rue de l'Ecole Normale 34296 Montpellier cedex 5 France
| | - Mathieu Fossépré
- Laboratory for Chemistry of Novel Materials; University of Mons-UMONS; 20, Place du Parc 7000 Mons Belgium
| | - Joseph Chamieh
- Institut des Biomolécules Max Mousseron (IBMM), UMR 5247, CNRS, Université de Montpellier, ENSCM; Ecole Nationale Supérieure de Chimie de Montpellier; 8 Rue de l'Ecole Normale 34296 Montpellier cedex 5 France
| | - Pascal Dumy
- Institut des Biomolécules Max Mousseron (IBMM), UMR 5247, CNRS, Université de Montpellier, ENSCM; Ecole Nationale Supérieure de Chimie de Montpellier; 8 Rue de l'Ecole Normale 34296 Montpellier cedex 5 France
| | - Mathieu Surin
- Laboratory for Chemistry of Novel Materials; University of Mons-UMONS; 20, Place du Parc 7000 Mons Belgium
| | - Sébastien Ulrich
- Institut des Biomolécules Max Mousseron (IBMM), UMR 5247, CNRS, Université de Montpellier, ENSCM; Ecole Nationale Supérieure de Chimie de Montpellier; 8 Rue de l'Ecole Normale 34296 Montpellier cedex 5 France
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11
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Kanfar N, Tanc M, Dumy P, Supuran CT, Ulrich S, Winum JY. Effective Access to Multivalent Inhibitors of Carbonic Anhydrases Promoted by Peptide Bioconjugation. Chemistry 2017; 23:6788-6794. [DOI: 10.1002/chem.201700241] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Nasreddine Kanfar
- Institut des Biomolécules Max Mousseron, IBMM, UMR 5247 CNRS, ENSCM; Université de Montpellier; 8 rue de l'Ecole Normale 34296 Montpellier Cedex France
| | - Muhammet Tanc
- Neurofarba Department; Section of Pharmaceutical and Nutriceutical Sciences; Università degli Studi di Firenze; Via Ugo Schiff 6 50019 Sesto Fiorentino Florence Italy
| | - Pascal Dumy
- Institut des Biomolécules Max Mousseron, IBMM, UMR 5247 CNRS, ENSCM; Université de Montpellier; 8 rue de l'Ecole Normale 34296 Montpellier Cedex France
| | - Claudiu T. Supuran
- Neurofarba Department; Section of Pharmaceutical and Nutriceutical Sciences; Università degli Studi di Firenze; Via Ugo Schiff 6 50019 Sesto Fiorentino Florence Italy
| | - Sébastien Ulrich
- Institut des Biomolécules Max Mousseron, IBMM, UMR 5247 CNRS, ENSCM; Université de Montpellier; 8 rue de l'Ecole Normale 34296 Montpellier Cedex France
| | - Jean-Yves Winum
- Institut des Biomolécules Max Mousseron, IBMM, UMR 5247 CNRS, ENSCM; Université de Montpellier; 8 rue de l'Ecole Normale 34296 Montpellier Cedex France
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12
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Engineering Short Preorganized Peptide Sequences for Metal Ion Coordination: Copper(II) a Case Study. Methods Enzymol 2016. [PMID: 27586340 DOI: 10.1016/bs.mie.2016.04.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Peptides are multidentate chiral ligands capable of coordinating different metal ions. Nowadays, they can be obtained with high yield and purity, thanks to the advances on peptide/protein chemistry as well as in equipment (peptide synthesizers). Based on the identity and length of their amino acid sequences, peptides can present different degrees of flexibility and folding. Although short peptide sequences (<20 amino acids) usually lack structure in solution, different levels of structural preorganization can be induced by introducing conformational constraints, such as β-turn/loop template sequences and backbone cyclization. For all these reasons, and the fact that one is not restricted to use proteinogenic amino acids, small peptidic scaffolds constitute a simple and versatile platform for the development of inorganic systems with tailor-made properties and functions. Here we outline a general approach to the design of short preorganized peptide sequences (10-16 amino acids) for metal ion coordination. Based on our experience, we present a general scheme for the design, synthesis, and characterization of these peptidic scaffolds and provide protocols for the study of their metal ion coordination properties.
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13
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Zelli R, Bartolami E, Longevial JF, Bessin Y, Dumy P, Marra A, Ulrich S. A metal-free synthetic approach to peptide-based iminosugar clusters as novel multivalent glycosidase inhibitors. RSC Adv 2016. [DOI: 10.1039/c5ra20420h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Oxime ligation allowed the preparation of a set of iminosugar clusters from which new Jack bean α-mannosidase inhibitors were identified.
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Affiliation(s)
- Renaud Zelli
- Institut des Biomolécules Max Mousseron (IBMM)
- UMR 5247
- CNRS
- Université de Montpellier
- Ecole Nationale Supérieure de Chimie de Montpellier
| | - Eline Bartolami
- Institut des Biomolécules Max Mousseron (IBMM)
- UMR 5247
- CNRS
- Université de Montpellier
- Ecole Nationale Supérieure de Chimie de Montpellier
| | - Jean-François Longevial
- Institut des Biomolécules Max Mousseron (IBMM)
- UMR 5247
- CNRS
- Université de Montpellier
- Ecole Nationale Supérieure de Chimie de Montpellier
| | - Yannick Bessin
- Institut des Biomolécules Max Mousseron (IBMM)
- UMR 5247
- CNRS
- Université de Montpellier
- Ecole Nationale Supérieure de Chimie de Montpellier
| | - Pascal Dumy
- Institut des Biomolécules Max Mousseron (IBMM)
- UMR 5247
- CNRS
- Université de Montpellier
- Ecole Nationale Supérieure de Chimie de Montpellier
| | - Alberto Marra
- Institut des Biomolécules Max Mousseron (IBMM)
- UMR 5247
- CNRS
- Université de Montpellier
- Ecole Nationale Supérieure de Chimie de Montpellier
| | - Sébastien Ulrich
- Institut des Biomolécules Max Mousseron (IBMM)
- UMR 5247
- CNRS
- Université de Montpellier
- Ecole Nationale Supérieure de Chimie de Montpellier
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14
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Fragoso A, Carvalho T, Rousselot-Pailley P, Correia dos Santos MM, Delgado R, Iranzo O. Effect of the Peptidic Scaffold in Copper(II) Coordination and the Redox Properties of Short Histidine-Containing Peptides. Chemistry 2015; 21:13100-11. [DOI: 10.1002/chem.201501715] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Indexed: 01/07/2023]
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15
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Bartolami E, Bessin Y, Gervais V, Dumy P, Ulrich S. Dynamic Expression of DNA Complexation with Self-assembled Biomolecular Clusters. Angew Chem Int Ed Engl 2015; 54:10183-7. [DOI: 10.1002/anie.201504047] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 06/11/2015] [Indexed: 12/18/2022]
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16
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Bartolami E, Bessin Y, Gervais V, Dumy P, Ulrich S. Dynamic Expression of DNA Complexation with Self-assembled Biomolecular Clusters. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201504047] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Bartocci S, Mazzier D, Moretto A, Mba M. A peptide topological template for the dispersion of [60]fullerene in water. Org Biomol Chem 2015; 13:348-52. [DOI: 10.1039/c4ob02102a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Stable dispersions of [60]fullerene in water with concentrations of up to 1.3 mg mL−1 have been obtained using a peptide topological template as the carrier.
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Affiliation(s)
- S. Bartocci
- Department of Chemical Sciences
- University of Padova
- Padova
- Italy
| | - D. Mazzier
- Department of Chemical Sciences
- University of Padova
- Padova
- Italy
| | - A. Moretto
- Department of Chemical Sciences
- University of Padova
- Padova
- Italy
| | - M. Mba
- Department of Chemical Sciences
- University of Padova
- Padova
- Italy
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18
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Yang CT, Han J, Gu M, Liu J, Li Y, Huang Z, Yu HZ, Hu S, Wang X. Fluorescent recognition of uranyl ions by a phosphorylated cyclic peptide. Chem Commun (Camb) 2015; 51:11769-72. [DOI: 10.1039/c5cc04112k] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Fluorescent recognition of uranyl ions was achieved using a phosphorylated cyclic peptide, which can be used as a fluorescent sensor.
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Affiliation(s)
- Chu-Ting Yang
- Institute of Nuclear Physics and Chemistry
- China Academy of Engineering Physics
- Mianyang
- P. R. China
| | - Jun Han
- Institute of Nuclear Physics and Chemistry
- China Academy of Engineering Physics
- Mianyang
- P. R. China
| | - Mei Gu
- Institute of Nuclear Physics and Chemistry
- China Academy of Engineering Physics
- Mianyang
- P. R. China
| | - Jun Liu
- Institute of Nuclear Physics and Chemistry
- China Academy of Engineering Physics
- Mianyang
- P. R. China
| | - Yi Li
- Institute of Nuclear Physics and Chemistry
- China Academy of Engineering Physics
- Mianyang
- P. R. China
| | - Zeng Huang
- Institute of Nuclear Physics and Chemistry
- China Academy of Engineering Physics
- Mianyang
- P. R. China
| | - Hai-Zhu Yu
- Department of Chemistry and Center for Atomic Engineering of Advanced Materials
- Anhui University
- Hefei
- P. R. China
| | - Sheng Hu
- Institute of Nuclear Physics and Chemistry
- China Academy of Engineering Physics
- Mianyang
- P. R. China
| | - Xiaolin Wang
- Institute of Nuclear Physics and Chemistry
- China Academy of Engineering Physics
- Mianyang
- P. R. China
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19
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Lebrun C, Starck M, Gathu V, Chenavier Y, Delangle P. Engineering Short Peptide Sequences for Uranyl Binding. Chemistry 2014; 20:16566-73. [DOI: 10.1002/chem.201404546] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Indexed: 01/16/2023]
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20
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Fragoso A, Delgado R, Iranzo O. Copper(II) coordination properties of decapeptides containing three His residues: the impact of cyclization and Asp residue coordination. Dalton Trans 2013; 42:6182-92. [PMID: 23529654 DOI: 10.1039/c3dt32384f] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Two decapeptides containing three His and two Pro-Gly β-turn inducer units (C-Asn, cyclic) and three His and a single Pro-Gly unit (O-Asn, open) have been synthesized. A detailed potentiometric study showed that while O-Asn binds up to 3 equiv. of Cu(2+) ions, C-Asn only coordinates two before precipitation occurred. Nonetheless, at a 1 : 1 Cu(2+)/peptide ratio both peptides form a major [CuHL](3+) species and spectroscopic studies (UV-Vis, CD and EPR) revealed a very similar copper(ii) complex where the metal ion is coordinated solely by the imidazole rings of the His residues adopting a square planar or square pyramidal geometry. The corrected stability constants of the protonated species (log K(CuH(O-Asn)) = 8.17 and log K(CuH(C-Asn)) = 9.11) indicate that the cyclic peptide binds Cu(2+) with higher affinity and this value represents the highest value reported so far for this type of coordination. Additionally, the calculated value of the effective stability constant, K(eff), showed that C-Asn has a higher affinity for Cu(2+) at all pH values not only at a 1 : 1 ratio but even at a 2 : 1 ratio. The replacement of the asparagine residue by an aspartic amino acid increases the Cu(2+) affinity of the aspartic counterparts, C-Asp and O-Asp, which at a 1 : 1 Cu(2+)/peptide ratio also form a major species, [CuHL](2+) in these cases, with Cu(2+) coordinated to the three histidine residues and one aspartic residue. These data show how cyclization and coordination to the aspartic residue increase the binding strength and preclude the coordination of the amide nitrogen up to higher pH values, stabilizing therefore, the species where Cu(2+) is solely coordinated by the side chain functionalities.
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Affiliation(s)
- Ana Fragoso
- Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
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Fragoso A, Lamosa P, Delgado R, Iranzo O. Harnessing the flexibility of peptidic scaffolds to control their copper(II)-coordination properties: a potentiometric and spectroscopic study. Chemistry 2013; 19:2076-88. [PMID: 23293061 DOI: 10.1002/chem.201203545] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Indexed: 02/02/2023]
Abstract
Designing small peptides that are capable of binding Cu(2+) ions mainly through the side-chain functionalities is a hard task because the amide nitrogen atoms strongly compete for Cu(2+) ion coordination. However, the design of such peptides is important for obtaining biomimetic small systems of metalloenyzmes as well as for the development of artificial systems. With this in mind, a cyclic decapeptide, C-Asp, which contained three His residues and one Asp residue, and its linear derivative, O-Asp, were synthesized. The C-Asp peptide has two Pro-Gly β-turn-inducer units and, as a result of cyclization, and as shown by CD spectroscopy, its backbone is constrained into a more defined conformation than O-Asp, which is linear and contains a single Pro-Gly unit. A detailed potentiometric, mass spectrometric, and spectroscopic study (UV/Vis, CD, and EPR spectroscopy) showed that at a 1:1 Cu(2+)/peptide ratio, both peptides formed a major [CuHL](2+) species in the pH range 5.0-7.5 (C-Asp) and 5.5-7.0 (O-Asp). The corrected stability constants of the protonated species (log K*(CuH(O-Asp))=9.28 and log K*(CuH(C-Asp))=10.79) indicate that the cyclic peptide binds Cu(2+) ions with higher affinity. In addition, the calculated value of K(eff) shows that this higher affinity for Cu(2+) ions prevails at all pH values, not only for a 1:1 ratio but even for a 2:1 ratio. The spectroscopic data of both [CuHL](2+) species are consistent with the exclusive coordination of Cu(2+) ions by the side-chain functionalities of the three His residues and the Asp residue in a square-planar or square-pyramidal geometry. Nonetheless, although these data show that, upon metal coordination, both peptides adopt a similar fold, the larger conformational constraints that are present in the cyclic scaffold results in different behaviour for both [CuHL](2+) species. CD and NMR analysis revealed the formation of a more rigid structure and a slower Cu(2+)-exchange rate for [CuH(C-Asp)](2+) compared to [CuH(O-Asp](2+). This detailed comparative study shows that cyclization has a remarkable effect on the Cu(2+)-coordination properties of the C-Asp peptide, which binds Cu(2+) ions with higher affinity at all pH values, stabilizes the [CuHL](2+) species in a wider pH range, and has a slower Cu(2+)-exchange rate compared to O-Asp.
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Affiliation(s)
- Ana Fragoso
- Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
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22
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Delangle P, Mintz E. Chelation therapy in Wilson's disease: from D-penicillamine to the design of selective bioinspired intracellular Cu(I) chelators. Dalton Trans 2012; 41:6359-70. [PMID: 22327203 DOI: 10.1039/c2dt12188c] [Citation(s) in RCA: 102] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Wilson's disease is an orphan disease due to copper homeostasis dysfunction. Mutations of the ATP7B gene induces an impaired functioning of a Cu-ATPase, impaired Cu detoxification in the liver and copper overload in the body. Indeed, even though copper is an essential element, which is used as cofactor by many enzymes playing vital roles, it becomes toxic when in excess as it promotes cytotoxic reactions leading to oxidative stress. In this perspective, human copper homeostasis is first described in order to explain the mechanisms promoting copper overload in Wilson's disease. We will see that the liver is the main organ for copper distribution and detoxification in the body. Nowadays this disease is treated life-long by systemic chelation therapy, which is not satisfactory in many cases. Therefore the design of more selective and efficient drugs is of great interest. A strategy to design more specific chelators to treat localized copper accumulation in the liver will then be presented. In particular we will show how bioinorganic chemistry may help in the design of such novel chelators by taking inspiration from the biological copper cell transporters.
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Affiliation(s)
- Pascale Delangle
- INAC, Service de Chimie Inorganique et Biologique (UMR_E 3 CEA UJF), Commissariat à l'Energie Atomique, Grenoble, France.
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23
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Morelli L, Poletti L, Lay L. Carbohydrates and Immunology: Synthetic Oligosaccharide Antigens for Vaccine Formulation. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100296] [Citation(s) in RCA: 117] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Laura Morelli
- Dipartimento di Chimica Organica e Industriale, CISI and ISTM‐CNR, Università degli Studi di Milano, Via Venezian 21, 20133 Milano, Italy
| | - Laura Poletti
- Dipartimento di Chimica Organica e Industriale, CISI and ISTM‐CNR, Università degli Studi di Milano, Via Venezian 21, 20133 Milano, Italy
| | - Luigi Lay
- Dipartimento di Chimica Organica e Industriale, CISI and ISTM‐CNR, Università degli Studi di Milano, Via Venezian 21, 20133 Milano, Italy
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24
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Pujol AM, Cuillel M, Renaudet O, Lebrun C, Charbonnier P, Cassio D, Gateau C, Dumy P, Mintz E, Delangle P. Hepatocyte targeting and intracellular copper chelation by a thiol-containing glycocyclopeptide. J Am Chem Soc 2010; 133:286-96. [PMID: 21155609 DOI: 10.1021/ja106206z] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Metal overload plays an important role in several diseases or intoxications, like in Wilson's disease, a major genetic disorder of copper metabolism in humans. To efficiently and selectively decrease copper concentration in the liver that is highly damaged, chelators should be targeted at the hepatocytes. In the present work, we synthesized a molecule able to both lower intracellular copper, namely Cu(I), and target hepatocytes, combining within the same structure a chelating unit and a carbohydrate recognition element. A cyclodecapeptide scaffold displaying a controlled conformation with two independent faces was chosen to introduce both units. One face displays a cluster of carbohydrates to ensure an efficient recognition of the asialoglycoprotein receptors, expressed on the surface of hepatocytes. The second face is devoted to metal ion complexation thanks to the thiolate functions of two cysteine side-chains. To obtain a chelator that is active only once inside the cells, the two thiol functions were oxidized in a disulfide bridge to afford the glycopeptide P(3). Two simple cyclodecapeptides modeling the reduced and complexing form of P(3) in cells proved a high affinity for Cu(I) and a high selectivity with respect to Zn(II). As expected, P(3) becomes an efficient Cu(I) chelator in the presence of glutathione that mimics the intracellular reducing environment. Finally, cellular uptake and ability to lower intracellular copper were demonstrated in hepatic cell lines, in particular in WIF-B9, making P(3) a good candidate to fight copper overload in the liver.
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Affiliation(s)
- Anaïs M Pujol
- INAC, Service de Chimie Inorganique et Biologique (UMR_E 3 CEA UJF, FRE CNRS 3200), Commissariat à l'Energie Atomique, 17 Rue des Martyrs, 38054 Grenoble Cedex, France
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25
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Peptide and glycopeptide dendrimers and analogous dendrimeric structures and their biomedical applications. Amino Acids 2010; 40:301-70. [DOI: 10.1007/s00726-010-0707-z] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2010] [Accepted: 07/15/2010] [Indexed: 02/08/2023]
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26
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Freeman JO, Lee WC, Murphy MEP, Sherman JC. X-ray crystal analysis of a TASP: structural insights of a cavitein dimer. J Am Chem Soc 2009; 131:7421-9. [PMID: 19422242 DOI: 10.1021/ja901404w] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Cavitein Q4 is a template assembled synthetic protein designed for X-ray crystallographic analysis. It is based on a previous monomeric helical bundle cavitein (N1GG) that consists of four identical parallel helical peptides. Crystals that were grown in the presence of bromide ions were used to solve the initial phases via single-wavelength anomalous dispersion (SAD). A 1.4 A resolution data set was then refined starting with the SAD phases to provide the crystal structure of cavitein Q4. The crystal structure revealed cavitein Q4 as an asymmetric dimer, although the cavitein appears to be largely monomeric in solution. A comparative analysis is carried out to discern any intrinsic differences between Q4 and its parent cavitein N1GG. We present herein the first X-ray crystal structure of a TASP system and relate this structure to the solution data for both Q4 and its parent N1GG.
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Affiliation(s)
- Jon O Freeman
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, Canada V6T 1Z1
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27
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Bonnet C, Fries P, Crouzy S, Sénèque O, Cisnetti F, Boturyn D, Dumy P, Delangle P. A Gadolinium-Binding Cyclodecapeptide with a Large High-Field Relaxivity Involving Second-Sphere Water. Chemistry 2009; 15:7083-93. [DOI: 10.1002/chem.200900636] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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28
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Chopra N, Gan W, Schreiber H, Kurutz JW, Meredith SC. Versatile cyclic templates for assembly of axially oriented ligands. Bioconjug Chem 2009; 20:231-40. [PMID: 19159293 DOI: 10.1021/bc800312x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this paper, we describe two novel types of planar cyclic peptide templates for the facile addition of ligands that extend axially from the plane of the template ring. The first uses beta-amino acids of alternating D- and L-chirality, since the insertion of the additional methylene group in the peptide backbone was predicted and subsequently shown by NMR and molecular modeling, to reorient ligands attached to amino acid side chain axially with respect to the template ring. A second contains alternating D- and L-amino acids with an achiral Gly residue interposed between each chiral amino acid. The inserted Gly residues also tend to reorient side chains axially rather than radially, as was demonstrated by NMR and molecular modeling. The axial orientation of attached ligands is intended to foster or allow interactions among attached ligands in situations in which this is desired. Two such situations that we consider are (1) development of immunological reagents with avidity effects and (2) modeling of oligomers in fibril-forming peptides. Toward the first of these goals, we demonstrated that these templates are suitable for attaching macromolecules, by incorporating two types of protein, neutravidin and trypsinogen. Toward the second goal, we demonstrate the attachment of two different fibril-forming peptides to the template. The templates described herein thus have many of the desirable traits of such molecules, i.e., (1) multivalency for the attachment of multiple ligands, (2) suitable chemical functions for facile attachment of ligands, (3) versatility as to the number and spacing of ligand attachment sites, (4) sufficient rigidity so that the attached ligands can be similarly oriented with respect to the template, and (5) sufficient flexibility to allow even large ligands, such as proteins, to attach and interact.
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Affiliation(s)
- Neeraj Chopra
- Department of Pathology, The University of Chicago, Chicago, Illinois 60637, USA
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29
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Avrutina O, Empting M, Fabritz S, Daneschdar M, Frauendorf H, Diederichsen U, Kolmar H. Application of copper(i) catalyzed azide–alkyne [3+2] cycloaddition to the synthesis of template-assembled multivalent peptide conjugates. Org Biomol Chem 2009; 7:4177-85. [DOI: 10.1039/b908261a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Dolphin GT, Chierici S, Ouberai M, Dumy P, Garcia J. A multimeric quinacrine conjugate as a potential inhibitor of Alzheimer's beta-amyloid fibril formation. Chembiochem 2008; 9:952-63. [PMID: 18330854 DOI: 10.1002/cbic.200700602] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Amyloid formation and accumulation of the amyloid beta-peptide (Abeta) in the brain is associated with Alzheimer's disease (AD) pathogenesis. Therefore, among the therapeutic approaches in development to fight the disease, the direct inhibition of the Abeta self-assembly process is currently widely investigated and is one of the most promising approaches. In this study we investigated the potential of a multimeric display of quinacrine derivatives, as compared to the monomer quinacrine, as a design principal for a novel class of inhibitors against Abeta fibril formation. The presented multimeric conjugate exhibits a cluster of four quinacrine derivatives on a rigid cyclopeptidic scaffold. Herein is reported the synthesis of the conjugate, together with the in vitro inhibitory evaluation of Abeta(1-40) fibrils using the thioflavin T fluorescence assay, and imaging with atomic force microscopy. Our data show that the multimeric compound inhibits Abeta(1-40) fibril formation with an IC(50) value of 20+/-10 microM, which contrasts with the nonactive monomeric analogue. This work suggests that assembling multiple copies of acridine moieties to a central scaffold, for multiple interactions, is a promising strategy for the engineering of inhibitors against Abeta fibril formation.
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Affiliation(s)
- Gunnar T Dolphin
- Département de Chimie Moléculaire, UMR 5250, ICMG FR-2607, CNRS, Université Joseph Fourier, B.P. 53, 38041 Grenoble Cedex 9, France
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32
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Bjelaković MS, Krstić NM, Juranić N, Dabović MM, Gojković SV, Kessler M, Kalvoda J, Pavlović VD. Steroid template associated peptides: design, synthesis and 2D NMR characterization of a novel protected 18-Phe,19-Gly-containing steroidal compound. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.07.056] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Wang J, Li H, Zou G, Wang LX. Novel template-assembled oligosaccharide clusters as epitope mimics for HIV-neutralizing antibody 2G12. Design, synthesis, and antibody binding study. Org Biomol Chem 2007; 5:1529-40. [PMID: 17571181 DOI: 10.1039/b702961f] [Citation(s) in RCA: 109] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of a new class of template-assembled oligomannose clusters as the mimics of the epitope of the HIV-neutralizing antibody 2G12 is described. The novel oligomannose clusters were successfully assembled on a cyclic decapeptide template using the Cu(I)-catalyzed 1,3-dipolar cycloaddition of azides to alkynes by introducing four units of a synthetic D1 arm tetrasaccharide (Manalpha1,2Manalpha1,2Manalpha1,3Manalpha-) of high-mannose N-glycan on one face of the template and two T-helper epitope peptides on the other face of the template. Their binding to human antibody 2G12 was studied using surface plasmon resonance (SPR) technology. It was found that while the synthetic monomeric D1 arm oligosaccharide and its fluorinated derivative interacted with 2G12 only weakly, the corresponding template-assembled oligosaccharide clusters showed high affinity to antibody 2G12, indicating a clear clustering effect in 2G12 recognition. Interestingly, the fluorinated D1 arm cluster, in which the 6-OH of the terminal mannosyl residue was replaced with a fluorine atom, showed a distinct kinetic model in 2G12 binding as compared with the cluster of the natural D1 arm oligosaccharides. The oligosaccharide clusters with varied length of spacer demonstrated different affinity to 2G12, suggesting that an appropriate spatial orientation of the sugar chains in the cluster was crucial for high affinity binding to the antibody 2G12. It was also found that the introduction of two T-helper epitopes onto the template did not affect the structural integrity of the oligomannose cluster. The novel synthetic glycoconjugates represent a new type of immunogen that may be able to raise carbohydrate-specific neutralizing antibodies against HIV-1.
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Affiliation(s)
- Jingsong Wang
- Institute of Human Virology, University of Maryland, 725 W. Lombard Street, Baltimore, MD 21201, USA
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Devillers CH, Boturyn D, Bucher C, Dumy P, Labbé P, Moutet JC, Royal G, Saint-Aman E. Redox-active biomolecular architectures and self-assembled monolayers based on a cyclodecapeptide regioselectively addressable functional template. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:8134-43. [PMID: 16952253 DOI: 10.1021/la060491m] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
A nanometer scale redox active biomolecular architecture has been successfully synthesized through an efficient chemoselective oxime based coupling between ferrocenyl groups and a regioselectively addressable cyclodecapeptide. This molecular tool exhibits electronic, structural, and chemical properties driven by the biomimetic recognition activity of the polypeptide skeleton associated to the well-defined electrochemical activity of metallocenyl probes. Biomolecular materials obtained by confinement of the redox cyclopeptide in self-assembled monolayers on gold surfaces shows efficient through-bond electron transfer from the ferrocenes to the electrode surface via the peptidic backbone, as well as markedly improved sensing properties toward anionic species in organic electrolyte, as compared to those observed in homogeneous solution.
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Affiliation(s)
- Charles H Devillers
- Laboratoire d'Electrochimie Organique et de Photochimie Rédox, UMR CNRS 5630, Institut de Chimie Moléculaire de Grenoble, FR CNRS 2607, Université Joseph Fourier, BP 53, 38041 Grenoble Cédex 9, France
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36
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Tsukamoto K, Ohishi H, Maezaki N, Tanaka T, Ishida T. Calix[6]arene-Based Template for X-ray Crystallographic Analysis of Template-Assembled Synthetic Proteins. Chembiochem 2006; 7:1559-62. [PMID: 16960819 DOI: 10.1002/cbic.200600132] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Koji Tsukamoto
- Graduate School of Pharmaceutical Sciences, Osaka University 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
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37
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Singh Y, Dolphin GT, Razkin J, Dumy P. Synthetic Peptide Templates for Molecular Recognition: Recent Advances and Applications. Chembiochem 2006; 7:1298-314. [PMID: 16892470 DOI: 10.1002/cbic.200600078] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The creation of molecular systems that can mimic some of the properties of natural macromolecules is one of the major endeavors in contemporary protein chemistry. However, the construction of artificial proteins with predetermined structure and function is difficult on account of complex folding pathways. The use of topological peptide templates has been suggested to induce and stabilize defined secondary and tertiary structures. This is because the recent advances in the chemistry of coupling reagents, protecting groups, and solid-phase synthesis have made the chemical synthesis of peptides with conformationally controlled and complex structures feasible. Besides their use as structure-inducing devices, these peptide templates can also be utilized to construct novel structures with tailor-made functions. Herein, we present recent advances in the field of peptide-template-based approaches with particular emphasis on the demonstrated utility of this approach in molecular recognition, along with related applications.
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Affiliation(s)
- Yashveer Singh
- LEDSS, UMR CNRS 5616, ICMG FR 2607, Universite Joseph Fourier, Grenoble Cedex 9, France
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38
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Jin ZH, Josserand V, Razkin J, Garanger E, Boturyn D, Favrot MC, Dumy P, Coll JL. Noninvasive Optical Imaging of Ovarian Metastases Using Cy5-labeled RAFT-c(-RGDfK-)4. Mol Imaging 2006. [DOI: 10.2310/7290.2006.00022] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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39
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Hossain MA, Thomas F, Hamman S, Saint-Aman E, Boturyn D, Dumy P, Pierre JL. Cyclodecapeptides to mimic the radical site of tyrosyl-containing proteins. J Pept Sci 2006; 12:612-9. [PMID: 16770835 DOI: 10.1002/psc.769] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Tyrosyl radicals are involved in many biologically important processes. The development of model compounds to mimic radical enzyme active sites, such as galactose oxidase (GO), has widely contributed to an enhanced understanding of their spectral properties, structural attributes and even reactivity. An emerging approach towards the synthesis of such active site mimetics is the use of peptidic ligands. The potential of cyclodecapeptides to bear phenoxyl radicals has been evaluated through three compounds. LH(4) (2+) is a cyclodecapetide containing two histidine residues (mimicking His(496) and His(581) of GO) and two tyrosine residues (mimicking Tyr(495) and the Tyr(272)* radical of GO). L(tBu)H(4) (2+) and L(OMe)H(4) (2+) incorporate 2,4,6-protected phenols in place of each tyrosine in LH(4) (2+). The deprotonation constants of each peptide determined by potentiometric titrations showed that there are some interactions between the acido-basic residues. Cyclic voltammetric studies revealed that only the peptides incorporating 2,4,6-protected phenolates exhibit reversible redox couples and are thus precursors of radicals stable enough to persist in solution. These studies also showed L(OMe2-) to possess the lower oxidation potential, indicating that this peptide, in its radical form, is the most stabilized. The electrochemically generated radical species have been characterized by EPR spectroscopy.
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Affiliation(s)
- Mohammed Akhter Hossain
- Laboratoire de Chimie Biomimétique, LEDSS, UMR CNRS 5616, ICMG FR CNRS 2607, Université J. Fourier, BP 53, 38041, Grenoble Cedex 9, France
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Renaudet O, Dumy P. Synthesis of multitopic neoglycopeptides displaying recognition and detection motifs. Bioorg Med Chem Lett 2005; 15:3619-22. [PMID: 15982871 DOI: 10.1016/j.bmcl.2005.05.072] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2005] [Revised: 05/03/2005] [Accepted: 05/11/2005] [Indexed: 11/26/2022]
Abstract
We describe herein the synthesis of cyclic decapeptide template displaying clustered carbohydrate recognition motifs and detection agent on spatially separated domains. Such multitopic labeled neoglycopeptides represent attractive tools for binding assays with carbohydrate binding proteins in glycomic research.
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Affiliation(s)
- Olivier Renaudet
- LEDSS, UMR-CNRS 5616 & ICMG FR 2607, Université Joseph Fourier, BP 53 38041 Grenoble Cedéx 9, France
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Affiliation(s)
- Gabriele Tuchscherer
- Ecole Polytechnique Fédérale de Lausanne, Institute of Molecular Sciences and Engineering, CH-1015 Lausanne, Switzerland
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Abstract
Constricting the peptide backbone into a more defined conformational form through cyclization is an activity evolved in nature and in synthetic work, the latter straddling only the most recent decades. The resulting conformational constraints increase the probability of an optimum response with bio-receptors. The purpose of this review is to highlight developments that have proved to be reasonably efficient in the macrocyclization of linear precursors into cyclic peptides and depsipeptides.
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Affiliation(s)
- John S Davies
- Department of Chemistry, University of Wales, Swansea, Singleton Park, Swansea SA2 8PP, UK.
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