51
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Barbosa M, Vale N, Costa FM, Martins MCL, Gomes P. Tethering antimicrobial peptides onto chitosan: Optimization of azide-alkyne “click” reaction conditions. Carbohydr Polym 2017; 165:384-393. [DOI: 10.1016/j.carbpol.2017.02.050] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 02/11/2017] [Accepted: 02/14/2017] [Indexed: 12/17/2022]
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52
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Zhu Z, Chen H, Li S, Yang X, Bittner E, Cai C. Tripodal Amine Ligands for Accelerating Cu-Catalyzed Azide-Alkyne Cycloaddition: Efficiency and Stability against Oxidation and Dissociation. Catal Sci Technol 2017; 7:2474-2485. [PMID: 29129990 PMCID: PMC5679428 DOI: 10.1039/c7cy00587c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ancillary ligands, especially the tripodal ligands such as tris(triazolylmethyl)amines, have been widely used to accelerate the Cu-catalyzed azide-alkyne cycloaddition (CuAAC, a "click" reaction). However, the relationship between the activity of these Cu(I) complexes and their stability against air oxidation and ligand dissociation/exchange was seldom studied, which is critical for the applications of CuAAC in many biological systems. In this work, we synthesized twenty-one Cu(I) tripodal ligands varying in chelate arm length (five to seven atoms), donor groups (triazolyl, pyridyl and phenyl), and steric hindrance. The effects of these variables on the CuAAC reaction, air oxidation, and ligand dissociation were evaluated. Reducing the chelate arm length to five atoms, decreasing steric hindrance, or using a relatively weakly-binding ligand can significantly increase the CuAAC reactivity of the Cu(I) complexes, but the concomitant higher degree of oxidation cannot be avoided, which leads to rapid degradation of a histidine-containing peptide as a model of proteins. The oxidation of the peptide can be reduced by attaching oligo(ethylene glycol) chains to the ligands as sacrificing reagents. Using electrospray ionization mass spectrometry (ESI-MS), we directly observed the tri- and di-copper(I)-acetylide complexes in CuAAC reaction in the [5,5,5] ligand system and a small amount of di-Cu(I)-acetylide in the [5,5,6] ligand system. Only the mono-Cu(I) ligand adducts were observed in the [6,6,6] and [5,6,6] ligand systems.
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Affiliation(s)
- Zhiling Zhu
- Department of Chemistry, University of Houston, 4800 Calhoun Rd., Houston, TX 77204, USA
| | - Haoqing Chen
- Department of Chemistry, University of Houston, 4800 Calhoun Rd., Houston, TX 77204, USA
| | - Siheng Li
- Department of Chemistry, University of Houston, 4800 Calhoun Rd., Houston, TX 77204, USA
| | - Xunmo Yang
- Department of Chemistry, University of Houston, 4800 Calhoun Rd., Houston, TX 77204, USA
| | - Eric Bittner
- Department of Chemistry, University of Houston, 4800 Calhoun Rd., Houston, TX 77204, USA
| | - Chengzhi Cai
- Department of Chemistry, University of Houston, 4800 Calhoun Rd., Houston, TX 77204, USA
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53
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The Suzuki–Miyaura Cross-Coupling as a Versatile Tool for Peptide Diversification and Cyclization. Catalysts 2017. [DOI: 10.3390/catal7030074] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
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54
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Ghirardello M, Delso I, Tejero T, Merino P. Synthesis of Amino-Acid-Nucleoside Conjugates. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600497] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mattia Ghirardello
- Departamento de Síntesis y Estructura de Biomoléculas; Instituto de Síntesis Química y Catálisis Homogénea (ISQCH); Universidad de Zaragoza. CSIC; 50009 Zaragoza Aragón Spain
| | - Ignacio Delso
- Departamento de Síntesis y Estructura de Biomoléculas; Instituto de Síntesis Química y Catálisis Homogénea (ISQCH); Universidad de Zaragoza. CSIC; 50009 Zaragoza Aragón Spain
- Servicio De Resonancia Magnética Nuclear; Centro de Química y Materiales de Aragón (CEQMA); Universidad de Zaragoza, CSIC; 50009 Zaragoza Aragón Spain
| | - Tomas Tejero
- Departamento de Síntesis y Estructura de Biomoléculas; Instituto de Síntesis Química y Catálisis Homogénea (ISQCH); Universidad de Zaragoza. CSIC; 50009 Zaragoza Aragón Spain
| | - Pedro Merino
- Departamento de Síntesis y Estructura de Biomoléculas; Instituto de Síntesis Química y Catálisis Homogénea (ISQCH); Universidad de Zaragoza. CSIC; 50009 Zaragoza Aragón Spain
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55
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Meyer JP, Adumeau P, Lewis JS, Zeglis BM. Click Chemistry and Radiochemistry: The First 10 Years. Bioconjug Chem 2016; 27:2791-2807. [PMID: 27787983 DOI: 10.1021/acs.bioconjchem.6b00561] [Citation(s) in RCA: 159] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The advent of click chemistry has had a profound influence on almost all branches of chemical science. This is particularly true of radiochemistry and the synthesis of agents for positron emission tomography (PET), single photon emission computed tomography (SPECT), and targeted radiotherapy. The selectivity, ease, rapidity, and modularity of click ligations make them nearly ideally suited for the construction of radiotracers, a process that often involves working with biomolecules in aqueous conditions with inexorably decaying radioisotopes. In the following pages, our goal is to provide a broad overview of the first 10 years of research at the intersection of click chemistry and radiochemistry. The discussion will focus on four areas that we believe underscore the critical advantages provided by click chemistry: (i) the use of prosthetic groups for radiolabeling reactions, (ii) the creation of coordination scaffolds for radiometals, (iii) the site-specific radiolabeling of proteins and peptides, and (iv) the development of strategies for in vivo pretargeting. Particular emphasis will be placed on the four most prevalent click reactions-the Cu-catalyzed azide-alkyne cycloaddition (CuAAC), the strain-promoted azide-alkyne cycloaddition (SPAAC), the inverse electron demand Diels-Alder reaction (IEDDA), and the Staudinger ligation-although less well-known click ligations will be discussed as well. Ultimately, it is our hope that this review will not only serve to educate readers but will also act as a springboard, inspiring synthetic chemists and radiochemists alike to harness click chemistry in even more innovative and ambitious ways as we embark upon the second decade of this fruitful collaboration.
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Affiliation(s)
| | - Pierre Adumeau
- Department of Chemistry, Hunter College of the City University of New York , 413 East 69th Street, New York, New York 10028, United States
| | - Jason S Lewis
- Department of Radiology, Weill Cornell Medical College , 520 East 70th Street, New York, New York 10065, United States
| | - Brian M Zeglis
- Department of Chemistry, Hunter College of the City University of New York , 413 East 69th Street, New York, New York 10028, United States.,Department of Radiology, Weill Cornell Medical College , 520 East 70th Street, New York, New York 10065, United States.,Ph.D. Program in Chemistry, The Graduate Center of the City University of New York , 365 5th Avenue, New York, New York 10016, United States
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56
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Wells SM, Widen JC, Harki DA, Brummond KM. Alkyne Ligation Handles: Propargylation of Hydroxyl, Sulfhydryl, Amino, and Carboxyl Groups via the Nicholas Reaction. Org Lett 2016; 18:4566-9. [PMID: 27570975 DOI: 10.1021/acs.orglett.6b02088] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The Nicholas reaction has been applied to the installation of alkyne ligation handles. Acid-promoted propargylation of hydroxyl, sulfhydryl, amino, and carboxyl groups using dicobalt hexacarbonyl-stabilized propargylium ions is reported. This method is useful for introduction of propargyl groups into base-sensitive molecules, thereby expanding the toolbox of methods for the incorporation of alkynes for bio-orthogonal reactions. High-value molecules are used as the limiting reagent, and various propargylium ion precursors are compared.
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Affiliation(s)
- Sarah M Wells
- Department of Chemistry, University of Pittsburgh , Pittsburgh, Pennsylvania 15206, United States
| | - John C Widen
- Department of Medicinal Chemistry, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Daniel A Harki
- Department of Medicinal Chemistry, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Kay M Brummond
- Department of Chemistry, University of Pittsburgh , Pittsburgh, Pennsylvania 15206, United States
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57
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Wang P, Silverman SK. DNA-Catalyzed Introduction of Azide at Tyrosine for Peptide Modification. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201604364] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Puzhou Wang
- Department of Chemistry; University of Illinois at Urbana-Champaign; 600 South Mathews Avenue Urbana IL 61801 USA
| | - Scott K. Silverman
- Department of Chemistry; University of Illinois at Urbana-Champaign; 600 South Mathews Avenue Urbana IL 61801 USA
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58
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Wang P, Silverman SK. DNA-Catalyzed Introduction of Azide at Tyrosine for Peptide Modification. Angew Chem Int Ed Engl 2016; 55:10052-6. [PMID: 27391404 PMCID: PMC4993102 DOI: 10.1002/anie.201604364] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Indexed: 12/12/2022]
Abstract
We show that DNA enzymes (deoxyribozymes) can introduce azide functional groups at tyrosine residues in peptide substrates. Using in vitro selection, we identified deoxyribozymes that transfer the 2′‐azido‐2′‐deoxyadenosine 5′‐monophosphoryl group (2′‐Az‐dAMP) from the analogous 5′‐triphosphate (2′‐Az‐dATP) onto the tyrosine hydroxyl group of a peptide, which is either tethered to a DNA anchor or free. Some of the new deoxyribozymes are general with regard to the amino acid residues surrounding the tyrosine, while other DNA enzymes are sequence‐selective. We use one of the new deoxyribozymes to modify free peptide substrates by attaching PEG moieties and fluorescent labels.
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Affiliation(s)
- Puzhou Wang
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, IL, 61801, USA
| | - Scott K Silverman
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, IL, 61801, USA.
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59
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Kitamura Y, Sakamoto R, Shiraishi T, Oguri H, Ohno S, Kitade Y. Practical modification of peptides using ligand-free copper-catalyzed azide–alkyne cycloaddition. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.05.029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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60
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Conibear AC, Farbiarz K, Mayer RL, Matveenko M, Kählig H, Becker CFW. Arginine side-chain modification that occurs during copper-catalysed azide-alkyne click reactions resembles an advanced glycation end product. Org Biomol Chem 2016; 14:6205-11. [PMID: 27282129 DOI: 10.1039/c6ob00932h] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dehydroascorbate is a by-product of copper-catalysed azide-alkyne click (CuAAC) reactions and also forms advanced glycation end products (AGEs) in tissues undergoing oxidative stress. Here we isolate and characterize an arginine-dehydroascorbate adduct formed during CuAAC reactions, investigate strategies for preventing its formation, and propose its biological relevance as an AGE.
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Affiliation(s)
- Anne C Conibear
- University of Vienna, Faculty of Chemistry, Institute of Biological Chemistry, Währinger Straße 38, 1090 Vienna, Austria.
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61
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Wan Y, Moyle PM, Christie MP, Toth I. Nanosized, peptide-based multicomponent DNA delivery systems: optimization of endosome escape activity. Nanomedicine (Lond) 2016; 11:907-19. [DOI: 10.2217/nnm.16.27] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Aim: Endosome escape is essential for developing effective nonviral gene delivery systems. Herein, three endosome-disrupting peptides (HA2(1–20), GALA and KALA) were incorporated into a multicomponent oligonucleotide delivery system to identify which peptide imparted the most favorable endosome escape and toxicity profile. Materials & methods: Copper (I)-catalyzed azide-alkyne cycloaddition was used to construct multicomponent delivery vectors. The systems were evaluated for size, toxicity, cellular uptake and endosome escape activity. Results: Each system condensed plasmid DNA to form nanosized particles. The highest cellular uptake and endosome escape were associated with GALA and KALA containing systems, with KALA incorporation correlating with greater toxicity. Conclusion: GALA was selected as the most promising endosome-disrupting peptide for incorporation into the nanosized oligonucleotide delivery system.
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Affiliation(s)
- Yu Wan
- School of Chemistry & Molecular Biosciences, The University of Queensland, St Lucia, 4072, QLD, Australia
- School of Pharmacy, The University of Queensland, Woolloongabba, 4102, QLD, Australia
| | - Peter M Moyle
- School of Pharmacy, The University of Queensland, Woolloongabba, 4102, QLD, Australia
| | - Michelle P Christie
- School of Chemistry & Molecular Biosciences, The University of Queensland, St Lucia, 4072, QLD, Australia
| | - Istvan Toth
- School of Chemistry & Molecular Biosciences, The University of Queensland, St Lucia, 4072, QLD, Australia
- School of Pharmacy, The University of Queensland, Woolloongabba, 4102, QLD, Australia
- Institute for Molecular Bioscience, The University of Queensland, St Lucia, 4072, QLD, Australia
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62
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Sedaghat B, Stephenson RJ, Giddam AK, Eskandari S, Apte SH, Pattinson DJ, Doolan DL, Toth I. Synthesis of Mannosylated Lipopeptides with Receptor Targeting Properties. Bioconjug Chem 2016; 27:533-48. [PMID: 26735314 DOI: 10.1021/acs.bioconjchem.5b00547] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Present on the surface of antigen presenting cells (APCs), the mannose receptor (MR) has long been recognized as a front-line receptor in pathogen recognition. During the past decade many attempts have been made to target this receptor for applications including vaccine and drug development. In the present study, a library of vaccine constructs comprising fluorescently labeled mannosylated lipid-dendrimers that contained the ovalbumin CD4(+) epitope, OVA(323-339), as the model peptide antigen were synthesized using fluorenylmethyloxycarbonyl (Fmoc) solid phase peptide synthesis (SPPS). The vaccine constructs were designed with an alanine spacer between the O-linked mannose moieties to investigate the impact of distance between the mannose units on receptor-mediated uptake and/or binding in APCs. Uptake studies performed on F4/80(+) and CD11c(+) cells showed significant uptake and/or binding for lipopeptides containing mannose, and also the lipopeptide without mannose when compared to the control peptides (peptide with no lipid and peptide with no mannose and no lipid). Furthermore, mannan inhibition assays demonstrated that uptake of the mannosylated and lipidated peptides was receptor mediated. To address the specificity of receptor uptake, surface plasmon resonance studies were performed using biacore technology and confirmed high affinity of the mannosylated and lipidated vaccine constructs toward the MR. These studies confirm that both mannose and lipid moieties play significant roles in receptor-mediated uptake on APCs, potentially facilitating vaccine development.
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Affiliation(s)
| | | | | | | | - Simon H Apte
- Infectious Diseases Program, QIMR Berghofer Medical Research Institute , Brisbane, Queensland 4029, Australia
| | - David J Pattinson
- Infectious Diseases Program, QIMR Berghofer Medical Research Institute , Brisbane, Queensland 4029, Australia
| | - Denise L Doolan
- Infectious Diseases Program, QIMR Berghofer Medical Research Institute , Brisbane, Queensland 4029, Australia
| | - Istvan Toth
- School of Pharmacy, The University of Queensland , Woolloongabba, Queensland 4012, Australia
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63
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Demakova MY, Bolotin DS, Bokach NA, Islamova RM, Starova GL, Kukushkin VY. Click-Type PtII-Mediated Hydroxyguanidine-Nitrile Coupling Provides Useful Catalysts for Hydrosilylation Cross-Linking. Chempluschem 2015; 80:1607-1614. [DOI: 10.1002/cplu.201500327] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Indexed: 11/08/2022]
Affiliation(s)
- Marina Ya. Demakova
- Institute of Chemistry; Saint Petersburg State University; Universitetskaya nab. 26 199034 Saint Petersburg Russian Federation
| | - Dmitrii S. Bolotin
- Institute of Chemistry; Saint Petersburg State University; Universitetskaya nab. 26 199034 Saint Petersburg Russian Federation
| | - Nadezhda A. Bokach
- Institute of Chemistry; Saint Petersburg State University; Universitetskaya nab. 26 199034 Saint Petersburg Russian Federation
| | - Regina M. Islamova
- Institute of Chemistry; Saint Petersburg State University; Universitetskaya nab. 26 199034 Saint Petersburg Russian Federation
| | - Galina L. Starova
- Institute of Chemistry; Saint Petersburg State University; Universitetskaya nab. 26 199034 Saint Petersburg Russian Federation
| | - Vadim Yu. Kukushkin
- Institute of Chemistry; Saint Petersburg State University; Universitetskaya nab. 26 199034 Saint Petersburg Russian Federation
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64
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Fuaad AAHA, Pearson MS, Pickering DA, Becker L, Zhao G, Loukas AC, Skwarczynski M, Toth I. Lipopeptide Nanoparticles: Development of Vaccines against Hookworm Parasite. ChemMedChem 2015; 10:1647-54. [DOI: 10.1002/cmdc.201500227] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2015] [Indexed: 01/31/2023]
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65
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Shakiba A, Jamison AC, Lee TR. Poly(L-lysine) Interfaces via Dual Click Reactions on Surface-Bound Custom-Designed Dithiol Adsorbates. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:6154-63. [PMID: 25961498 DOI: 10.1021/acs.langmuir.5b00877] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Surfaces modified with poly(L-lysine) can be used to immobilize selected biomolecules electrostatically. This report describes the preparation of a set of self-assembled monolayers (SAMs) from three different azide-terminated adsorbates as platforms for performing controlled surface attachments and as a means of determining the parameters that afford stable poly(L-lysine)-modified SAM surfaces having controlled packing densities. A maleimide-terminated alkyne linker was "clicked" to the azide-terminated surfaces via a copper-catalyzed cycloaddition reaction to produce the attachment sites for the polypeptides. A thiol-Michael addition was then used to immobilize cysteine-terminated poly(L-lysine) moieties on the gold surface, avoiding adsorbate self-reactions with this two-step procedure. Each step in this process was analyzed by ellipsometry, X-ray photoelectron spectroscopy, polarization modulation infrared reflection-absorption spectroscopy, and contact angle goniometry to determine which adsorbate structure most effectively produced the targeted polypeptide interface. Additionally, a series of mixed SAMs using an azidoalkanethiol in combination with a normal alkanethiol having an equivalent alkyl chain were prepared to provide data to determine how dilution of the azide reactive site on the SAM surface influences the initial click reaction. Overall, the collected data demonstrate the advantages of an appropriately designed bidentate absorbate and its potential to form effective platforms for biomolecule surface attachment via click reactions.
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Affiliation(s)
- Amin Shakiba
- Departments of Chemistry and Chemical Engineering and the Texas Center for Superconductivity, University of Houston, Houston, Texas 77204-5003, United States
| | - Andrew C Jamison
- Departments of Chemistry and Chemical Engineering and the Texas Center for Superconductivity, University of Houston, Houston, Texas 77204-5003, United States
| | - T Randall Lee
- Departments of Chemistry and Chemical Engineering and the Texas Center for Superconductivity, University of Houston, Houston, Texas 77204-5003, United States
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66
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Dehigaspitiya DC, Navath S, Weber CS, Lynch RM, Mash EA. Synthesis and bioactivity of MSH4 oligomers prepared by an A 2 + B 2 strategy. Tetrahedron Lett 2015; 56:3060-3065. [PMID: 26120211 PMCID: PMC4480789 DOI: 10.1016/j.tetlet.2014.12.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Oligomers incorporating the tetrapeptide MSH4, the minimum active sequence of melanocyte stimulating hormone, were synthesized by an A2 + B2 strategy involving microwave-assisted copper-catalyzed azide-alkyne cycloaddition. A2 contained an MSH4 core while B2 contained a (Pro-Gly)3 spacer. Soluble mixtures containing compounds with up to eight MSH4 units were obtained from oligomerizations at high monomer concentrations. The avidities of several oligomeric mixtures were evaluated by means of a competitive binding assay using HEK293 cells engineered to overexpress the melanocortin 4 receptor. When based on total MSH4 concentrations, avidities were only minimally enhanced compared with a monovalent control. The lack of variation in the effect of ligands on probe binding is consistent with high off rates for MSH4 in both monovalent and oligomeric constructs relative to that of the competing probe.
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Affiliation(s)
| | - Suryakiran Navath
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, AZ 85721-0041, USA
| | - Craig S. Weber
- Department of Physiology, University of Arizona, Tucson, AZ 85724-5051, USA
| | - Ronald M. Lynch
- Department of Physiology, University of Arizona, Tucson, AZ 85724-5051, USA
- The Bio5 Institute, University of Arizona, Tucson, AZ 85721-0240, USA
| | - Eugene A. Mash
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, AZ 85721-0041, USA
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67
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Wirtz M, Grüter A, Rebmann P, Dier T, Volmer DA, Huch V, Jung G. Two-color emissive probes for click reactions. Chem Commun (Camb) 2015; 50:12694-7. [PMID: 25200167 DOI: 10.1039/c4cc05288a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Cu(I)-catalyzed azide-alkyne cyclization (CuAAC) is the paradigmatic click reaction of continuous interest. Especially fluorogenic and FRET probes have become indispensable tools for life sciences. Here, we present a fluorescent alkyne for monitoring CuAAC, which undergoes a bathochromic shift upon reaction. Application in single-molecule and catalysis research is foreseen.
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Affiliation(s)
- Marcel Wirtz
- Biophysical Chemistry, Saarland University, Campus Building B2.2, 66123 Saarbrücken, Germany.
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68
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69
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Ferreira SZ, Carneiro HC, Lara HA, Alves RB, Resende JM, Oliveira HM, Silva LM, Santos DA, Freitas RP. Synthesis of a New Peptide-Coumarin Conjugate: A Potential Agent against Cryptococcosis. ACS Med Chem Lett 2015; 6:271-5. [PMID: 25815145 DOI: 10.1021/ml500393q] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 01/07/2015] [Indexed: 12/11/2022] Open
Abstract
Antimicrobial peptides (AMPs) are currently being investigated as potential sources of novel therapeutics against an increasing number of microorganisms resistant to conventional antibiotics. The conjugation of an AMP to other bioactive compounds is an interesting approach for the development of new derivatives with increased antimicrobial efficiency and broader spectra of action. In this work, the synthesis of a new peptide-coumarin conjugate via copper(I)-catalyzed azide-alkyne cycloaddition is described. The conjugate was assayed for in vitro cytotoxicity and displayed antifungal activity against Cryptococcus gattii and Cryptococcus neoformans. Additionally, the conjugate exhibited increased antifungal efficacy when compared with the individual peptide, coumarin, or triazole moieties. Treatment of C. gattii with the peptide-coumarin conjugate enhanced the production of reactive oxygen species, suggesting that the oxidative burst plays an important role in the mechanism of action of the conjugate.
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Affiliation(s)
| | | | | | | | | | - Heloísa M. Oliveira
- Serviço
de Biologia Celular, Diretoria de Pesquisa e Desenvolvimento da Fundação Ezequiel Dias, Belo Horizonte, Brazil
| | - Luciana M. Silva
- Serviço
de Biologia Celular, Diretoria de Pesquisa e Desenvolvimento da Fundação Ezequiel Dias, Belo Horizonte, Brazil
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70
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MacConaghy KI, Chadly DM, Stoykovich MP, Kaar JL. Optically diffracting hydrogels for screening kinase activity in vitro and in cell lysate: impact of material and solution properties. Anal Chem 2015; 87:3467-75. [PMID: 25714913 DOI: 10.1021/acs.analchem.5b00442] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Optically diffracting films based on hydrogel-encapsulated crystalline colloidal arrays have considerable utility as sensors for detecting enzymaticphosphorylation and, thus, in screening small molecule modulators of kinases. In this work, we have investigated the impact of hydrogel properties, as well as the role of the ionic character of the surrounding environment, on the optical sensitivity of kinase responsive crystalline colloidal array-containing hydrogels. In agreement with a model of hydrogel swelling, the optical sensitivity of such materials increased as the shear modulus and the Flory-Huggins interaction parameter between polymer and solvent decreased. Additionally, elimination of extraneous charges in the polymer backbone by exploiting azide-alkyne click chemistry to functionalize the hydrogels with a peptide substrate for protein kinase A further enhanced the sensitivity of the optically diffracting films. Increasing peptide concentration and, in turn, immobilized charge within the hydrogel network was shown to increase the optical response over a range of ionic strength conditions. Ultimately, we showed that, by tuning the hydrogel and solution properties, as little as 0.1 U/μL protein kinase A could be detected in short reaction times (i.e., 2 h), which is comparable to conventional biochemical kinase assays. We further showed that this approach can be used to detect protein kinase A activity in lysate from HEK293 cells. The sensitivity of the resulting films, coupled with the advantages of photonic crystal based sensors (e.g., label free detection), makes this approach highly attractive for screening enzymatic phosphorylation.
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Affiliation(s)
- Kelsey I MacConaghy
- Department of Chemical and Biological Engineering, University of Colorado, Campus Box 596, Boulder, Colorado 80309, United States
| | - Duncan M Chadly
- Department of Chemical and Biological Engineering, University of Colorado, Campus Box 596, Boulder, Colorado 80309, United States
| | - Mark P Stoykovich
- Department of Chemical and Biological Engineering, University of Colorado, Campus Box 596, Boulder, Colorado 80309, United States
| | - Joel L Kaar
- Department of Chemical and Biological Engineering, University of Colorado, Campus Box 596, Boulder, Colorado 80309, United States
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71
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Vilà S, Badosa E, Montesinos E, Feliu L, Planas M. Solid-Phase Synthesis of Peptide Conjugates Derived from the Antimicrobial Cyclic Decapeptide BPC194. European J Org Chem 2015. [DOI: 10.1002/ejoc.201403344] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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72
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Bent SJ, Mahon MF, Webster RL. Copper malonamide complexes and their use in azide–alkyne cycloaddition reactions. Dalton Trans 2015; 44:10253-8. [DOI: 10.1039/c5dt01312g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of copper(i) malonamide complexes have been synthesised and their catalytic activity explored in 1,3-dipolar cycloaddition reactions: the first time this ligand motif has been reported in a catalytic transformation.
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Affiliation(s)
- S. J. Bent
- Department of Chemistry
- University of Bath
- Bath
- UK
| | - M. F. Mahon
- Department of Chemistry
- University of Bath
- Bath
- UK
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73
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Liu TY, Hussein WM, Giddam AK, Jia Z, Reiman JM, Zaman M, McMillan NAJ, Good MF, Monteiro MJ, Toth I, Skwarczynski M. Polyacrylate-based delivery system for self-adjuvanting anticancer peptide vaccine. J Med Chem 2014; 58:888-96. [PMID: 25489968 DOI: 10.1021/jm501514h] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Vaccination can provide a safe alternative to chemotherapy by using the body's natural defense mechanisms to create a potent immune response against tumor cells. Peptide-based therapeutic vaccines against human papillomavirus (HPV)-related cancers are usually designed to elicit cytotoxic T cell responses by targeting the HPV-16 E7 oncoprotein. However, peptides alone lack immunogenicity, and an additional adjuvant or external delivery system is required. In this study, we developed new polymer-peptide conjugates to create an efficient self-adjuvanting system for peptide-based therapeutic vaccines. These conjugates reduced tumor growth and eradicated E7-positive TC-1 tumors in mice after a "single shot" immunization, without the help from an external adjuvant. The new conjugates had a significantly higher anticancer efficacy than the antigen formulated with a commercial adjuvant. Furthermore, the polymer-peptide conjugates were promptly taken up by antigen presenting cells, including dendritic cells and macrophages, and efficiently activated CD4(+) T-helper cells and CD8(+) cytotoxic T lymphocyte cells.
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Affiliation(s)
- Tzu-Yu Liu
- School of Chemistry and Molecular Biosciences, ‡Australian Institute for Bioengineering and Nanotechnology, and §School of Pharmacy, The University of Queensland , Brisbane, QLD 4072, Australia
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74
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Turner DM, Tom CTMB, Renslo AR. Simple plate-based, parallel synthesis of disulfide fragments using the CuAAC click reaction. ACS COMBINATORIAL SCIENCE 2014; 16:661-4. [PMID: 25353066 DOI: 10.1021/co500132q] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Disulfide exchange screening is a site-directed approach to fragment-based lead discovery that requires a bespoke library of disulfide-containing fragments. Previously, we described a simple one-pot, two-step synthesis of disulfide fragments from amine- or acid-bearing starting materials. Here, we describe the synthesis of disulfide fragments that bear a 1,4-substituted-1,2,3-triazole linkage between disulfide and molecular diversity element. This work establishes the compatibility of copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC) chemistry with a one-pot, two-step reaction sequence that can be readily parallelized. We performed 96 reactions in a single deep-well microtiter plate, employing 48 alkynes and two different azide linker reagents. From this effort, a total of 81 triazole-containing disulfide fragments were obtained in useful isolated yields. Thus, CuAAC chemistry offers an experimentally convenient method to rapidly prepare disulfide fragments that are structurally distinct from fragments accessed via amide, sulfonamide, or isocyanate chemistries.
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Affiliation(s)
- David M. Turner
- Small Molecule
Discovery
Center, and Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, California 94158, United States
| | - Christopher T. M. B. Tom
- Small Molecule
Discovery
Center, and Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, California 94158, United States
| | - Adam R. Renslo
- Small Molecule
Discovery
Center, and Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, California 94158, United States
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75
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‘Click’ glycosylation of peptides through cysteine propargylation and CuAAC. Bioorg Med Chem 2014; 22:6672-6683. [DOI: 10.1016/j.bmc.2014.09.056] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 09/19/2014] [Accepted: 09/25/2014] [Indexed: 01/26/2023]
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76
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Eskandari S, Stephenson RJ, Fuaad AA, Apte SH, Doolan DL, Toth I. Synthesis and Characterisation of Self-Assembled and Self-Adjuvanting Asymmetric Multi-Epitope Lipopeptides of Ovalbumin. Chemistry 2014; 21:1251-61. [DOI: 10.1002/chem.201404997] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Indexed: 01/25/2023]
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77
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Brizet B, Goncalves V, Bernhard C, Harvey PD, Denat F, Goze C. DMAP-BODIPY Alkynes: A Convenient Tool for Labeling Biomolecules for Bimodal PET-Optical Imaging. Chemistry 2014; 20:12933-44. [DOI: 10.1002/chem.201402379] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Indexed: 11/11/2022]
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