1
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Xing Y, Wang Y, Ma D, Shen S, Song C, Zhang N, Bo T, Shi T, Huo S. N-Halosuccinimides mediated deprotection of cysteine-S protecting groups for one-pot regioselective synthesis of disulfide bonds in peptides under mild aqueous conditions. Tetrahedron Lett 2023. [DOI: 10.1016/j.tetlet.2023.154459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
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2
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Zoukimian C, Béroud R, Boturyn D. 2-Hydroxy-4-methoxybenzyl as a Thiol-Protecting Group for Directed-Disulfide Bond Formation. Org Lett 2022; 24:3407-3410. [DOI: 10.1021/acs.orglett.2c01190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Claude Zoukimian
- Univ. Grenoble Alpes, CNRS, Department of Molecular Chemistry, 570 rue de la chimie, CS 40700, Grenoble 38000, France
- Smartox Biotechnology, 6 rue des platanes, Saint-Egrève 38120, France
| | - Rémy Béroud
- Smartox Biotechnology, 6 rue des platanes, Saint-Egrève 38120, France
| | - Didier Boturyn
- Univ. Grenoble Alpes, CNRS, Department of Molecular Chemistry, 570 rue de la chimie, CS 40700, Grenoble 38000, France
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3
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Spears RJ, McMahon C, Shamsabadi M, Bahou C, Thanasi IA, Rochet LNC, Forte N, Thoreau F, Baker JR, Chudasama V. A novel thiol-labile cysteine protecting group for peptide synthesis based on a pyridazinedione (PD) scaffold. Chem Commun (Camb) 2022; 58:645-648. [PMID: 34747956 DOI: 10.1039/d1cc03802h] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Herein we report a thiol-labile cysteine protecting group based on an unsaturated pyridazinedione (PD) scaffold. We establish compatibility of the PD in conventional solid phase peptide synthesis (SPPS), showcasing this in the on-resin synthesis of biologically relevant oxytocin. Furthermore, we establish the applicability of the PD protecting group towards both microwave-assisted SPPS and native chemical ligation (NCL) in a model system.
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Affiliation(s)
- Richard J Spears
- UCL Department of Chemistry, 20 Gordon Street, London, WC1H 0AJ, UK.
| | - Clíona McMahon
- UCL Department of Chemistry, 20 Gordon Street, London, WC1H 0AJ, UK.
| | - Monika Shamsabadi
- UCL Department of Chemistry, 20 Gordon Street, London, WC1H 0AJ, UK.
| | - Calise Bahou
- UCL Department of Chemistry, 20 Gordon Street, London, WC1H 0AJ, UK.
| | - Ioanna A Thanasi
- UCL Department of Chemistry, 20 Gordon Street, London, WC1H 0AJ, UK.
| | - Léa N C Rochet
- UCL Department of Chemistry, 20 Gordon Street, London, WC1H 0AJ, UK.
| | - Nafsika Forte
- UCL Department of Chemistry, 20 Gordon Street, London, WC1H 0AJ, UK.
| | - Fabien Thoreau
- UCL Department of Chemistry, 20 Gordon Street, London, WC1H 0AJ, UK.
| | - James R Baker
- UCL Department of Chemistry, 20 Gordon Street, London, WC1H 0AJ, UK.
| | - Vijay Chudasama
- UCL Department of Chemistry, 20 Gordon Street, London, WC1H 0AJ, UK.
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4
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Spears RJ, McMahon C, Chudasama V. Cysteine protecting groups: applications in peptide and protein science. Chem Soc Rev 2021; 50:11098-11155. [PMID: 34605832 DOI: 10.1039/d1cs00271f] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Protecting group chemistry for the cysteine thiol group has enabled a vast array of peptide and protein chemistry over the last several decades. Increasingly sophisticated strategies for the protection, and subsequent deprotection, of cysteine have been developed, facilitating synthesis of complex disulfide-rich peptides, semisynthesis of proteins, and peptide/protein labelling in vitro and in vivo. In this review, we analyse and discuss the 60+ individual protecting groups reported for cysteine, highlighting their applications in peptide synthesis and protein science.
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Affiliation(s)
| | - Clíona McMahon
- Department of Chemistry, University College London, London, UK.
| | - Vijay Chudasama
- Department of Chemistry, University College London, London, UK.
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5
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Winkler DFH. Automated Solid-Phase Peptide Synthesis. METHODS IN MOLECULAR BIOLOGY (CLIFTON, N.J.) 2021; 2103:59-94. [PMID: 31879919 DOI: 10.1007/978-1-0716-0227-0_5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The development of solid-phase peptide synthesis by Bruce Merrifield paved the way for a synthesis carried out by machines. Automated peptide synthesis is a fast and convenient way of synthesizing many peptides simultaneously. This chapter tries to give a general guidance for the development of synthesis protocols for the peptide synthesizer. It also provides some suggestions for the modification of the synthesized peptides. Additionally, many examples of possible challenges during and after the synthesis are given in order to support the reader in finding the best synthesis strategy. Numerous references are given to many of the described matters.
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6
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Wang J, Dong L, Liu Y, Chen X, Ma Y, Yin H, Du S, Qi Y, Wang K. Efficient Synthesis and Oxidative Folding Studies of Centipede Toxin RhTx. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202102045] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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7
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He R, Pan J, Mayer JP, Liu F. Stepwise Construction of Disulfides in Peptides. Chembiochem 2020; 21:1101-1111. [PMID: 31886929 DOI: 10.1002/cbic.201900717] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Indexed: 12/12/2022]
Abstract
The disulfide bond plays an important role in biological systems. It defines global conformation, and ultimately the biological activity and stability of the peptide or protein. It is frequently present, singly or multiply, in biologically important peptide hormones and toxins. Numerous disulfide-containing peptides have been approved by the regulatory agencies as marketed drugs. Chemical synthesis is one of the prerequisite tools needed to gain deep insights into the structure-function relationships of these biomolecules. Along with the development of solid-phase peptide synthesis, a number of methods of disulfide construction have been established. This minireview will focus on the regiospecific, stepwise construction of multiple disulfides used in the chemical synthesis of peptides. We intend for this article to serve a reference for peptide chemists conducting complex peptide syntheses and also hope to stimulate the future development of disulfide methodologies.
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Affiliation(s)
- Rongjun He
- Novo Nordisk Research Center Indianapolis, 5225 Exploration Drive, Indianapolis, IN, 46241, USA
| | - Jia Pan
- Novo Nordisk Research Center China, 20 Life Science Road, Beijing, 102206, P. R. China
| | - John P Mayer
- Department of Molecular, Developmental & Cell Biology, University of Colorado, Boulder, CO, 80309, USA
| | - Fa Liu
- Novo Nordisk Research Center Seattle, 530 Fairview Avenue North, Seattle, WA, 98109, USA
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8
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Patil NA, Karas JA, Wade JD, Hossain MA, Tailhades J. Rapid Photolysis‐Mediated Folding of Disulfide‐Rich Peptides. Chemistry 2019; 25:8599-8603. [DOI: 10.1002/chem.201901334] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Nitin A. Patil
- The Monash Biomedicine Discovery Institute 15 Innovation Walk Clayton VIC 3800 Australia
| | - John A. Karas
- Department of Pharmacology and TherapeuticsThe University of Melbourne Victoria 3010 Australia
| | - John D. Wade
- Department of Pharmacology and TherapeuticsThe University of Melbourne Victoria 3010 Australia
- The Florey Institute of Neuroscience and Mental HealthUniversity of Melbourne 30 Royal Parade, Parkville Victoria 3052 Australia
| | - Mohammed Akhter Hossain
- Department of Pharmacology and TherapeuticsThe University of Melbourne Victoria 3010 Australia
- The Florey Institute of Neuroscience and Mental HealthUniversity of Melbourne 30 Royal Parade, Parkville Victoria 3052 Australia
| | - Julien Tailhades
- The Monash Biomedicine Discovery Institute 15 Innovation Walk Clayton VIC 3800 Australia
- EMBL AustraliaMonash University Clayton Victoria 3800 Australia
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9
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Malkawi R, Iyer A, Parmar A, Lloyd DG, Leng Goh ET, Taylor EJ, Sarmad S, Madder A, Lakshminarayanan R, Singh I. Cysteines and Disulfide-Bridged Macrocyclic Mimics of Teixobactin Analogues and Their Antibacterial Activity Evaluation against Methicillin-Resistant Staphylococcus Aureus (MRSA). Pharmaceutics 2018; 10:pharmaceutics10040183. [PMID: 30314324 PMCID: PMC6321233 DOI: 10.3390/pharmaceutics10040183] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 10/02/2018] [Accepted: 10/09/2018] [Indexed: 11/16/2022] Open
Abstract
Teixobactin is a highly potent cyclic depsipeptide which kills a broad range of multi-drug resistant, Gram-positive bacteria, such as Methicillin-resistant Staphylococcus aureus (MRSA) without detectable resistance. In this work, we describe the design and rapid synthesis of novel teixobactin analogues containing two cysteine moieties, and the corresponding disulfide-bridged cyclic analogues. These analogues differ from previously reported analogues, such as an Arg10-teixobactin, in terms of their macrocyclic ring size, and feature a disulfide bridge instead of an ester linkage. The new teixobactin analogues were screened against Methicillin-resistant Staphylococcus aureus and Methicillin-sensitive Staphylococcus aureus. Interestingly, one teixobactin analogue containing all l-amino acid building blocks showed antibacterial activity against MRSA for the first time. Our data indicates that macrocyclisation of teixobactin analogues with disulfide bridging is important for improved antibacterial activity. In our work, we have demonstrated the unprecedented use of a disulfide bridge in constructing the macrocyclic ring of teixobactin analogues.
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Affiliation(s)
- Ruba Malkawi
- School of Pharmacy, Joseph Banks Laboratories, University of Lincoln, Green Lane, Lincoln LN6 7DL, UK.
| | - Abhishek Iyer
- School of Pharmacy, Joseph Banks Laboratories, University of Lincoln, Green Lane, Lincoln LN6 7DL, UK.
- Organic and Biomimetic Chemistry Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 (S4), B-9000 Ghent, Belgium.
| | - Anish Parmar
- School of Pharmacy, Joseph Banks Laboratories, University of Lincoln, Green Lane, Lincoln LN6 7DL, UK.
| | - Daniel G Lloyd
- School of Life Sciences, Joseph Banks Laboratories, University of Lincoln, Green Lane, Lincoln LN6 7DL, UK.
| | - Eunice Tze Leng Goh
- Singapore Eye Research Institute, The Academia, Discovery Tower Level 6, 20 College Road, Singapore 169857, Singapore.
| | - Edward J Taylor
- School of Life Sciences, Joseph Banks Laboratories, University of Lincoln, Green Lane, Lincoln LN6 7DL, UK.
| | - Sarir Sarmad
- School of Chemistry, Joseph Banks Laboratories, University of Lincoln, Green Lane, Lincoln LN6 7DL, UK.
| | - Annemieke Madder
- Organic and Biomimetic Chemistry Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 (S4), B-9000 Ghent, Belgium.
| | - Rajamani Lakshminarayanan
- Singapore Eye Research Institute, The Academia, Discovery Tower Level 6, 20 College Road, Singapore 169857, Singapore.
| | - Ishwar Singh
- School of Pharmacy, Joseph Banks Laboratories, University of Lincoln, Green Lane, Lincoln LN6 7DL, UK.
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10
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Naraga AMB, Belleza OJV, Villaraza AJL. Total synthesis of μ-conotoxin lt5d. RSC Adv 2018; 8:36579-36583. [PMID: 35558937 PMCID: PMC9088864 DOI: 10.1039/c8ra03706j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 10/23/2018] [Indexed: 11/21/2022] Open
Abstract
The total synthesis of μ-conotoxin lt5d is presented for the first time employing two different strategies.
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Affiliation(s)
- A. M. B. Naraga
- Institute of Chemistry
- College of Science
- National Science Complex
- University of the Philippines
- Quezon City
| | - O. J. V. Belleza
- Institute of Chemistry
- College of Science
- National Science Complex
- University of the Philippines
- Quezon City
| | - A. J. L. Villaraza
- Institute of Chemistry
- College of Science
- National Science Complex
- University of the Philippines
- Quezon City
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11
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Kondasinghe TD, Saraha HY, Odeesho SB, Stockdill JL. Direct palladium-mediated on-resin disulfide formation from Allocam protected peptides. Org Biomol Chem 2017; 15:2914-2918. [PMID: 28327729 PMCID: PMC5475270 DOI: 10.1039/c7ob00536a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of disulfide-containing polypeptides represents a long-standing challenge in peptide chemistry, and broadly applicable methods for the construction of disulfides are in constant demand. Few strategies exist for on-resin formation of disulfides directly from their protected counterparts. We present herein a novel strategy for the on-resin construction of disulfides directly from Allocam-protected cysteines. Our palladium-mediated approach is mild and uses readily available reagents, requiring no special equipment. No reduced peptide intermediates or S-allylated products are observed, and no residual palladium can be detected in the final products. The utility of this method is demonstrated through the synthesis of the C-carboxy analog of oxytocin.
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Affiliation(s)
| | - Hasina Y Saraha
- Department of Chemistry, Wayne State University, Detroit, MI 48202, USA.
| | - Samantha B Odeesho
- Department of Chemistry, Wayne State University, Detroit, MI 48202, USA.
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12
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Zheng Y, Li Z, Ren J, Liu W, Wu Y, Zhao Y, Wu C. Artificial disulfide-rich peptide scaffolds with precisely defined disulfide patterns and a minimized number of isomers. Chem Sci 2017; 8:2547-2552. [PMID: 28553486 PMCID: PMC5431680 DOI: 10.1039/c6sc05710a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Accepted: 02/15/2017] [Indexed: 12/21/2022] Open
Abstract
Disulfide-rich peptides are emerging as potential templates for drug design applications. However, the synthesis and reengineering of disulfide-rich peptides are challenging, owing to the complexity of the oxidative folding process involving a number of diverse isomeric structures. Novel disulfide-rich peptide scaffolds that are not besieged by their disulfide isomers are still greatly desired. In this work, we report the design and synthesis of a novel class of artificial disulfide-rich peptide scaffolds with precisely defined disulfide patterns and a minimized number of isomers. In theory, natural peptides with three disulfide bonds have 15 possible isomers. By rationally engineering the thiol-framework of a peptide containing six cysteines with penicillamines and a dithiol amino acid, we demonstrated, for the first time, that the total number of isomers formed after oxidative folding can be decreased to a minimum of two (i.e., from 15 to 2). As fewer isomeric folds are involved in the oxidative folding, the pathway of the folding becomes more concise and the yield of the artificial scaffolds is substantially increased compared to that of its six-cysteine-containing analogue, which makes the artificial disulfide-rich scaffolds (with only 2 predefined isomeric folds) extremely promising for being exploited as structurally complex templates for the design of peptide therapeutics and ligands.
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Affiliation(s)
- Yiwu Zheng
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation , State Key Laboratory of Physical Chemistry of Solid Surfaces , Collaborative Innovation Center of Chemistry for Energy Materials , Department of Chemistry , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , 361005 , P.R. China .
| | - Zhuoru Li
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation , State Key Laboratory of Physical Chemistry of Solid Surfaces , Collaborative Innovation Center of Chemistry for Energy Materials , Department of Chemistry , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , 361005 , P.R. China .
| | - Jing Ren
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation , State Key Laboratory of Physical Chemistry of Solid Surfaces , Collaborative Innovation Center of Chemistry for Energy Materials , Department of Chemistry , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , 361005 , P.R. China .
| | - Weidong Liu
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation , State Key Laboratory of Physical Chemistry of Solid Surfaces , Collaborative Innovation Center of Chemistry for Energy Materials , Department of Chemistry , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , 361005 , P.R. China .
| | - Yaqi Wu
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation , State Key Laboratory of Physical Chemistry of Solid Surfaces , Collaborative Innovation Center of Chemistry for Energy Materials , Department of Chemistry , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , 361005 , P.R. China .
| | - Yibing Zhao
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation , State Key Laboratory of Physical Chemistry of Solid Surfaces , Collaborative Innovation Center of Chemistry for Energy Materials , Department of Chemistry , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , 361005 , P.R. China .
| | - Chuanliu Wu
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation , State Key Laboratory of Physical Chemistry of Solid Surfaces , Collaborative Innovation Center of Chemistry for Energy Materials , Department of Chemistry , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , 361005 , P.R. China .
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13
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Wu F, Mayer JP, Gelfanov VM, Liu F, DiMarchi RD. Synthesis of Four-Disulfide Insulin Analogs via Sequential Disulfide Bond Formation. J Org Chem 2017; 82:3506-3512. [DOI: 10.1021/acs.joc.6b03078] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fangzhou Wu
- Department
of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - John P. Mayer
- Novo Nordisk
Research
Center Indianapolis, Indianapolis, Indiana 46241, United States
| | - Vasily M. Gelfanov
- Novo Nordisk
Research
Center Indianapolis, Indianapolis, Indiana 46241, United States
| | - Fa Liu
- Novo Nordisk
Research
Center Indianapolis, Indianapolis, Indiana 46241, United States
| | - Richard D. DiMarchi
- Department
of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
- Novo Nordisk
Research
Center Indianapolis, Indianapolis, Indiana 46241, United States
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14
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Katayama H, Goto T. Improvement of stability of phenacyloxycarbamidomethyl (Pocam) group, a cysteine protecting group removable with zinc reduction, under acidic conditions. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2016.12.081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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15
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Molecular Engineering of Conus Peptides as Therapeutic Leads. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 1030:229-254. [DOI: 10.1007/978-3-319-66095-0_10] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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16
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Fischer S, Lamping M, Gold M, Röttger Y, Brödje D, Dodel R, Frantz R, Mraheil MA, Chakraborty T, Geyer A. Synthesis of a biological active β-hairpin peptide by addition of two structural motifs. Bioorg Med Chem 2016; 25:603-608. [PMID: 27887962 DOI: 10.1016/j.bmc.2016.11.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 11/09/2016] [Accepted: 11/13/2016] [Indexed: 12/18/2022]
Abstract
The idea of privileged scaffolds - that there seem to be more bioactive compounds found around some structures than others - is well established for small drug molecules, but has little significance for standalone peptide secondary structures whose adaptable shapes escape the definition of a 3D motif in the absence of a protein scaffold. Here, we joined two independent biological functions in a single highly restricted peptide to support the hypothesis that the β-hairpin shape is the common basis of two otherwise unrelated biological recognition processes. To achieve this, the hydrophobic cluster HWX4LV from the decapeptide cyclic hairpin model peptide C1-C10cyclo-CHWEGNKLVC was included in the bicyclic peptide 2. The designed β-hairpin peptide C4-C17, C8-C13bicyclo-KHQCHWECTZGRCRLVCGRSGS (2, Z=citrulline), serves, on the one hand, as a specific epitope for rheumatoid autoantibodies and, on the other hand, shows a not negligible antibiotic effect against the bacterial strain E. coli AS19.
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Affiliation(s)
- Sabrina Fischer
- Department of Chemistry, Philipps-University Marburg, Hans-Meerwein-Straße 4, 35032 Marburg, Germany
| | - Matthias Lamping
- Department of Chemistry, Philipps-University Marburg, Hans-Meerwein-Straße 4, 35032 Marburg, Germany
| | - Maike Gold
- Department of Neurology, Philipps-University Marburg, Baldingerstraße, 35043 Marburg, Germany
| | - Yvonne Röttger
- Department of Neurology, Philipps-University Marburg, Baldingerstraße, 35043 Marburg, Germany
| | - Dörte Brödje
- Institute for Medical Microbiology and Hospital Hygiene, University Hospital Giessen and Marburg, Hans-Meerwein-Straße, 35033 Marburg, Germany
| | - Richard Dodel
- Department of Neurology, Philipps-University Marburg, Baldingerstraße, 35043 Marburg, Germany
| | - Renate Frantz
- Institute for Medical Microbiology, Justus-Liebig University, Biomedical Research Facility Seltersberg, Schubertstraße 81, 35392 Giessen, Germany
| | - Mobarak Abu Mraheil
- Institute for Medical Microbiology, Justus-Liebig University, Biomedical Research Facility Seltersberg, Schubertstraße 81, 35392 Giessen, Germany
| | - Trinad Chakraborty
- Institute for Medical Microbiology, Justus-Liebig University, Biomedical Research Facility Seltersberg, Schubertstraße 81, 35392 Giessen, Germany
| | - Armin Geyer
- Department of Chemistry, Philipps-University Marburg, Hans-Meerwein-Straße 4, 35032 Marburg, Germany.
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17
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Disulfide cross-linking influences symbiotic activities of nodule peptide NCR247. Proc Natl Acad Sci U S A 2016; 113:10157-62. [PMID: 27551097 DOI: 10.1073/pnas.1610724113] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Interactions of rhizobia with legumes establish the chronic intracellular infection that underlies symbiosis. Within nodules of inverted repeat-lacking clade (IRLC) legumes, rhizobia differentiate into nitrogen-fixing bacteroids. This terminal differentiation is driven by host nodule-specific cysteine-rich (NCR) peptides that orchestrate the adaptation of free-living bacteria into intracellular residents. Medicago truncatula encodes a family of >700 NCR peptides that have conserved cysteine motifs. NCR247 is a cationic peptide with four cysteines that can form two intramolecular disulfide bonds in the oxidized forms. This peptide affects Sinorhizobium meliloti transcription, translation, and cell division at low concentrations and is antimicrobial at higher concentrations. By preparing the three possible disulfide-cross-linked NCR247 regioisomers, the reduced peptide, and a variant lacking cysteines, we performed a systematic study of the effects of intramolecular disulfide cross-linking and cysteines on the activities of an NCR peptide. The relative activities of the five NCR247 variants differed strikingly among the various bioassays, suggesting that the NCR peptide-based language used by plants to control the development of their bacterial partners during symbiosis is even greater than previously recognized. These patterns indicate that certain NCR bioactivities require cysteines whereas others do not. The results also suggest that NCR247 may exert some of its effects within the cell envelope whereas other activities occur in the cytoplasm. BacA, a membrane protein that is critical for symbiosis, provides protection against all bactericidal forms of NCR247. Oxidative folding protects NCR247 from degradation by the symbiotically relevant metalloprotease HrrP (host range restriction peptidase), suggesting that disulfide bond formation may additionally stabilize NCR peptides during symbiosis.
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18
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Katayama H, Mita M. A sulfanyl-PEG derivative of relaxin-like peptide utilizable for the conjugation with KLH and the antibody production. Bioorg Med Chem 2016; 24:3596-602. [DOI: 10.1016/j.bmc.2016.05.068] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 05/20/2016] [Accepted: 05/30/2016] [Indexed: 11/16/2022]
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19
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Maity SK, Jbara M, Laps S, Brik A. Efficient Palladium-Assisted One-Pot Deprotection of (Acetamidomethyl)Cysteine Following Native Chemical Ligation and/or Desulfurization To Expedite Chemical Protein Synthesis. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201603169] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Suman Kumar Maity
- Schulich Faculty of Chemistry; Technion-Israel Institute of Technology; Haifa 3200008 Israel
| | - Muhammad Jbara
- Schulich Faculty of Chemistry; Technion-Israel Institute of Technology; Haifa 3200008 Israel
| | - Shay Laps
- Schulich Faculty of Chemistry; Technion-Israel Institute of Technology; Haifa 3200008 Israel
| | - Ashraf Brik
- Schulich Faculty of Chemistry; Technion-Israel Institute of Technology; Haifa 3200008 Israel
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20
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Maity SK, Jbara M, Laps S, Brik A. Efficient Palladium-Assisted One-Pot Deprotection of (Acetamidomethyl)Cysteine Following Native Chemical Ligation and/or Desulfurization To Expedite Chemical Protein Synthesis. Angew Chem Int Ed Engl 2016; 55:8108-12. [PMID: 27126503 DOI: 10.1002/anie.201603169] [Citation(s) in RCA: 113] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Indexed: 11/09/2022]
Abstract
The acetamidomethyl (Acm) moiety is a widely used cysteine protecting group for the chemical synthesis and semisynthesis of peptide and proteins. However, its removal is not straightforward and requires harsh reaction conditions and additional purification steps before and after the removal step, which extends the synthetic process and reduces the overall yield. To overcome these shortcomings, a method for rapid and efficient Acm removal using Pd(II) complexes in aqueous medium is reported. We show, for the first time, the assembly of three peptide fragments in a one-pot fashion by native chemical ligation where the Acm moiety was used to protect the N-terminal Cys of the middle fragment. Importantly, an efficient synthesis of the ubiquitin-like protein UBL-5, which contains two native Cys residues, was accomplished through the one-pot operation of three key steps, namely ligation, desulfurization, and Acm deprotection, highlighting the great utility of the new approach in protein synthesis.
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Affiliation(s)
- Suman Kumar Maity
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 3200008, Israel
| | - Muhammad Jbara
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 3200008, Israel
| | - Shay Laps
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 3200008, Israel
| | - Ashraf Brik
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 3200008, Israel.
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21
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Zheng Y, Zhai L, Zhao Y, Wu C. Orthogonal Cysteine–Penicillamine Disulfide Pairing for Directing the Oxidative Folding of Peptides. J Am Chem Soc 2015; 137:15094-7. [DOI: 10.1021/jacs.5b10779] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yiwu Zheng
- The MOE Key Laboratory of
Spectrochemical Analysis and Instrumentation, State Key Laboratory
of Physical Chemistry of Solid Surfaces, Department of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Linxiang Zhai
- The MOE Key Laboratory of
Spectrochemical Analysis and Instrumentation, State Key Laboratory
of Physical Chemistry of Solid Surfaces, Department of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Yibing Zhao
- The MOE Key Laboratory of
Spectrochemical Analysis and Instrumentation, State Key Laboratory
of Physical Chemistry of Solid Surfaces, Department of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Chuanliu Wu
- The MOE Key Laboratory of
Spectrochemical Analysis and Instrumentation, State Key Laboratory
of Physical Chemistry of Solid Surfaces, Department of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
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22
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Tailhades J, Sethi A, Petrie EJ, Gooley PR, Bathgate RA, Wade JD, Hossain MA. Native Chemical Ligation to Minimize Aspartimide Formation during Chemical Synthesis of Small LDLa Protein. Chemistry 2015; 22:1146-51. [PMID: 26612092 DOI: 10.1002/chem.201503599] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Indexed: 12/21/2022]
Abstract
The inhibition of the G protein-coupled receptor, relaxin family peptide receptor 1 (RXFP1), by a small LDLa protein may be a potential approach for prostate cancer treatment. However, it is a significant challenge to chemically produce the 41-residue and three-disulfide cross-bridged LDLa module which is highly prone to aspartimide formation due to the presence of several aspartic acid residues. Known palliative measures, including addition of HOBt to piperidine for N(α) -deprotection, failed to completely overcome this side reaction. For this reason, an elegant native chemical ligation approach was employed in which two segments were assembled for generating the linear LDLa protein. Acquisition of correct folding was achieved by using either a regioselective disulfide bond formation or global oxidation strategies. The final synthetic LDLa protein obtained was characterized by NMR spectroscopic structural analysis after chelation with a Ca(2+) ion and confirmed to be equivalent to the same protein obtained by recombinant DNA production.
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Affiliation(s)
- Julien Tailhades
- Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Victoria, 3010, Australia.
| | - Ashish Sethi
- Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Victoria, 3010, Australia
| | - Emma J Petrie
- Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Victoria, 3010, Australia
| | - Paul R Gooley
- Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Victoria, 3010, Australia
| | - Ross A Bathgate
- Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Victoria, 3010, Australia.,Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Victoria, 3010, Australia
| | - John D Wade
- Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Victoria, 3010, Australia. .,The School of Chemistry, The University of Melbourne, Victoria, 3010, Australia.
| | - Mohammed A Hossain
- Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Victoria, 3010, Australia. .,The School of Chemistry, The University of Melbourne, Victoria, 3010, Australia.
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23
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Chua K, Fung E, Micewicz ED, Ganz T, Nemeth E, Ruchala P. Small cyclic agonists of iron regulatory hormone hepcidin. Bioorg Med Chem Lett 2015; 25:4961-4969. [PMID: 25813158 PMCID: PMC4567957 DOI: 10.1016/j.bmcl.2015.03.012] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Revised: 02/28/2015] [Accepted: 03/04/2015] [Indexed: 02/03/2023]
Abstract
Minihepcidins are in vitro and in vivo active mimetics of iron-regulatory hormone hepcidin. They contain various unusual amino acids including: N-substituted, β-homo-, and d-amino acids with their combination depending on particular minihepcidin. In the current study, we sought to limit the use of unusual/more expensive amino acids derivatives by peptide cyclization. Novel cyclic mimetics of hepcidin were synthesized and tested in vitro and showed activity at low nanomolar concentration. Nonetheless, the most active cyclic compound (mHS17) is approximately ten times less active than the parental minihepcidin PR73. Collectively, our findings suggest that cyclization is viable approach in the synthesis of hepcidin mimetics.
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Affiliation(s)
- Kristine Chua
- Department of Medicine, University of California at Los Angeles, 10833 Le Conte Avenue, Los Angeles, CA 90095, USA
| | - Eileen Fung
- Department of Medicine, University of California at Los Angeles, 10833 Le Conte Avenue, Los Angeles, CA 90095, USA
| | - Ewa D Micewicz
- Department of Radiation Oncology, University of California at Los Angeles, 10833 Le Conte Avenue, Los Angeles, CA 90095, USA
| | - Tomas Ganz
- Department of Medicine, University of California at Los Angeles, 10833 Le Conte Avenue, Los Angeles, CA 90095, USA
| | - Elizabeta Nemeth
- Department of Medicine, University of California at Los Angeles, 10833 Le Conte Avenue, Los Angeles, CA 90095, USA
| | - Piotr Ruchala
- Department of Psychiatry and Biobehavioral Sciences, University of California at Los Angeles, 760 Westwood Plaza, Los Angeles, CA 90095, USA; The Pasarow Mass Spectrometry Laboratory, The Jane and Terry Semel Institute for Neuroscience and Human Behavior, 760 Westwood Plaza, Los Angeles, CA 90095, USA.
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24
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Guo Y, Sun DM, Wang FL, He Y, Liu L, Tian CL. Diaminodiacid Bridges to Improve Folding and Tune the Bioactivity of Disulfide-Rich Peptides. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201500699] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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25
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Guo Y, Sun D, Wang F, He Y, Liu L, Tian C. Diaminodiacid Bridges to Improve Folding and Tune the Bioactivity of Disulfide‐Rich Peptides. Angew Chem Int Ed Engl 2015; 54:14276-81. [DOI: 10.1002/anie.201500699] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2015] [Revised: 04/07/2015] [Indexed: 12/11/2022]
Affiliation(s)
- Ye Guo
- Tsinghua‐Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084 (China)
| | - De‐Meng Sun
- Tsinghua‐Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084 (China)
| | - Feng‐Liang Wang
- Department of Chemistry, University of Science and Technology of China, Hefei 230026 (China)
| | - Yao He
- Hefei National Laboratory for Physical Sciences at the Microscale and School of Life Sciences, University of Science and Technology of China and High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, 230027 (China)
| | - Lei Liu
- Tsinghua‐Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084 (China)
| | - Chang‐Lin Tian
- Hefei National Laboratory for Physical Sciences at the Microscale and School of Life Sciences, University of Science and Technology of China and High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, 230027 (China)
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26
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Mochizuki M, Tsuda S, Tanimura K, Nishiuchi Y. Regioselective Formation of Multiple Disulfide Bonds with the Aid of Postsynthetic S-Tritylation. Org Lett 2015; 17:2202-5. [DOI: 10.1021/acs.orglett.5b00786] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Shugo Tsuda
- Peptide Institute, Inc., Ibaraki, Osaka 567-0085, Japan
| | | | - Yuji Nishiuchi
- Peptide Institute, Inc., Ibaraki, Osaka 567-0085, Japan
- Graduate
School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
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27
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Rattanangkool E, Krailat W, Vilaivan T, Phuwapraisirisan P, Sukwattanasinitt M, Wacharasindhu S. Hypervalent Iodine(III)-Promoted Metal-Free S-H Activation: An Approach for the Construction of S-S, S-N, and S-C Bonds. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402180] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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28
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Karas JA, Scanlon DB, Forbes BE, Vetter I, Lewis RJ, Gardiner J, Separovic F, Wade JD, Hossain MA. 2-Nitroveratryl as a Photocleavable Thiol-Protecting Group for Directed Disulfide Bond Formation in the Chemical Synthesis of Insulin. Chemistry 2014; 20:9549-52. [DOI: 10.1002/chem.201403574] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2014] [Indexed: 12/20/2022]
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29
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Akondi KB, Muttenthaler M, Dutertre S, Kaas Q, Craik DJ, Lewis RJ, Alewood PF. Discovery, synthesis, and structure-activity relationships of conotoxins. Chem Rev 2014; 114:5815-47. [PMID: 24720541 PMCID: PMC7610532 DOI: 10.1021/cr400401e] [Citation(s) in RCA: 232] [Impact Index Per Article: 23.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
| | | | - Sébastien Dutertre
- Institute for Molecular Bioscience, The University of Queensland, Brisbane QLD 4072, Australia
| | - Quentin Kaas
- Institute for Molecular Bioscience, The University of Queensland, Brisbane QLD 4072, Australia
| | - David J Craik
- Institute for Molecular Bioscience, The University of Queensland, Brisbane QLD 4072, Australia
| | - Richard J Lewis
- Institute for Molecular Bioscience, The University of Queensland, Brisbane QLD 4072, Australia
| | - Paul F Alewood
- Institute for Molecular Bioscience, The University of Queensland, Brisbane QLD 4072, Australia
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30
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Váradi G, Tóth GK, Kele Z, Galgóczy L, Fizil Á, Batta G. Synthesis of PAF, an antifungal protein from P. chrysogenum, by native chemical ligation: native disulfide pattern and fold obtained upon oxidative refolding. Chemistry 2014; 19:12684-92. [PMID: 24175344 DOI: 10.1002/chem.201301098] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The folding of disulfide proteins is of considerable interest because knowledge of this may influence our present understanding of protein folding. However, sometimes even the disulfide pattern cannot be unequivocally determined by the available experimental techniques. For example, the structures of a few small antifungal proteins (PAF, AFP) have been disclosed recently using NMR spectroscopy but with some ambiguity in the actual disulfide pattern. For this reason, we carried out the chemical synthesis of PAF. Probing different approaches, the oxidative folding of the synthetic linear PAF yielded a folded protein that has identical structure and antifungal activity as the native PAF. In contrast, unfolded linear PAF was inactive, a result that may have implications concerning its redox state in the mode of action.
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31
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Nguyen TTN, Folch B, Létourneau M, Truong NH, Doucet N, Fournier A, Chatenet D. Design of a truncated cardiotoxin-I analogue with potent insulinotropic activity. J Med Chem 2014; 57:2623-33. [PMID: 24552570 DOI: 10.1021/jm401904q] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Insulin secretion by pancreatic β-cells in response to glucose or other secretagogues is tightly coupled to membrane potential. Various studies have highlighted the prospect of enhancing insulin secretion in a glucose-dependent manner by blocking voltage-gated potassium channels (K(v)) and calcium-activated potassium channels (K(Ca)). Such strategy is expected to present a lower risk for hypoglycemic events compared to KATP channel blockers. Our group recently reported the discovery of a new insulinotropic agent, cardiotoxin-I (CTX-I), from the Naja kaouthia snake venom. In the present study, we report the design and synthesis of [Lys(52)]CTX-I(41-60) via structure-guided modification, a truncated, equipotent analogue of CTX-I, and demonstrate, using various pharmacological inhibitors, that this derivative probably exerts its action through Kv channels. This new analogue could represent a useful pharmacological tool to study β-cell physiology or even open a new therapeutic avenue for the treatment of type 2 diabetes.
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Affiliation(s)
- Thi Tuyet Nhung Nguyen
- INRS-Institut Armand-Frappier , Université du Québec , 531 Boulevard des Prairies Ville de Laval, Québec H7 V 1B7, Québec Canada
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32
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Dekan Z, Mobli M, Pennington MW, Fung E, Nemeth E, Alewood PF. Total Synthesis of Human Hepcidin through Regioselective Disulfide-Bond Formation by using the Safety-Catch Cysteine Protecting Group 4,4′-Dimethylsulfinylbenzhydryl. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201310103] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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33
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Dekan Z, Mobli M, Pennington MW, Fung E, Nemeth E, Alewood PF. Total Synthesis of Human Hepcidin through Regioselective Disulfide-Bond Formation by using the Safety-Catch Cysteine Protecting Group 4,4′-Dimethylsulfinylbenzhydryl. Angew Chem Int Ed Engl 2014; 53:2931-4. [DOI: 10.1002/anie.201310103] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2013] [Revised: 12/30/2013] [Indexed: 11/08/2022]
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34
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Abstract
We report a set of concise and efficient routes for the chemical synthesis of human insulin using a two- or three-step combination procedure that employs Trt, Acm, and t-Bu cysteine protection schemes. Starting with resin-bound assembled A and B chains, human insulin can be obtained within the span of a single work day in 5.4% overall yield based on the crude A or B chain.
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Affiliation(s)
- Fa Liu
- Lilly Research Laboratories, Indianapolis, Indiana 46285, United States.
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35
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Lin Z, Li L, Yang Y, Zhan H, Hu Y, Zhou Z, Zhu J, Wang Q, Deng J. The self-assembly of cystine-bridged γ-peptide-based cyclic peptide–dendron hybrids. Org Biomol Chem 2013; 11:8443-51. [DOI: 10.1039/c3ob40532j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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36
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Abstract
Cystine-knot miniproteins, also known as knottins, contain a conserved core of three tightly woven disulfide bonds which impart extraordinary thermal and proteolytic stability. Interspersed between their conserved cysteine residues are constrained loops that possess high levels of sequence diversity among knottin family members. Together these attributes make knottins promising molecular scaffolds for protein engineering and translational applications. While naturally occurring knottins have shown potential as both diagnostic agents and therapeutics, protein engineering is playing an important and increasing role in creating designer molecules that bind to a myriad of biomedical targets. Toward this goal, rational and combinatorial approaches have been used to engineer knottins with novel molecular recognition properties. Here, methods are described for creating and screening knottin libraries using yeast surface display and fluorescence-activated cell sorting. Protocols are also provided for producing knottins by synthetic and recombinant methods, and for measuring the binding affinity of knottins to target proteins expressed on the cell surface.
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Affiliation(s)
- Sarah J Moore
- Department of Bioengineering, Cancer Institute, and Bio-X Program, Stanford University, Stanford, California, USA
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37
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Hydrophobic tag-assisted liquid-phase synthesis of a growth hormone-inhibiting peptide somatostatin. Bioorg Med Chem Lett 2011; 21:4476-9. [DOI: 10.1016/j.bmcl.2011.06.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2011] [Revised: 05/24/2011] [Accepted: 06/01/2011] [Indexed: 01/18/2023]
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38
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Góngora-Benítez M, Tulla-Puche J, Paradís-Bas M, Werbitzky O, Giraud M, Albericio F. Optimized Fmoc solid-phase synthesis of the cysteine-rich peptide linaclotide. Biopolymers 2010; 96:69-80. [DOI: 10.1002/bip.21480] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2010] [Revised: 03/27/2010] [Accepted: 04/19/2010] [Indexed: 11/11/2022]
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39
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Bingham JP, Mitsunaga E, Bergeron ZL. Drugs from slugs--past, present and future perspectives of omega-conotoxin research. Chem Biol Interact 2010; 183:1-18. [PMID: 19800874 DOI: 10.1016/j.cbi.2009.09.021] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2009] [Revised: 09/03/2009] [Accepted: 09/24/2009] [Indexed: 12/18/2022]
Abstract
Peptides from the venom of carnivorous cone shells have provided six decades of intense research, which has led to the discovery and development of novel analgesic peptide therapeutics. Our understanding of this unique natural marine resource is however somewhat limited. Given the past pharmacological record, future investigations into the toxinology of these highly venomous tropical marine snails will undoubtedly yield other highly selective ion channel inhibitors and modulators. With over a thousand conotoxin-derived sequences identified to date, those identified as ion channel inhibitors represent only a small fraction of the total. Here we discuss our present understanding of conotoxins, focusing on the omega-conotoxin peptide family, and illustrate how such a seemingly simple snail has yielded a highly effective clinical drug.
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Affiliation(s)
- Jon-Paul Bingham
- Department of Molecular Biosciences and Bioengineering, University of Hawaii, Honolulu, HI 96822, USA.
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40
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Tian X, Michal AM, Li P, Wolfe HR, Waldman SA, Wickstrom E. STa peptide analogs for probing guanylyl cyclase C. Biopolymers 2008; 90:713-23. [PMID: 18615494 DOI: 10.1002/bip.21045] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Guanylyl cyclase C (GC-C), universally overexpressed on primary and metastatic colorectal carcinoma cells, is activated by endogenous ligands, guanylin, and uroguanylin, and by exogenous 18-residue heat-stable enterotoxins (STa) produced by diarrheagenic bacteria. Two 12-residue STa analogs with alternate combinations of two interlocked disulfide bonds, peptides 3 and 6, were synthesized by orthogonal solid phase synthesis routes. Peptides 3 and 6 bound GC-C with a rank order potency of STa > peptide 3 > peptide 6. Peptides 3 and 6 behaved as agonists in stimulating cGMP production. The results reveal that the toxic domain of STa can be reduced to 12 amino acids.
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Affiliation(s)
- Xiaobing Tian
- Department of Biochemistry and Molecular Biology, Thomas Jefferson University, Philadelphia, PA 19107, USA
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41
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Bulaj G, Olivera BM. Folding of conotoxins: formation of the native disulfide bridges during chemical synthesis and biosynthesis of Conus peptides. Antioxid Redox Signal 2008; 10:141-55. [PMID: 17961068 DOI: 10.1089/ars.2007.1856] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Conopeptides from >700 species of predatory marine Conus snails provide an impressive molecular diversity of cysteine-rich peptides. Most of the estimated 50,000-100,000 distinct conopeptides range in size from 10 to 50 amino acid residues, often with multiple posttranslational modifications. The great majority contain from two to four disulfide bridges. As the biosynthetic and chemical production of this impressive repertoire of disulfide-rich peptides has been investigated, particularly the formation of native disulfide bridges, differences between in vivo and in vitro oxidative folding have become increasingly evident. In this article, we provide an overview of the molecular diversity of conotoxins with an emphasis on the cysteine patterns and disulfide frameworks. The conotoxin folding studies reviewed include regioselective and direct oxidation strategies, recombinant expression, optimization of folding methods, mechanisms of in vitro folding, and preliminary data on the biosynthesis of conotoxins in venom ducts. Despite these studies, how the cone snails efficiently produce properly folded conotoxins remains unanswered. As chemists continue to master oxidative folding techniques, insights gleaned from how conotoxins are folded in vivo will likely lead to the development of the new folding methods, as well as shed some light on fundamental mechanisms relevant to the protein folding problem.
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Affiliation(s)
- Grzegorz Bulaj
- Department of Medicinal Chemistry, College of Pharmacy, Salt Lake City, Utah 84108, USA.
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42
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Harris KM, Flemer S, Hondal RJ. Studies on deprotection of cysteine and selenocysteine side-chain protecting groups. J Pept Sci 2007; 13:81-93. [PMID: 17031870 PMCID: PMC3689433 DOI: 10.1002/psc.795] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2006] [Accepted: 08/08/2006] [Indexed: 11/05/2022]
Abstract
We present here a simple method for deprotecting p-methoxybenzyl groups and acetamidomethyl groups from the side-chains of cysteine and selenocysteine. This method uses the highly elecrophilic, aromatic disulfides 2,2'-dithiobis(5-nitropyridine) (DTNP) and 2,2'-dithiodipyridine (DTP) dissolved in TFA to effect removal of these heretofore difficult-to-remove protecting groups. The dissolution of these reagents in TFA, in fact, serves to 'activate' them for the deprotection reaction because protonation of the nitrogen atom of the pyridine ring makes the disulfide bond more electrophilic. Thus, these reagents can be added to any standard cleavage cocktail used in peptide synthesis.The p-methoxybenzyl group of selenocysteine is easily removed by DTNP. Only sub-stoichiometric amounts of DTNP are required to cause full removal of the p-methoxybenzyl group, with as little as 0.2 equivalents necessary to effect 70% removal of the protecting group. In order to remove the p-methoxybenzyl group from cysteine, 2 equivalents of DTNP and the addition of thioanisole was required to effect removal. Thioanisole was absolutely required for the reaction in the case of the sulfur-containing amino acids, while it was not required for selenocysteine. The results were consistent with thioanisole acting as a catalyst. The acetamidomethyl group of cysteine could also be removed using DTNP, but required the addition of > 15 equivalents to be effective. DTP was less robust as a deprotection reagent. We also demonstrate that this chemistry can be used in a simultaneous cyclization/deprotection reaction between selenocysteine and cysteine residues protected by p-methoxybenzyl groups to form a selenylsulfide bond, demonstrating future high utility of the deprotection method.
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Affiliation(s)
- Katharine M. Harris
- Department of Biochemistry, 89 Beaumont Ave, Given Laboratory, Room B413, Burlington, VT 05405
| | - Stevenson Flemer
- Department of Biochemistry, 89 Beaumont Ave, Given Laboratory, Room B413, Burlington, VT 05405
| | - Robert J. Hondal
- Department of Biochemistry, 89 Beaumont Ave, Given Laboratory, Room B413, Burlington, VT 05405
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43
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Han YH, Wang Q, Jiang H, Liu L, Xiao C, Yuan DD, Shao XX, Dai QY, Cheng JS, Chi CW. Characterization of novel M-superfamily conotoxins with new disulfide linkage. FEBS J 2006; 273:4972-82. [PMID: 17042781 DOI: 10.1111/j.1742-4658.2006.05493.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The M-superfamily with the typical Cys framework (-CC-C-C-CC-) is one of the seven major superfamilies of conotoxins found in the venom of cone snails. Based on the number of residues in the last Cys loop (between C4 and C5), M-superfamily conotoxins can be provisionally categorized into four branches (M-1, M-2, M-3, M-4) [Corpuz GP, Jacobsen RB, Jimenez EC, Watkins M, Walker C, Colledge C, Garrett JE, McDougal O, Li W, Gray WR, et al. (2005) Biochemistry44, 8176-8186]. Here we report the purification of seven M-superfamily conotoxins from Conus marmoreus (five are novel and two are known as mr3a and mr3b) and one known M-1 toxin tx3a from Conus textile. In addition, six novel cDNA sequences of M-superfamily conotoxins have been identified from C. marmoreus, Conus leopardus and Conus quercinus. Most of the above novel conotoxins belong to M-1 and M-2 and only one to M-3. The disulfide analyses of two M-1 conotoxins, mr3e and tx3a, revealed that they possess a new disulfide bond arrangement (C1-C5, C2-C4, C3-C6) which is different from those of the M-4 branch (C1-C4, C2-C5, C3-C6) and M-2 branch (C1-C6, C2-C4, C3-C5). This newly characterized disulfide connectivity was confirmed by comparing the HPLC profiles of native mr3e and its two regioselectively folded isoforms. This is the first report of three different patterns of disulfide connectivity in conotoxins with the same cysteine framework.
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Affiliation(s)
- Yu-Hong Han
- Key Laboratory of Proteomics, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Graduate School of the Chinese Academy of Sciences, 320 YueYang Road, Shanghai 200031, China
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Indrevoll B, Kindberg GM, Solbakken M, Bjurgert E, Johansen JH, Karlsen H, Mendizabal M, Cuthbertson A. NC-100717: a versatile RGD peptide scaffold for angiogenesis imaging. Bioorg Med Chem Lett 2006; 16:6190-3. [PMID: 17000103 DOI: 10.1016/j.bmcl.2006.09.033] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2006] [Accepted: 09/09/2006] [Indexed: 10/24/2022]
Abstract
Targeting the molecular pathways associated with angiogenesis offers great potential in detecting disease pathology using in vivo imaging technologies. Initiation of angiogenesis requires activation and migration of endothelial cells in order for neovascularization to proceed. Endothelial cells associate with the extracellular matrix through specific interactions with a variety of cell adhesion receptors known as integrins. Peptides containing the tripeptide sequence RGD are known to bind with high affinity to the alphavbeta3 and alphavbeta5 integrins associated with angiogenesis. We present herein the synthesis and in vitro binding affinity of the RGD-containing peptide NC-100717 and a range of molecular probes derived from this intermediate.
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Affiliation(s)
- Bård Indrevoll
- GE Healthcare, Medical Diagnostics, Discovery Research, Oslo, Norway
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Klüver E, Adermann K, Schulz A. Synthesis and structure-activity relationship of beta-defensins, multi-functional peptides of the immune system. J Pept Sci 2006; 12:243-57. [PMID: 16491514 DOI: 10.1002/psc.749] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
beta-defensins are a large family of multiple disulfide-bonded peptides occurring in mammals and birds. They play an important role in the innate immune system, directly killing microbial organisms. Recent research has demonstrated that beta-defensins are important for other biological functions beyond antimicrobial effects, including inhibition of viral infection, interaction with Toll-like receptors, chemotactic effects, and sperm function. The corresponding broad spectrum of activities makes this peptide class an important subject and tool in immunologic research. In this review, we summarize the current status of the routes to obtain synthetic beta-defensins, their major structural properties and structure-activity relationship.
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Mollica A, Davis P, Ma SW, Porreca F, Lai J, Hruby VJ. Synthesis and biological activity of the first cyclic biphalin analogues. Bioorg Med Chem Lett 2006; 16:367-72. [PMID: 16275086 DOI: 10.1016/j.bmcl.2005.09.080] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2005] [Revised: 09/23/2005] [Accepted: 09/28/2005] [Indexed: 10/25/2022]
Abstract
Biphalin is a linear octapeptide with strong opioid activity. Its structure is based on two identical sequences derived from enkephalins joined C-terminal to C-terminal by an hydrazide bridge (Tyr-D-Ala-Gly-Phe-NH-NH<--Phe<--Gly<--D-Ala<--Tyr). In this study we present the design, synthesis, and biological evaluation of the first cyclic biphalin analogues. d-Alanine residues in positions 2, 2' of the parent peptide were replaced by d- and l-cysteine and an intramolecular disulfide bond between the cysteine thiol groups was introduced. We obtained two cyclic analogues with quite different biological profiles.
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Affiliation(s)
- Adriano Mollica
- Department of Chemistry, University of Arizona, Tucson, AZ 85721, USA
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Dufresne MH, Gauthier MA, Leroux JC. Thiol-functionalized polymeric micelles: from molecular recognition to improved mucoadhesion. Bioconjug Chem 2005; 16:1027-33. [PMID: 16029046 DOI: 10.1021/bc050007b] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Surface-modified colloids which can selectively interact with biological species or surfaces show promise as drug delivery systems. However, the preparation of such targeted devices remains challenging, especially when considering polyion complex micelles for which side reactions with the ionic core components (typically carboxylic acid or amino groups) can occur. To solve this issue, an innovative synthetic strategy is proposed and used to prepare an asymmetric poly(ethylene glycol)-block-poly(2-(N,N-dimethylamino)ethyl methacrylate) copolymer presenting a thiol group at the end of the poly(ethylene glycol) chain. Thiol groups are highly appealing given that they react almost exclusively and quantitatively with maleimides under physiological conditions, thereby facilitating the chemical functionalization of the copolymer. The simplicity of the derivatization procedure is illustrated by preparing model biotin-capped copolymers. The biotinylated copolymers are shown to self-assemble with an oligonucleotide in aqueous media to form polyion complex micelles with biotin groups at their outer surface. These micelles are capable of molecular recognition toward streptavidin. Alternatively, thiol-decorated (nonderivatized) micelles are prepared and show improved mucoadhesion through the formation of disulfide bonds with mucin. Finally, intermicellar disulfide bonds are generated under oxidative conditions to promote the formation of stimuli-responsive micellar networks.
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Affiliation(s)
- Marie-Hélène Dufresne
- Canada Research Chair in Drug Delivery, Faculty of Pharmacy, University of Montreal, P.O. Box 6128, Downtown Station, Montreal (QC), Canada, H3C 3J7
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Schulz A, Klüver E, Schulz-Maronde S, Adermann K. Engineering disulfide bonds of the novel human beta-defensins hBD-27 and hBD-28: differences in disulfide formation and biological activity among human beta-defensins. Biopolymers 2005; 80:34-49. [PMID: 15625724 DOI: 10.1002/bip.20193] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Human beta-defensins comprise a large number of peptides that play a functional role in the innate and adaptive immune system. Recently, clusters of new beta-defensin genes with predominant expression in testicular tissue have been discovered on different chromosomes by bioinformatics. beta-Defensins share a common pattern of three disulfides that are essential for their biological effects. Here we report for the first time the chemical synthesis of the new fully disulfide-bonded beta-defensins hBD-27 and hBD-28, and compare the results with synthetic procedures to obtain the known hBD-2 and hBD-3. While hBD-27 was readily converted into a product with the desired disulfide pattern by oxidative folding, hBD-28 required a selective protective group strategy to introduce the three disulfide bonds. The established synthetic processes were applied to the synthesis of hBD-2, which, like hBD-27, was accessible by oxidative folding, whereas hBD-3 required a selective strategy comparable to hBD-28. Experimental work demonstrated that trityl, acetamidomethyl, and t-butyl are superior to other protection strategies. However, the suitable pairwise arrangement of the protective groups can be different, as shown here for hBD-3 and hBD-28. Determination of the minimum inhibitory concentration against different bacteria revealed that hBD-27, in contrast to other beta-defensins tested, has virtually no antimicrobial activity. Compared to the other peptides tested, hBD-27 showed almost no cytotoxic activity, measured by hemoglobin release of erythrocytes. This might be due to the low positive net charge, which is significantly higher for hBD-2, hBD-3, and hBD-28.
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Affiliation(s)
- Axel Schulz
- IPF PharmaCeuticals GmbH, Feodor-Lynen-Strasse 31, D-30625 Hannover, Germany.
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