1
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Ai H, Pan M, Liu L. Chemical Synthesis of Human Proteoforms and Application in Biomedicine. ACS CENTRAL SCIENCE 2024; 10:1442-1459. [PMID: 39220697 PMCID: PMC11363345 DOI: 10.1021/acscentsci.4c00642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Revised: 07/04/2024] [Accepted: 07/05/2024] [Indexed: 09/04/2024]
Abstract
Limited understanding of human proteoforms with complex posttranslational modifications and the underlying mechanisms poses a major obstacle to research on human health and disease. This Outlook discusses opportunities and challenges of de novo chemical protein synthesis in human proteoform studies. Our analysis suggests that to develop a comprehensive, robust, and cost-effective methodology for chemical synthesis of various human proteoforms, new chemistries of the following types need to be developed: (1) easy-to-use peptide ligation chemistries allowing more efficient de novo synthesis of protein structural domains, (2) robust temporary structural support strategies for ligation and folding of challenging targets, and (3) efficient transpeptidative protein domain-domain ligation methods for multidomain proteins. Our analysis also indicates that accurate chemical synthesis of human proteoforms can be applied to the following aspects of biomedical research: (1) dissection and reconstitution of the proteoform interaction networks, (2) structural mechanism elucidation and functional analysis of human proteoform complexes, and (3) development and evaluation of drugs targeting human proteoforms. Overall, we suggest that through integrating chemical protein synthesis with in vivo functional analysis, mechanistic biochemistry, and drug development, synthetic chemistry would play a pivotal role in human proteoform research and facilitate the development of precision diagnostics and therapeutics.
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Affiliation(s)
- Huasong Ai
- New
Cornerstone Science Laboratory, Tsinghua-Peking Joint Center for Life
Sciences, MOE Key Laboratory of Bioorganic Phosphorus Chemistry and
Chemical Biology, Center for Synthetic and Systems Biology, Department
of Chemistry, Tsinghua University, Beijing 100084, China
- Institute
of Translational Medicine, School of Pharmacy, School of Chemistry
and Chemical Engineering, National Center for Translational Medicine
(Shanghai), Shanghai Jiao Tong University, Shanghai 200240, China
| | - Man Pan
- Institute
of Translational Medicine, School of Pharmacy, School of Chemistry
and Chemical Engineering, National Center for Translational Medicine
(Shanghai), Shanghai Jiao Tong University, Shanghai 200240, China
| | - Lei Liu
- New
Cornerstone Science Laboratory, Tsinghua-Peking Joint Center for Life
Sciences, MOE Key Laboratory of Bioorganic Phosphorus Chemistry and
Chemical Biology, Center for Synthetic and Systems Biology, Department
of Chemistry, Tsinghua University, Beijing 100084, China
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2
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Diemer V, Roy E, Agouridas V, Melnyk O. Protein desulfurization and deselenization. Chem Soc Rev 2024; 53:8521-8545. [PMID: 39010733 DOI: 10.1039/d4cs00135d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/17/2024]
Abstract
Methods enabling the dechalcogenation of thiols or selenols have been investigated and developed for a long time in fields of research as diverse as the study of prebiotic chemistry, the engineering of fuel processing techniques, the study of biomolecule structures and function or the chemical synthesis of biomolecules. The dechalcogenation of thiol or selenol amino acids is nowadays a particularly flourishing area of research for being a pillar of modern chemical protein synthesis, when used in combination with thiol or selenol-based chemoselective peptide ligation chemistries. This review offers a comprehensive and scholarly overview of the field, emphasizing emerging trends and providing a detailed and critical mechanistic discussion of the dechalcogenation methods developed so far. Taking advantage of recently published reports, it also clarifies some unexpected desulfurization reactions that were observed in the past and for which no explanation was provided at the time. Additionally, the review includes a discussion on principal desulfurization methods within the framework of newly introduced green chemistry metrics and toolkits, providing a well-rounded exploration of the subject.
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Affiliation(s)
- Vincent Diemer
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 9017, Center for Infection and Immunity of Lille, F-59000 Lille, France.
| | - Eliott Roy
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 9017, Center for Infection and Immunity of Lille, F-59000 Lille, France.
| | - Vangelis Agouridas
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 9017, Center for Infection and Immunity of Lille, F-59000 Lille, France.
- Centrale Lille, F-59000 Lille, France
| | - Oleg Melnyk
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 9017, Center for Infection and Immunity of Lille, F-59000 Lille, France.
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3
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Ablat G, Lawton N, Alam R, Haynes BA, Hossain S, Hicks T, Evans SL, Jarvis JA, Nott TJ, Isaacson RL, Müller MM. Kinetic Resolution of Epimeric Proteins Enables Stereoselective Chemical Mutagenesis. J Am Chem Soc 2024; 146:22622-22628. [PMID: 39083370 PMCID: PMC11328163 DOI: 10.1021/jacs.4c07103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2024]
Abstract
Chemical mutagenesis via dehydroalanine (Dha) is a powerful method to tailor protein structure and function, allowing the site-specific installation of post-translational modifications and non-natural functional groups. Despite the impressive versatility of this method, applications have been limited, as products are formed as epimeric mixtures, whereby the modified amino acid is present as both the desired l-configuration and a roughly equal amount of the undesired d-isomer. Here, we describe a simple remedy for this issue: removal of the d-isomer via proteolysis using a d-stereoselective peptidase, alkaline d-peptidase (AD-P). We demonstrate that AD-P can selectively cleave the d-isomer of epimeric residues within histone H3, GFP, Ddx4, and SGTA, allowing the installation of non-natural amino acids with stereochemical control. Given the breadth of modifications that can be introduced via Dha and the simplicity of our method, we believe that stereoselective chemoenzymatic mutagenesis will find broad utility in protein engineering and chemical biology applications.
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Affiliation(s)
- Guljannat Ablat
- Department of Chemistry, King's College London, Britannia House, 7 Trinity Street, London SE1 1DB, U.K
| | - Neev Lawton
- Department of Chemistry, King's College London, Britannia House, 7 Trinity Street, London SE1 1DB, U.K
| | - Ruqaiya Alam
- Department of Chemistry, King's College London, Britannia House, 7 Trinity Street, London SE1 1DB, U.K
| | - Bethany A Haynes
- Department of Chemistry, King's College London, Britannia House, 7 Trinity Street, London SE1 1DB, U.K
| | - Sabrina Hossain
- Department of Chemistry, King's College London, Britannia House, 7 Trinity Street, London SE1 1DB, U.K
| | - Thomas Hicks
- Department of Chemistry, King's College London, Britannia House, 7 Trinity Street, London SE1 1DB, U.K
| | - Sasha L Evans
- Department of Chemistry, King's College London, Britannia House, 7 Trinity Street, London SE1 1DB, U.K
| | - James A Jarvis
- Randall Centre for Cell and Molecular Biophysics and Centre for Biomolecular Spectroscopy, King's College London, New Hunts House, London SE1 1UL, U.K
| | - Timothy J Nott
- Department of Chemistry, King's College London, Britannia House, 7 Trinity Street, London SE1 1DB, U.K
| | - Rivka L Isaacson
- Department of Chemistry, King's College London, Britannia House, 7 Trinity Street, London SE1 1DB, U.K
| | - Manuel M Müller
- Department of Chemistry, King's College London, Britannia House, 7 Trinity Street, London SE1 1DB, U.K
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4
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Guo HM, Wang JJ, Xiong Y, Wu X. Visible-Light-Driven Multicomponent Reactions for the Versatile Synthesis of Thioamides by Radical Thiocarbamoylation. Angew Chem Int Ed Engl 2024:e202409605. [PMID: 38975961 DOI: 10.1002/anie.202409605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2024] [Revised: 07/06/2024] [Accepted: 07/08/2024] [Indexed: 07/09/2024]
Abstract
Thioamides are widely used structures in pharmaceuticals and agrochemicals, as well as important synthons for the construction of sulfur-containing heterocycles. This report presents a series of visible-light-driven multicomponent reactions of amines, carbon disulfide, and olefins for the mild and versatile synthesis of linear thioamides and cyclic thiolactams. The use of inexpensive and readily available carbon disulfide as the thiocarbonyl source in a radical pathway enables the facile assembly of structurally diverse amine moieties with non-nucleophilic carbon-based reaction partners. Radical thiocarbamoylative cyclization provides a practical protocol that complements traditional approaches to thiolactams relying on deoxythionation. Mechanistic studies reveal that direct photoexcitation of in situ formed dithiocarbamate anions as well as versatile photoinduced electron transfer with diverse electron acceptors are key to the reactions.
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Affiliation(s)
- Hong-Mei Guo
- Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Jia-Jin Wang
- Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Yanjiao Xiong
- Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Xuesong Wu
- Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
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5
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Smith FR, Meehan D, Griffiths RC, Knowles HJ, Zhang P, Williams HEL, Wilson AJ, Mitchell NJ. Peptide macrocyclisation via intramolecular interception of visible-light-mediated desulfurisation. Chem Sci 2024; 15:9612-9619. [PMID: 38939126 PMCID: PMC11206203 DOI: 10.1039/d3sc05865d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Accepted: 04/30/2024] [Indexed: 06/29/2024] Open
Abstract
Synthetic methods that enable the macrocyclisation of peptides facilitate the development of effective therapeutic and diagnostic tools. Herein we report a peptide cyclisation strategy based on intramolecular interception of visible-light-mediated cysteine desulfurisation. This method allows cyclisation of unprotected peptides in an aqueous solution via the installation of a hydrocarbon linkage. We explore the limits of this chemistry using a range of model peptides of increasing length and complexity, including peptides of biological/therapeutic relevance. The method is applied to replace the native disulfide of the peptide hormone, oxytocin, with a proteolytically/redox-stable hydrocarbon, and internal macrocyclisation of an MCL-1-binding peptide.
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Affiliation(s)
- Frances R Smith
- School of Chemistry, University of Nottingham, University Park Nottingham NG7 2RD UK
| | - Declan Meehan
- School of Chemistry, University of Nottingham, University Park Nottingham NG7 2RD UK
| | - Rhys C Griffiths
- School of Chemistry, University of Nottingham, University Park Nottingham NG7 2RD UK
| | - Harriet J Knowles
- School of Chemistry, University of Nottingham, University Park Nottingham NG7 2RD UK
| | - Peiyu Zhang
- School of Chemistry, University of Leeds Woodhouse Lane Leeds LS2 9JT UK
| | - Huw E L Williams
- Biodiscovery Institute, University of Nottingham, University Park Nottingham NG7 2RD UK
| | - Andrew J Wilson
- School of Chemistry, University of Leeds Woodhouse Lane Leeds LS2 9JT UK
- School of Chemistry, University of Birmingham Edgbaston Birmingham B15 2TT UK
| | - Nicholas J Mitchell
- School of Chemistry, University of Nottingham, University Park Nottingham NG7 2RD UK
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6
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Xuan GR, Chen XK, Liu MC, Zhou YB, Wu HY. Deselenylative Acylation and Nitration of Monoselenides. Org Lett 2024. [PMID: 38814147 DOI: 10.1021/acs.orglett.4c01537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2024]
Abstract
A deselenylative protocol that enables the construction of the C-C and C-N bonds has been disclosed. By using acyl chloride/AgOTf as an efficient acylation reagent, diarylselenides smoothly undergo deselenylative acylation to produce a series of aroyl compounds. In addition, deselenylative nitration can be enabled by a mild nitration reagent consisting of TsCl and AgNO3, furnishing a diverse array of nitroaromatic compounds.
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Affiliation(s)
- Guo-Rong Xuan
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Xin-Kai Chen
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Miao-Chang Liu
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Yun-Bing Zhou
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
- Key Lab of Biohealth Materials and Chemistry of Wenzhou, Wenzhou 325035, China
| | - Hua-Yue Wu
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
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7
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Ortalli S, Ford J, Trabanco AA, Tredwell M, Gouverneur V. Photoredox Nucleophilic (Radio)fluorination of Alkoxyamines. J Am Chem Soc 2024; 146:11599-11604. [PMID: 38651661 PMCID: PMC11066844 DOI: 10.1021/jacs.4c02474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 04/19/2024] [Accepted: 04/19/2024] [Indexed: 04/25/2024]
Abstract
Herein, we report a photoredox nucleophilic (radio)fluorination using TEMPO-derived alkoxyamines, a class of substrates accessible in a single step from a diversity of readily available carboxylic acids, halides, alkenes, alcohols, aldehydes, boron reagents, and C-H bonds. This mild and versatile one-electron pathway affords radiolabeled aliphatic fluorides that are typically inaccessible applying conventional nucleophilic substitution technologies due to insufficient reactivity and competitive elimination. Automation of this photoredox process is also demonstrated with a user-friendly and commercially available photoredox flow reactor and radiosynthetic platform, therefore expediting access to labeled aliphatic fluorides in high molar activity (Am) for (pre)clinical evaluation.
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Affiliation(s)
- Sebastiano Ortalli
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Joseph Ford
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Andrés A. Trabanco
- Global
Discovery Chemistry, Therapeutics Discovery, Johnson & Johnson Innovative Medicine, Janssen-Cilag, S.A., E-45007 Toledo, Spain
| | - Matthew Tredwell
- Wales Research
and Diagnostic PET Imaging Centre, Cardiff
University, University
Hospital of Wales, Heath Park, Cardiff CF14 4XN, United
Kingdom
- School
of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, United Kingdom
| | - Véronique Gouverneur
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, United Kingdom
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8
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Wan C, Yang D, Song C, Liang M, An Y, Lian C, Dai C, Ye Y, Yin F, Wang R, Li Z. A pyridinium-based strategy for lysine-selective protein modification and chemoproteomic profiling in live cells. Chem Sci 2024; 15:5340-5348. [PMID: 38577373 PMCID: PMC10988577 DOI: 10.1039/d3sc05766f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 03/08/2024] [Indexed: 04/06/2024] Open
Abstract
Protein active states are dynamically regulated by various modifications; thus, endogenous protein modification is an important tool for understanding protein functions and networks in complicated biological systems. Here we developed a new pyridinium-based approach to label lysine residues under physiological conditions that is low-toxicity, efficient, and lysine-selective. Furthermore, we performed a large-scale analysis of the ∼70% lysine-selective proteome in MCF-7 cells using activity-based protein profiling (ABPP). We quantifically assessed 1216 lysine-labeled peptides in cell lysates and identified 386 modified lysine sites including 43 mitochondrial-localized proteins in live MCF-7 cells. Labeled proteins significantly preferred the mitochondria. This pyridinium-based methodology demonstrates the importance of analyzing endogenous proteins under native conditions and provides a robust chemical strategy utilizing either lysine-selective protein labeling or spatiotemporal profiling in a living system.
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Affiliation(s)
- Chuan Wan
- College of Health Science and Environmental Engineering, Shenzhen Technology University Shenzhen 518118 P. R. China
| | - Dongyan Yang
- College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering Guangzhou 510225 P. R. China
| | - Chunli Song
- Pingshan Translational Medicine Center, Shenzhen Bay Laboratory Shenzhen 518118 P. R. China
| | - Mingchan Liang
- Pingshan Translational Medicine Center, Shenzhen Bay Laboratory Shenzhen 518118 P. R. China
| | - Yuhao An
- Pingshan Translational Medicine Center, Shenzhen Bay Laboratory Shenzhen 518118 P. R. China
| | - Chenshan Lian
- Pingshan Translational Medicine Center, Shenzhen Bay Laboratory Shenzhen 518118 P. R. China
| | - Chuan Dai
- Pingshan Translational Medicine Center, Shenzhen Bay Laboratory Shenzhen 518118 P. R. China
| | - Yuxin Ye
- Pingshan Translational Medicine Center, Shenzhen Bay Laboratory Shenzhen 518118 P. R. China
| | - Feng Yin
- Pingshan Translational Medicine Center, Shenzhen Bay Laboratory Shenzhen 518118 P. R. China
| | - Rui Wang
- Pingshan Translational Medicine Center, Shenzhen Bay Laboratory Shenzhen 518118 P. R. China
| | - Zigang Li
- State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School Shenzhen 518055 P. R. China
- Pingshan Translational Medicine Center, Shenzhen Bay Laboratory Shenzhen 518118 P. R. China
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9
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Zhao Z, Laps S, Gichtin JS, Metanis N. Selenium chemistry for spatio-selective peptide and protein functionalization. Nat Rev Chem 2024; 8:211-229. [PMID: 38388838 DOI: 10.1038/s41570-024-00579-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/15/2024] [Indexed: 02/24/2024]
Abstract
The ability to construct a peptide or protein in a spatio-specific manner is of great interest for therapeutic and biochemical research. However, the various functional groups present in peptide sequences and the need to perform chemistry under mild and aqueous conditions make selective protein functionalization one of the greatest synthetic challenges. The fascinating paradox of selenium (Se) - being found in both toxic compounds and also harnessed by nature for essential biochemical processes - has inspired the recent exploration of selenium chemistry for site-selective functionalization of peptides and proteins. In this Review, we discuss such approaches, including metal-free and metal-catalysed transformations, as well as traceless chemical modifications. We report their advantages, limitations and applications, as well as future research avenues.
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Affiliation(s)
- Zhenguang Zhao
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, USA
| | - Shay Laps
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Jacob S Gichtin
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Norman Metanis
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel.
- Casali Center for Applied Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel.
- The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, Israel.
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10
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Xiong Y, Zhang Q, Zhang J, Wu X. Visible-Light-Driven Deoxygenative Heteroarylation of Alcohols with Heteroaryl Sulfones. J Org Chem 2024; 89:3629-3634. [PMID: 38364202 DOI: 10.1021/acs.joc.3c02733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2024]
Abstract
The visible-light-promoted deoxygenative radical heteroarylation of alcohols was achieved in the absence of any external photosensitizers. The processes occur through the generation of xanthate salts from alcohols, followed by SET and fragmentation, delivering alkyl radicals to react with heteroaryl sulfones. This method is amenable for a wide range of alcohols with good functional group tolerance, providing a practical strategy for the alkylation of benzo-heteroaromatics. Mechanism studies indicate that direct visible-light excitation of xanthate anions and subsequent SET initiate the reactions.
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Affiliation(s)
- Yanjiao Xiong
- Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, P. R. China
| | - Qi Zhang
- Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, P. R. China
| | - Jun Zhang
- Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, P. R. China
| | - Xuesong Wu
- Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, P. R. China
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11
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Kuzmin J, Röckl J, Schwarz N, Djossou J, Ahumada G, Ahlquist M, Lundberg H. Electroreductive Desulfurative Transformations with Thioethers as Alkyl Radical Precursors. Angew Chem Int Ed Engl 2023; 62:e202304272. [PMID: 37342889 DOI: 10.1002/anie.202304272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 05/29/2023] [Accepted: 06/21/2023] [Indexed: 06/23/2023]
Abstract
Thioethers are highly prevalent functional groups in organic compounds of natural and synthetic origin but remain remarkably underexplored as starting materials in desulfurative transformations. As such, new synthetic methods are highly desirable to unlock the potential of the compound class. In this vein, electrochemistry is an ideal tool to enable new reactivity and selectivity under mild conditions. Herein, we demonstrate the efficient use of aryl alkyl thioethers as alkyl radical precursors in electroreductive transformations, along with mechanistic details. The transformations proceed with complete selectivity for C(sp3 )-S bond cleavage, orthogonal to that of established transition metal-catalyzed two-electron routes. We showcase a hydrodesulfurization protocol with broad functional group tolerance, the first example of desulfurative C(sp3 )-C(sp3 ) bond formation in Giese-type cross-coupling and the first protocol for electrocarboxylation of synthetic relevance with thioethers as starting materials. Finally, the compound class is shown to outcompete their well-established sulfone analogues as alkyl radical precursors, demonstrating their synthetic potential for future desulfurative transformations in a one-electron manifold.
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Affiliation(s)
- Julius Kuzmin
- Department of Chemistry, KTH Royal Institute of Technology, 10044, Stockholm, Sweden
| | - Johannes Röckl
- Department of Chemistry, KTH Royal Institute of Technology, 10044, Stockholm, Sweden
| | - Nils Schwarz
- Department of Chemistry, KTH Royal Institute of Technology, 10044, Stockholm, Sweden
| | - Jonas Djossou
- Department of Chemistry, KTH Royal Institute of Technology, 10044, Stockholm, Sweden
| | - Guillermo Ahumada
- Department of Chemistry, KTH Royal Institute of Technology, 10044, Stockholm, Sweden
| | - Mårten Ahlquist
- Department of Chemistry, KTH Royal Institute of Technology, 10044, Stockholm, Sweden
| | - Helena Lundberg
- Department of Chemistry, KTH Royal Institute of Technology, 10044, Stockholm, Sweden
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12
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Chen X, Josephson B, Davis BG. Carbon-Centered Radicals in Protein Manipulation. ACS CENTRAL SCIENCE 2023; 9:614-638. [PMID: 37122447 PMCID: PMC10141601 DOI: 10.1021/acscentsci.3c00051] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Indexed: 05/03/2023]
Abstract
Methods to directly post-translationally modify proteins are perhaps the most straightforward and operationally simple ways to create and study protein post-translational modifications (PTMs). However, precisely altering or constructing the C-C scaffolds pervasive throughout biology is difficult with common two-electron chemical approaches. Recently, there has been a surge of new methods that have utilized single electron/radical chemistry applied to site-specifically "edit" proteins that have started to create this potential-one that in principle could be near free-ranging. This review provides an overview of current methods that install such "edits", including those that generate function and/or PTMs, through radical C-C bond formation (as well as C-X bond formation via C• where illustrative). These exploit selectivity for either native residues, or preinstalled noncanonical protein side-chains with superior radical generating or accepting abilities. Particular focus will be on the radical generation approach (on-protein or off-protein, use of light and photocatalysts), judging the compatibility of conditions with proteins and cells, and novel chemical biology applications afforded by these methods. While there are still many technical hurdles, radical C-C bond formation on proteins is a promising and rapidly growing area in chemical biology with long-term potential for biological editing.
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Affiliation(s)
- Xuanxiao Chen
- Department
of Chemistry, University of Oxford, Oxford, OX1 3TA, U.K.
- The
Rosalind Franklin Institute, Oxfordshire, OX11 OFA, U.K.
| | - Brian Josephson
- Department
of Chemistry, University of Oxford, Oxford, OX1 3TA, U.K.
| | - Benjamin G. Davis
- Department
of Chemistry, University of Oxford, Oxford, OX1 3TA, U.K.
- The
Rosalind Franklin Institute, Oxfordshire, OX11 OFA, U.K.
- Department
of Pharmacology, University of Oxford, Oxford, OX1 3QT, U.K.
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13
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Hammond JM, Gardiner MG, Malins LR. Amino Acid Sulfinate Salts as Alkyl Radical Precursors. Org Lett 2023; 25:3157-3162. [PMID: 37093619 DOI: 10.1021/acs.orglett.3c01112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2023]
Abstract
A general approach to the synthesis of amino acid sulfinate salts from commercially available α-chiral hydroxylated amino acids is reported. These reagents are shown to be valuable precursors to alkyl radicals under mild photochemical oxidation conditions. The photochemically generated amino acid radicals engage readily with alkyl and aryl disulfide radical traps to afford a diverse suite of modified amino acids.
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Affiliation(s)
- Joshua M Hammond
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| | - Michael G Gardiner
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| | - Lara R Malins
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
- Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, Australian National University, Canberra, ACT 2601, Australia
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14
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Ono S, Koga M, Arimura Y, Hatakeyama T, Kobayashi M, Sagara JI, Nakai T, Horino Y, Kuroda H, Oyama H, Arima K. Site-Selective Incorporation of a Functional Group into Lys175 in the Vicinity of the Active Site of Chymotrypsin by Using Peptidyl α-Aminoalkylphosphonate Diphenyl Ester-Derivatives. Molecules 2023; 28:molecules28073150. [PMID: 37049913 PMCID: PMC10096113 DOI: 10.3390/molecules28073150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Revised: 03/27/2023] [Accepted: 03/27/2023] [Indexed: 04/05/2023] Open
Abstract
We previously reported that Lys175 in the region of the active site of chymotrypsin (Csin) could be site-selectively modified by using an N-hydroxy succinimide (NHS) ester of the peptidyl derivative containing 1-amino-2-ethylphenylphosphonate diphenyl ester [NHS-Suc-Ala-Ala-PheP(OPh)2]. In this study, the Lys175-selective modification method was expanded to incorporate functional groups into Lys 175 in Csin. Two types of peptidyl phosphonate derivatives with the dansyl group (Dan) as a functional molecule, Dan-β-Ala-[Asp(NHS) or Glu(NHS)]-Ala-Ala-(R)-PheP(OPh)2 (DanD and DanE, respectively), were synthesized, and their action was evaluated when modifying Lys175 in Csin. Ion-exchange chromatography (IEC), fluorescence spectroscopy, and LC-MS/MS were used to analyze the products from the reaction of Csin with DanD or DanE. By IEC and LC-MS/MS, the results showed that DanE reacted with Csin more effectively than DanD to produce the modified Csin (DanMCsin) bearing Dan at Lys175. DanMCsin exhibited an enzymatic activity corresponding to 1/120 of Csin against Suc-Ala-Ala-Phe-pNA. In addition, an effect of Lys175 modification on the access of the proteinaceous Bowman–Birk inhibitor to the active site of DanMCsin was investigated. In conclusion, by using a peptidyl derivative containing 1-amino-2-ethylphenylphosphonate diphenyl ester, we demonstrated that a functional group could be incorporated into Lys175 in Csin.
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Affiliation(s)
- Shin Ono
- Applied Chemistry, Kanazawa Institute of Technology, Hakusan 924-0838, Ishikawa, Japan
| | - Masato Koga
- Applied Chemistry, Kanazawa Institute of Technology, Hakusan 924-0838, Ishikawa, Japan
| | - Yuya Arimura
- Applied Chemistry, Kanazawa Institute of Technology, Hakusan 924-0838, Ishikawa, Japan
| | - Takahiro Hatakeyama
- Applied Chemistry, Kanazawa Institute of Technology, Hakusan 924-0838, Ishikawa, Japan
| | - Mai Kobayashi
- Applied Chemistry, Kanazawa Institute of Technology, Hakusan 924-0838, Ishikawa, Japan
| | - Jun-ichi Sagara
- Applied Bioengineering, Kanazawa Institute of Technology, Hakusan 924-0838, Ishikawa, Japan
| | - Takahiko Nakai
- Graduate School of Science and Engineering, University of Toyama, Toyama 930-8555, Toyama, Japan
| | - Yoshikazu Horino
- Department of Applied Chemistry and Bioscience, Chitose Institute of Science and Technology, Chitose 066-8655, Hokkaido, Japan
| | - Hirofumi Kuroda
- Department of General Education, National Institute of Technology, Ishikawa College, Tsubata 929-0392, Ishikawa, Japan
| | - Hiroshi Oyama
- Faculty of Science and Engineering, Setsunan University, Hirakata 572-8508, Osaka, Japan
| | - Kazunari Arima
- Graduate School of Science and Engineering, Kagoshima University, Kagoshima 890-0065, Kagoshima, Japan
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15
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Fu XP, Yuan Y, Jha A, Levin N, Giltrap AM, Ren J, Mamalis D, Mohammed S, Davis BG. Stereoretentive Post-Translational Protein Editing. ACS CENTRAL SCIENCE 2023; 9:405-416. [PMID: 36968537 PMCID: PMC10037454 DOI: 10.1021/acscentsci.2c00991] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Indexed: 05/16/2023]
Abstract
Chemical post-translational methods allow convergent side-chain editing of proteins without needing to resort to genetic intervention. Current approaches that allow the creation of constitutionally native side chains via C-C bond formation, using off-protein carbon-centered C· radicals added to unnatural amino acid radical acceptor (SOMOphile, singly occupied molecular orbital (SOMO)) "tags" such as dehydroalanine, are benign and wide-ranging. However, they also typically create epimeric mixtures of d/l-residues. Here, we describe a light-mediated desulfurative method that, through the creation and reaction of stereoretained on-proteinl-alanyl Cβ· radicals, allows Cβ-Hγ, Cβ-Oγ, Cβ-Seγ, Cβ-Bγ, and Cβ-Cγ bond formation to flexibly generate site-selectively edited proteins with full retention of native stereochemistry under mild conditions from a natural amino acid precursor. This methodology shows great potential to explore protein side-chain diversity and function and in the construction of useful bioconjugates.
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Affiliation(s)
- Xia-Ping Fu
- Rosalind
Franklin Institute, Harwell, Oxfordshire OX11 0QX, United Kingdom
- Department
of Pharmacology, University of Oxford, Oxford OX1 3QT, United Kingdom
| | - Yizhi Yuan
- Rosalind
Franklin Institute, Harwell, Oxfordshire OX11 0QX, United Kingdom
- Department
of Pharmacology, University of Oxford, Oxford OX1 3QT, United Kingdom
| | - Ajay Jha
- Rosalind
Franklin Institute, Harwell, Oxfordshire OX11 0QX, United Kingdom
- Department
of Pharmacology, University of Oxford, Oxford OX1 3QT, United Kingdom
| | - Nikita Levin
- Rosalind
Franklin Institute, Harwell, Oxfordshire OX11 0QX, United Kingdom
| | - Andrew M. Giltrap
- Rosalind
Franklin Institute, Harwell, Oxfordshire OX11 0QX, United Kingdom
- Department
of Pharmacology, University of Oxford, Oxford OX1 3QT, United Kingdom
| | - Jack Ren
- Rosalind
Franklin Institute, Harwell, Oxfordshire OX11 0QX, United Kingdom
- Department
of Chemistry, University of Oxford, Oxford OX1 3TA, United Kingdom
| | - Dimitrios Mamalis
- Rosalind
Franklin Institute, Harwell, Oxfordshire OX11 0QX, United Kingdom
- Department
of Chemistry, University of Oxford, Oxford OX1 3TA, United Kingdom
| | - Shabaz Mohammed
- Rosalind
Franklin Institute, Harwell, Oxfordshire OX11 0QX, United Kingdom
- Department
of Chemistry, University of Oxford, Oxford OX1 3TA, United Kingdom
| | - Benjamin G. Davis
- Rosalind
Franklin Institute, Harwell, Oxfordshire OX11 0QX, United Kingdom
- Department
of Pharmacology, University of Oxford, Oxford OX1 3QT, United Kingdom
- Department
of Chemistry, University of Oxford, Oxford OX1 3TA, United Kingdom
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16
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Griffiths RC, Smith FR, Li D, Wyatt J, Rogers DM, Long JE, Cusin LML, Tighe PJ, Layfield R, Hirst JD, Müller MM, Mitchell NJ. Cysteine-Selective Modification of Peptides and Proteins via Desulfurative C-C Bond Formation. Chemistry 2023; 29:e202202503. [PMID: 36534955 PMCID: PMC10946470 DOI: 10.1002/chem.202202503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 12/07/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022]
Abstract
The site-selective modification of peptides and proteins facilitates the preparation of targeted therapeutic agents and tools to interrogate biochemical pathways. Among the numerous bioconjugation techniques developed to install groups of interest, those that generate C(sp3 )-C(sp3 ) bonds are significantly underrepresented despite affording proteolytically stable, biogenic linkages. Herein, a visible-light-mediated reaction is described that enables the site-selective modification of peptides and proteins via desulfurative C(sp3 )-C(sp3 ) bond formation. The reaction is rapid and high yielding in peptide systems, with comparable translation to proteins. Using this chemistry, a range of moieties is installed into model systems and an effective PTM-mimic is successfully integrated into a recombinantly expressed histone.
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Affiliation(s)
- Rhys C. Griffiths
- School of ChemistryUniversity of NottinghamUniversity ParkNottinghamNG7 2RDUK
| | - Frances R. Smith
- School of ChemistryUniversity of NottinghamUniversity ParkNottinghamNG7 2RDUK
| | - Diyuan Li
- School of ChemistryUniversity of NottinghamUniversity ParkNottinghamNG7 2RDUK
| | - Jasmine Wyatt
- Department of ChemistryKing's College LondonLondonSE1 1DB
| | - David M. Rogers
- School of ChemistryUniversity of NottinghamUniversity ParkNottinghamNG7 2RDUK
| | - Jed E. Long
- School of Life SciencesUniversity of Nottingham Medical SchoolNottinghamNG7 2UHUK
| | - Lola M. L. Cusin
- School of Life SciencesUniversity of NottinghamUniversity ParkNottinghamNG7 2RDUK
| | - Patrick J. Tighe
- School of Life SciencesUniversity of NottinghamUniversity ParkNottinghamNG7 2RDUK
| | - Robert Layfield
- School of Life SciencesUniversity of Nottingham Medical SchoolNottinghamNG7 2UHUK
| | - Jonathan D. Hirst
- School of ChemistryUniversity of NottinghamUniversity ParkNottinghamNG7 2RDUK
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17
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Fischer NH, Oliveira MT, Diness F. Chemical modification of proteins - challenges and trends at the start of the 2020s. Biomater Sci 2023; 11:719-748. [PMID: 36519403 DOI: 10.1039/d2bm01237e] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ribosomally expressed proteins perform multiple, versatile, and specialized tasks throughout Nature. In modern times, chemically modified proteins, including improved hormones, enzymes, and antibody-drug-conjugates have become available and have found advanced industrial and pharmaceutical applications. Chemical modification of proteins is used to introduce new functionalities, improve stability or drugability. Undertaking chemical reactions with proteins without compromising their native function is still a core challenge as proteins are large conformation dependent multifunctional molecules. Methods for functionalization ideally should be chemo-selective, site-selective, and undertaken under biocompatible conditions in aqueous buffer to prevent denaturation of the protein. Here the present challenges in the field are discussed and methods for modification of the 20 encoded amino acids as well as the N-/C-termini and protein backbone are presented. For each amino acid, common and traditional modification methods are presented first, followed by more recent ones.
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Affiliation(s)
- Niklas Henrik Fischer
- Department of Science and Environment, Roskilde University, Universitetsvej 1, DK-4000 Roskilde, Denmark. .,Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark
| | - Maria Teresa Oliveira
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark
| | - Frederik Diness
- Department of Science and Environment, Roskilde University, Universitetsvej 1, DK-4000 Roskilde, Denmark. .,Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark
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18
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Rehpenn A, Walter A, Storch G. Molecular flavin catalysts for C-H functionalisation and derivatisation of dehydroamino acids. Chem Sci 2022; 13:14151-14156. [PMID: 36540823 PMCID: PMC9728571 DOI: 10.1039/d2sc04341f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 11/04/2022] [Indexed: 03/12/2024] Open
Abstract
In nature, the isoalloxazine heterocycle of flavin cofactors undergoes reversible covalent bond formation with a variety of different reaction partners. These intermediates play a crucial role inter alia as the signalling states and in selective catalysis reactions. In the organic laboratory, covalent adducts with a new carbon-carbon bond have been observed with photochemically excited flavins but have, so far, only been regarded as dead-end side products. We have identified a series of molecular flavins that form adducts resulting in a new C-C bond at the C4a-position through allylic C-H activation and dehydroamino acid oxidation. Typically, these reactions are of radical nature and a stepwise pathway is assumed. We could demonstrate that these adducts are no dead-end and that the labile C-C bond can be cleaved by adding the persistent radical TEMPO leading to flavin regeneration and alkoxyamine-functionalised substrates. Our method allows for the catalytic oxidation of dehydroamino acids (16 examples) and we show that the acylimine products serve as versatile starting points for diversification. The present results are envisioned to stimulate the design of further catalytic reactions involving intermediates at the flavin C4a-position and their reactivity towards metal complexes or other persistent organic radicals. Our method for dehydrobutyrine derivatisation is orthogonal to the currently used methods (i.e., nucleophilic attack or radical addition) and offers new perspectives for peptide natural product diversification.
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Affiliation(s)
- Andreas Rehpenn
- School of Natural Sciences and Catalysis Research Center (CRC), Technical University of Munich (TUM) Lichtenbergstr. 4 85747 Garching Germany
| | - Alexandra Walter
- School of Natural Sciences and Catalysis Research Center (CRC), Technical University of Munich (TUM) Lichtenbergstr. 4 85747 Garching Germany
| | - Golo Storch
- School of Natural Sciences and Catalysis Research Center (CRC), Technical University of Munich (TUM) Lichtenbergstr. 4 85747 Garching Germany
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19
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Wan C, Yang D, Qin X, Xue Z, Guo X, Hou Z, Jiang C, Yin F, Wang R, Li Z. Flavin catalyzed desulfurization of peptides and proteins in aqueous media. Org Biomol Chem 2022; 20:4105-4109. [PMID: 35546316 DOI: 10.1039/d2ob00641c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A biomimetic method has been established for the chemo-selective desulfurization of cysteinyl peptides and proteins in aqueous media. The derivatives of biocatalytic cofactors, flavins, were found to be efficient photosensitizers in a thiyl-radical-mediated desulfurization of Cys. The reaction was conducted in an ultrafast manner with both polypeptides and proteins.
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Affiliation(s)
- Chuan Wan
- State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, 518055, P. R. China.
| | - Dongyan Yang
- College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Xuan Qin
- State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, 518055, P. R. China.
| | - Ziyi Xue
- College of chemistry & chemical engineering, Lanzhou University, Lanzhou, 730000, China
| | - Xiaochun Guo
- State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, 518055, P. R. China.
| | - Zhanfeng Hou
- State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, 518055, P. R. China.
| | - Chenran Jiang
- Pingshan translational medicine center, Shenzhen Bay Laboratory, Shenzhen, 518118, China.
| | - Feng Yin
- Pingshan translational medicine center, Shenzhen Bay Laboratory, Shenzhen, 518118, China.
| | - Rui Wang
- Pingshan translational medicine center, Shenzhen Bay Laboratory, Shenzhen, 518118, China.
| | - Zigang Li
- State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, 518055, P. R. China. .,Pingshan translational medicine center, Shenzhen Bay Laboratory, Shenzhen, 518118, China.
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20
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Guo HM, He BQ, Wu X. Direct Photoexcitation of Xanthate Anions for Deoxygenative Alkenylation of Alcohols. Org Lett 2022; 24:3199-3204. [PMID: 35467887 DOI: 10.1021/acs.orglett.2c00889] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
In this report, we identify xanthate salts as a unique class of visible-light-excitable alkyl radical precursors that act simultaneously as strong photoreductants and alkyl radical sources. Upon direct photoexcitation of xanthate anions, efficient deoxygenative alkenylation and alkylation of a wide range of primary, secondary, and tertiary alcohols have been achieved via a one-pot protocol, avoiding any photocatalysts. This method exhibits a broad substrate scope and good functional group tolerance, enabling late-stage functionalization of complex molecules.
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Affiliation(s)
- Hong-Mei Guo
- Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Bin-Qing He
- Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Xuesong Wu
- Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
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21
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Griffiths RC, Smith FR, Long JE, Scott D, Williams HEL, Oldham NJ, Layfield R, Mitchell NJ. Site-Selective Installation of N ϵ -Modified Sidechains into Peptide and Protein Scaffolds via Visible-Light-Mediated Desulfurative C-C Bond Formation. Angew Chem Int Ed Engl 2022; 61:e202110223. [PMID: 34713958 PMCID: PMC9299887 DOI: 10.1002/anie.202110223] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 10/13/2021] [Indexed: 01/07/2023]
Abstract
Post-translational modifications (PTMs) enhance the repertoire of protein function and mediate or influence the activity of many cellular processes. The preparation of site-specifically and homogeneously modified proteins, to apply as tools to understand the biological role of PTMs, is a challenging task. Herein, we describe a visible-light-mediated desulfurative C(sp3 )-C(sp3 ) bond forming reaction that enables the site-selective installation of Nϵ -modified sidechains into peptides and proteins of interest. Rapid, operationally simple, and tolerant to ambient atmosphere, we demonstrate the installation of a range of lysine (Lys) PTMs into model peptide systems and showcase the potential of this technology by site-selectively installing an Nϵ Ac sidechain into recombinantly expressed ubiquitin (Ub).
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Affiliation(s)
- Rhys C. Griffiths
- School of ChemistryUniversity of NottinghamUniversity ParkNottinghamNG7 2RDUK
| | - Frances R. Smith
- School of ChemistryUniversity of NottinghamUniversity ParkNottinghamNG7 2RDUK
| | - Jed E. Long
- Biodiscovery InstituteUniversity of NottinghamUniversity ParkNottinghamNG7 2RDUK
| | - Daniel Scott
- School of Life Sciences, Queen's Medical CentreUniversity of NottinghamNottinghamNG7 2UHUK
| | - Huw E. L. Williams
- Biodiscovery InstituteUniversity of NottinghamUniversity ParkNottinghamNG7 2RDUK
| | - Neil J. Oldham
- School of ChemistryUniversity of NottinghamUniversity ParkNottinghamNG7 2RDUK
| | - Robert Layfield
- School of Life Sciences, Queen's Medical CentreUniversity of NottinghamNottinghamNG7 2UHUK
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22
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Griffiths RC, Smith FR, Long JE, Scott D, Williams HEL, Oldham NJ, Layfield R, Mitchell NJ. Site‐Selective Installation of N
ϵ
‐Modified Sidechains into Peptide and Protein Scaffolds via Visible‐Light‐Mediated Desulfurative C–C Bond Formation. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202110223] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Rhys C. Griffiths
- School of Chemistry University of Nottingham University Park Nottingham NG7 2RD UK
| | - Frances R. Smith
- School of Chemistry University of Nottingham University Park Nottingham NG7 2RD UK
| | - Jed E. Long
- Biodiscovery Institute University of Nottingham University Park Nottingham NG7 2RD UK
| | - Daniel Scott
- School of Life Sciences, Queen's Medical Centre University of Nottingham Nottingham NG7 2UH UK
| | - Huw E. L. Williams
- Biodiscovery Institute University of Nottingham University Park Nottingham NG7 2RD UK
| | - Neil J. Oldham
- School of Chemistry University of Nottingham University Park Nottingham NG7 2RD UK
| | - Robert Layfield
- School of Life Sciences, Queen's Medical Centre University of Nottingham Nottingham NG7 2UH UK
| | - Nicholas J. Mitchell
- School of Chemistry University of Nottingham University Park Nottingham NG7 2RD UK
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23
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Zhao Z, Shimon D, Metanis N. Chemoselective Copper-Mediated Modification of Selenocysteines in Peptides and Proteins. J Am Chem Soc 2021; 143:12817-12824. [PMID: 34346673 DOI: 10.1021/jacs.1c06101] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Highly valuable bioconjugated molecules must be synthesized through efficient, chemoselective chemical modifications of peptides and proteins. Herein, we report the chemoselective modification of peptides and proteins via a reaction between selenocysteine residues and aryl/alkyl radicals. In situ radical generation from hydrazine substrates and copper ions proceeds rapidly in an aqueous buffer at near neutral pH (5-8), providing a variety of Se-modified linear and cyclic peptides and proteins conjugated to aryl and alkyl molecules, and to affinity label tag (biotin). This chemistry opens a new avenue for chemical protein modifications.
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Affiliation(s)
- Zhenguang Zhao
- Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra, Givat Ram, Jerusalem 91904, Israel
| | - Daphna Shimon
- Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra, Givat Ram, Jerusalem 91904, Israel
| | - Norman Metanis
- Institute of Chemistry, The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Edmond J. Safra, Givat Ram, Jerusalem 9190401, Israel
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24
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Gurská M, Brezová V, Šalitroš I, Švorc Ľ, Špánik I, Moncoľ J, Pavlik J, Szolcsányi P. Polyradical PROXYL/TEMPO Conjugates Connected by Ester/Amide Bridges: Synthesis, Physicochemical Studies, and DFT Calculations. Chempluschem 2021; 86:396-405. [PMID: 33645915 DOI: 10.1002/cplu.202000803] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 02/11/2021] [Indexed: 12/16/2022]
Abstract
A series of di-/trinitroxide esters and amides featuring PROXYL and/or TEMPO radicals connected with alicyclic bridges were prepared in 61-92 % yields and their properties were analysed by using multiple experimental techniques. The examination of EPR spectra of radicals in organic solvents augmented with DFT calculations brought valuable information on the conformational dynamics and spin exchange mechanisms. Cyclic voltammetry investigations revealed (quasi)reversible electrochemical behaviour of studied nitroxides with their half-wave potentials ranging from -51 to -17 mV. SQUID measurements of selected radicals revealed that the magnetism of di- and trinitroxides is significantly different, since antiferromagnetic coupling in biradicals is notably larger than in triradicals. The single-crystal X-ray analysis of selected biradicals revealed the existence of 3D supramolecular networks of molecules linked through hydrogen-bonding interactions. These polynitroxide radicals can serve as promising bridging or chelating ligands in the synthesis of transition-metal-based molecular magnets.
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Affiliation(s)
- Mária Gurská
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovak Republic.,Polymer Institute, Slovak Academy of Sciences, Dúbravská cesta 9, SK-845 41, Bratislava, Slovak Republic
| | - Vlasta Brezová
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovak Republic
| | - Ivan Šalitroš
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovak Republic.,Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, 771 46, Olomouc, Czech Republic.,Central European Institute of Technology, Brno University of Technology, Purkyňova 123, 61200, Brno, Czech Republic
| | - Ľubomír Švorc
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovak Republic.,Department of Chemistry, Faculty of Natural Sciences, Matej Bel University, Tajovského 40, SK-974 00, Banská Bystrica, Slovak Republic
| | - Ivan Špánik
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovak Republic
| | - Ján Moncoľ
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovak Republic
| | - Ján Pavlik
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovak Republic
| | - Peter Szolcsányi
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovak Republic
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25
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Griffiths RC, Smith FR, Long JE, Williams HEL, Layfield R, Mitchell NJ. Site-Selective Modification of Peptides and Proteins via Interception of Free-Radical-Mediated Dechalcogenation. Angew Chem Int Ed Engl 2020; 59:23659-23667. [PMID: 32893423 PMCID: PMC7756370 DOI: 10.1002/anie.202006260] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 08/15/2020] [Indexed: 11/25/2022]
Abstract
The development of site‐selective chemistry targeting the canonical amino acids enables the controlled installation of desired functionalities into native peptides and proteins. Such techniques facilitate the development of polypeptide conjugates to advance therapeutics, diagnostics, and fundamental science. We report a versatile and selective method to functionalize peptides and proteins through free‐radical‐mediated dechalcogenation. By exploiting phosphine‐induced homolysis of the C−Se and C−S bonds of selenocysteine and cysteine, respectively, we demonstrate the site‐selective installation of groups appended to a persistent radical trap. The reaction is rapid, operationally simple, and chemoselective. The resulting aminooxy linker is stable under a variety of conditions and selectively cleavable in the presence of a low‐oxidation‐state transition metal. We have explored the full scope of this reaction using complex peptide systems and a recombinantly expressed protein.
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Affiliation(s)
- Rhys C Griffiths
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Frances R Smith
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Jed E Long
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Huw E L Williams
- Biodiscovery Institute, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Robert Layfield
- School of Life Sciences, University of Nottingham, University Park, Nottingham, NG7 2UH, UK
| | - Nicholas J Mitchell
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
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