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Saintomé C, Monfret O, Doisneau G, Guianvarc'h D. Oligonucleotide-Based Photoaffinity Probes: Chemical Tools and Applications for Protein Labeling. Chembiochem 2024; 25:e202400097. [PMID: 38703401 DOI: 10.1002/cbic.202400097] [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: 01/31/2024] [Revised: 04/30/2024] [Accepted: 05/03/2024] [Indexed: 05/06/2024]
Abstract
A variety of proteins interact with DNA and RNA, including polymerases, histones, ribosomes, transcription factors, and repair enzymes. However, the transient non-covalent nature of these interactions poses challenges for analysis. Introducing a covalent bond between proteins and DNA via photochemical activation of a photosensitive functional group introduced onto nucleic acids offers a means to stabilize these often weak interactions without significantly altering the binding interface. Consequently, photoactivatable oligonucleotides are powerful tools for investigating nucleic acid-protein interactions involved in numerous biological and pathological processes. In this review, we provide a comprehensive overview of the chemical tools developed so far and the different strategies used for incorporating the most commonly used photoreactive reagents into oligonucleotide probes or nucleic acids. Furthermore, we illustrate their application with several examples including protein binding site mapping, identification of protein binding partners, and in cell studies.
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Affiliation(s)
- Carole Saintomé
- Sorbonne Université, UFR 927, MNHN CNRS UMR 7196, INSERM U1154, 43 rue Cuvier, 75005, Paris, France
| | - Océane Monfret
- Université Paris-Saclay, CNRS, Institut de Chimie Moléculaire et des Matériaux d'Orsay, UMR CNRS 8182, 91405, Orsay, France
| | - Gilles Doisneau
- Université Paris-Saclay, CNRS, Institut de Chimie Moléculaire et des Matériaux d'Orsay, UMR CNRS 8182, 91405, Orsay, France
| | - Dominique Guianvarc'h
- Université Paris-Saclay, CNRS, Institut de Chimie Moléculaire et des Matériaux d'Orsay, UMR CNRS 8182, 91405, Orsay, France
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2
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Bousch C, Vreulz B, Kansal K, El-Husseini A, Cecioni S. Fluorogenic Photo-Crosslinking of Glycan-Binding Protein Recognition Using a Fluorinated Azido-Coumarin Fucoside. Angew Chem Int Ed Engl 2023; 62:e202314248. [PMID: 37847865 DOI: 10.1002/anie.202314248] [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: 09/22/2023] [Revised: 10/02/2023] [Accepted: 10/17/2023] [Indexed: 10/19/2023]
Abstract
Glycan recognition by glycan-binding proteins is central to the biology of all living organisms. The efficient capture and characterization of relatively weak non-covalent interactions remains an important challenge in various fields of research. Photoaffinity labeling strategies can create covalent bonds between interacting partners, and photoactive scaffolds such as benzophenone, diazirines and aryl azides have proved widely useful. Since their first introduction, relatively few improvements have been advanced and products of photoaffinity labeling remain difficult to detect. We report a fluorinated azido-coumarin scaffold which enables photolabeling under fast and mild activation, and which can leave a fluorescent tag on crosslinked species. Coupling this scaffold to an α-fucoside, we demonstrate fluorogenic photolabeling of glycan-protein interactions over a wide range of affinities. We expect this strategy to be broadly applicable to other chromophores and we envision that such "fluoro-crosslinkers" could become important tools for the traceable capture of non-covalent binding events.
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Affiliation(s)
- Cécile Bousch
- Department of Chemistry, Université de Montréal, P.O. Box 6128, Station Downtown, Montréal, Québec H3 C 3 J7, Canada
| | - Brandon Vreulz
- Department of Chemistry, Université de Montréal, P.O. Box 6128, Station Downtown, Montréal, Québec H3 C 3 J7, Canada
| | - Kartikey Kansal
- Department of Chemistry, Université de Montréal, P.O. Box 6128, Station Downtown, Montréal, Québec H3 C 3 J7, Canada
| | - Ali El-Husseini
- Department of Chemistry, Université de Montréal, P.O. Box 6128, Station Downtown, Montréal, Québec H3 C 3 J7, Canada
| | - Samy Cecioni
- Department of Chemistry, Université de Montréal, P.O. Box 6128, Station Downtown, Montréal, Québec H3 C 3 J7, Canada
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Murai Y, Hashimoto M. Heteroaromatic Diazirines Are Essential Building Blocks for Material and Medicinal Chemistry. Molecules 2023; 28:molecules28031408. [PMID: 36771073 PMCID: PMC9921084 DOI: 10.3390/molecules28031408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 01/26/2023] [Accepted: 01/26/2023] [Indexed: 02/05/2023] Open
Abstract
In materials (polymer) science and medicinal chemistry, heteroaromatic derivatives play the role of the central skeleton in development of novel devices and discovery of new drugs. On the other hand, (3-trifluoromethyl)phenyldiazirine (TPD) is a crucial chemical method for understanding biological processes such as ligand-receptor, nucleic acid-protein, lipid-protein, and protein-protein interactions. In particular, use of TPD has increased in recent materials science to create novel electric and polymer devices with comparative ease and reduced costs. Therefore, a combination of heteroaromatics and (3-trifluoromethyl)diazirine is a promising option for creating better materials and elucidating the unknown mechanisms of action of bioactive heteroaromatic compounds. In this review, a comprehensive synthesis of (3-trifluoromethyl)diazirine-substituted heteroaromatics is described.
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Affiliation(s)
- Yuta Murai
- Graduate School of Life Science, Hokkaido University, Kita 21, Nishi 11, Kita-ku, Sapporo 001-0021, Japan
- Faculty of Advanced Life Science, Hokkaido University, Kita 21, Nishi 11, Kita-ku, Sapporo 001-0021, Japan
- Correspondence: (Y.M.); (M.H.); Tel.: +81-11-706-9030 (Y.M.); +81-11-706-3849 (M.H.)
| | - Makoto Hashimoto
- Division of Applied Bioscience, Graduate School of Agriculture, Hokkaido University, Kita 9, Nishi 9, Kita-ku, Sapporo 060-8589, Japan
- Correspondence: (Y.M.); (M.H.); Tel.: +81-11-706-9030 (Y.M.); +81-11-706-3849 (M.H.)
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Kozoriz K, Shkel O, Hong KT, Kim DH, Kim YK, Lee JS. Multifunctional Photo-Cross-Linking Probes: From Target Protein Searching to Imaging Applications. Acc Chem Res 2023; 56:25-36. [PMID: 36534922 DOI: 10.1021/acs.accounts.2c00505] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Despite advances in genome sequencing technology, the complete molecular interaction networks reflecting the biological functions of gene products have not been fully elucidated due to the lack of robust molecular interactome profiling techniques. Traditionally, molecular interactions have been investigated in vitro by measuring their affinity. However, such a reductionist approach comes with throughput constraints and does not depict an intact living cell environment. Therefore, molecular interactions in live cells must be captured to minimize false-positive results. The photo-cross-linking technique is a promising tool because the production of a temporally controlled reactive functional group can be induced using light exposure. Photoaffinity labeling is used in biochemistry and medicinal chemistry for bioconjugation, including drug and antibody conjugation, target protein identification of bioactive compounds, and fluorescent labeling of target proteins. This Account summarizes recent advances in multifunctional photo-cross-linkers for drug target identification and bioimaging. In addition to our group's contributions, we reviewed the most notable examples from the last few decades to provide a comprehensive overview of how this field is evolving. Based on cross-linking chemistry, photo-cross-linkers are classified as either (i) reactive intermediate-generating or (ii) electrophile-generating. Reactive intermediates generating photoaffinity tags have been extensively modified to target a molecule of interest using aryl azide, benzophenone, diazirine, diazo, and acyl silanes. These species are highly reactive and can form covalent bonds, irrespective of residue. Their short lifetime is ideal for the instant capture and labeling of biomolecules. Recently, photocaged electrophiles have been investigated to take advantage of their residue selectivity and relatively high yield for adduct formation with tetrazole, nitrobenzyl alcohol, o-nitrophenylethylene, pyrone, and pyrimidone. Multifunctional photo-cross-linkers for two parallel practical applications have been developed using both classes of photoactivatable groups. Unbiased target interactome profiling of small-molecule drugs requires a challenging structure-activity relationship study (SAR) step to retain the nature or biological activity of the lead compound, which led to the design of a multifunctional "minimalist tag" comprising a bio-orthogonal handle, a photoaffinity labeling group, and functional groups to load target molecules. In contrast, fluorogenic photo-cross-linking is advantageous for bioimaging because it does not require an additional bio-orthogonal reaction to introduce a fluorophore to the minimalist tag. Our group has made progress on minimalist tags and fluorogenic photo-cross-linkers through fruitful collaborations with other groups. The current range of photoactivation reactions and applications demonstrate that photoaffinity tags can be improved. We expect exciting days in the rational design of new multifunctional photo-cross-linkers, particularly clinically interesting versions used in photodynamic or photothermal therapy.
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Affiliation(s)
- Kostiantyn Kozoriz
- Department of Pharmacology, Korea University College of Medicine, 73 Goryeodae-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Olha Shkel
- Convergence Research Center for Brain Science, Korea Institute of Science and Technology (KIST) & Bio-Med Program, KIST-School UST, Hwarang-ro 14 gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Kyung Tae Hong
- Convergence Research Center for Brain Science, Korea Institute of Science and Technology (KIST) & Bio-Med Program, KIST-School UST, Hwarang-ro 14 gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Dong Hoon Kim
- Department of Pharmacology, Korea University College of Medicine, 73 Goryeodae-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Yun Kyung Kim
- Convergence Research Center for Brain Science, Korea Institute of Science and Technology (KIST) & Bio-Med Program, KIST-School UST, Hwarang-ro 14 gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Jun-Seok Lee
- Department of Pharmacology, Korea University College of Medicine, 73 Goryeodae-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
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Singh J, Tan NCS, Mahadevaswamy UR, Chanchareonsook N, Steele TWJ, Lim S. Bacterial cellulose adhesive composites for oral cavity applications. Carbohydr Polym 2021; 274:118403. [PMID: 34702445 DOI: 10.1016/j.carbpol.2021.118403] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 06/22/2021] [Accepted: 07/04/2021] [Indexed: 11/19/2022]
Abstract
Topical approaches to oral diseases require frequent dosing due to limited retention time. A mucoadhesive drug delivery platform with extended soft tissue adhesion capability of up to 7 days is proposed for on-site management of oral wound. Bacterial cellulose (BC) and photoactivated carbene-based bioadhesives (PDz) are combined to yield flexible film platform for interfacing soft tissues in dynamic, wet environments. Structure-activity relationships evaluate UV dose and hydration state with respect to adhesive strength on soft tissue mimics. The bioadhesive composite has an adhesion strength ranging from 7 to 17 kPa and duration exceeding 48 h in wet conditions under sustained shear forces, while other mucoadhesives based on hydrophilic macromolecules exhibit adhesion strength of 0.5-5 kPa and last only a few hours. The work highlights the first evaluation of BC composites for mucoadhesive treatments in the buccal cavity.
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Affiliation(s)
- Juhi Singh
- NTU Institute for Health Technologies, Interdisciplinary Graduate Program, Nanyang Technological University, 61 Nanyang Drive, Singapore 637335, Singapore; School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Block N1.3, Singapore 637457, Singapore.
| | - Nigel C S Tan
- School of Materials Science and Engineering, Division of Materials Technology, Nanyang Technological University, 50 Nanyang Avenue, Block N4.1, Singapore 639798, Singapore.
| | - Usha Rani Mahadevaswamy
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Block N1.3, Singapore 637457, Singapore.
| | - Nattharee Chanchareonsook
- Department of Oral and Maxillofacial Surgery, National Dental Centre Singapore (NDCS), 5 Second Hospital Avenue, Singapore 16893, Singapore
| | - Terry W J Steele
- School of Materials Science and Engineering, Division of Materials Technology, Nanyang Technological University, 50 Nanyang Avenue, Block N4.1, Singapore 639798, Singapore.
| | - Sierin Lim
- NTU Institute for Health Technologies, Interdisciplinary Graduate Program, Nanyang Technological University, 61 Nanyang Drive, Singapore 637335, Singapore; School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Block N1.3, Singapore 637457, Singapore.
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Cauwel M, Guillou C, Renault K, Schapman D, Bénard M, Galas L, Cosette P, Renard PY, Sabot C. 3-Benzoylquinoxalinone as a photoaffinity labelling derivative with fluorogenic properties allowing reaction monitoring under "no-wash" conditions. Chem Commun (Camb) 2021; 57:3893-3896. [PMID: 33871509 DOI: 10.1039/d1cc01072g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Described herein is a quinoxalinone-based photoaffinity probe with caged fluorescence properties. Upon visible blue LED irradiation (λmax 450 nm), this photo-crosslinker is able to covalently capture proteins with concomitant fluorescence labelling. This process enables monitoring applications under "no wash" conditions.
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Affiliation(s)
- Madeleine Cauwel
- Normandie Univ, CNRS, UNIROUEN, INSA Rouen, COBRA (UMR 6014), Rouen 76000, France.
| | - Clément Guillou
- Normandie Univ, CNRS, UNIROUEN, INSA Rouen, PBS-UMR6270 CNRS, PISSARO Proteomics Facility, IRIB, Rouen 76000, France
| | - Kévin Renault
- Normandie Univ, CNRS, UNIROUEN, INSA Rouen, COBRA (UMR 6014), Rouen 76000, France.
| | - Damien Schapman
- Normandie Univ, Inserm, UNIROUEN, PRIMACEN, Cell Imaging Platform of Normandy, IRIB, Rouen 76000, France
| | - Magalie Bénard
- Normandie Univ, Inserm, UNIROUEN, PRIMACEN, Cell Imaging Platform of Normandy, IRIB, Rouen 76000, France
| | - Ludovic Galas
- Normandie Univ, Inserm, UNIROUEN, PRIMACEN, Cell Imaging Platform of Normandy, IRIB, Rouen 76000, France
| | - Pascal Cosette
- Normandie Univ, CNRS, UNIROUEN, INSA Rouen, PBS-UMR6270 CNRS, PISSARO Proteomics Facility, IRIB, Rouen 76000, France
| | - Pierre-Yves Renard
- Normandie Univ, CNRS, UNIROUEN, INSA Rouen, COBRA (UMR 6014), Rouen 76000, France.
| | - Cyrille Sabot
- Normandie Univ, CNRS, UNIROUEN, INSA Rouen, COBRA (UMR 6014), Rouen 76000, France.
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Dai SY, Yang D. A Visible and Near-Infrared Light Activatable Diazocoumarin Probe for Fluorogenic Protein Labeling in Living Cells. J Am Chem Soc 2020; 142:17156-17166. [PMID: 32870680 DOI: 10.1021/jacs.0c08068] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Chemical modification of proteins in living cells permits valuable glimpses into the molecular interactions that underpin dynamic cellular events. While genetic engineering methods are often preferred, selective labeling of endogenous proteins in a complex intracellular milieu with chemical approaches represents a significant challenge. In this study, we report novel diazocoumarin compounds that can be photoactivated by visible (430-490 nm) and near-infrared light (800 nm) irradiation to photo-uncage reactive carbene intermediates, which could subsequently undergo an insertion reaction with concomitant fluorescence "turned on". With these new molecules in hand, we have developed a new approach for rapid, selective, and fluorogenic labeling of endogenous protein in living cells. By using CA-II and eDHFR as model proteins, we demonstrated that subcellular localization of proteins can be precisely visualized by live-cell imaging and protein levels can be reliably quantified in multiple cell types using flow cytometry. Dynamic protein regulations such as hypoxia-induced CA-IX accumulation can also be detected. In addition, by two-photon excitation with an 800 nm laser, cell-selective labeling can also be achieved with spatially controlled irradiation. Our method circumvents the cytotoxicity of UV light and obviates the need for introducing external reporters with "click chemistries". We believe that this approach of fluorescence labeling of endogenous protein by bioorthogonal photoirradiation opens up exciting opportunities for discoveries and mechanistic interrogation in chemical biology.
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Affiliation(s)
- Sheng-Yao Dai
- Morningside Laboratory for Chemical Biology, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Dan Yang
- Morningside Laboratory for Chemical Biology, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
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Hotta Y, Kaneko T, Hayashi R, Yamamoto A, Morimoto S, Chiba J, Tomohiro T. Photoinduced Electron Transfer‐Regulated Protein Labeling With a Coumarin‐Based Multifunctional Photocrosslinker. Chem Asian J 2019; 14:398-402. [DOI: 10.1002/asia.201801673] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Indexed: 01/04/2023]
Affiliation(s)
- Yusuke Hotta
- Graduate School of Medicine and Pharmaceutical SciencesUniversity of Toyama 2630 Sugitani Toyama 930-0194 Japan
| | - Tsukasa Kaneko
- Graduate School of Medicine and Pharmaceutical SciencesUniversity of Toyama 2630 Sugitani Toyama 930-0194 Japan
| | - Ryuji Hayashi
- Graduate School of Medicine and Pharmaceutical SciencesUniversity of Toyama 2630 Sugitani Toyama 930-0194 Japan
| | - Akito Yamamoto
- Graduate School of Medicine and Pharmaceutical SciencesUniversity of Toyama 2630 Sugitani Toyama 930-0194 Japan
| | - Shota Morimoto
- Graduate School of Medicine and Pharmaceutical SciencesUniversity of Toyama 2630 Sugitani Toyama 930-0194 Japan
- Department of Pharmaceutical SciencesSuzuka University of Medical Science Suzuka Mie 510-0293 Japan
| | - Junya Chiba
- Graduate School of Medicine and Pharmaceutical SciencesUniversity of Toyama 2630 Sugitani Toyama 930-0194 Japan
| | - Takenori Tomohiro
- Graduate School of Medicine and Pharmaceutical SciencesUniversity of Toyama 2630 Sugitani Toyama 930-0194 Japan
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9
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Murale DP, Hong SC, Haque MM, Lee JS. Photo-affinity labeling (PAL) in chemical proteomics: a handy tool to investigate protein-protein interactions (PPIs). Proteome Sci 2017; 15:14. [PMID: 28652856 PMCID: PMC5483283 DOI: 10.1186/s12953-017-0123-3] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Accepted: 06/15/2017] [Indexed: 12/14/2022] Open
Abstract
Protein-protein interactions (PPIs) trigger a wide range of biological signaling pathways that are crucial for biomedical research and drug discovery. Various techniques have been used to study specific proteins, including affinity chromatography, activity-based probes, affinity-based probes and photo-affinity labeling (PAL). PAL has become one of the most powerful strategies to study PPIs. Traditional photocrosslinkers are used in PAL, including benzophenone, aryl azide, and diazirine. Upon photoirradiation, these photocrosslinkers (Pls) generate highly reactive species that react with adjacent molecules, resulting in a direct covalent modification. This review introduces recent examples of chemical proteomics study using PAL for PPIs.
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Affiliation(s)
- Dhiraj P Murale
- Molecular Recognition Research Center, Korea Institute of Science and Technology, 39-1 Hawolgok-dong, Seoul, 136-791 Republic of Korea
| | - Seong Cheol Hong
- Molecular Recognition Research Center, Korea Institute of Science and Technology, 39-1 Hawolgok-dong, Seoul, 136-791 Republic of Korea.,Department of Biological Chemistry, KIST-School UST, 39-1 Hawolgok-dong, Seoul, 136-791 Republic of Korea
| | - Md Mamunul Haque
- Molecular Recognition Research Center, Korea Institute of Science and Technology, 39-1 Hawolgok-dong, Seoul, 136-791 Republic of Korea
| | - Jun-Seok Lee
- Molecular Recognition Research Center, Korea Institute of Science and Technology, 39-1 Hawolgok-dong, Seoul, 136-791 Republic of Korea.,Department of Biological Chemistry, KIST-School UST, 39-1 Hawolgok-dong, Seoul, 136-791 Republic of Korea
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Sakurai K, Yasui T, Mizuno S. Comparative Analysis of the Reactivity of Diazirine-Based Photoaffinity Probes toward a Carbohydrate-Binding Protein. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500116] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Kaori Sakurai
- Department of Biotechnology and Life Science; Tokyo University of Agriculture and Technology; 2-24-16, Naka-cho, Koganei-shi Tokyo, 184-8588 Japan
| | - Tomoki Yasui
- Department of Biotechnology and Life Science; Tokyo University of Agriculture and Technology; 2-24-16, Naka-cho, Koganei-shi Tokyo, 184-8588 Japan
| | - Sakae Mizuno
- Department of Biotechnology and Life Science; Tokyo University of Agriculture and Technology; 2-24-16, Naka-cho, Koganei-shi Tokyo, 184-8588 Japan
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11
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Hatanaka Y. Development and Leading-Edge Application of Innovative Photoaffinity Labeling. Chem Pharm Bull (Tokyo) 2015; 63:1-12. [DOI: 10.1248/cpb.c14-00645] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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12
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Tomohiro T, Hatanaka Y. Diazirine-Based Multifunctional Photo-Probes for Affinity-Based Elucidation of Protein-Ligand Interaction. HETEROCYCLES 2014. [DOI: 10.3987/rev-14-803] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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