1
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Wang C, Wang Y, Feng M, Yuan R, Chen G. A thiol-anchored solvatochromic and fluorogenic molecular rotor for covalent protein labeling in SDS-PAGE and mitochondria specific fluorescence imaging. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:3684-3691. [PMID: 38804857 DOI: 10.1039/d4ay00376d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
Fluorescent labeling is a widely used method for protein detection and fluorescence imaging. A solvatochromic and fluorogenic molecular rotor DASPBCl was developed for covalent protein labeling in solution and SDS-PAGE, and also for stable mitochondria labeling and fluorescence imaging. The dye DASPBCl consisted of a 4-(N,N-dimethylamino)phenyl moiety as the electron donor and a positively charged N-benzylpyridinium moiety as the electron acceptor. A benzyl chloride group was introduced into the pyridine moiety for covalent labeling of thiol in proteins. When the fluorescent dye DASPBCl is covalently labeled to the thiol of proteins, significantly enhanced fluorescence was obtained, which is attributed to the polarity sensitivity caused solvatochromic effect from the hydrophobic protein structure and the viscosity sensitivity caused fluorogenic effect from the restriction of single bond rotation. DASPBCl exhibits high sensitivity and good linear response for protein detection in SDS-PAGE analysis with both the pre-staining method and post-staining method. DASPBCl was also successfully used for covalently protein-anchored fluorescence imaging of mitochondria in living cells.
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Affiliation(s)
- Chao Wang
- College of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi'an 710021, China.
| | - Yujie Wang
- College of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi'an 710021, China.
| | - Mengxiang Feng
- College of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi'an 710021, China.
| | - Rongrong Yuan
- College of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi'an 710021, China.
| | - Guang Chen
- College of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi'an 710021, China.
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2
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Kozma E, Kele P. Bioorthogonal Reactions in Bioimaging. Top Curr Chem (Cham) 2024; 382:7. [PMID: 38400853 PMCID: PMC10894152 DOI: 10.1007/s41061-024-00452-1] [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: 10/27/2023] [Accepted: 01/22/2024] [Indexed: 02/26/2024]
Abstract
Visualization of biomolecules in their native environment or imaging-aided understanding of more complex biomolecular processes are one of the focus areas of chemical biology research, which requires selective, often site-specific labeling of targets. This challenging task is effectively addressed by bioorthogonal chemistry tools in combination with advanced synthetic biology methods. Today, the smart combination of the elements of the bioorthogonal toolbox allows selective installation of multiple markers to selected targets, enabling multicolor or multimodal imaging of biomolecules. Furthermore, recent developments in bioorthogonally applicable probe design that meet the growing demands of superresolution microscopy enable more complex questions to be addressed. These novel, advanced probes enable highly sensitive, low-background, single- or multiphoton imaging of biological species and events in live organisms at resolutions comparable to the size of the biomolecule of interest. Herein, the latest developments in bioorthogonal fluorescent probe design and labeling schemes will be discussed in the context of in cellulo/in vivo (multicolor and/or superresolved) imaging schemes. The second part focuses on the importance of genetically engineered minimal bioorthogonal tags, with a particular interest in site-specific protein tagging applications to answer biological questions.
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Affiliation(s)
- Eszter Kozma
- Chemical Biology Research Group, Institute of Organic Chemistry, HUN-REN Research Centre for Natural Sciences, Magyar Tudósok Krt. 2, Budapest, 1117, Hungary
| | - Péter Kele
- Chemical Biology Research Group, Institute of Organic Chemistry, HUN-REN Research Centre for Natural Sciences, Magyar Tudósok Krt. 2, Budapest, 1117, Hungary.
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3
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Albitz E, Németh K, Knorr G, Kele P. Evaluation of bioorthogonally applicable tetrazine-Cy3 probes for fluorogenic labeling schemes. Org Biomol Chem 2023; 21:7358-7366. [PMID: 37646224 DOI: 10.1039/d3ob01204b] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
The fluorogenic features of three sets of tetrazine-Cy3 probes were evaluated in bioorthogonal tetrazine-cyclooctyne ligation schemes. These studies revealed that the more efficient, internal conversion-based quenching of fluorescence by the tetrazine modul is translated to improved fluorogenicity compared to the more conventional, energy transfer-enabled design. Furthermore, a comparison of directly conjugated probes and vinylene-linked tetrazine-Cy3 probes revealed that more intimate conjugation of the tetrazine and the chromophore results in more efficient IC-based quenching even in spectral ranges where tetrazine exhibits diminished modulation efficiency. The applicability of these tetrazine-quenched fluorogenic Cy3 probes was demonstrated in the fluorogenic labeling schemes of the extra- and intracellular proteins of live cells.
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Affiliation(s)
- Evelin Albitz
- Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, Magyar tudósok krt. 2, H-1117, Budapest, Hungary.
- Hevesy György PhD School of Chemistry, Eötvös Loránd University, Pázmány Péter sétány 1/a, H-1117, Budapest, Hungary
| | - Krisztina Németh
- Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, Magyar tudósok krt. 2, H-1117, Budapest, Hungary.
| | - Gergely Knorr
- Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, Magyar tudósok krt. 2, H-1117, Budapest, Hungary.
| | - Péter Kele
- Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, Magyar tudósok krt. 2, H-1117, Budapest, Hungary.
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4
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Hild F, Werther P, Yserentant K, Wombacher R, Herten DP. A dark intermediate in the fluorogenic reaction between tetrazine fluorophores and trans-cyclooctene. BIOPHYSICAL REPORTS 2022; 2:100084. [PMID: 36570717 PMCID: PMC9782730 DOI: 10.1016/j.bpr.2022.100084] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Accepted: 11/02/2022] [Indexed: 11/07/2022]
Abstract
Fluorogenic labeling via bioorthogonal tetrazine chemistry has proven to be highly successful in fluorescence microscopy of living cells. To date, trans-cyclooctene (TCO) and bicyclonyne have been found to be the most useful substrates for live-cell labeling owing to their fast labeling kinetics, high biocompatibility, and bioorthogonality. Recent kinetic studies of fluorogenic click reactions with TCO derivatives showed a transient fluorogenic effect but could not explain the reaction sequence and the contributions of different intermediates. More recently, fluorescence quenching by potential intermediates has been investigated, suggesting their occurrence in the reaction sequence. However, in situ studies of the click reaction that directly relate these observations to the known reaction sequence are still missing. In this study, we developed a single-molecule fluorescence detection framework to investigate fluorogenic click reactions. In combination with data from ultra-performance liquid chromatography-tandem mass spectrometry, this explains the transient intensity increase by relating fluorescent intermediates to the known reaction sequence of TCO with fluorogenic tetrazine dyes. More specifically, we confirm that the reaction of TCO with tetrazine rapidly forms a fluorescent 4,5-dihydropyridazine species that slowly tautomerizes to a weakly fluorescent 1,4-dihydropyridazine, explaining the observed drop in fluorescence intensity. On a much slower timescale of hours/days, the fluorescence intensity may be recovered by oxidation of the intermediate to a pyridazine. Our findings are of importance for quantitative applications in fluorescence microscopy and spectroscopy as the achieved peak intensity with TCO depends on the specific experimental settings. They clearly indicate the requirement for more robust benchmarking of click reactions with tetrazine dyes and the need for alternative dienophiles with fast reaction kinetics and stable fluorescence emission to further applications in advanced fluorescence microscopy.
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Affiliation(s)
- Felix Hild
- Physikalisch-Chemisches Institut, Heidelberg University, Heidelberg, Germany
| | - Philipp Werther
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, Heidelberg, Germany
| | - Klaus Yserentant
- Physikalisch-Chemisches Institut, Heidelberg University, Heidelberg, Germany,Institute of Cardiovascular Sciences, College of Medical and Dental Sciences and School of Chemistry, University of Birmingham, Birmingham, United Kingdom,Centre of Membrane Proteins and Receptors (COMPARE), The Universities of Birmingham and Nottingham, Birmingham, West Midlands, United Kingdom
| | - Richard Wombacher
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, Heidelberg, Germany,Max-Planck-Institut für Medizinische Forschung, Heidelberg, Germany
| | - Dirk-Peter Herten
- Physikalisch-Chemisches Institut, Heidelberg University, Heidelberg, Germany,Institute of Cardiovascular Sciences, College of Medical and Dental Sciences and School of Chemistry, University of Birmingham, Birmingham, United Kingdom,Centre of Membrane Proteins and Receptors (COMPARE), The Universities of Birmingham and Nottingham, Birmingham, West Midlands, United Kingdom,Corresponding author
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5
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Bioorthogonal Ligation‐Activated Fluorogenic FRET Dyads. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202111855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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6
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Albitz E, Kern D, Kormos A, Bojtár M, Török G, Biró A, Szatmári Á, Németh K, Kele P. Bioorthogonal Ligation-Activated Fluorogenic FRET Dyads. Angew Chem Int Ed Engl 2021; 61:e202111855. [PMID: 34861094 PMCID: PMC9305863 DOI: 10.1002/anie.202111855] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Indexed: 12/04/2022]
Abstract
An energy transfer‐based signal amplification relay concept enabling transmission of bioorthogonally activatable fluorogenicity of blue‐excitable coumarins to yellow/red emitting cyanine frames is presented. Such relay mechanism resulted in improved cyanine fluorogenicities together with increased photostabilities and large apparent Stokes‐shifts allowing lower background fluorescence even in no‐wash bioorthogonal fluorogenic labeling schemes of intracellular structures in live cells. These energy transfer dyads sharing the same donor moiety together with their parent donor molecule allowed three‐color imaging of intracellular targets using one single excitation source with separate emission windows. Sub‐diffraction imaging of intracellular structures using the bioorthogonally activatable FRET dyads by STED microscopy is also presented.
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Affiliation(s)
- Evelin Albitz
- Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar tudósok krt. 2, 1117, Budapest, Hungary.,Hevesy György PhD School of Chemistry, Eötvös Loránd University, Pázmány Péter sétány 1/a, 1117, Budapest, Hungary
| | - Dóra Kern
- Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar tudósok krt. 2, 1117, Budapest, Hungary.,Hevesy György PhD School of Chemistry, Eötvös Loránd University, Pázmány Péter sétány 1/a, 1117, Budapest, Hungary
| | - Attila Kormos
- Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar tudósok krt. 2, 1117, Budapest, Hungary
| | - Márton Bojtár
- Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar tudósok krt. 2, 1117, Budapest, Hungary
| | - György Török
- Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar tudósok krt. 2, 1117, Budapest, Hungary.,Department of Biophysics and Radiation Biology, Semmelweis University, Tűzoltó u. 37-47, 1094, Budapest, Hungary
| | - Adrienn Biró
- Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar tudósok krt. 2, 1117, Budapest, Hungary
| | - Ágnes Szatmári
- Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar tudósok krt. 2, 1117, Budapest, Hungary
| | - Krisztina Németh
- Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar tudósok krt. 2, 1117, Budapest, Hungary
| | - Péter Kele
- Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar tudósok krt. 2, 1117, Budapest, Hungary
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7
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Sabot C, Kele P. Novel Approaches in Biomolecule Labeling. Biomolecules 2021; 11:1809. [PMID: 34944453 PMCID: PMC8698964 DOI: 10.3390/biom11121809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 11/30/2021] [Indexed: 11/21/2022] Open
Abstract
The selective functionalization of biomolecules such as proteins, nucleic acids, lipids or carbohydrates is a focus of persistent interest due to their widespread use, ranging from basic chemical biology research to gain insight into biological processes to the most promising biomedical applications, including the development of diagnostics or targeted therapies [...].
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Affiliation(s)
- Cyrille Sabot
- Normandie University, CNRS, UNIROUEN, INSA Rouen, COBRA, 76000 Rouen, France
| | - Péter Kele
- Chemical Biology Research Group, Institute of Organic Chemistry, ELKH Research Centre for Natural Sciences, Magyar tudósok krt 2, H-1117 Budapest, Hungary
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8
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Kim K, Lee JH, Kim S, Lee S, Lee D, Kim HY, Kim I, Kim Y. Anti-amyloidogenic indolizino[3,2- c]quinolines as imaging probes differentiating dense-core, diffuse, and coronal plaques of amyloid-β. RSC Med Chem 2021; 12:1926-1934. [PMID: 34825188 PMCID: PMC8597658 DOI: 10.1039/d1md00030f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 09/13/2021] [Indexed: 11/21/2022] Open
Abstract
Abnormal deposition of amyloid-β (Aβ) is a major biomarker that is often used to diagnose Alzheimer's disease (AD). The Aβ plaque levels in the cortex and hippocampus are measured by either brain histology or positron emission tomography. Although cerebral plaques are found in several phenotypes, such as dense-core, diffuse, and coronal, imaging probes differentiating these plaques are currently unavailable. Here, we report that fluorescent indolizino[3,2-c]quinoline derivatives (YIQ) distinguish Aβ plaque phenotypes in brains of 5XFAD Alzheimer transgenic mice. We synthesized and screened 64 YIQ compounds through a series of in vitro and ex vivo Aβ staining assays. We found 20 compounds that could stain the Aβ phenotypes, 10 for dense-core plaques, eight for both dense-core and diffuse plaques, and two for solely visualizing only the coronal plaques while leaving the centric core unstained. Among the 20 imaging candidates, five YIQs displaying anti-Aβ aggregation efficacy were confirmed by thioflavin T assays and electrophoretic analyses.
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Affiliation(s)
- Kyeonghwan Kim
- Department of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University Incheon 21983 Republic of Korea
| | - Jeong Hwa Lee
- Department of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University Incheon 21983 Republic of Korea
| | - Sunmi Kim
- Department of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University Incheon 21983 Republic of Korea
| | - Songmin Lee
- Department of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University Incheon 21983 Republic of Korea
| | - Donghee Lee
- Department of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University Incheon 21983 Republic of Korea
| | - Hye Yun Kim
- Department of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University Incheon 21983 Republic of Korea
| | - Ikyon Kim
- Department of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University Incheon 21983 Republic of Korea
| | - YoungSoo Kim
- Department of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University Incheon 21983 Republic of Korea
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9
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Handula M, Chen KT, Seimbille Y. IEDDA: An Attractive Bioorthogonal Reaction for Biomedical Applications. Molecules 2021; 26:molecules26154640. [PMID: 34361793 PMCID: PMC8347371 DOI: 10.3390/molecules26154640] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 07/26/2021] [Accepted: 07/27/2021] [Indexed: 12/26/2022] Open
Abstract
The pretargeting strategy has recently emerged in order to overcome the limitations of direct targeting, mainly in the field of radioimmunotherapy (RIT). This strategy is directly dependent on chemical reactions, namely bioorthogonal reactions, which have been developed for their ability to occur under physiological conditions. The Staudinger ligation, the copper catalyzed azide-alkyne cycloaddition (CuAAC) and the strain-promoted [3 + 2] azide–alkyne cycloaddition (SPAAC) were the first bioorthogonal reactions introduced in the literature. However, due to their incomplete biocompatibility and slow kinetics, the inverse-electron demand Diels-Alder (IEDDA) reaction was advanced in 2008 by Blackman et al. as an optimal bioorthogonal reaction. The IEDDA is the fastest bioorthogonal reaction known so far. Its biocompatibility and ideal kinetics are very appealing for pretargeting applications. The use of a trans-cyclooctene (TCO) and a tetrazine (Tz) in the reaction encouraged researchers to study them deeply. It was found that both reagents are sensitive to acidic or basic conditions. Furthermore, TCO is photosensitive and can be isomerized to its cis-conformation via a radical catalyzed reaction. Unfortunately, the cis-conformer is significantly less reactive toward tetrazine than the trans-conformation. Therefore, extensive research has been carried out to optimize both click reagents and to employ the IEDDA bioorthogonal reaction in biomedical applications.
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Affiliation(s)
- Maryana Handula
- Department of Radiology and Nuclear Medicine, Erasmus MC, University Medical Center Rotterdam, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands;
| | - Kuo-Ting Chen
- Department of Chemistry, National Dong Hwa University, Shoufeng, Hualien 974301, Taiwan;
| | - Yann Seimbille
- Department of Radiology and Nuclear Medicine, Erasmus MC, University Medical Center Rotterdam, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands;
- Life Sciences Division, TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada
- Correspondence: ; Tel.: +31-10-703-8961
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10
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Affiliation(s)
- Vincent Rigolot
- UMR 8576 CNRS Unité de Glycobiologie Structurale et Fonctionnelle Université de Lille Faculté des Sciences et Technologies Bât. C9, 59655 Villeneuve d'Ascq France
| | - Christophe Biot
- UMR 8576 CNRS Unité de Glycobiologie Structurale et Fonctionnelle Université de Lille Faculté des Sciences et Technologies Bât. C9, 59655 Villeneuve d'Ascq France
| | - Cedric Lion
- UMR 8576 CNRS Unité de Glycobiologie Structurale et Fonctionnelle Université de Lille Faculté des Sciences et Technologies Bât. C9, 59655 Villeneuve d'Ascq France
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11
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Rigolot V, Biot C, Lion C. To View Your Biomolecule, Click inside the Cell. Angew Chem Int Ed Engl 2021; 60:23084-23105. [PMID: 34097349 DOI: 10.1002/anie.202101502] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Indexed: 12/13/2022]
Abstract
The surging development of bioorthogonal chemistry has profoundly transformed chemical biology over the last two decades. Involving chemical partners that specifically react together in highly complex biological fluids, this branch of chemistry now allows researchers to probe biomolecules in their natural habitat through metabolic labelling technologies. Chemical reporter strategies include metabolic glycan labelling, site-specific incorporation of unnatural amino acids in proteins, and post-synthetic labelling of nucleic acids. While a majority of literature reports mark cell-surface exposed targets, implementing bioorthogonal ligations in the interior of cells constitutes a more challenging task. Owing to limiting factors such as membrane permeability of reagents, fluorescence background due to hydrophobic interactions and off-target covalent binding, and suboptimal balance between reactivity and stability of the designed molecular reporters and probes, these strategies need mindful planning to achieve success. In this review, we discuss the hurdles encountered when targeting biomolecules localized in cell organelles and give an easily accessible summary of the strategies at hand for imaging intracellular targets.
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Affiliation(s)
- Vincent Rigolot
- UMR 8576 CNRS, Unité de Glycobiologie Structurale et Fonctionnelle, Université de Lille, Faculté des Sciences et Technologies, Bât. C9, 59655, Villeneuve d'Ascq, France
| | - Christophe Biot
- UMR 8576 CNRS, Unité de Glycobiologie Structurale et Fonctionnelle, Université de Lille, Faculté des Sciences et Technologies, Bât. C9, 59655, Villeneuve d'Ascq, France
| | - Cedric Lion
- UMR 8576 CNRS, Unité de Glycobiologie Structurale et Fonctionnelle, Université de Lille, Faculté des Sciences et Technologies, Bât. C9, 59655, Villeneuve d'Ascq, France
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12
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Török G, Cserép GB, Telek A, Arany D, Váradi M, Homolya L, Kellermayer M, Kele P, Németh K. Large Stokes-shift bioorthogonal probes for STED, 2P-STED and multi-color STED nanoscopy. Methods Appl Fluoresc 2021; 9:015006. [PMID: 33427202 DOI: 10.1088/2050-6120/abb363] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Synthesis and multiple STED imaging applications of four, red-emitting (610-670 nm), tetrazine-functionalized fluorescent probes (CBRD = Chemical Biology Research group Dye 1-4) with large Stokes-shift is presented. Present studies revealed the super-resolution microscopy applicability of the probes as demonstrated through bioorthogonal labeling scheme of cytoskeletal proteins actin and keratin-19, and mitochondrial protein TOMM20. Furthermore, super-resolved images of insulin receptors in live-cell bioorthogonal labeling schemes through a genetically encoded cyclooctynylated non-canonical amino acid are also presented. The large Stokes-shifts and the wide spectral bands of the probes enabled the use of two common depletion lasers (660 nm and 775 nm). The probes were also found suitable for super-resolution microscopy in combination with two-photon excitation (2P-STED) resulting in improved spatial resolution. One of the dyes was also used together with two commercial dyes in the three-color STED imaging of intracellular structures.
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Affiliation(s)
- György Török
- Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, Magyar tudósok krt. 2., H-1117 Budapest, Hungary. Department of Biophysics and Radiation Biology, Semmelweis University, Tűzoltó u. 37-47., H-1094 Budapest, Hungary. Laboratory of Molecular Cell Biology, Institute of Enzymology, Research Centre for Natural Sciences, Magyar tudósok krt. 2., H-1117 Budapest, Hungary
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13
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Pinto‐Pacheco B, Carbery WP, Khan S, Turner DB, Buccella D. Fluorescence Quenching Effects of Tetrazines and Their Diels–Alder Products: Mechanistic Insight Toward Fluorogenic Efficiency. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202008757] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Brismar Pinto‐Pacheco
- Department of Chemistry New York University 100 Washington Square East New York NY 10003 USA
| | - William P. Carbery
- Department of Chemistry New York University 100 Washington Square East New York NY 10003 USA
| | - Sameer Khan
- Department of Chemistry New York University 100 Washington Square East New York NY 10003 USA
| | - Daniel B. Turner
- Department of Chemistry New York University 100 Washington Square East New York NY 10003 USA
- Current address: Micron School of Materials Science and Engineering Boise State University Boise ID 83725 USA
| | - Daniela Buccella
- Department of Chemistry New York University 100 Washington Square East New York NY 10003 USA
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14
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Pinto-Pacheco B, Carbery WP, Khan S, Turner DB, Buccella D. Fluorescence Quenching Effects of Tetrazines and Their Diels-Alder Products: Mechanistic Insight Toward Fluorogenic Efficiency. Angew Chem Int Ed Engl 2020; 59:22140-22149. [PMID: 33245600 DOI: 10.1002/anie.202008757] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 06/22/2020] [Indexed: 12/22/2022]
Abstract
Inverse electron demand Diels-Alder reactions between s-tetrazines and strained dienophiles have numerous applications in fluorescent labeling of biomolecules. Herein, we investigate the effect of the dienophile on the fluorescence enhancement obtained upon reaction with a tetrazine-quenched fluorophore and study the possible mechanisms of fluorescence quenching by both the tetrazine and its reaction products. The dihydropyridazine obtained from reaction with a strained cyclooctene shows a residual fluorescence quenching effect, greater than that exerted by the pyridazine arising from reaction with the analogous alkyne. Linear and ultrabroadband two-dimensional electronic spectroscopy experiments reveal that resonance energy transfer is the mechanism responsible for the fluorescence quenching effect of tetrazines, whereas a mechanism involving more intimate electronic coupling, likely photoinduced electron transfer, is responsible for the quenching effect of the dihydropyridazine. These studies uncover parameters that can be tuned to maximize fluorogenic efficiency in bioconjugation reactions and reveal that strained alkynes are better reaction partners for achieving maximum contrast ratio.
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Affiliation(s)
- Brismar Pinto-Pacheco
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY, 10003, USA
| | - William P Carbery
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY, 10003, USA
| | - Sameer Khan
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY, 10003, USA
| | - Daniel B Turner
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY, 10003, USA.,Current address: Micron School of Materials Science and Engineering, Boise State University, Boise, ID, 83725, USA
| | - Daniela Buccella
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY, 10003, USA
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15
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Bojtár M, Németh K, Domahidy F, Knorr G, Verkman A, Kállay M, Kele P. Conditionally Activatable Visible-Light Photocages. J Am Chem Soc 2020; 142:15164-15171. [PMID: 32786783 PMCID: PMC7472520 DOI: 10.1021/jacs.0c07508] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
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The proof of concept for conditionally
activatable photocages is
demonstrated on a new vinyltetrazine-derivatized coumarin. The tetrazine
form is disabled in terms of light-induced cargo release, however,
bioorthogonal transformation of the modulating tetrazine moiety results
in fully restored photoresponsivity. Irradiation of such a “click-armed”
photocage with blue light leads to fast and efficient release of a
set of caged model species, conjugated via various linkages. Live-cell
applicability of the concept was also demonstrated by the conditional
release of a fluorogenic probe using mitochondrial pretargeting.
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Affiliation(s)
- Márton Bojtár
- "Lendület" Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences. Magyar tudósok krt. 2, H-1117 Budapest, Hungary
| | - Krisztina Németh
- "Lendület" Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences. Magyar tudósok krt. 2, H-1117 Budapest, Hungary
| | - Farkas Domahidy
- "Lendület" Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences. Magyar tudósok krt. 2, H-1117 Budapest, Hungary
| | - Gergely Knorr
- "Lendület" Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences. Magyar tudósok krt. 2, H-1117 Budapest, Hungary.,Faculty of Chemistry and Earth Sciences, Friedrich-Schiller-Universität Jena, Lessingstraße 8, D-07743 Jena, Germany
| | - András Verkman
- "Lendület" Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences. Magyar tudósok krt. 2, H-1117 Budapest, Hungary
| | - Mihály Kállay
- Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, P.O. Box 91, H-1521 Budapest, Hungary
| | - Péter Kele
- "Lendület" Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences. Magyar tudósok krt. 2, H-1117 Budapest, Hungary
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Galeta J, Dzijak R, Obořil J, Dračínský M, Vrabel M. A Systematic Study of Coumarin-Tetrazine Light-Up Probes for Bioorthogonal Fluorescence Imaging. Chemistry 2020; 26:9945-9953. [PMID: 32339341 PMCID: PMC7497033 DOI: 10.1002/chem.202001290] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Indexed: 12/20/2022]
Abstract
Fluorescent probes that light-up upon reaction with complementary bioorthogonal reagents are superior tools for no-wash fluorogenic bioimaging applications. In this work, a thorough study is presented on a set of seventeen structurally diverse coumarin-tetrazine probes that produce fluorescent dyes with exceptional turn-on ratios when reacted with trans-cyclooctene (TCO) and bicyclononyne (BCN) dienophiles. In general, formation of the fully aromatic pyridazine-containing dyes resulting from the reaction with BCN was found superior in terms of fluorogenicity. However, evaluation of the probes in cellular imaging experiments revealed that other factors, such as reaction kinetics and good cell permeability, prevail over the fluorescence turn-on properties. The best compound identified in this study showed excellent performance in live cell-labeling experiments and enabled no-wash fluorogenic imaging on a timescale of seconds.
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Affiliation(s)
- Juraj Galeta
- Institute of Organic Chemistry and BiochemistryCzech Academy of SciencesFlemingovo nám. 2166 10PragueCzech Republic
| | - Rastislav Dzijak
- Institute of Organic Chemistry and BiochemistryCzech Academy of SciencesFlemingovo nám. 2166 10PragueCzech Republic
| | - Jan Obořil
- Institute of Organic Chemistry and BiochemistryCzech Academy of SciencesFlemingovo nám. 2166 10PragueCzech Republic
| | - Martin Dračínský
- Institute of Organic Chemistry and BiochemistryCzech Academy of SciencesFlemingovo nám. 2166 10PragueCzech Republic
| | - Milan Vrabel
- Institute of Organic Chemistry and BiochemistryCzech Academy of SciencesFlemingovo nám. 2166 10PragueCzech Republic
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