1
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Zhen G, Zeng G, Jiang K, Wang F, Cao X, Yin B. Visible-Light-Induced Diradical-Mediated ipso-Cyclization towards Double Dearomative [2+2]-Cycloaddition or Smiles-Type Rearrangement. Chemistry 2023; 29:e202203217. [PMID: 36460618 DOI: 10.1002/chem.202203217] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Revised: 12/01/2022] [Accepted: 12/02/2022] [Indexed: 12/05/2022]
Abstract
When mono-radical ipso-cyclization of aryl sulfonamides tend to undergo Smiles-type rearrangement through aromatization-driven C-S bond cleavage, diradical-mediated cyclization must perform in a distinct reaction pathway. It is interesting meanwhile challenging to tune the rate of C-S bond cleavage to achieve a chemically divergent reaction of (hetero) aryl sulfonamides in a visible-light induced energy transfer (EnT) reaction pathway involving diradical species. Herein a chemically divergent reaction based on the designed indole-tethered (hetero)arylsulfonamides is reported which involves a diradical-mediated ipso-cyclization and a controllable cleavage of an inherent C-S bond. The combined experimental and computational results have revealed that the cleavage of the C-S bond in these substrates can be controlled by tuning the heteroaryl moieties: a) If the (hetero)aryl is thienyl, furyl, phenanthryl, etc., the radical coupling of double dearomative diradicals (DDDR) precedes over C-S bond cleavage to afford cyclobutene fused indolines by double dearomative [2+2]-cycloaddition; b) if the (hetero)aryl is phenyl, naphthyl, pyridyl, indolyl etc., the cleavage of C-S bond in DDDR is favored over radical coupling to afford biaryl products.
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Affiliation(s)
- Guangjin Zhen
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology (SCUT), State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Guohui Zeng
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology (SCUT), State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Kai Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology (SCUT), State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Furong Wang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology (SCUT), State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Xiaohui Cao
- School of Pharmacy, Guangdong Pharmaceutical University, Pharmaceutical University, Guangzhou, 510006, P. R. China
| | - Biaolin Yin
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology (SCUT), State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, P. R. China
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2
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Martin MI, Pati AK, Abeywickrama CS, Bar S, Kilic Z, Altman RB, Blanchard SC. Leveraging Baird aromaticity for advancement of bioimaging applications. J PHYS ORG CHEM 2023; 36:e4449. [PMID: 36590885 PMCID: PMC9799245 DOI: 10.1002/poc.4449] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Revised: 10/03/2022] [Accepted: 10/04/2022] [Indexed: 02/01/2023]
Abstract
In this perspective, we highlight the recent progress in utilizing Baird aromatic species to improve fluorophore performance in microscopy and imaging applications. We specifically focus on the origins of the use of Baird aromaticity in fluorescence applications, the development of “self‐healing” fluorophores leveraging cyclooctatetraene’ Baird aromaticity, and where developments need to occur to optimize this technology.
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Affiliation(s)
- Maxwell I. Martin
- Department of Structural BiologySt. Jude Children's Research HospitalMemphisTNUSA
- Department of Chemical Biology & TherapeuticsSt. Jude Children's Research HospitalMemphisTNUSA
| | - Avik K. Pati
- Department of Structural BiologySt. Jude Children's Research HospitalMemphisTNUSA
| | - Chathura S. Abeywickrama
- Department of Structural BiologySt. Jude Children's Research HospitalMemphisTNUSA
- Department of Chemical Biology & TherapeuticsSt. Jude Children's Research HospitalMemphisTNUSA
| | - Sukanta Bar
- Department of Structural BiologySt. Jude Children's Research HospitalMemphisTNUSA
- Department of Chemical Biology & TherapeuticsSt. Jude Children's Research HospitalMemphisTNUSA
| | - Zeliha Kilic
- Department of Structural BiologySt. Jude Children's Research HospitalMemphisTNUSA
| | - Roger B. Altman
- Department of Structural BiologySt. Jude Children's Research HospitalMemphisTNUSA
- Department of Chemical Biology & TherapeuticsSt. Jude Children's Research HospitalMemphisTNUSA
| | - Scott C. Blanchard
- Department of Structural BiologySt. Jude Children's Research HospitalMemphisTNUSA
- Department of Chemical Biology & TherapeuticsSt. Jude Children's Research HospitalMemphisTNUSA
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3
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Sokolov AI, Gorshkova AA, Baleeva NS, Baranov MS. CycloOctaTetraene as a Photostabilizer of Fast Protein Fluorogen. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2022. [DOI: 10.1134/s1068162022060231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Abstract—
We report two new analogs of the N871b fluorogen that contain CycloOctaTetraene. We have studied the photostability of fluorescent complexes of the FAST protein with new compounds by confocal microscopy when staining living HeLa Kyoto cells. One of the new analogs exhibits a higher photostability in the complex with FAST than the previously published N871b fluorogen. The results indicate that cyclooctatetraene is a highly promising compound for the modification of dyes based on arylidene imidazolones.
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4
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Wen G, Leen V, Jia Y, Rohand T, Hofkens J. Improved Dye Survival in Expansion Microscopy through Stabilizer-Conjugated Linkers. Chemistry 2022; 28:e202202404. [PMID: 36031562 PMCID: PMC9828348 DOI: 10.1002/chem.202202404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Indexed: 01/12/2023]
Abstract
Expansion microscopy (ExM) has been widely used to detect biomolecules in cultured cells and tissue samples due to its enablement of super resolution imaging with conventional microscopes, via physical expansion of samples. However, reaction conditions inherent to the process bring about strong fluorescent signal loss during polymerization and digestion and thus limit the brightness of the signal obtained post expansion. Here, we explore the impact of stabilizer-containing organic fluorophores in ExM, as a mitigation strategy for this radical-induced dye degradation. Through direct conjugation of 4-nitrophenylalanine (NPA) to our previously developed trifunctional reagents, we validate and demonstrate that these multifunctional linkers enable visualization of different organelles with improved fluorescent intensity, owning to protection of the dyes to radical induced degradation as well as to photoprotection upon imaging. At this point, we cannot disentangle the relative contribution of both mechanisms. Furthermore, we report anchoring linkers that allow straightforward application of NPA or Trolox to commercially available fluorophore-conjugated antibodies. We show that these anchoring linkers enable complete retention of biological targets while increasing fluorophore photostability. Our results provide guidance in exploring these stabilizer-modified agents in ExM and methods for increased signal survival through the polymerization steps of the ExM protocols.
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Affiliation(s)
- Gang Wen
- Department of ChemistryKU LeuvenLeuven3001Belgium
| | | | - Yuqing Jia
- Department of Cell and Chemical BiologyLeiden University Medical CenterEinthovenweg 202333 ZCLeidenThe Netherlands
| | - Taoufik Rohand
- Laboratory of Analytical & Molecular Chemistry Faculty Polydisciplinaire of Safi Department of ChemistryUniversity Cadi Ayyad46000SafiMorocco
| | - Johan Hofkens
- Department of ChemistryKU LeuvenLeuven3001Belgium,Max Planck Institute for Polymer Research55128MainzGermany
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5
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Zhang L, Isselstein M, Köhler J, Eleftheriadis N, Huisjes NM, Guirao-Ortiz M, Narducci A, Smit JH, Stoffels J, Harz H, Leonhardt H, Herrmann A, Cordes T. Linker Molecules Convert Commercial Fluorophores into Tailored Functional Probes during Biolabelling. Angew Chem Int Ed Engl 2022; 61:e202112959. [PMID: 35146855 PMCID: PMC9305292 DOI: 10.1002/anie.202112959] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Indexed: 12/27/2022]
Abstract
Many life‐science techniques and assays rely on selective labeling of biological target structures with commercial fluorophores that have specific yet invariant properties. Consequently, a fluorophore (or dye) is only useful for a limited range of applications, e.g., as a label for cellular compartments, super‐resolution imaging, DNA sequencing or for a specific biomedical assay. Modifications of fluorophores with the goal to alter their bioconjugation chemistry, photophysical or functional properties typically require complex synthesis schemes. We here introduce a general strategy that allows to customize these properties during biolabelling with the goal to introduce the fluorophore in the last step of biolabelling. For this, we present the design and synthesis of ‘linker’ compounds, that bridge biotarget, fluorophore and a functional moiety via well‐established labeling protocols. Linker molecules were synthesized via the Ugi four‐component reaction (Ugi‐4CR) which facilitates a modular design of linkers with diverse functional properties and bioconjugation‐ and fluorophore attachment moieties. To demonstrate the possibilities of different linkers experimentally, we characterized the ability of commercial fluorophores from the classes of cyanines, rhodamines, carbopyronines and silicon‐rhodamines to become functional labels on different biological targets in vitro and in vivo via thiol‐maleimide chemistry. With our strategy, we showed that the same commercial dye can become a photostable self‐healing dye or a sensor for bivalent ions subject to the linker used. Finally, we quantified the photophysical performance of different self‐healing linker–fluorophore conjugates and demonstrated their applications in super‐resolution imaging and single‐molecule spectroscopy.
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Affiliation(s)
- Lei Zhang
- Physical and Synthetic Biology, Faculty of Biology, Ludwig-Maximilians-Universität München, Großhadernerstr. 2-4, 82152, Planegg-Martinsried, Germany.,Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Michael Isselstein
- Physical and Synthetic Biology, Faculty of Biology, Ludwig-Maximilians-Universität München, Großhadernerstr. 2-4, 82152, Planegg-Martinsried, Germany
| | - Jens Köhler
- (DWI) Leibniz Institute for Interactive Materials, Forckenbeckstr. 50, 52056, Aachen, Germany.,& Institute of Technical and Macromolecular Chemistry, (RWTH) Aachen University, Worringerweg 2, 52074, Aachen, Germany
| | - Nikolaos Eleftheriadis
- Molecular Microscopy Research Group, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Nadia M Huisjes
- Physical and Synthetic Biology, Faculty of Biology, Ludwig-Maximilians-Universität München, Großhadernerstr. 2-4, 82152, Planegg-Martinsried, Germany.,Molecular Microscopy Research Group, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Miguel Guirao-Ortiz
- Human Biology & Bioimaging, Faculty of Biology, Ludwig-Maximilians-Universität München, Großhadernerstr. 2-4, 82152, Planegg-Martinsried, Germany
| | - Alessandra Narducci
- Physical and Synthetic Biology, Faculty of Biology, Ludwig-Maximilians-Universität München, Großhadernerstr. 2-4, 82152, Planegg-Martinsried, Germany
| | - Jochem H Smit
- Molecular Microscopy Research Group, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Janko Stoffels
- (DWI) Leibniz Institute for Interactive Materials, Forckenbeckstr. 50, 52056, Aachen, Germany.,& Institute of Technical and Macromolecular Chemistry, (RWTH) Aachen University, Worringerweg 2, 52074, Aachen, Germany
| | - Hartmann Harz
- Human Biology & Bioimaging, Faculty of Biology, Ludwig-Maximilians-Universität München, Großhadernerstr. 2-4, 82152, Planegg-Martinsried, Germany
| | - Heinrich Leonhardt
- Human Biology & Bioimaging, Faculty of Biology, Ludwig-Maximilians-Universität München, Großhadernerstr. 2-4, 82152, Planegg-Martinsried, Germany
| | - Andreas Herrmann
- (DWI) Leibniz Institute for Interactive Materials, Forckenbeckstr. 50, 52056, Aachen, Germany.,& Institute of Technical and Macromolecular Chemistry, (RWTH) Aachen University, Worringerweg 2, 52074, Aachen, Germany
| | - Thorben Cordes
- Physical and Synthetic Biology, Faculty of Biology, Ludwig-Maximilians-Universität München, Großhadernerstr. 2-4, 82152, Planegg-Martinsried, Germany.,Molecular Microscopy Research Group, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
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6
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Kwon J, Elgawish MS, Shim S. Bleaching-Resistant Super-Resolution Fluorescence Microscopy. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2101817. [PMID: 35088584 PMCID: PMC8948665 DOI: 10.1002/advs.202101817] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 01/07/2022] [Indexed: 05/08/2023]
Abstract
Photobleaching is the permanent loss of fluorescence after extended exposure to light and is a major limiting factor in super-resolution microscopy (SRM) that restricts spatiotemporal resolution and observation time. Strategies for preventing or overcoming photobleaching in SRM are reviewed developing new probes and chemical environments. Photostabilization strategies are introduced first, which are borrowed from conventional fluorescence microscopy, that are employed in SRM. SRM-specific strategies are then highlighted that exploit the on-off transitions of fluorescence, which is the key mechanism for achieving super-resolution, which are becoming new routes to address photobleaching in SRM. Off states can serve as a shelter from excitation by light or an exit to release a damaged probe and replace it with a fresh one. Such efforts in overcoming the photobleaching limits are anticipated to enhance resolution to molecular scales and to extend the observation time to physiological lifespans.
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Affiliation(s)
- Jiwoong Kwon
- Department of Biophysics and Biophysical ChemistryJohns Hopkins UniversityBaltimoreMD21205USA
| | - Mohamed Saleh Elgawish
- Department of ChemistryKorea UniversitySeoul02841Republic of Korea
- Medicinal Chemistry DepartmentFaculty of PharmacySuez Canal UniversityIsmailia41522Egypt
| | - Sang‐Hee Shim
- Department of ChemistryKorea UniversitySeoul02841Republic of Korea
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7
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Zhang L, Isselstein M, Köhler J, Eleftheriadis N, Huisjes N, Guirao M, Narducci A, Smit J, Stoffels J, Harz H, Leonhardt H, Herrmann A, Cordes T. Linker Molecules Convert Commercial Fluorophores into Tailored Functional Probes during Bio‐labeling. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202112959] [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]
Affiliation(s)
- Lei Zhang
- LMU München: Ludwig-Maximilians-Universitat Munchen Biocenter GERMANY
| | | | - Jens Köhler
- DWI-Leibniz-Institut für Interaktive Materialien: DWI-Leibniz-Institut fur Interaktive Materialien Chemie GERMANY
| | | | - Nadia Huisjes
- RUG: Rijksuniversiteit Groningen Zernike NETHERLANDS
| | - Miguel Guirao
- LMU München: Ludwig-Maximilians-Universitat Munchen Biocenter GERMANY
| | | | - Jochem Smit
- RUG: Rijksuniversiteit Groningen Zernike NETHERLANDS
| | - Janko Stoffels
- DWI-Leibniz-Institut für Interaktive Materialien: DWI-Leibniz-Institut fur Interaktive Materialien Chemistry GERMANY
| | - Hartmann Harz
- LMU München: Ludwig-Maximilians-Universitat Munchen Biocenter GERMANY
| | | | - Andreas Herrmann
- DWI-Leibniz-Institut für Interaktive Materialien: DWI-Leibniz-Institut fur Interaktive Materialien Chemistry GERMANY
| | - Thorben Cordes
- Ludwig-Maximilians-Universitat Munchen Faculty of Biology Großhadernerstr. 2-4 82152 Planegg-Martiensried GERMANY
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8
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Schneider AFL, Benz LS, Lehmann M, Hackenberger CPR. Zellpermeable Nanobodys ermöglichen Zwei‐Farben‐Superauflösungsmikroskopie in lebenden, nicht transfizierten Zellen. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202103068] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Anselm F. L. Schneider
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP) Robert-Rössle-Straße 10 13125 Berlin Deutschland
- Institute of Chemistry and Biochemistry Freie Universität Berlin Takustraße 3 14189 Berlin Deutschland
| | - Laila S. Benz
- Institute of Chemistry and Biochemistry Freie Universität Berlin Takustraße 3 14189 Berlin Deutschland
| | - Martin Lehmann
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP) Robert-Rössle-Straße 10 13125 Berlin Deutschland
| | - Christian P. R. Hackenberger
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP) Robert-Rössle-Straße 10 13125 Berlin Deutschland
- Department of Chemistry Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Deutschland
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9
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Grupi A, Shapira Z, Yudovich S, Degani-Katzav N, Weiss S. Point-localized, site-specific membrane potential optical recording by single fluorescent nanodiscs. ACTA ACUST UNITED AC 2021; 1:None. [PMID: 34568861 PMCID: PMC8448295 DOI: 10.1016/j.bpr.2021.100007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 07/20/2021] [Indexed: 01/02/2023]
Abstract
Nanodisc technology was implemented as a platform for voltage nanosensors. A fluorescence (Förster) resonance energy transfer (FRET)- based voltage-sensing scheme employing fluorescent nanodiscs and the hydrophobic ion dipicrylamine was developed and utilized to optically record membrane potentials on the single-nanodisc level. Ensemble and single-nanosensor recordings were demonstrated for HEK293 cells and primary cortical neuron cells. Conjugation of nanodiscs to anti-GABAA antibodies allowed for site-specific membrane potential measurements from postsynaptic sites.
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Affiliation(s)
- Asaf Grupi
- Department of Physics, Institute for Nanotechnology and Advanced Materials.,Institute for Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan, Israel
| | - Zehavit Shapira
- Department of Physics, Institute for Nanotechnology and Advanced Materials.,Institute for Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan, Israel
| | - Shimon Yudovich
- Department of Physics, Institute for Nanotechnology and Advanced Materials.,Institute for Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan, Israel
| | - Nurit Degani-Katzav
- Department of Physics, Institute for Nanotechnology and Advanced Materials.,Institute for Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan, Israel
| | - Shimon Weiss
- Department of Physics, Institute for Nanotechnology and Advanced Materials.,Institute for Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan, Israel.,Department of Chemistry and Biochemistry.,California NanoSystems Institute, University of California Los Angeles, Los Angeles, California
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10
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Jurczyk J, Lux MC, Adpressa D, Kim SF, Lam YH, Yeung CS, Sarpong R. Photomediated ring contraction of saturated heterocycles. Science 2021; 373:1004-1012. [PMID: 34385352 PMCID: PMC8627180 DOI: 10.1126/science.abi7183] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 07/23/2021] [Indexed: 12/24/2022]
Abstract
Saturated heterocycles are found in numerous therapeutics and bioactive natural products and are abundant in many medicinal and agrochemical compound libraries. To access new chemical space and function, many methods for functionalization on the periphery of these structures have been developed. Comparatively fewer methods are known for restructuring their core framework. Herein, we describe a visible light-mediated ring contraction of α-acylated saturated heterocycles. This unconventional transformation is orthogonal to traditional ring contractions, challenging the paradigm for diversification of heterocycles including piperidine, morpholine, thiane, tetrahydropyran, and tetrahydroisoquinoline derivatives. The success of this Norrish type II variant rests on reactivity differences between photoreactive ketone groups in specific chemical environments. This strategy was applied to late-stage remodeling of pharmaceutical derivatives, peptides, and sugars.
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Affiliation(s)
- Justin Jurczyk
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | - Michaelyn C Lux
- Discovery Chemistry, Merck & Co., Inc., Boston, MA 02115, USA
| | - Donovon Adpressa
- Analytical Research and Development, Merck & Co. Inc., Boston, MA 02115, USA
| | - Sojung F Kim
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | - Yu-Hong Lam
- Computational and Structural Chemistry, Merck & Co. Inc., Rahway, NJ 07065, USA.
| | - Charles S Yeung
- Discovery Chemistry, Merck & Co., Inc., Boston, MA 02115, USA.
| | - Richmond Sarpong
- Department of Chemistry, University of California, Berkeley, CA 94720, USA.
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11
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Henrikus SS, Tassis K, Zhang L, van der Velde JHM, Gebhardt C, Herrmann A, Jung G, Cordes T. Characterization of Fluorescent Proteins with Intramolecular Photostabilization*. Chembiochem 2021; 22:3283-3291. [PMID: 34296494 PMCID: PMC9291837 DOI: 10.1002/cbic.202100276] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 07/02/2021] [Indexed: 11/10/2022]
Abstract
Genetically encodable fluorescent proteins have revolutionized biological imaging in vivo and in vitro. Despite their importance, their photophysical properties, i. e., brightness, count-rate and photostability, are relatively poor compared to synthetic organic fluorophores or quantum dots. Intramolecular photostabilizers were recently rediscovered as an effective approach to improve photophysical properties of organic fluorophores. Here, direct conjugation of triplet-state quenchers or redox-active substances creates high local concentrations of photostabilizer around the fluorophore. In this paper, we screen for effects of covalently linked photostabilizers on fluorescent proteins. We produced a double cysteine mutant (A206C/L221C) of α-GFP for attachment of photostabilizer-maleimides on the β-barrel near the chromophore. Whereas labelling with photostabilizers such as trolox, a nitrophenyl group, and cyclooctatetraene, which are often used for organic fluorophores, had no effect on α-GFP-photostability, a substantial increase of photostability was found upon conjugation to azobenzene. Although the mechanism of the photostabilizing effects remains to be elucidated, we speculate that the higher triplet-energy of azobenzene might be crucial for triplet-quenching of fluorophores in the blue spectral range. Our study paves the way for the development of fluorescent proteins with photostabilizers in the protein barrel by methods such as unnatural amino acid incorporation.
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Affiliation(s)
- Sarah S Henrikus
- Molecular Microscopy Research Group, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands.,Biophysical Chemistry, Saarland University, Campus Building B2.2, 66123, Saarbrücken, Germany.,current address: Francis Crick Institute, 1 Midland Road, London, NW1 AT1, UK
| | - Konstantinos Tassis
- Molecular Microscopy Research Group, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Lei Zhang
- Physical and Synthetic Biology, Faculty of Biology, Ludwig-Maximilians-Universität München, Großhadernerstr. 2-4, 82152, München - Planegg-Martinsried, Germany
| | - Jasper H M van der Velde
- Molecular Microscopy Research Group, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Christian Gebhardt
- Physical and Synthetic Biology, Faculty of Biology, Ludwig-Maximilians-Universität München, Großhadernerstr. 2-4, 82152, München - Planegg-Martinsried, Germany
| | - Andreas Herrmann
- Department of Polymer Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands.,DWI - Leibniz Institute for Interactive Materials, Forckenbeckstr. 50, 52056, Aachen, Germany
| | - Gregor Jung
- Biophysical Chemistry, Saarland University, Campus Building B2.2, 66123, Saarbrücken, Germany
| | - Thorben Cordes
- Molecular Microscopy Research Group, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands.,Physical and Synthetic Biology, Faculty of Biology, Ludwig-Maximilians-Universität München, Großhadernerstr. 2-4, 82152, München - Planegg-Martinsried, Germany
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12
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Schneider AFL, Benz LS, Lehmann M, Hackenberger CPR. Cell-Permeable Nanobodies Allow Dual-Color Super-Resolution Microscopy in Untransfected Living Cells. Angew Chem Int Ed Engl 2021; 60:22075-22080. [PMID: 34288299 PMCID: PMC8518916 DOI: 10.1002/anie.202103068] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 06/28/2021] [Indexed: 11/06/2022]
Abstract
Super‐resolution microscopy in living cells can be restricted by the availability of small molecule probes, which only exist against few targets and genetically encoded tags. Here, we expand the applicability of live‐cell STED by engineering cell‐permeable and highly fluorescent nanobodies as intracellular targeting agents. To ensure bright fluorescent signals at low concentrations we used the concept of intramolecular photostabilization by ligating a fluorophore along with the photostabilizer trolox to the nanobody using expressed protein ligation (EPL). Furthermore, these semi‐synthetic nanobodies are equipped with a cleavable cell‐penetrating peptide for efficient cellular entry, which enables super‐resolution imaging of GFP and mCherry, as well as two endogenous targets, nuclear lamins and the DNA replication and repair protein PCNA. We monitored cell division and DNA replication via confocal and STED microscopy thus demonstrating the utility of these new intracellular tools for functional analysis.
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Affiliation(s)
- Anselm F L Schneider
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Robert-Rössle-Strasse 10, 13125, Berlin, Germany.,Institute of Chemistry and Biochemistry, Freie Universität Berlin, Takustrasse 3, 14189, Berlin, Germany
| | - Laila S Benz
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Takustrasse 3, 14189, Berlin, Germany
| | - Martin Lehmann
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Robert-Rössle-Strasse 10, 13125, Berlin, Germany
| | - Christian P R Hackenberger
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Robert-Rössle-Strasse 10, 13125, Berlin, Germany.,Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489, Berlin, Germany
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13
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Xu J, Fan S, Xu L, Maruyama A, Fujitsuka M, Kawai K. Control of Triplet Blinking Using Cyclooctatetraene to Access the Dynamics of Biomolecules at the Single‐Molecule Level. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jie Xu
- The Institute of Scientific and Industrial Research (SANKEN) Osaka University Mihogaoka 8-1, Ibaraki Osaka 567-0047 Japan
| | - Shuya Fan
- The Institute of Scientific and Industrial Research (SANKEN) Osaka University Mihogaoka 8-1, Ibaraki Osaka 567-0047 Japan
| | - Lei Xu
- The Institute of Scientific and Industrial Research (SANKEN) Osaka University Mihogaoka 8-1, Ibaraki Osaka 567-0047 Japan
| | - Atsushi Maruyama
- Department of Life Science and Technology Tokyo Institute of Technology 4259 B-57 Nagatsuta, Midori-ku Yokohama Kanagawa 226-8501 Japan
| | - Mamoru Fujitsuka
- The Institute of Scientific and Industrial Research (SANKEN) Osaka University Mihogaoka 8-1, Ibaraki Osaka 567-0047 Japan
| | - Kiyohiko Kawai
- The Institute of Scientific and Industrial Research (SANKEN) Osaka University Mihogaoka 8-1, Ibaraki Osaka 567-0047 Japan
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14
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Xu J, Fan S, Xu L, Maruyama A, Fujitsuka M, Kawai K. Control of Triplet Blinking Using Cyclooctatetraene to Access the Dynamics of Biomolecules at the Single‐Molecule Level. Angew Chem Int Ed Engl 2021; 60:12941-12948. [DOI: 10.1002/anie.202101606] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 03/25/2021] [Indexed: 01/04/2023]
Affiliation(s)
- Jie Xu
- The Institute of Scientific and Industrial Research (SANKEN) Osaka University Mihogaoka 8-1, Ibaraki Osaka 567-0047 Japan
| | - Shuya Fan
- The Institute of Scientific and Industrial Research (SANKEN) Osaka University Mihogaoka 8-1, Ibaraki Osaka 567-0047 Japan
| | - Lei Xu
- The Institute of Scientific and Industrial Research (SANKEN) Osaka University Mihogaoka 8-1, Ibaraki Osaka 567-0047 Japan
| | - Atsushi Maruyama
- Department of Life Science and Technology Tokyo Institute of Technology 4259 B-57 Nagatsuta, Midori-ku Yokohama Kanagawa 226-8501 Japan
| | - Mamoru Fujitsuka
- The Institute of Scientific and Industrial Research (SANKEN) Osaka University Mihogaoka 8-1, Ibaraki Osaka 567-0047 Japan
| | - Kiyohiko Kawai
- The Institute of Scientific and Industrial Research (SANKEN) Osaka University Mihogaoka 8-1, Ibaraki Osaka 567-0047 Japan
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15
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Abstract
A series of free base meso-tetraarylporphyrins functionalized with substituents containing one, two, and four cyclooctatetraene (COT) moieties have been obtained and characterized by spectral and photophysical studies. Three COT-free porphyrins served as reference compounds. COT is a triplet quencher, well-known to enhance the photostability of several, but not all, fluorophores. In the case of porphyrins, substitution with COT improves photostability in zinc derivatives, but for free bases, the effect is the opposite. We show that placing the COT moiety further from the free base porphyrin core enhances the photostability when the COT group lies in the direct vicinity of the macrocycle. The quantum yields of photobleaching inversely correlate with porphyrin oxidation potentials. An improvement in photostability in both COT-containing and COT-free porphyrins can be achieved by screening the porphyrin core from oxygen by switching from tolyl to mesityl substituents. This leads to a decrease in the photobleaching quantum yield, even though triplet lifetimes are longer. The results confirm the involvement of oxygen in the photodegradation of porphyrins.
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16
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Kolmakov K, Winter FR, Sednev MV, Ghosh S, Borisov SM, Nizovtsev AV. Everlasting rhodamine dyes and true deciding factors in their STED microscopy performance. Photochem Photobiol Sci 2020; 19:1677-1689. [PMID: 33179701 DOI: 10.1039/d0pp00304b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The authors took an independent and closer look at the family of red-emitting rhodamine dyes known for a decade due to their excellent performance in STED microscopy. After the family was further extended, the true grounds of this performance became clear. Small-molecule protective agents and/or auxiliary groups were attached at two different sites of the dye's scaffold. Thus, a rhodamine core, which is already quite photostable as it is, and an intramolecular stabilizer - a 4-nitrobenzyl or a 4-nitrobenzylthio group were combined to give potentially "everlasting dyes". The fluorescence quantum yields (Φf) and the fluorescence lifetimes (τ) of the modified dyes were thoroughly measured with comparison to those of the parent dyes. The correlation of their STED performance with photostability and fluorescence color stability under illumination in water were explored. Unexpectedly, the anaerobic GSDIM (GOC) buffer proved unhelpful with respect to STED performance. It was demonstrated that, even dyes with a Φf of only 14-17% allow STED imaging with a sufficient photon budget and good signal-to-noise ratio. For the dyes with photostabilizing groups (PSG) the Φf values are 4-5 times lower than in the reference dyes, and lifetimes τ are also strongly reduced. Noteworthy are very high fluorescence color stability and constant or even increasing fluorescence signal under photobleaching in bulk aqueous solutions, which suggests a sacrificing role of the 4-nitrobenzyl-containing moieties. Straightforward and improved recipes for "last-minute" modifications and preparations of "self-healing" red-emitting fluorescent tags are described.
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Affiliation(s)
- Kirill Kolmakov
- glyXera GmbH, Brenneckestraße 20 * ZENIT II/Haus 66, D-39120 Magdeburg, Germany.
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17
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Gidi Y, Payne L, Glembockyte V, Michie MS, Schnermann MJ, Cosa G. Unifying Mechanism for Thiol-Induced Photoswitching and Photostability of Cyanine Dyes. J Am Chem Soc 2020; 142:12681-12689. [PMID: 32594743 DOI: 10.1021/jacs.0c03786] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Cyanines (Cy3, Cy5, Cy3B) are the most utilized dyes for single-molecule fluorescence and localization-based super-resolution imaging. These modalities exploit cyanines' versatile photochemical behavior with thiols. A mechanism reconciling seemingly divergent results and enabling control over cyanine photoreactivity is however missing. Utilizing single-molecule fluorescence on Cy5 and Cy5B, transient-absorption spectroscopy, and DFT modeling on a range of cyanine dyes, herein we show that photoinduced electron transfer (PeT) from a thiolate to Cy in their triplet excited state and then triplet-to-singlet intersystem crossing in the nascent geminate radical pair are crucial steps. Next, a bifurcation occurs, yielding either back electron transfer and regeneration of ground state Cy, required for photostabilization, or Cy-thiol adduct formation, necessary for super-resolution microscopy. Cy regeneration via photoinduced thiol elimination is favored by adduct absorption spectra broadening. Elimination is also shown to occur through an acid-catalyzed reaction. Overall, our work provides a roadmap for designing fluorophores, photoswitching agents, and triplet excited state quenchers for single-molecule and super-resolution imaging.
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Affiliation(s)
- Yasser Gidi
- Department of Chemistry and Quebec Center for Advanced Materials (QCAM), McGill University, 801 Sherbrooke Street West, Montreal, QC H3A 0B8, Canada
| | - Liam Payne
- Department of Chemistry and Quebec Center for Advanced Materials (QCAM), McGill University, 801 Sherbrooke Street West, Montreal, QC H3A 0B8, Canada
| | - Viktorija Glembockyte
- Department of Chemistry and Quebec Center for Advanced Materials (QCAM), McGill University, 801 Sherbrooke Street West, Montreal, QC H3A 0B8, Canada
| | - Megan S Michie
- Laboratory of Chemical Biology, NIH/NCI/CCR, 376 Boyles Street, Frederick, Maryland 21702, United States
| | - Martin J Schnermann
- Laboratory of Chemical Biology, NIH/NCI/CCR, 376 Boyles Street, Frederick, Maryland 21702, United States
| | - Gonzalo Cosa
- Department of Chemistry and Quebec Center for Advanced Materials (QCAM), McGill University, 801 Sherbrooke Street West, Montreal, QC H3A 0B8, Canada
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18
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Isselstein M, Zhang L, Glembockyte V, Brix O, Cosa G, Tinnefeld P, Cordes T. Self-Healing Dyes-Keeping the Promise? J Phys Chem Lett 2020; 11:4462-4480. [PMID: 32401520 DOI: 10.1021/acs.jpclett.9b03833] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Self-healing dyes have emerged as a new promising class of fluorescent labels. They consist of two units, a fluorescent dye and a photostabilizer. The latter heals whenever the fluorescent dye is in danger of taking a reaction pathway toward photobleaching. We describe the underlying concepts and summarize the developmental history and state-of-the-art, including latest applications in high-resolution microscopy, live-cell, and single-molecule imaging. We further discuss remaining limitations, which are (i) lower photostabilization of most self-healing dyes when compared to solution additives, (ii) limited mechanistic understanding on the influence of the biochemical environment and molecular oxygen on self-healing, and (iii) the lack of cheap and facile bioconjugation strategies. Finally, we provide ideas on how to further advance self-healing dyes, show new data on redox blinking caused by double-stranded DNA, and highlight forthcoming work on intramolecular photostabilization of fluorescent proteins.
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Affiliation(s)
- Michael Isselstein
- Physical and Synthetic Biology, Faculty of Biology, Ludwig-Maximilians-Universität München, Großhadernerstr. 2-4, 82152 Planegg-Martinsried, Germany
| | - Lei Zhang
- Physical and Synthetic Biology, Faculty of Biology, Ludwig-Maximilians-Universität München, Großhadernerstr. 2-4, 82152 Planegg-Martinsried, Germany
| | - Viktorija Glembockyte
- Department of Chemistry and Center for NanoScience, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, Haus E 81377 München, Germany
- Department of Chemistry and Quebec Centre for Applied Materials (QCAM), McGill University, 801 Sherbrooke Street W., H3A 0B8 Montreal, Quebec, Canada
| | - Oliver Brix
- Physical and Synthetic Biology, Faculty of Biology, Ludwig-Maximilians-Universität München, Großhadernerstr. 2-4, 82152 Planegg-Martinsried, Germany
| | - Gonzalo Cosa
- Department of Chemistry and Quebec Centre for Applied Materials (QCAM), McGill University, 801 Sherbrooke Street W., H3A 0B8 Montreal, Quebec, Canada
| | - Philip Tinnefeld
- Department of Chemistry and Center for NanoScience, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, Haus E 81377 München, Germany
| | - Thorben Cordes
- Physical and Synthetic Biology, Faculty of Biology, Ludwig-Maximilians-Universität München, Großhadernerstr. 2-4, 82152 Planegg-Martinsried, Germany
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19
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Grabenhorst L, Trofymchuk K, Steiner F, Glembockyte V, Tinnefeld P. Fluorophore photostability and saturation in the hotspot of DNA origami nanoantennas. Methods Appl Fluoresc 2020; 8:024003. [DOI: 10.1088/2050-6120/ab6ac8] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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20
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Karlsson JKG, Laude A, Hall MJ, Harriman A. Photo-isomerization of the Cyanine Dye Alexa-Fluor 647 (AF-647) in the Context of dSTORM Super-Resolution Microscopy. Chemistry 2019; 25:14983-14998. [PMID: 31515919 DOI: 10.1002/chem.201904117] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Indexed: 02/06/2023]
Abstract
Cyanine dyes, as used in super-resolution fluorescence microscopy, undergo light-induced "blinking", enabling localization of fluorophores with spatial resolution beyond the optical diffraction limit. Despite a plethora of studies, the molecular origins of this blinking are not well understood. Here, we examine the photophysical properties of a bio-conjugate cyanine dye (AF-647), used extensively in dSTORM imaging. In the absence of a potent sacrificial reductant, light-induced electron transfer and intermediates formed via the metastable, triplet excited state are considered unlikely to play a significant role in the blinking events. Instead, it is found that, under conditions appropriate to dSTORM microscopy, AF-647 undergoes reversible photo-induced isomerization to at least two long-lived dark species. These photo-isomers are characterized spectroscopically and their interconversion probed by computational means. The first-formed isomer is light sensitive and transforms to a longer-lived species in modest yield that could be involved in dSTORM related blinking. Permanent photobleaching of AF-647 occurs with very low quantum yield and is partially suppressed by the anaerobic redox buffer.
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Affiliation(s)
- Joshua K G Karlsson
- Molecular Photonics Laboratory, SNES, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - Alex Laude
- Bio-Imaging Unit, Medical School, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - Michael J Hall
- School of Natural and Environmental Sciences, Bedson Building, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - Anthony Harriman
- Molecular Photonics Laboratory, SNES, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
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21
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Smit JH, van der Velde JHM, Huang J, Trauschke V, Henrikus SS, Chen S, Eleftheriadis N, Warszawik EM, Herrmann A, Cordes T. On the impact of competing intra- and intermolecular triplet-state quenching on photobleaching and photoswitching kinetics of organic fluorophores. Phys Chem Chem Phys 2019; 21:3721-3733. [PMID: 30499568 DOI: 10.1039/c8cp05063e] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
While buffer cocktails remain the most commonly used method for photostabilization and photoswitching of fluorescent markers, intramolecular triplet-state quenchers emerge as an alternative strategy to impart fluorophores with 'self-healing' or even functional properties such as photoswitching. In this contribution, we evaluated combinations of both approaches and show that inter- and intramolecular triplet-state quenching processes compete with each other. We find that although the rate of triplet-state quenching is additive, the photostability is limited by the faster pathway. Often intramolecular processes dominate the photophysical situation for combinations of covalently-linked and solution-based photostabilizers and photoswitching agents. Furthermore we show that intramolecular photostabilizers can protect fluorophores from reversible off-switching events caused by solution-additives, which was previously misinterpreted as photobleaching. Our studies also provide practical guidance for usage of photostabilizer-dye conjugates for STORM-type super-resolution microscopy permitting the exploitation of their improved photophysics for increased spatio-temporal resolution. Finally, we provide evidence that the biochemical environment, e.g., proximity of aromatic amino-acids such as tryptophan, reduces the photostabilization efficiency of commonly used buffer cocktails. Not only have our results important implications for a deeper mechanistic understanding of self-healing dyes, but they will provide a general framework to select label positions for optimal and reproducible photostability or photoswitching kinetics in different biochemical environments.
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Affiliation(s)
- Jochem H Smit
- Molecular Microscopy Research Group, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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22
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Wang L, Frei MS, Salim A, Johnsson K. Small-Molecule Fluorescent Probes for Live-Cell Super-Resolution Microscopy. J Am Chem Soc 2019; 141:2770-2781. [PMID: 30550714 DOI: 10.1021/jacs.8b11134] [Citation(s) in RCA: 275] [Impact Index Per Article: 55.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Super-resolution fluorescence microscopy is a powerful tool to visualize biomolecules and cellular structures at the nanometer scale. Employing these techniques in living cells has opened up the possibility to study dynamic processes with unprecedented spatial and temporal resolution. Different physical approaches to super-resolution microscopy have been introduced over the last years. A bottleneck to apply these approaches for live-cell imaging has become the availability of appropriate fluorescent probes that can be specifically attached to biomolecules. In this Perspective, we discuss the role of small-molecule fluorescent probes for live-cell super-resolution microscopy and the challenges that need to be overcome for their generation. Recent trends in the development of labeling strategies are reviewed together with the required chemical and spectroscopic properties of the probes. Finally, selected examples of the use of small-molecule fluorescent probes in live-cell super-resolution microscopy are given.
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Affiliation(s)
- Lu Wang
- Department of Chemical Biology , Max Planck Institute for Medical Research , Jahnstrasse 29 , 69120 Heidelberg , Germany
| | - Michelle S Frei
- Department of Chemical Biology , Max Planck Institute for Medical Research , Jahnstrasse 29 , 69120 Heidelberg , Germany.,Institute of Chemical Sciences and Engineering (ISIC), École Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne , Switzerland
| | - Aleksandar Salim
- Department of Chemical Biology , Max Planck Institute for Medical Research , Jahnstrasse 29 , 69120 Heidelberg , Germany.,Institute of Chemical Sciences and Engineering (ISIC), École Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne , Switzerland
| | - Kai Johnsson
- Department of Chemical Biology , Max Planck Institute for Medical Research , Jahnstrasse 29 , 69120 Heidelberg , Germany.,Institute of Chemical Sciences and Engineering (ISIC), École Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne , Switzerland
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23
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Glembockyte V, Wieneke R, Gatterdam K, Gidi Y, Tampé R, Cosa G. Tris-N-Nitrilotriacetic Acid Fluorophore as a Self-Healing Dye for Single-Molecule Fluorescence Imaging. J Am Chem Soc 2018; 140:11006-11012. [DOI: 10.1021/jacs.8b04681] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Viktorija Glembockyte
- Department of Chemistry and Quebec Centre for Applied Materials (QCAM), McGill University, 801 Sherbrooke Street W., H3A 0B8 Montreal, Quebec, Canada
| | - Ralph Wieneke
- Institute of Biochemistry, Biocenter, and Cluster of Excellence − Macromolecular Complexes, Goethe University Frankfurt, Max-von-Laue-Str. 9, 60438 Frankfurt/M., Germany
| | - Karl Gatterdam
- Institute of Biochemistry, Biocenter, and Cluster of Excellence − Macromolecular Complexes, Goethe University Frankfurt, Max-von-Laue-Str. 9, 60438 Frankfurt/M., Germany
| | - Yasser Gidi
- Department of Chemistry and Quebec Centre for Applied Materials (QCAM), McGill University, 801 Sherbrooke Street W., H3A 0B8 Montreal, Quebec, Canada
| | - Robert Tampé
- Institute of Biochemistry, Biocenter, and Cluster of Excellence − Macromolecular Complexes, Goethe University Frankfurt, Max-von-Laue-Str. 9, 60438 Frankfurt/M., Germany
| | - Gonzalo Cosa
- Department of Chemistry and Quebec Centre for Applied Materials (QCAM), McGill University, 801 Sherbrooke Street W., H3A 0B8 Montreal, Quebec, Canada
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24
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Golec B, Nawara K, Gorski A, Thummel RP, Herbich J, Waluk J. Combined effect of hydrogen bonding interactions and freezing of rotameric equilibrium on the enhancement of photostability. Phys Chem Chem Phys 2018; 20:13306-13315. [DOI: 10.1039/c8cp00726h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Rigid structure and hydrogen-bonding interactions provide a higher photostability of organic chromophores.
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Affiliation(s)
- Barbara Golec
- Institute of Physical Chemistry
- Polish Academy of Sciences
- 01-224 Warsaw
- Poland
| | - Krzysztof Nawara
- Faculty of Mathematics and Natural Sciences
- College of Science
- Cardinal Stefan Wyszyński University
- 01-815 Warsaw
- Poland
| | - Alexandr Gorski
- Institute of Physical Chemistry
- Polish Academy of Sciences
- 01-224 Warsaw
- Poland
| | | | - Jerzy Herbich
- Institute of Physical Chemistry
- Polish Academy of Sciences
- 01-224 Warsaw
- Poland
| | - Jacek Waluk
- Institute of Physical Chemistry
- Polish Academy of Sciences
- 01-224 Warsaw
- Poland
- Faculty of Mathematics and Natural Sciences
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25
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Zhao Y, Duan R, Zhao J, Li C. Spin–orbit charge transfer intersystem crossing in perylenemonoimide–phenothiazine compact electron donor–acceptor dyads. Chem Commun (Camb) 2018; 54:12329-12332. [DOI: 10.1039/c8cc07012a] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Efficient triplet excited state production (57%) was observed for perylenemonoimide–phenothiazine compact electron donor–acceptor dyads based on spin–orbit charge transfer ISC.
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Affiliation(s)
- Yingjie Zhao
- State Key Laboratory of Fine Chemicals
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Ruomeng Duan
- School of Environment and Civil Engineering
- Dongguan University of Technology
- Dongguan
- P. R. China
| | - Jianzhang Zhao
- State Key Laboratory of Fine Chemicals
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Chen Li
- School of Environment and Civil Engineering
- Dongguan University of Technology
- Dongguan
- P. R. China
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26
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Glembockyte V, Cosa G. Redox-Based Photostabilizing Agents in Fluorescence Imaging: The Hidden Role of Intersystem Crossing in Geminate Radical Ion Pairs. J Am Chem Soc 2017; 139:13227-13233. [DOI: 10.1021/jacs.7b08134] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Viktorija Glembockyte
- Department of Chemistry and
Center for Self-Assembled Chemical Structures, McGill University, 801
Sherbrooke Street West, Montréal, Québec H3A 0B8, Canada
| | - Gonzalo Cosa
- Department of Chemistry and
Center for Self-Assembled Chemical Structures, McGill University, 801
Sherbrooke Street West, Montréal, Québec H3A 0B8, Canada
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