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Markovic A, Buschbeck L, Klüner T, Christoffers J, Wittstock G. Electron Transfer and Electron Excitation Processes in 2,5-Diaminoterephthalate Derivatives with Broad Scope for Functionalization. ChemistryOpen 2019; 8:1176-1182. [PMID: 31497472 PMCID: PMC6718077 DOI: 10.1002/open.201900138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Indexed: 12/15/2022] Open
Abstract
Derivatives of 2,5-diaminoterephthalate (DAT) are efficient fluorescence dyes that are also redox-active, thus allowing for the electrochemical manipulation of spectral properties. The electrochemical behaviour of seven DAT derivatives was studied by cyclic voltammetry in dichloromethane. In the absence of a proton donor, DATs should be oxidized in two one-electron steps. The first step is usually quasi-reversible while the second step is either quasi-reversible or irreversible. Some electrochemical properties such as the formal potentials and the ratio between the anodic and the cathodic current were determined from the cyclic voltammograms. Correlation between the formal potential of first oxidation and the absorption or the fluorescence emission wavelengths are established for this specific type of dyes. These correlations were confirmed with density functional theory calculations.
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Affiliation(s)
- Aleksandra Markovic
- Carl von Ossietzky University OldenburgSchool of Mathematics and Science, Chemistry DepartmentD-26111OldenburgGermany
| | - Leon Buschbeck
- Carl von Ossietzky University OldenburgSchool of Mathematics and Science, Chemistry DepartmentD-26111OldenburgGermany
| | - Thorsten Klüner
- Carl von Ossietzky University OldenburgSchool of Mathematics and Science, Chemistry DepartmentD-26111OldenburgGermany
| | - Jens Christoffers
- Carl von Ossietzky University OldenburgSchool of Mathematics and Science, Chemistry DepartmentD-26111OldenburgGermany
| | - Gunther Wittstock
- Carl von Ossietzky University OldenburgSchool of Mathematics and Science, Chemistry DepartmentD-26111OldenburgGermany
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2
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Christoffers J. Diaminoterephthalate Fluorescence Dyes - Versatile Tools for Life Sciences and Materials Science. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701447] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Jens Christoffers
- Institut für Chemie; Carl von Ossietzky Universität Oldenburg; 26111 Oldenburg Germany
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3
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Yang ST, Lim SI, Kiessling V, Kwon I, Tamm LK. Site-specific fluorescent labeling to visualize membrane translocation of a myristoyl switch protein. Sci Rep 2016; 6:32866. [PMID: 27605302 PMCID: PMC5015116 DOI: 10.1038/srep32866] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Accepted: 08/16/2016] [Indexed: 12/20/2022] Open
Abstract
Fluorescence approaches have been widely used for elucidating the dynamics of protein-membrane interactions in cells and model systems. However, non-specific multi-site fluorescent labeling often results in a loss of native structure and function, and single cysteine labeling is not feasible when native cysteines are required to support a protein's folding or catalytic activity. Here, we develop a method using genetic incorporation of non-natural amino acids and bio-orthogonal chemistry to site-specifically label with a single fluorescent small molecule or protein the myristoyl-switch protein recoverin, which is involved in rhodopsin-mediated signaling in mammalian visual sensory neurons. We demonstrate reversible Ca(2+)-responsive translocation of labeled recoverin to membranes and show that recoverin favors membranes with negative curvature and high lipid fluidity in complex heterogeneous membranes, which confers spatio-temporal control over down-stream signaling events. The site-specific orthogonal labeling technique is promising for structural, dynamical, and functional studies of many lipid-anchored membrane protein switches.
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Affiliation(s)
- Sung-Tae Yang
- Center for Membrane and Cell Physiology, University of Virginia, Charlottesville, VA 22908, USA
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Sung In Lim
- Department of Chemical Engineering, University of Virginia, Charlottesville, VA 22904, USA
| | - Volker Kiessling
- Center for Membrane and Cell Physiology, University of Virginia, Charlottesville, VA 22908, USA
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Inchan Kwon
- Department of Chemical Engineering, University of Virginia, Charlottesville, VA 22904, USA
- School of Materials Science and Engineering, and Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
| | - Lukas K. Tamm
- Center for Membrane and Cell Physiology, University of Virginia, Charlottesville, VA 22908, USA
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
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4
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Potvin-Fournier K, Lefèvre T, Picard-Lafond A, Marcotte C, Dufresne C, Cantin L, Salesse C, Auger M. Discriminating Lipid– from Protein–Calcium Binding To Understand the Interaction between Recoverin and Phosphatidylglycerol Model Membranes. Biochemistry 2016; 55:3481-91. [DOI: 10.1021/acs.biochem.6b00408] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Kim Potvin-Fournier
- Département
de chimie, Regroupement québécois de recherche sur la
fonction, l’ingénierie et les applications des protéines
(PROTEO), Centre de recherche sur les matériaux avancés
(CERMA), Centre québécois sur les matériaux fonctionnels
(CQMF), Université Laval, Pavillon Alexandre-Vachon, 1045
avenue de la médecine, Québec, Québec G1V 0A6, Canada
- CUO-recherche,
Centre de recherche du CHU de Québec, Hôpital du Saint-Sacrement,
Département d’ophtalmologie, Faculté de médecine,
PROTEO, Université Laval, Québec, Québec G1S 4L8, Canada
| | - Thierry Lefèvre
- Département
de chimie, Regroupement québécois de recherche sur la
fonction, l’ingénierie et les applications des protéines
(PROTEO), Centre de recherche sur les matériaux avancés
(CERMA), Centre québécois sur les matériaux fonctionnels
(CQMF), Université Laval, Pavillon Alexandre-Vachon, 1045
avenue de la médecine, Québec, Québec G1V 0A6, Canada
| | - Audrey Picard-Lafond
- Département
de chimie, Regroupement québécois de recherche sur la
fonction, l’ingénierie et les applications des protéines
(PROTEO), Centre de recherche sur les matériaux avancés
(CERMA), Centre québécois sur les matériaux fonctionnels
(CQMF), Université Laval, Pavillon Alexandre-Vachon, 1045
avenue de la médecine, Québec, Québec G1V 0A6, Canada
| | - Catherine Marcotte
- Département
de chimie, Regroupement québécois de recherche sur la
fonction, l’ingénierie et les applications des protéines
(PROTEO), Centre de recherche sur les matériaux avancés
(CERMA), Centre québécois sur les matériaux fonctionnels
(CQMF), Université Laval, Pavillon Alexandre-Vachon, 1045
avenue de la médecine, Québec, Québec G1V 0A6, Canada
| | - Caroline Dufresne
- Département
de chimie, Regroupement québécois de recherche sur la
fonction, l’ingénierie et les applications des protéines
(PROTEO), Centre de recherche sur les matériaux avancés
(CERMA), Centre québécois sur les matériaux fonctionnels
(CQMF), Université Laval, Pavillon Alexandre-Vachon, 1045
avenue de la médecine, Québec, Québec G1V 0A6, Canada
| | - Line Cantin
- CUO-recherche,
Centre de recherche du CHU de Québec, Hôpital du Saint-Sacrement,
Département d’ophtalmologie, Faculté de médecine,
PROTEO, Université Laval, Québec, Québec G1S 4L8, Canada
| | - Christian Salesse
- CUO-recherche,
Centre de recherche du CHU de Québec, Hôpital du Saint-Sacrement,
Département d’ophtalmologie, Faculté de médecine,
PROTEO, Université Laval, Québec, Québec G1S 4L8, Canada
| | - Michèle Auger
- Département
de chimie, Regroupement québécois de recherche sur la
fonction, l’ingénierie et les applications des protéines
(PROTEO), Centre de recherche sur les matériaux avancés
(CERMA), Centre québécois sur les matériaux fonctionnels
(CQMF), Université Laval, Pavillon Alexandre-Vachon, 1045
avenue de la médecine, Québec, Québec G1V 0A6, Canada
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5
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Zernii EY, Zinchenko DV, Vladimirov VI, Grigoriev II, Skorikova EE, Baksheeva VE, Lipkin VM, Philippov PP, Senin II. Ca2+-dependent regulatory activity of recoverin in photoreceptor raft structures: The role of caveolin-1. BIOCHEMISTRY MOSCOW SUPPLEMENT SERIES A-MEMBRANE AND CELL BIOLOGY 2014. [DOI: 10.1134/s1990747813050255] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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6
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Ranaghan MJ, Kumar RP, Chakrabarti KS, Buosi V, Kern D, Oprian DD. A highly conserved cysteine of neuronal calcium-sensing proteins controls cooperative binding of Ca2+ to recoverin. J Biol Chem 2013; 288:36160-7. [PMID: 24189072 DOI: 10.1074/jbc.m113.524355] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Recoverin, a 23-kDa Ca(2+)-binding protein of the neuronal calcium sensing (NCS) family, inhibits rhodopsin kinase, a Ser/Thr kinase responsible for termination of photoactivated rhodopsin in rod photoreceptor cells. Recoverin has two functional EF hands and a myristoylated N terminus. The myristoyl chain imparts cooperativity to the Ca(2+)-binding sites through an allosteric mechanism involving a conformational equilibrium between R and T states of the protein. Ca(2+) binds preferentially to the R state; the myristoyl chain binds preferentially to the T state. In the absence of myristoylation, the R state predominates, and consequently, binding of Ca(2+) to the non-myristoylated protein is not cooperative. We show here that a mutation, C39A, of a highly conserved Cys residue among NCS proteins, increases the apparent cooperativity for binding of Ca(2+) to non-myristoylated recoverin. The binding data can be explained by an effect on the T/R equilibrium to favor the T state without affecting the intrinsic binding constants for the two Ca(2+) sites.
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7
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Wache N, Scholten A, Klüner T, Koch KW, Christoffers J. Turning On Fluorescence with Thiols - Synthetic and Computational Studies on Diaminoterephthalates and Monitoring the Switch of the Ca2+Sensor Recoverin. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200879] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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8
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Kollmann H, Becker SF, Shirdel J, Scholten A, Ostendorp A, Lienau C, Koch KW. Probing the Ca(2+) switch of the neuronal Ca(2+) sensor GCAP2 by time-resolved fluorescence spectroscopy. ACS Chem Biol 2012; 7:1006-14. [PMID: 22409623 DOI: 10.1021/cb3000748] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
We report fluorescence lifetime and rotational anisotropy measurements of the fluorescent dye Alexa647 attached to the guanylate cyclase-activating protein 2 (GCAP2), an intracellular myristoylated calcium sensor protein operating in photoreceptor cells. By linking the dye to different protein regions critical for monitoring calcium-induced conformational changes, we could measure fluorescence lifetimes and rotational correlation times as a function of myristoylation, calcium, and position of the attached dye, while GCAP2 was still able to regulate guanylate cyclase in a Ca(2+)-sensitive manner. We observe distinct site-specific variations in the fluorescence dynamics when externally changing the protein conformation. A clear reduction in fluorescence lifetime suggests that in the calcium-free state a dye marker in amino acid position 131 senses a more hydrophobic protein environment than in position 111. Saturating GCAP2 with calcium increases the fluorescence lifetime and hence leads to larger exposure of position 111 to the solvent and at the same time to a movement of position 131 into a hydrophobic protein cleft. In addition, we find distinct, biexponential anisotropy decays reflecting the reorientational motion of the fluorophore dipole and the dye/protein complex, respectively. Our experimental data are well described by a "wobbling-in-a-cone" model and reveal that for dye markers in position 111 of the GCAP2 protein both addition of calcium and myristoylation results in a pronounced increase in orientational flexibility of the fluorophore. Our results provide evidence that the up-and-down movement of an α-helix that is situated between position 111 and 131 is a key feature of the dynamics of the protein-dye complex. Operation of this piston-like movement is triggered by the intracellular messenger calcium.
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Affiliation(s)
- Heiko Kollmann
- Ultrafast
Nano-Optics, Institute of Physics and §Biochemistry, Institute of Biology and Environmental
Sciences, Faculty V, University of Oldenburg, D-26111 Oldenburg, Germany
- Center
of Interface Science and
- Research Center Neurosensory Science, University of Oldenburg, D-26111 Oldenburg, Germany
| | - Simon F. Becker
- Ultrafast
Nano-Optics, Institute of Physics and §Biochemistry, Institute of Biology and Environmental
Sciences, Faculty V, University of Oldenburg, D-26111 Oldenburg, Germany
- Center
of Interface Science and
- Research Center Neurosensory Science, University of Oldenburg, D-26111 Oldenburg, Germany
| | - Javid Shirdel
- Ultrafast
Nano-Optics, Institute of Physics and §Biochemistry, Institute of Biology and Environmental
Sciences, Faculty V, University of Oldenburg, D-26111 Oldenburg, Germany
- Center
of Interface Science and
- Research Center Neurosensory Science, University of Oldenburg, D-26111 Oldenburg, Germany
| | - Alexander Scholten
- Ultrafast
Nano-Optics, Institute of Physics and §Biochemistry, Institute of Biology and Environmental
Sciences, Faculty V, University of Oldenburg, D-26111 Oldenburg, Germany
- Center
of Interface Science and
- Research Center Neurosensory Science, University of Oldenburg, D-26111 Oldenburg, Germany
| | - Anna Ostendorp
- Ultrafast
Nano-Optics, Institute of Physics and §Biochemistry, Institute of Biology and Environmental
Sciences, Faculty V, University of Oldenburg, D-26111 Oldenburg, Germany
- Center
of Interface Science and
- Research Center Neurosensory Science, University of Oldenburg, D-26111 Oldenburg, Germany
| | - Christoph Lienau
- Ultrafast
Nano-Optics, Institute of Physics and §Biochemistry, Institute of Biology and Environmental
Sciences, Faculty V, University of Oldenburg, D-26111 Oldenburg, Germany
- Center
of Interface Science and
- Research Center Neurosensory Science, University of Oldenburg, D-26111 Oldenburg, Germany
| | - Karl-Wilhelm Koch
- Ultrafast
Nano-Optics, Institute of Physics and §Biochemistry, Institute of Biology and Environmental
Sciences, Faculty V, University of Oldenburg, D-26111 Oldenburg, Germany
- Center
of Interface Science and
- Research Center Neurosensory Science, University of Oldenburg, D-26111 Oldenburg, Germany
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9
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Geiger A, Russo L, Gensch T, Thestrup T, Becker S, Hopfner KP, Griesinger C, Witte G, Griesbeck O. Correlating calcium binding, Förster resonance energy transfer, and conformational change in the biosensor TN-XXL. Biophys J 2012; 102:2401-10. [PMID: 22677394 PMCID: PMC3353025 DOI: 10.1016/j.bpj.2012.03.065] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2012] [Revised: 03/21/2012] [Accepted: 03/27/2012] [Indexed: 11/23/2022] Open
Abstract
Genetically encoded calcium indicators have become instrumental in imaging signaling in complex tissues and neuronal circuits in vivo. Despite their importance, structure-function relationships of these sensors often remain largely uncharacterized due to their artificial and multimodular composition. Here, we describe a combination of protein engineering and kinetic, spectroscopic, and biophysical analysis of the Förster resonance energy transfer (FRET)-based calcium biosensor TN-XXL. Using fluorescence spectroscopy of engineered tyrosines, we show that two of the four calcium binding EF-hands dominate the FRET output of TN-XXL and that local conformational changes of these hands match the kinetics of FRET change. Using small-angle x-ray scattering and NMR spectroscopy, we show that TN-XXL changes from a flexible elongated to a rigid globular shape upon binding calcium, thus resulting in FRET signal output. Furthermore, we compare calcium titrations using fluorescence lifetime spectroscopy with the ratiometric approach and investigate potential non-FRET effects that may affect the fluorophores. Thus, our data characterize the biophysics of TN-XXL in detail and may form a basis for further rational engineering of FRET-based biosensors.
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Affiliation(s)
- Anselm Geiger
- Max-Planck-Institut für Neurobiologie, Martinsried, Germany
| | - Luigi Russo
- Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany
| | | | | | - Stefan Becker
- Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany
| | - Karl-Peter Hopfner
- Genzentrum und Department Biochemie, Ludwig-Maximilians-Universität, Munich, Germany
| | | | - Gregor Witte
- Genzentrum und Department Biochemie, Ludwig-Maximilians-Universität, Munich, Germany
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10
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Wache N, Schröder C, Koch KW, Christoffers J. Diaminoterephthalate Turn-On Fluorescence Probes for Thiols-Tagging of Recoverin and Tracking of its Conformational Change. Chembiochem 2012; 13:993-8. [DOI: 10.1002/cbic.201200027] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2012] [Indexed: 11/08/2022]
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11
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Permyakov SE, Zernii EY, Knyazeva EL, Denesyuk AI, Nazipova AA, Kolpakova TV, Zinchenko DV, Philippov PP, Permyakov EA, Senin II. Oxidation mimicking substitution of conservative cysteine in recoverin suppresses its membrane association. Amino Acids 2011; 42:1435-42. [PMID: 21344177 DOI: 10.1007/s00726-011-0843-0] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2010] [Accepted: 02/03/2011] [Indexed: 11/26/2022]
Abstract
Recoverin belongs to the family of intracellular Ca(2+)-binding proteins containing EF-hand domains, neuronal calcium sensors (NCS). In photoreceptor outer segments, recoverin is involved into the recovery of visual cycle via Ca(2+)-dependent interaction with disk membranes and inhibition of rhodopsin kinase. The function of a conservative within NCS family Cys residue in the inactive EF-loop 1 remains unclear, but previous study has shown its vulnerability to oxidation under mild oxidizing conditions. To elucidate the influence of oxidation of the conservative Cys39 in recoverin the properties of its C39D mutant, mimicking oxidative conversion of Cys39 into sulfenic, sulfinic or sulfonic acids have been studied using intrinsic fluorescence, circular dichroism, and equilibrium centrifugation methods. The C39D substitution results in essential changes in structural, physico-chemical and physiological properties of the protein: it reduces α-helical content, decreases thermal stability and suppresses protein affinity for photoreceptor membranes. The latter effect precludes proper functioning of the Ca(2+)-myristoyl switch in recoverin. The revealed significance of oxidation state of Cys39 for maintaining the protein functional status shows that it may serve as redox sensor in vision and suggests an explanation of the available data on localization and light-dependent translocation of recoverin in rod photoreceptors.
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Affiliation(s)
- Sergei E Permyakov
- Institute for Biological Instrumentation of Russian Academy of Sciences, Pushchino, Moscow Region, 142290, Russia
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12
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Rich RL, Myszka DG. Survey of the year 2007 commercial optical biosensor literature. J Mol Recognit 2008; 21:355-400. [DOI: 10.1002/jmr.928] [Citation(s) in RCA: 144] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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