51
|
Kubicki DJ, Casano G, Schwarzwälder M, Abel S, Sauvée C, Ganesan K, Yulikov M, Rossini AJ, Jeschke G, Copéret C, Lesage A, Tordo P, Ouari O, Emsley L. Rational design of dinitroxide biradicals for efficient cross-effect dynamic nuclear polarization. Chem Sci 2015; 7:550-558. [PMID: 29896347 PMCID: PMC5952883 DOI: 10.1039/c5sc02921j] [Citation(s) in RCA: 113] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Accepted: 10/12/2015] [Indexed: 12/27/2022] Open
Abstract
A series of 37 dinitroxide biradicals have been prepared and their performance studied as polarizing agents in cross-effect DNP NMR experiments at 9.4 T and 100 K in 1,1,2,2-tetrachloroethane (TCE). We observe that in this regime the DNP performance is strongly correlated with the substituents on the polarizing agents, and electron and nuclear spin relaxation times, with longer relaxation times leading to better enhancements. We also observe that deuteration of the radicals generally leads to better DNP enhancement but with longer build-up time. One of the new radicals introduced here provides the best performance obtained so far under these conditions.
Collapse
Affiliation(s)
- Dominik J Kubicki
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland .
| | - Gilles Casano
- Aix-Marseille Université , CNRS , ICR UMR 7273 , 13397 Marseille , France . ;
| | - Martin Schwarzwälder
- ETH Zurich , Department of Chemistry, Laboratory of Inorganic Chemistry , 8093 Zurich , Switzerland
| | - Sébastien Abel
- Aix-Marseille Université , CNRS , ICR UMR 7273 , 13397 Marseille , France . ;
| | - Claire Sauvée
- Aix-Marseille Université , CNRS , ICR UMR 7273 , 13397 Marseille , France . ;
| | - Karthikeyan Ganesan
- Aix-Marseille Université , CNRS , ICR UMR 7273 , 13397 Marseille , France . ;
| | - Maxim Yulikov
- ETH Zurich , Department of Chemistry, Laboratory of Inorganic Chemistry , 8093 Zurich , Switzerland
| | - Aaron J Rossini
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland .
| | - Gunnar Jeschke
- ETH Zurich , Department of Chemistry, Laboratory of Inorganic Chemistry , 8093 Zurich , Switzerland
| | - Christophe Copéret
- ETH Zurich , Department of Chemistry, Laboratory of Inorganic Chemistry , 8093 Zurich , Switzerland
| | - Anne Lesage
- Université de Lyon , Institut de Sciences Analytiques (CNRS / ENS de Lyon / UCB-Lyon 1) , Centre de RMN à Très Hauts Champs , 69100 Villeurbanne , France
| | - Paul Tordo
- Aix-Marseille Université , CNRS , ICR UMR 7273 , 13397 Marseille , France . ;
| | - Olivier Ouari
- Aix-Marseille Université , CNRS , ICR UMR 7273 , 13397 Marseille , France . ;
| | - Lyndon Emsley
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland .
| |
Collapse
|
52
|
Garbuio L, Zimmermann K, Häussinger D, Yulikov M. Gd(III) complexes for electron-electron dipolar spectroscopy: Effects of deuteration, pH and zero field splitting. J Magn Reson 2015; 259:163-73. [PMID: 26342680 DOI: 10.1016/j.jmr.2015.08.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 08/06/2015] [Accepted: 08/07/2015] [Indexed: 05/15/2023]
Abstract
Spectral parameters of Gd(III) complexes are intimately linked to the performance of the Gd(III)-nitroxide or Gd(III)-Gd(III) double electron-electron resonance (DEER or PELDOR) techniques, as well as to that of relaxation induced dipolar modulation enhancement (RIDME) spectroscopy with Gd(III) ions. These techniques are of interest for applications in structural biology, since they can selectively detect site-to-site distances in biomolecules or biomolecular complexes in the nanometer range. Here we report relaxation properties, echo detected EPR spectra, as well as the magnitude of the echo reduction effect in Gd(III)-nitroxide DEER for a series of Gadolinium(III) complexes with chelating agents derived from tetraazacyclododecane. We observed that solvent deuteration does not only lengthen the relaxation times of Gd(III) centers but also weakens the DEER echo reduction effect. Both of these phenomena lead to an improved signal-to-noise ratios or, alternatively, longer accessible distance range in pulse EPR measurements. The presented data enrich the knowledge on paramagnetic Gd(III) chelate complexes in frozen solutions, and can help optimize the experimental conditions for most types of the pulse measurements of the electron-electron dipolar interactions.
Collapse
Affiliation(s)
- Luca Garbuio
- Laboratory of Physical Chemistry, ETH Zurich, Zurich, Switzerland
| | | | | | - Maxim Yulikov
- Laboratory of Physical Chemistry, ETH Zurich, Zurich, Switzerland.
| |
Collapse
|
53
|
Affiliation(s)
- Hongfei Liu
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Mauro Schilling
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Maxim Yulikov
- Laboratory
of Physical Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 2, CH-8093 Zurich, Switzerland
| | - Sandra Luber
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Greta R. Patzke
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| |
Collapse
|
54
|
Garbuio L, Lewandowski B, Wilhelm P, Ziegler L, Yulikov M, Wennemers H, Jeschke G. Shape Persistence of Polyproline II Helical Oligoprolines. Chemistry 2015; 21:10747-53. [PMID: 26089127 DOI: 10.1002/chem.201501190] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Indexed: 11/06/2022]
Abstract
Oligoprolines are commonly used as molecular scaffolds. Past studies on the persistence length of their secondary structure, the polyproline II (PPII) helix, and on the fraction of backbone cis amide bonds have provided conflicting results. We resolved this debate by studying a series of spin-labeled proline octadecamers with EPR spectroscopy. Distance distributions between an N-terminal Gd(III) -DOTA (DOTA=1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid) label and a nitroxide label at one of five evenly spaced backbone sites allowed us to discriminate between the flexibility of the PPII helix and the cis amide contributions. An upper limit of 2 % cis amide bonds per residue was found in a 7:3 (v/v) water/glycerol mixture, whereas cis amides were not observed in trifluoroethanol. Extrapolation of Monte Carlo models from the glass transition to ambient temperature predicts a persistence length of ≈3-3.5 nm in both solvents. The method is generally applicable to any type of oligomer for which the persistence length is of interest.
Collapse
Affiliation(s)
- Luca Garbuio
- ETH Zurich, Department of Chemistry and Applied Bioscience, Laboratory of Physical Chemistry, Vladimir Prelog Weg 2, 8093, Zurich (Switzerland)
| | - Bartosz Lewandowski
- ETH Zurich, Department of Chemistry and Applied Bioscience, Laboratory of Organic Chemistry, Vladimir Prelog Weg 3, 8093, Zurich (Switzerland)
| | - Patrick Wilhelm
- ETH Zurich, Department of Chemistry and Applied Bioscience, Laboratory of Organic Chemistry, Vladimir Prelog Weg 3, 8093, Zurich (Switzerland)
| | - Ludmila Ziegler
- ETH Zurich, Department of Chemistry and Applied Bioscience, Laboratory of Organic Chemistry, Vladimir Prelog Weg 3, 8093, Zurich (Switzerland)
| | - Maxim Yulikov
- ETH Zurich, Department of Chemistry and Applied Bioscience, Laboratory of Physical Chemistry, Vladimir Prelog Weg 2, 8093, Zurich (Switzerland).
| | - Helma Wennemers
- ETH Zurich, Department of Chemistry and Applied Bioscience, Laboratory of Organic Chemistry, Vladimir Prelog Weg 3, 8093, Zurich (Switzerland).
| | - Gunnar Jeschke
- ETH Zurich, Department of Chemistry and Applied Bioscience, Laboratory of Physical Chemistry, Vladimir Prelog Weg 2, 8093, Zurich (Switzerland).
| |
Collapse
|
55
|
Fontes A, Karimi S, Helm L, Yulikov M, Ferreira PM, André JP. Dinuclear DOTA-Based GdIIIChelates - Revisiting a Straightforward Strategy for Relaxivity Improvement. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201403159] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
56
|
Doll A, Qi M, Pribitzer S, Wili N, Yulikov M, Godt A, Jeschke G. Sensitivity enhancement by population transfer in Gd(iii) spin labels. Phys Chem Chem Phys 2015; 17:7334-44. [DOI: 10.1039/c4cp05893c] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Frequency-swept chirp pulses with bandwidths > 1 GHz rearrange electron spin populations in the S = 7/2 spin of Gd(iii) ions for better sensitivity, as demonstrated with distance measurements between Gd(iii) ions.
Collapse
Affiliation(s)
- Andrin Doll
- Laboratory of Physical Chemistry
- ETH Zurich
- 8093 Zurich
- Switzerland
| | - Mian Qi
- Faculty of Chemistry and Center for Molecular Materials
- Bielefeld University
- 33615 Bielefeld
- Germany
| | | | - Nino Wili
- Laboratory of Physical Chemistry
- ETH Zurich
- 8093 Zurich
- Switzerland
| | - Maxim Yulikov
- Laboratory of Physical Chemistry
- ETH Zurich
- 8093 Zurich
- Switzerland
| | - Adelheid Godt
- Faculty of Chemistry and Center for Molecular Materials
- Bielefeld University
- 33615 Bielefeld
- Germany
| | - Gunnar Jeschke
- Laboratory of Physical Chemistry
- ETH Zurich
- 8093 Zurich
- Switzerland
| |
Collapse
|
57
|
Abstract
The relaxation induced dipolar modulation enhancement (RIDME) technique is applied at W-band microwave frequencies around 94 GHz to a pair of Gd(III) complexes that are connected by a rodlike spacer, and the extraction of the interspin distance distribution is discussed. A dipolar pattern derived from RIDME experimental data is a superposition of Pake-like dipolar patterns corresponding to the fundamental dipolar interaction and higher harmonics thereof. Intriguingly, the relative weights of the stretched patterns do not depend significantly on mixing time. As much larger modulation depths can be achieved than in double electron-electron resonance distance measurements at the same frequency, Gd(III)-Gd(III) RIDME may become attractive for structural characterization of biomacromolecules and biomolecular complexes.
Collapse
Affiliation(s)
- Sahand Razzaghi
- †Laboratory of Physical Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland
| | - Mian Qi
- ‡Faculty of Chemistry and Center for Molecular Materials, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany
| | - Anna I Nalepa
- §Max-Planck-Institut für Chemische Energiekonversion, Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
| | - Adelheid Godt
- ‡Faculty of Chemistry and Center for Molecular Materials, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany
| | - Gunnar Jeschke
- †Laboratory of Physical Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland
| | - Anton Savitsky
- §Max-Planck-Institut für Chemische Energiekonversion, Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
| | - Maxim Yulikov
- †Laboratory of Physical Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland
| |
Collapse
|
58
|
Duss O, Yulikov M, Jeschke G, Allain FHT. EPR-aided approach for solution structure determination of large RNAs or protein-RNA complexes. Nat Commun 2014; 5:3669. [PMID: 24828280 DOI: 10.1038/ncomms4669] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2014] [Accepted: 03/14/2014] [Indexed: 12/18/2022] Open
Abstract
High-resolution structural information on RNA and its functionally important complexes with proteins is dramatically underrepresented compared with proteins but is urgently needed for understanding cellular processes at the molecular and atomic level. Here we present an EPR-based protocol to help solving large RNA and protein-RNA complex structures in solution by providing long-range distance constraints between rigid fragments. Using enzymatic ligation of smaller RNA fragments, large doubly spin-labelled RNAs can be obtained permitting the acquisition of long distance distributions (>80 Å) within a large protein-RNA complex. Using a simple and fast calculation in torsion angle space of the spin-label distributions with the program CYANA, we can derive simple distance constraints between the spin labels and use them together with short-range distance restraints derived from NMR to determine the structure of a 70 kDa protein-RNA complex composed of three subcomplexes.
Collapse
Affiliation(s)
- Olivier Duss
- Institute for Molecular Biology and Biophysics, ETH Zürich, Zürich 8093, Switzerland
| | - Maxim Yulikov
- Institute for Physical Chemistry, ETH Zürich, Zürich 8093, Switzerland
| | - Gunnar Jeschke
- Institute for Physical Chemistry, ETH Zürich, Zürich 8093, Switzerland
| | - Frédéric H-T Allain
- Institute for Molecular Biology and Biophysics, ETH Zürich, Zürich 8093, Switzerland
| |
Collapse
|
59
|
Duss O, Michel E, Yulikov M, Schubert M, Jeschke G, Allain FHT. Structural basis of the non-coding RNA RsmZ acting as a protein sponge. Nature 2014; 509:588-92. [DOI: 10.1038/nature13271] [Citation(s) in RCA: 160] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2013] [Accepted: 03/24/2014] [Indexed: 01/01/2023]
|
60
|
Yulikov M. Chapter 1. Spectroscopically orthogonal spin labels and distance measurements in biomolecules. Electron Paramagnetic Resonance 2014. [DOI: 10.1039/9781782620280-00001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
61
|
Joseph B, Korkhov VM, Yulikov M, Jeschke G, Bordignon E. Conformational cycle of the vitamin B12 ABC importer in liposomes detected by double electron-electron resonance (DEER). J Biol Chem 2013; 289:3176-85. [PMID: 24362024 DOI: 10.1074/jbc.m113.512178] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Double electron-electron resonance is used here to investigate intermediates of the transport cycle of the Escherichia coli vitamin B12 ATP-binding cassette importer BtuCD-F. Previously, we showed the ATP-induced opening of the cytoplasmic gate I in TM5 helices, later confirmed by the AMP-PNP-bound BtuCD-F crystal structure. Here, other key residues are analyzed in TM10 helices (positions 307 and 322) and in the cytoplasmic gate II, i.e. the loop between TM2 and TM3 (positions 82 and 85). Without BtuF, binding of ATP induces detectable changes at positions 307 and 85 in BtuCD in liposomes. Together with BtuF, ATP triggers the closure of the cytoplasmic gate II in liposomes (reported by both positions 82 and 85). This forms a sealed cavity in the translocation channel in agreement with the AMP-PNP·BtuCD-F x-ray structure. When vitamin B12 and AMP-PNP are simultaneously present, the extent of complex formation is reduced, but the short 82-82 interspin distance detected indicates that the substrate does not affect the closed conformation of this gate. The existence of the BtuCD-F complex under these conditions is verified with spectroscopically orthogonal nitroxide and Gd(III)-based labels. The cytoplasmic gate II remains closed also in the vanadate-trapped state, but it reopens in the ADP-bound state of the complex. Therefore, we suggest that the substrate likely trapped in ATP·BtuCD-F can be released after ATP hydrolysis but before the occluded ADP-bound conformation is reached.
Collapse
Affiliation(s)
- Benesh Joseph
- From the Laboratory of Physical Chemistry, ETH Zurich, Wolfgang-Pauli-Strasse 10 and
| | | | | | | | | |
Collapse
|
62
|
Gajan D, Schwarzwälder M, Conley MP, Grüning WR, Rossini AJ, Zagdoun A, Lelli M, Yulikov M, Jeschke G, Sauvée C, Ouari O, Tordo P, Veyre L, Lesage A, Thieuleux C, Emsley L, Copéret C. Solid-phase polarization matrixes for dynamic nuclear polarization from homogeneously distributed radicals in mesostructured hybrid silica materials. J Am Chem Soc 2013; 135:15459-66. [PMID: 23978152 DOI: 10.1021/ja405822h] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Mesoporous hybrid silica-organic materials containing homogeneously distributed stable mono- or dinitroxide radicals covalently bound to the silica surface were developed as polarization matrixes for solid-state dynamic nuclear polarization (DNP) NMR experiments. For TEMPO-containing materials impregnated with water or 1,1,2,2-tetrachloroethane, enhancement factors of up to 36 were obtained at ∼100 K and 9.4 T without the need for a glass-forming additive. We show that the homogeneous radical distribution and the subtle balance between the concentration of radical in the material and the fraction of radicals at a sufficient inter-radical distance to promote the cross-effect are the main determinants for the DNP enhancements we obtain. The material, as well as an analogue containing the poorly soluble biradical bTUrea, is used as a polarizing matrix for DNP NMR experiments of solutions containing alanine and pyruvic acid. The analyte is separated from the polarization matrix by simple filtration.
Collapse
Affiliation(s)
- David Gajan
- Department of Chemistry, ETH Zürich , CH-8093 Zürich, Switzerland
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
63
|
Razzaghi S, Brooks EK, Bordignon E, Hubbell WL, Yulikov M, Jeschke G. EPR relaxation-enhancement-based distance measurements on orthogonally spin-labeled T4-lysozyme. Chembiochem 2013; 14:1883-90. [PMID: 23775845 PMCID: PMC3804414 DOI: 10.1002/cbic.201300165] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Indexed: 12/20/2022]
Abstract
Lanthanide-induced enhancement of the longitudinal relaxation of nitroxide radicals in combination with orthogonal site-directed spin labeling is presented as a systematic distance measurement method intended for studies of bio-macromolecules and bio-macromolecular complexes. The approach is tested on a water-soluble protein (T4-lysozyme) for two different commercially available lanthanide labels, and complemented by previously reported data on a membrane-inserted polypeptide. Single temperature measurements are shown to be sufficient for reliable distance determination, with an upper measurable distance limit of about 5-6 nm. The extracted averaged distances represent the closest approach in Ln(III) -nitroxide distance distributions. Studies of conformational changes and of bio-macromolecule association-dissociation are proposed as possible application area of the relaxation-enhancement-based distance measurements.
Collapse
Affiliation(s)
| | - Evan K. Brooks
- Jules Stein Eye Institute and the Department of Chemistry and Biochemistry, University of California, Los Angeles, USA
| | | | - Wayne L. Hubbell
- Jules Stein Eye Institute and the Department of Chemistry and Biochemistry, University of California, Los Angeles, USA
| | - Maxim Yulikov
- Laboratory of Physical Chemistry, ETH Zurich, Switzerland
| | - Gunnar Jeschke
- Laboratory of Physical Chemistry, ETH Zurich, Switzerland
| |
Collapse
|
64
|
Zagdoun A, Casano G, Ouari O, Schwarzwälder M, Rossini AJ, Aussenac F, Yulikov M, Jeschke G, Copéret C, Lesage A, Tordo P, Emsley L. Large molecular weight nitroxide biradicals providing efficient dynamic nuclear polarization at temperatures up to 200 K. J Am Chem Soc 2013; 135:12790-7. [PMID: 23961876 DOI: 10.1021/ja405813t] [Citation(s) in RCA: 271] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A series of seven functionalized nitroxide biradicals (the bTbK biradical and six derivatives) are investigated as exogenous polarization sources for dynamic nuclear polarization (DNP) solid-state NMR at 9.4 T and with ca. 100 K sample temperatures. The impact of electron relaxation times on the DNP enhancement (ε) is examined, and we observe that longer inversion recovery and phase memory relaxation times provide larger ε. All radicals are tested in both bulk 1,1,2,2-tetrachloroethane solutions and in mesoporous materials, and the difference in ε between the two cases is discussed. The impact of the sample temperature and magic angle spinning frequency on ε is investigated for several radicals each characterized by a range of electron relaxation times. In particular, TEKPol, a bulky derivative of bTbK with a molecular weight of 905 g·mol(-1), is presented. Its high-saturation factor makes it a very efficient polarizing agent for DNP, yielding unprecedented proton enhancements of over 200 in both bulk and materials samples at 9.4 T and 100 K. TEKPol also yields encouraging enhancements of 33 at 180 K and 12 at 200 K, suggesting that with the continued improvement of radicals large ε may be obtained at higher temperatures.
Collapse
Affiliation(s)
- Alexandre Zagdoun
- Centre de RMN à Très Hauts Champs, Institut de Sciences Analytiques, Université de Lyon (CNRS/ENS Lyon/UCB Lyon 1), 69100 Villeurbanne, France
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
65
|
Lueders P, Razzaghi S, Jäger H, Tschaggelar R, Hemminga MA, Yulikov M, Jeschke G. Distance determination from dysprosium induced relaxation enhancement: a case study on membrane-inserted WALP23 polypeptides. Mol Phys 2013. [DOI: 10.1080/00268976.2013.806683] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
|
66
|
Garbuio L, Bordignon E, Brooks EK, Hubbell WL, Jeschke G, Yulikov M. Orthogonal spin labeling and Gd(III)-nitroxide distance measurements on bacteriophage T4-lysozyme. J Phys Chem B 2013; 117:3145-53. [PMID: 23442004 DOI: 10.1021/jp401806g] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We present the first example of chemoselective site-specific spin labeling of a monomeric protein with two spectroscopically orthogonal spin labels: a gadolinium(III) chelate complex and a nitroxide radical. A detailed analysis of the performance of two commercially available Gd(III) ligands in the Gd(III)-nitroxide pulse double electron-electron resonance (DEER or PELDOR) experiment is reported. A modification of the flip angle of the pump pulse in the Gd(III)-nitroxide DEER experiment is proposed to optimize sensitivity.
Collapse
Affiliation(s)
- Luca Garbuio
- Laboratory of Physical Chemistry, ETH Zurich, Zurich, Switzerland
| | | | | | | | | | | |
Collapse
|
67
|
Lueders P, Jäger H, Hemminga MA, Jeschke G, Yulikov M. Distance Measurements on Orthogonally Spin-Labeled Membrane Spanning WALP23 Polypeptides. J Phys Chem B 2013; 117:2061-8. [DOI: 10.1021/jp311287t] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Petra Lueders
- Laboratory of Physical Chemistry, ETH Zurich, Switzerland
| | - Heidrun Jäger
- Laboratory
of Biophysics, Wageningen University, Wageningen,
The Netherlands
| | - Marcus A. Hemminga
- Laboratory
of Biophysics, Wageningen University, Wageningen,
The Netherlands
| | - Gunnar Jeschke
- Laboratory of Physical Chemistry, ETH Zurich, Switzerland
| | - Maxim Yulikov
- Laboratory of Physical Chemistry, ETH Zurich, Switzerland
| |
Collapse
|
68
|
Majano G, Ingold O, Yulikov M, Jeschke G, Pérez-Ramírez J. Room-temperature synthesis of Fe–BTC from layered iron hydroxides: the influence of precursor organisation. CrystEngComm 2013. [DOI: 10.1039/c3ce41366g] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
69
|
Lueders P, Jäger H, Hemminga MA, Jeschke G, Yulikov M. Multiple Pathway Relaxation Enhancement in the System Composed of Three Paramagnetic Species: Nitroxide Radical-Ln(3+)-O2. J Phys Chem Lett 2012; 3:1336-1340. [PMID: 26286779 DOI: 10.1021/jz300316q] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Longitudinal relaxation of nitroxide spin-labels has been measured for a membrane-incorporated α-helical polypeptide in the presence and absence of residual amounts of membrane-dissolved O2 and paramagnetic Dy(3+) ions. Such a model system, containing three different types of paramagnetic species, provides an important example of nonadditivity of two different relaxation channels for the nitroxide spins.
Collapse
Affiliation(s)
- Petra Lueders
- †Laboratory of Physical Chemistry, ETH, Zurich, Switzerland
| | - Heidrun Jäger
- ‡Laboratory of Biophysics,Wageningen University, Wageningen, The Netherlands
| | - Marcus A Hemminga
- ‡Laboratory of Biophysics,Wageningen University, Wageningen, The Netherlands
| | - Gunnar Jeschke
- †Laboratory of Physical Chemistry, ETH, Zurich, Switzerland
| | - Maxim Yulikov
- †Laboratory of Physical Chemistry, ETH, Zurich, Switzerland
| |
Collapse
|
70
|
Yulikov M, Lueders P, Farooq Warsi M, Chechik V, Jeschke G. Distance measurements in Au nanoparticles functionalized with nitroxide radicals and Gd3+–DTPA chelate complexes. Phys Chem Chem Phys 2012; 14:10732-46. [DOI: 10.1039/c2cp40282c] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
71
|
Baidya T, van Vegten N, Verel R, Jiang Y, Yulikov M, Kohn T, Jeschke G, Baiker A. SrO·Al2O3 mixed oxides: A promising class of catalysts for oxidative coupling of methane. J Catal 2011. [DOI: 10.1016/j.jcat.2011.05.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
72
|
Abstract
Electron paramagnetic resonance (EPR) spectroscopy was applied extensively in studies of nucleic acid structures and dynamics. Two modified 2'-deoxyuridine triphosphates were synthesized bearing a spin label linked to the base by a rigid linker to ensure a tight coupling of spin label dynamics. The incorporation of both spin-labeled nucleotides could be shown in primer extension reactions in presence of DNA polymerases from eukaryotic, prokaryotic, and archaic origin. In further experiments we were able to introduce multiple spin labels during primer extension reactions.
Collapse
Affiliation(s)
- Samra Obeid
- Department of Chemistry and Konstanz Research School Chemical Biology, University of Konstanz, 78457, Konstanz, Germany.
| | | | | | | |
Collapse
|
73
|
Lin X, Yang B, Benia HM, Myrach P, Yulikov M, Aumer A, Brown MA, Sterrer M, Bondarchuk O, Kieseritzky E, Rocker J, Risse T, Gao HJ, Nilius N, Freund HJ. Charge-Mediated Adsorption Behavior of CO on MgO-Supported Au Clusters. J Am Chem Soc 2010; 132:7745-9. [DOI: 10.1021/ja101188x] [Citation(s) in RCA: 106] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiao Lin
- Fritz-Haber-Institut der MPG, Faradayweg 4-6, D-14195 Berlin, Germany and Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China
| | - Bing Yang
- Fritz-Haber-Institut der MPG, Faradayweg 4-6, D-14195 Berlin, Germany and Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China
| | - Hadj-Mohamed Benia
- Fritz-Haber-Institut der MPG, Faradayweg 4-6, D-14195 Berlin, Germany and Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China
| | - Philipp Myrach
- Fritz-Haber-Institut der MPG, Faradayweg 4-6, D-14195 Berlin, Germany and Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China
| | - Maxim Yulikov
- Fritz-Haber-Institut der MPG, Faradayweg 4-6, D-14195 Berlin, Germany and Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China
| | - Andreas Aumer
- Fritz-Haber-Institut der MPG, Faradayweg 4-6, D-14195 Berlin, Germany and Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China
| | - Matthew A. Brown
- Fritz-Haber-Institut der MPG, Faradayweg 4-6, D-14195 Berlin, Germany and Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China
| | - Martin Sterrer
- Fritz-Haber-Institut der MPG, Faradayweg 4-6, D-14195 Berlin, Germany and Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China
| | - Oleksander Bondarchuk
- Fritz-Haber-Institut der MPG, Faradayweg 4-6, D-14195 Berlin, Germany and Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China
| | - Esther Kieseritzky
- Fritz-Haber-Institut der MPG, Faradayweg 4-6, D-14195 Berlin, Germany and Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China
| | - Jan Rocker
- Fritz-Haber-Institut der MPG, Faradayweg 4-6, D-14195 Berlin, Germany and Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China
| | - Thomas Risse
- Fritz-Haber-Institut der MPG, Faradayweg 4-6, D-14195 Berlin, Germany and Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China
| | - Hong-Jun Gao
- Fritz-Haber-Institut der MPG, Faradayweg 4-6, D-14195 Berlin, Germany and Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China
| | - Niklas Nilius
- Fritz-Haber-Institut der MPG, Faradayweg 4-6, D-14195 Berlin, Germany and Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China
| | - Hans-Joachim Freund
- Fritz-Haber-Institut der MPG, Faradayweg 4-6, D-14195 Berlin, Germany and Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China
| |
Collapse
|
74
|
Conrad F, Zhou Y, Yulikov M, Hametner K, Weyeneth S, Jeschke G, Günther D, Grunwaldt JD, Patzke GR. Microwave-Hydrothermal Synthesis of Nanostructured Zinc-Copper Gallates. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.200901169] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
75
|
Albrecht M, Yulikov M, Kohn T, Jeschke G, Adams J, Schmidt A. Pyridinium salts and ylides as partial structures of photoresponsive Merrifield resins. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/b919862h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
76
|
Jiang D, Urakawa A, Yulikov M, Mallat T, Jeschke G, Baiker A. Size Selectivity of a Copper Metal-Organic Framework and Origin of Catalytic Activity in Epoxide Alcoholysis. Chemistry 2009; 15:12255-62. [DOI: 10.1002/chem.200901510] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
77
|
Affiliation(s)
- Samra Obeid
- Department of Chemistry and Konstanz Research School Chemical Biology, University of Konstanz, Universitätsstrasse 10, 78457 Konstanz, Germany
| | | | | | | |
Collapse
|
78
|
|
79
|
Yulikov M, Sterrer M, Heyde M, Rust HP, Risse T, Freund HJ, Pacchioni G, Scagnelli A. Binding of single gold atoms on thin MgO(001) films. Phys Rev Lett 2006; 96:146804. [PMID: 16712109 DOI: 10.1103/physrevlett.96.146804] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2005] [Indexed: 05/09/2023]
Abstract
In the present Letter the first electron paramagnetic resonance spectra of single metal atoms on a single crystalline oxide surface are presented. For Au atoms on a MgO(001) film investigated here an analysis of the angular dependent resonance positions and the hyperfine coupling to (17)O shows that the atoms are bound on top of oxygen ions on the terrace of the film. This result is in perfect agreement with scanning tunneling microscopy measurements at 5 K presented here. The measured hyperfine matrix components allow an experimental verification of the theoretically proposed binding mechanism of Au atoms on MgO. In particular, the large reduction of the isotropic hyperfine coupling constant of supported Au as compared to free atoms is not due to a charge transfer at the interface but a hybridization of orbitals and a resulting polarization of the unpaired electron.
Collapse
Affiliation(s)
- Maxim Yulikov
- Department of Chemical Physics, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
| | | | | | | | | | | | | | | |
Collapse
|
80
|
Sterrer M, Yulikov M, Fischbach E, Heyde M, Rust HP, Pacchioni G, Risse T, Freund HJ. Interaction of Gold Clusters with Color Centers on MgO(001) Films. Angew Chem Int Ed Engl 2006; 45:2630-2. [PMID: 16532505 DOI: 10.1002/anie.200504443] [Citation(s) in RCA: 143] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Martin Sterrer
- Fritz Haber Institute of the Max Planck Society, Department of Chemical Physics, 14195 Berlin, Germany
| | | | | | | | | | | | | | | |
Collapse
|
81
|
Sterrer M, Yulikov M, Fischbach E, Heyde M, Rust HP, Pacchioni G, Risse T, Freund HJ. Wechselwirkung kleiner Au-Teilchen mit Farbzentren auf einkristallinen MgO(001)-Filmen. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200504443] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
82
|
Sterrer M, Yulikov M, Risse T, Freund HJ, Carrasco J, Illas F, Di Valentin C, Giordano L, Pacchioni G. When the Reporter Induces the Effect: Unusual IR spectra of CO on Au1/MgO(001)/Mo(001). Angew Chem Int Ed Engl 2006; 45:2633-5. [PMID: 16548045 DOI: 10.1002/anie.200504473] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Martin Sterrer
- Fritz Haber Institute of the Max Planck Society, Department of Chemical Physics, 14195 Berlin, Germany
| | | | | | | | | | | | | | | | | |
Collapse
|
83
|
Sterrer M, Yulikov M, Risse T, Freund HJ, Carrasco J, Illas F, Di Valentin C, Giordano L, Pacchioni G. Ungewöhnliches Schwingungsspektrum von CO auf Au1/MgO(001)/Mo(001): ein Effekt der Sonde. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200504473] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|