1
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Schubert K, Guo M, Atak K, Dörner S, Bülow C, von Issendorff B, Klumpp S, Lau JT, Miedema PS, Schlathölter T, Techert S, Timm M, Wang X, Zamudio-Bayer V, Schwob L, Bari S. The electronic structure and deexcitation pathways of an isolated metalloporphyrin ion resolved by metal L-edge spectroscopy. Chem Sci 2021; 12:3966-3976. [PMID: 34163667 PMCID: PMC8179464 DOI: 10.1039/d0sc06591a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 01/23/2021] [Indexed: 11/21/2022] Open
Abstract
The local electronic structure of the metal-active site and the deexcitation pathways of metalloporphyrins are crucial for numerous applications but difficult to access by commonly employed techniques. Here, we applied near-edge X-ray absorption mass spectrometry and quantum-mechanical restricted active space calculations to investigate the electronic structure of the metal-active site of the isolated cobalt(iii) protoporphyrin IX cation (CoPPIX+) and its deexcitation pathways upon resonant absorption at the cobalt L-edge. The experiments were carried out in the gas phase, thus allowing for control over the chemical state and molecular environment of the metalloporphyrin. The obtained mass spectra reveal that resonant excitations of CoPPIX+ at the cobalt L3-edge lead predominantly to the formation of the intact radical dication and doubly charged fragments through losses of charged and neutral side chains from the macrocycle. The comparison between experiment and theory shows that CoPPIX+ is in a 3A2g triplet ground state and that competing excitations to metal-centred non-bonding and antibonding σ* molecular orbitals lead to distinct deexcitation pathways.
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Affiliation(s)
- Kaja Schubert
- Deutsches Elektronen-Synchrotron DESY 22607 Hamburg Germany
| | - Meiyuan Guo
- Division of Chemical Physics, Chemical Center, Lund University SE-221 00 Lund Sweden
| | - Kaan Atak
- Deutsches Elektronen-Synchrotron DESY 22607 Hamburg Germany
| | - Simon Dörner
- Deutsches Elektronen-Synchrotron DESY 22607 Hamburg Germany
| | - Christine Bülow
- Abteilung für Hochempfindliche Röntgenspektroskopie, Helmholtz-Zentrum Berlin für Materialien und Energie 12489 Berlin Germany
| | - Bernd von Issendorff
- Physikalisches Institut, Albert-Ludwigs-Universität Freiburg 79104 Freiburg Germany
| | - Stephan Klumpp
- Deutsches Elektronen-Synchrotron DESY 22607 Hamburg Germany
| | - J Tobias Lau
- Abteilung für Hochempfindliche Röntgenspektroskopie, Helmholtz-Zentrum Berlin für Materialien und Energie 12489 Berlin Germany
- Physikalisches Institut, Albert-Ludwigs-Universität Freiburg 79104 Freiburg Germany
| | | | - Thomas Schlathölter
- Zernike Institute for Advanced Materials, University of Groningen 9747 AG Groningen The Netherlands
| | - Simone Techert
- Deutsches Elektronen-Synchrotron DESY 22607 Hamburg Germany
- Institut für Röntgenphysik, Georg-August-Universität Göttingen 37077 Göttingen Germany
| | - Martin Timm
- Abteilung für Hochempfindliche Röntgenspektroskopie, Helmholtz-Zentrum Berlin für Materialien und Energie 12489 Berlin Germany
| | - Xin Wang
- Zernike Institute for Advanced Materials, University of Groningen 9747 AG Groningen The Netherlands
| | - Vicente Zamudio-Bayer
- Abteilung für Hochempfindliche Röntgenspektroskopie, Helmholtz-Zentrum Berlin für Materialien und Energie 12489 Berlin Germany
| | - Lucas Schwob
- Deutsches Elektronen-Synchrotron DESY 22607 Hamburg Germany
| | - Sadia Bari
- Deutsches Elektronen-Synchrotron DESY 22607 Hamburg Germany
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2
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Yalovega GE, Kremennaya MA. Structural Diagnostics of Biological Systems Based on X-Ray Absorption Spectroscopy. CRYSTALLOGR REP+ 2020. [DOI: 10.1134/s1063774520060395] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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3
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Guo M, Källman E, Pinjari RV, Couto RC, Kragh Sørensen L, Lindh R, Pierloot K, Lundberg M. Fingerprinting Electronic Structure of Heme Iron by Ab Initio Modeling of Metal L-Edge X-ray Absorption Spectra. J Chem Theory Comput 2018; 15:477-489. [DOI: 10.1021/acs.jctc.8b00658] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Meiyuan Guo
- Department of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
- Department of Chemistry - Ångström Laboratory, Uppsala University, 751 20 Uppsala, Sweden
| | - Erik Källman
- Department of Chemistry - Ångström Laboratory, Uppsala University, 751 20 Uppsala, Sweden
| | - Rahul V. Pinjari
- School of Chemical Sciences, Swami Ramanand Teerth Marathwada University, Nanded 431606, Maharashtra, India
| | - Rafael C. Couto
- Department of Chemistry - Ångström Laboratory, Uppsala University, 751 20 Uppsala, Sweden
| | - Lasse Kragh Sørensen
- Department of Chemistry - Ångström Laboratory, Uppsala University, 751 20 Uppsala, Sweden
| | - Roland Lindh
- Department of Chemistry - Ångström Laboratory, Uppsala University, 751 20 Uppsala, Sweden
| | - Kristine Pierloot
- Department of Chemistry, University of Leuven, Celestijnenlaan 200F, B-3001 Heverlee Leuven, Belgium
| | - Marcus Lundberg
- Department of Chemistry - Ångström Laboratory, Uppsala University, 751 20 Uppsala, Sweden
- Department of Biotechnology, Chemistry and Pharmacy, Università di Siena, Via A. Moro 2, 53100 Siena, Italy
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4
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Bennett JA, Miller DP, Simpson SM, Rodriguez M, Zurek E. Electrochemical Atomic Force Microscopy and First-Principles Calculations of Ferriprotoporphyrin Adsorption and Polymerization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:11335-11346. [PMID: 30157638 DOI: 10.1021/acs.langmuir.8b02059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The adsorption and subsequent electrooxidative polymerization of ferriprotoporphyrin IX chloride (hemin; FePPCl) was investigated on highly ordered pyrolytic graphite, glassy carbon, and polycrystalline Pt electrodes using electrochemical atomic force microscopy, first-principles calculations, and cyclic voltammetry. Hemin was shown to readily adsorb to all three surfaces; however, it was more continuous over the carbon surfaces compared to the Pt surface. This disparity in adsorption appears to be a major contributing factor to differences observed between the electrodes following hemin electropolymerization. Despite differences in roughness and morphology, hemin polymerized as a continuous layer over each electrode surface. Periodic density functional theory calculations were used to model FePP (without Cl) on both the Pt(111) and graphite surfaces using the vdW-DF-optPBE functional to account for the dispersion interactions. Our calculations suggest that the FePP molecule chemisorbs to the Pt surface while at the same time exhibiting intramolecular hydrogen bonding between the carboxylic acid groups, which are extended away from the surface. In contrast to FePP-Pt chemisorption, FePP was found to physisorb to graphite. The preferred spin state upon adsorption was found to be S = 2 on Pt(111), whereas on graphite, the high and intermediate spin states were nearly isoenergetic. Additionally, gas-phase calculations suggest that much of the surface roughness observed microscopically for the polymerized porphyrin layer may originate from the nonparallel stacking of porphyrin molecules, which interact with each other by forming four intermolecular hydrogen bonds and through dispersion interactions between the stacked porphyrin rings. Regardless of polymer thickness, the underlying electrode appears to be able to participate in at least some redox processes. This was observed for the hemin-polymerized Pt electrode using the 2H+/H2 redox couple and was suspected to be due to some Pt surface atoms not being specifically coordinated to the hemin molecules and therefore available to react with H+ that was small enough to diffuse through the polymer layer.
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Affiliation(s)
- Jason A Bennett
- School of Science , Penn State Behrend , 4205 College Drive , Erie , Pennsylvania 16563 , United States
| | - Daniel P Miller
- Department of Chemistry , State University of New York at Buffalo , Buffalo , New York 14260 , United States
| | - Scott M Simpson
- Department of Chemistry , St. Bonaventure University , St. Bonaventure , New York 14778 , United States
| | - Marcela Rodriguez
- School of Science , Penn State Behrend , 4205 College Drive , Erie , Pennsylvania 16563 , United States
| | - Eva Zurek
- Department of Chemistry , State University of New York at Buffalo , Buffalo , New York 14260 , United States
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5
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Bergmann N, Bonhommeau S, Lange KM, Greil SM, Eisebitt S, de Groot F, Chergui M, Aziz EF. Retraction: On the enzymatic activity of catalase: an iron L-edge X-ray absorption study of the active centre. Phys Chem Chem Phys 2018; 20:16294. [DOI: 10.1039/c8cp91772h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Retraction of ‘On the enzymatic activity of catalase: an iron L-edge X-ray absorption study of the active centre’ by Nora Bergmann et al., Phys. Chem. Chem. Phys., 2010, 12, 4827–4832.
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Affiliation(s)
- Nora Bergmann
- Max-Delbrück-Center for Molecular Medicine
- D-13125 Berlin-Buch
- Germany
| | - Sébastien Bonhommeau
- Institut des Sciences Moléculaires-UMR 5255 CNRS
- Université Bordeaux 1
- 33405 Talence Cedex
- France
| | - Kathrin M. Lange
- Helmholtz-Zentrum Berlin für Materialen und Energie c/o BESSY II
- 12489 Berlin
- Germany
| | - Stefanie M. Greil
- Helmholtz-Zentrum Berlin für Materialen und Energie c/o BESSY II
- 12489 Berlin
- Germany
| | - Stefan Eisebitt
- Helmholtz-Zentrum Berlin für Materialen und Energie c/o BESSY II
- 12489 Berlin
- Germany
- Technical University Berlin
- Institute for Optics and Atomic Physics ER 1-1 Strasse des 17. Juni 135
| | - Frank de Groot
- Department of Inorganic Chemistry and Catalysis
- 3584 CA Utrecht
- The Netherlands
| | - Majed Chergui
- Ecole Polytechnique Fédérale de Lausanne
- Laboratoire de Spectroscopie Ultrarapide
- Faculté des Sciences de Base
- ISIC-BSP
- CH-1015 Lausanne-Dorigny
| | - Emad F. Aziz
- Helmholtz-Zentrum Berlin für Materialen und Energie c/o BESSY II
- 12489 Berlin
- Germany
- Ecole Polytechnique Fédérale de Lausanne
- Laboratoire de Spectroscopie Ultrarapide
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6
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Titus CJ, Baker ML, Lee SJ, Cho HM, Doriese WB, Fowler JW, Gaffney K, Gard JD, Hilton GC, Kenney C, Knight J, Li D, Marks R, Minitti MP, Morgan KM, O'Neil GC, Reintsema CD, Schmidt DR, Sokaras D, Swetz DS, Ullom JN, Weng TC, Williams C, Young BA, Irwin KD, Solomon EI, Nordlund D. L-edge spectroscopy of dilute, radiation-sensitive systems using a transition-edge-sensor array. J Chem Phys 2017; 147:214201. [PMID: 29221417 PMCID: PMC5720893 DOI: 10.1063/1.5000755] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Accepted: 11/06/2017] [Indexed: 01/21/2023] Open
Abstract
We present X-ray absorption spectroscopy and resonant inelastic X-ray scattering (RIXS) measurements on the iron L-edge of 0.5 mM aqueous ferricyanide. These measurements demonstrate the ability of high-throughput transition-edge-sensor (TES) spectrometers to access the rich soft X-ray (100-2000 eV) spectroscopy regime for dilute and radiation-sensitive samples. Our low-concentration data are in agreement with high-concentration measurements recorded by grating spectrometers. These results show that soft-X-ray RIXS spectroscopy acquired by high-throughput TES spectrometers can be used to study the local electronic structure of dilute metal-centered complexes relevant to biology, chemistry, and catalysis. In particular, TES spectrometers have a unique ability to characterize frozen solutions of radiation- and temperature-sensitive samples.
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Affiliation(s)
- Charles J Titus
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - Michael L Baker
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| | - Sang Jun Lee
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Hsiao-Mei Cho
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - William B Doriese
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - Joseph W Fowler
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - Kelly Gaffney
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Johnathon D Gard
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - Gene C Hilton
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - Chris Kenney
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Jason Knight
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Dale Li
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Ronald Marks
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Michael P Minitti
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Kelsey M Morgan
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - Galen C O'Neil
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - Carl D Reintsema
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - Daniel R Schmidt
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - Dimosthenis Sokaras
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Daniel S Swetz
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - Joel N Ullom
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - Tsu-Chien Weng
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | | | - Betty A Young
- Department of Physics, Santa Clara University, Santa Clara, California 95053, USA
| | - Kent D Irwin
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - Edward I Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| | - Dennis Nordlund
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
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7
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Smith JW, Saykally RJ. Soft X-ray Absorption Spectroscopy of Liquids and Solutions. Chem Rev 2017; 117:13909-13934. [DOI: 10.1021/acs.chemrev.7b00213] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Jacob W. Smith
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Lab, Berkeley, California 94720, United States
| | - Richard J. Saykally
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Lab, Berkeley, California 94720, United States
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8
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Shafizadeh N, Soorkia S, Grégoire G, Broquier M, Crestoni ME, Soep B. Dioxygen Binding to Protonated Heme in the Gas Phase, an Intermediate Between Ferric and Ferrous Heme. Chemistry 2017; 23:13493-13500. [DOI: 10.1002/chem.201702615] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Indexed: 12/18/2022]
Affiliation(s)
- Niloufar Shafizadeh
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Sud; Université Paris-Saclay; 91405 Orsay France
| | - Satchin Soorkia
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Sud; Université Paris-Saclay; 91405 Orsay France
| | - Gilles Grégoire
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Sud; Université Paris-Saclay; 91405 Orsay France
| | - Michel Broquier
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Sud; Université Paris-Saclay; 91405 Orsay France
- Centre Laser de l'Université Paris-Sud (CLUPS/LUMAT), Université Paris-Sud, CNRS, IOGS, Université Paris-Saclay; 91405 Orsay France
| | - Maria-Elisa Crestoni
- Dipartimento di Chimica e Tecnologie del Farmaco; Università degli Studi di Roma “La Sapienza”; P. le A. Moro 5 00185 Roma Italy
| | - Benoît Soep
- LIDYL, CEA, CNRS; Université Paris-Saclay, CEA Saclay; 91191 Gif-sur-Yvette France
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9
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Kubin M, Kern J, Gul S, Kroll T, Chatterjee R, Löchel H, Fuller FD, Sierra RG, Quevedo W, Weniger C, Rehanek J, Firsov A, Laksmono H, Weninger C, Alonso-Mori R, Nordlund DL, Lassalle-Kaiser B, Glownia JM, Krzywinski J, Moeller S, Turner JJ, Minitti MP, Dakovski GL, Koroidov S, Kawde A, Kanady JS, Tsui EY, Suseno S, Han Z, Hill E, Taguchi T, Borovik AS, Agapie T, Messinger J, Erko A, Föhlisch A, Bergmann U, Mitzner R, Yachandra VK, Yano J, Wernet P. Soft x-ray absorption spectroscopy of metalloproteins and high-valent metal-complexes at room temperature using free-electron lasers. STRUCTURAL DYNAMICS (MELVILLE, N.Y.) 2017; 4:054307. [PMID: 28944255 PMCID: PMC5586166 DOI: 10.1063/1.4986627] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 08/15/2017] [Indexed: 05/19/2023]
Abstract
X-ray absorption spectroscopy at the L-edge of 3d transition metals provides unique information on the local metal charge and spin states by directly probing 3d-derived molecular orbitals through 2p-3d transitions. However, this soft x-ray technique has been rarely used at synchrotron facilities for mechanistic studies of metalloenzymes due to the difficulties of x-ray-induced sample damage and strong background signals from light elements that can dominate the low metal signal. Here, we combine femtosecond soft x-ray pulses from a free-electron laser with a novel x-ray fluorescence-yield spectrometer to overcome these difficulties. We present L-edge absorption spectra of inorganic high-valent Mn complexes (Mn ∼ 6-15 mmol/l) with no visible effects of radiation damage. We also present the first L-edge absorption spectra of the oxygen evolving complex (Mn4CaO5) in Photosystem II (Mn < 1 mmol/l) at room temperature, measured under similar conditions. Our approach opens new ways to study metalloenzymes under functional conditions.
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Affiliation(s)
- Markus Kubin
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | | | - Sheraz Gul
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Thomas Kroll
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Ruchira Chatterjee
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Heike Löchel
- Institute for Nanometre Optics and Technology, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - Franklin D Fuller
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Raymond G Sierra
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Wilson Quevedo
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - Christian Weniger
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - Jens Rehanek
- Institute for Nanometre Optics and Technology, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - Anatoly Firsov
- Institute for Nanometre Optics and Technology, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - Hartawan Laksmono
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | | | - Roberto Alonso-Mori
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Dennis L Nordlund
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | | | - James M Glownia
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Jacek Krzywinski
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Stefan Moeller
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Joshua J Turner
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Michael P Minitti
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Georgi L Dakovski
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | | | - Anurag Kawde
- Institutionen för Kemi, Kemiskt Biologiskt Centrum, Umeå Universitet, SE 90187 Umeå, Sweden
| | - Jacob S Kanady
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA
| | - Emily Y Tsui
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA
| | - Sandy Suseno
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA
| | - Zhiji Han
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA
| | - Ethan Hill
- Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, California 92697-2025, USA
| | - Taketo Taguchi
- Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, California 92697-2025, USA
| | - Andrew S Borovik
- Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, California 92697-2025, USA
| | - Theodor Agapie
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA
| | | | - Alexei Erko
- Institute for Nanometre Optics and Technology, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | | | - Uwe Bergmann
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Rolf Mitzner
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - Vittal K Yachandra
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Junko Yano
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Philippe Wernet
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
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10
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Golnak R, Xiao J, Atak K, Unger I, Seidel R, Winter B, Aziz EF. Undistorted X-ray Absorption Spectroscopy Using s-Core-Orbital Emissions. J Phys Chem A 2016; 120:2808-14. [PMID: 27101344 DOI: 10.1021/acs.jpca.6b01699] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Detection of secondary emissions, fluorescence yield (FY), or electron yield (EY), originating from the relaxation processes upon X-ray resonant absorption has been widely adopted for X-ray absorption spectroscopy (XAS) measurements when the primary absorption process cannot be probed directly in transmission mode. Various spectral distortion effects inherent in the relaxation processes and in the subsequent transportation of emitted particles (electron or photon) through the sample, however, undermine the proportionality of the emission signals to the X-ray absorption coefficient. In the present study, multiple radiative (FY) and nonradiative (EY) decay channels have been experimentally investigated on a model system, FeCl3 aqueous solution, at the excitation energy of the Fe L-edge. The systematic comparisons between the experimental spectra taken from various decay channels, as well as the comparison with the theoretically simulated Fe L-edge XA spectrum that involves only the absorption process, indicate that the detection of the Fe 3s → 2p partial fluorescence yield (PFY) gives rise to the true Fe L-edge XA spectrum. The two key characteristics generalized from this particular decay channel-zero orbital angular momentum (i.e., s orbital) and core-level emission-set a guideline for obtaining undistorted X-ray absorption spectra in the future.
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Affiliation(s)
- Ronny Golnak
- Institute of Methods for Material Development, Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) , Albert-Einstein-Strasse 15, D-12489 Berlin, Germany.,Department of Chemistry, Free University Berlin , Takustrasse 3, 14195 Berlin, Germany
| | - Jie Xiao
- Institute of Methods for Material Development, Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) , Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - Kaan Atak
- Institute of Methods for Material Development, Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) , Albert-Einstein-Strasse 15, D-12489 Berlin, Germany.,Department of Physics, Free University Berlin , Arnimallee 14, 14195 Berlin, Germany
| | - Isaak Unger
- Institute of Methods for Material Development, Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) , Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - Robert Seidel
- Institute of Methods for Material Development, Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) , Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - Bernd Winter
- Institute of Methods for Material Development, Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) , Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - Emad F Aziz
- Institute of Methods for Material Development, Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) , Albert-Einstein-Strasse 15, D-12489 Berlin, Germany.,Department of Physics, Free University Berlin , Arnimallee 14, 14195 Berlin, Germany
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11
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Jordan I, Huppert M, Brown MA, van Bokhoven JA, Wörner HJ. Photoelectron spectrometer for attosecond spectroscopy of liquids and gases. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2015; 86:123905. [PMID: 26724045 DOI: 10.1063/1.4938175] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
A new apparatus for attosecond time-resolved photoelectron spectroscopy of liquids and gases is described. It combines a liquid microjet source with a magnetic-bottle photoelectron spectrometer and an actively stabilized attosecond beamline. The photoelectron spectrometer permits venting and pumping of the interaction chamber without affecting the low pressure in the flight tube. This pressure separation has been realized through a sliding skimmer plate, which effectively seals the flight tube in its closed position and functions as a differential pumping stage in its open position. A high-harmonic photon spectrometer, attached to the photoelectron spectrometer, exit port is used to acquire photon spectra for calibration purposes. Attosecond pulse trains have been used to record photoelectron spectra of noble gases, water in the gas and liquid states as well as solvated species. RABBIT scans demonstrate the attosecond resolution of this setup.
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Affiliation(s)
- I Jordan
- Laboratory of Physical Chemistry, ETH Zurich, Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland
| | - M Huppert
- Laboratory of Physical Chemistry, ETH Zurich, Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland
| | - M A Brown
- Laboratory for Surface Science and Technology, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, 8093 Zurich, Switzerland
| | - J A van Bokhoven
- Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
| | - H J Wörner
- Laboratory of Physical Chemistry, ETH Zurich, Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland
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12
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NO binding kinetics in myoglobin investigated by picosecond Fe K-edge absorption spectroscopy. Proc Natl Acad Sci U S A 2015; 112:12922-7. [PMID: 26438842 DOI: 10.1073/pnas.1424446112] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Diatomic ligands in hemoproteins and the way they bind to the active center are central to the protein's function. Using picosecond Fe K-edge X-ray absorption spectroscopy, we probe the NO-heme recombination kinetics with direct sensitivity to the Fe-NO binding after 532-nm photoexcitation of nitrosylmyoglobin (MbNO) in physiological solutions. The transients at 70 and 300 ps are identical, but they deviate from the difference between the static spectra of deoxymyoglobin and MbNO, showing the formation of an intermediate species. We propose the latter to be a six-coordinated domed species that is populated on a timescale of ∼ 200 ps by recombination with NO ligands. This work shows the feasibility of ultrafast pump-probe X-ray spectroscopic studies of proteins in physiological media, delivering insight into the electronic and geometric structure of the active center.
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13
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Quantum interference measurement of spin interactions in a bio-organic/semiconductor device structure. Sci Rep 2015; 5:9487. [PMID: 25820781 PMCID: PMC4377638 DOI: 10.1038/srep09487] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Accepted: 03/04/2015] [Indexed: 02/07/2023] Open
Abstract
Quantum interference is used to measure the spin interactions between an InAs surface electron system and the iron center in the biomolecule hemin in nanometer proximity in a bio-organic/semiconductor device structure. The interference quantifies the influence of hemin on the spin decoherence properties of the surface electrons. The decoherence times of the electrons serve to characterize the biomolecule, in an electronic complement to the use of spin decoherence times in magnetic resonance. Hemin, prototypical for the heme group in hemoglobin, is used to demonstrate the method, as a representative biomolecule where the spin state of a metal ion affects biological functions. The electronic determination of spin decoherence properties relies on the quantum correction of antilocalization, a result of quantum interference in the electron system. Spin-flip scattering is found to increase with temperature due to hemin, signifying a spin exchange between the iron center and the electrons, thus implying interactions between a biomolecule and a solid-state system in the hemin/InAs hybrid structure. The results also indicate the feasibility of artificial bioinspired materials using tunable carrier systems to mediate interactions between biological entities.
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14
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Lima FA, Penfold TJ, van der Veen RM, Reinhard M, Abela R, Tavernelli I, Rothlisberger U, Benfatto M, Milne CJ, Chergui M. Probing the electronic and geometric structure of ferric and ferrous myoglobins in physiological solutions by Fe K-edge absorption spectroscopy. Phys Chem Chem Phys 2014; 16:1617-31. [PMID: 24317683 DOI: 10.1039/c3cp53683a] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present an iron K-edge X-ray absorption study of carboxymyoglobin (MbCO), nitrosylmyoglobin (MbNO), oxymyoglobin (MbO2), cyanomyoglobin (MbCN), aquomet myoglobin (metMb) and unligated myoglobin (deoxyMb) in physiological media. The analysis of the XANES region is performed using the full-multiple scattering formalism, implemented within the MXAN package. This reveals trends within the heme structure, absent from previous crystallographic and X-ray absorption analysis. In particular, the iron-nitrogen bond lengths in the porphyrin ring converge to a common value of about 2 Å, except for deoxyMb whose bigger value is due to the doming of the heme. The trends of the Fe-Nε (His93) bond length is found to be consistent with the effect of ligand binding to the iron, with the exception of MbNO, which is explained in terms of the repulsive trans effect. We derive a high resolution description of the relative geometry of the ligands with respect to the heme and quantify the magnitude of the heme doming in the deoxyMb form. Finally, time-dependent density functional theory is used to simulate the pre-edge spectra and is found to be in good agreement with the experiment. The XAS spectra typically exhibit one pre-edge feature which arises from transitions into the unoccupied dσ and dπ - πligand* orbitals. 1s → dπ transitions contribute weakly for MbO2, metMb and deoxyMb. However, despite this strong Fe d contribution these transitions are found to be dominated by the dipole (1s → 4p) moment due to the low symmetry of the heme environment.
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Affiliation(s)
- Frederico A Lima
- École Polytechnique Fédérale de Lausanne, Laboratoire de Spectroscopie Ultrarapide, ISIC, FSB-BSP, CH-1015 Lausanne, CH, Switzerland.
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15
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Atak K, Golnak R, Xiao J, Suljoti E, Pflüger M, Brandenburg T, Winter B, Aziz EF. Electronic Structure of Hemin in Solution Studied by Resonant X-ray Emission Spectroscopy and Electronic Structure Calculations. J Phys Chem B 2014; 118:9938-43. [DOI: 10.1021/jp505129m] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Kaan Atak
- Joint
Laboratory for Ultrafast Dynamics in Solutions and at Interfaces (JULiq), Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, 12489 Berlin, Germany
- Fachbereich
Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
| | - Ronny Golnak
- Joint
Laboratory for Ultrafast Dynamics in Solutions and at Interfaces (JULiq), Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, 12489 Berlin, Germany
- Fachbereich
Chemie, Freie Universität Berlin, Takustrasse 3, D-14195 Berlin, Germany
| | - Jie Xiao
- Joint
Laboratory for Ultrafast Dynamics in Solutions and at Interfaces (JULiq), Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, 12489 Berlin, Germany
| | - Edlira Suljoti
- Joint
Laboratory for Ultrafast Dynamics in Solutions and at Interfaces (JULiq), Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, 12489 Berlin, Germany
| | - Mika Pflüger
- Joint
Laboratory for Ultrafast Dynamics in Solutions and at Interfaces (JULiq), Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, 12489 Berlin, Germany
- Fachbereich
Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
| | - Tim Brandenburg
- Joint
Laboratory for Ultrafast Dynamics in Solutions and at Interfaces (JULiq), Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, 12489 Berlin, Germany
- Fachbereich
Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
| | - Bernd Winter
- Joint
Laboratory for Ultrafast Dynamics in Solutions and at Interfaces (JULiq), Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, 12489 Berlin, Germany
| | - Emad F. Aziz
- Joint
Laboratory for Ultrafast Dynamics in Solutions and at Interfaces (JULiq), Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, 12489 Berlin, Germany
- Fachbereich
Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
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16
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Xiao J, Golnak R, Atak K, Pflüger M, Pohl M, Suljoti E, Winter B, Aziz EF. Assistance of the Iron Porphyrin Ligands to the Binding Interaction between the Fe Center and Small Molecules in Solution. J Phys Chem B 2014; 118:9371-7. [DOI: 10.1021/jp5023339] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Jie Xiao
- Joint
Ultrafast Dynamics Lab in Solutions and at Interfaces (JULiq), Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, D-12489 Berlin, Germany
| | - Ronny Golnak
- Joint
Ultrafast Dynamics Lab in Solutions and at Interfaces (JULiq), Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, D-12489 Berlin, Germany
- Fachbereich
Biologie, Chemie, Pharmazie, Freie Universität Berlin, Takustrasse 3, D-14195 Berlin, Germany
| | - Kaan Atak
- Joint
Ultrafast Dynamics Lab in Solutions and at Interfaces (JULiq), Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, D-12489 Berlin, Germany
- Fachbereich
Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
| | - Mika Pflüger
- Joint
Ultrafast Dynamics Lab in Solutions and at Interfaces (JULiq), Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, D-12489 Berlin, Germany
- Fachbereich
Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
| | - Marvin Pohl
- Joint
Ultrafast Dynamics Lab in Solutions and at Interfaces (JULiq), Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, D-12489 Berlin, Germany
- Fachbereich
Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
| | - Edlira Suljoti
- Joint
Ultrafast Dynamics Lab in Solutions and at Interfaces (JULiq), Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, D-12489 Berlin, Germany
| | - Bernd Winter
- Joint
Ultrafast Dynamics Lab in Solutions and at Interfaces (JULiq), Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, D-12489 Berlin, Germany
| | - Emad F. Aziz
- Joint
Ultrafast Dynamics Lab in Solutions and at Interfaces (JULiq), Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, D-12489 Berlin, Germany
- Fachbereich
Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
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17
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In-situ Characterization of Molecular Processes in Liquids by Ultrafast X-ray Absorption Spectroscopy. IN-SITU MATERIALS CHARACTERIZATION 2014. [DOI: 10.1007/978-3-642-45152-2_1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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18
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Mitzner R, Rehanek J, Kern J, Gul S, Hattne J, Taguchi T, Alonso-Mori R, Tran R, Weniger C, Schröder H, Quevedo W, Laksmono H, Sierra RG, Han G, Lassalle-Kaiser B, Koroidov S, Kubicek K, Schreck S, Kunnus K, Brzhezinskaya M, Firsov A, Minitti MP, Turner JJ, Moeller S, Sauter NK, Bogan MJ, Nordlund D, Schlotter WF, Messinger J, Borovik A, Techert S, de Groot FMF, Föhlisch A, Erko A, Bergmann U, Yachandra VK, Wernet P, Yano J. L-Edge X-ray Absorption Spectroscopy of Dilute Systems Relevant to Metalloproteins Using an X-ray Free-Electron Laser. J Phys Chem Lett 2013; 4:3641-3647. [PMID: 24466387 PMCID: PMC3901369 DOI: 10.1021/jz401837f] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
L-edge spectroscopy of 3d transition metals provides important electronic structure information and has been used in many fields. However, the use of this method for studying dilute aqueous systems, such as metalloenzymes, has not been prevalent because of severe radiation damage and the lack of suitable detection systems. Here we present spectra from a dilute Mn aqueous solution using a high-transmission zone-plate spectrometer at the Linac Coherent Light Source (LCLS). The spectrometer has been optimized for discriminating the Mn L-edge signal from the overwhelming O K-edge background that arises from water and protein itself, and the ultrashort LCLS X-ray pulses can outrun X-ray induced damage. We show that the deviations of the partial-fluorescence yield-detected spectra from the true absorption can be well modeled using the state-dependence of the fluorescence yield, and discuss implications for the application of our concept to biological samples.
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Affiliation(s)
- Rolf Mitzner
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - Jens Rehanek
- Institute for Nanometre Optics and Technology, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - Jan Kern
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Sheraz Gul
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Johan Hattne
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Taketo Taguchi
- Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, California 92697, United States
| | - Roberto Alonso-Mori
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Rosalie Tran
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Christian Weniger
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - Henning Schröder
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
- Institut für Physik und Astronomie, Universität Potsdam, 14476 Potsdam, Germany
| | - Wilson Quevedo
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - Hartawan Laksmono
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Raymond G. Sierra
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Guangye Han
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Benedikt Lassalle-Kaiser
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Sergey Koroidov
- Institutionen för Kemi, Kemiskt Biologiskt Centrum, Umeå Universitet, 901 87 Umeå, Sweden
| | - Katharina Kubicek
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
- Structural Dynamics of (Bio)Chemical Systems, Deutsches Elektronen-Synchtrotron (DESY), Notkestrasse 85, 22607 Hamburg, Germany
| | - Simon Schreck
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
- Institut für Physik und Astronomie, Universität Potsdam, 14476 Potsdam, Germany
| | - Kristjan Kunnus
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
- Institut für Physik und Astronomie, Universität Potsdam, 14476 Potsdam, Germany
| | - Maria Brzhezinskaya
- Institute for Nanometre Optics and Technology, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - Alexander Firsov
- Institute for Nanometre Optics and Technology, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - Michael P. Minitti
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Joshua J. Turner
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Stefan Moeller
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Nicholas K. Sauter
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Michael J. Bogan
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Dennis Nordlund
- SSRL, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - William F. Schlotter
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Johannes Messinger
- Institutionen för Kemi, Kemiskt Biologiskt Centrum, Umeå Universitet, 901 87 Umeå, Sweden
| | - Andrew Borovik
- Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, California 92697, United States
| | - Simone Techert
- Structural Dynamics of (Bio)Chemical Systems, Deutsches Elektronen-Synchtrotron (DESY), Notkestrasse 85, 22607 Hamburg, Germany
- Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany
| | - Frank M. F. de Groot
- Inorganic Chemistry and Catalysis, Utrecht University, 3584 CG Utrecht, The Netherlands
| | - Alexander Föhlisch
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
- Institut für Physik und Astronomie, Universität Potsdam, 14476 Potsdam, Germany
| | - Alexei Erko
- Institute for Nanometre Optics and Technology, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - Uwe Bergmann
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Vittal K. Yachandra
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Philippe Wernet
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - Junko Yano
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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19
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20
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Lange KM, Aziz EF. Electronic structure of ions and molecules in solution: a view from modern soft X-ray spectroscopies. Chem Soc Rev 2013; 42:6840-59. [DOI: 10.1039/c3cs00008g] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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21
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Lange KM, Golnak R, Bonhommeau S, Aziz EF. Ligand discrimination of myoglobin in solution: an iron L-edge X-ray absorption study of the active centre. Chem Commun (Camb) 2013; 49:4163-5. [DOI: 10.1039/c3cc37973f] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Iron L-edge X-ray absorption spectra of the active centre of myoglobin in the met-form, in the reduced form and upon ligation to O2, CO, NO and CN are presented.
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Affiliation(s)
| | - Ronny Golnak
- Joint Ultrafast Dynamics Lab in Solutions and at Interfaces (JULiq)
- Helmholtz-Zentrum Berlin für Materialien und Energie
- 12489 Berlin
- Germany
| | | | - Emad F. Aziz
- Joint Ultrafast Dynamics Lab in Solutions and at Interfaces (JULiq)
- Helmholtz-Zentrum Berlin für Materialien und Energie
- 12489 Berlin
- Germany
- Freie Universität Berlin
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22
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On the origin of dips in total fluorescence yield X-ray absorption spectra: Partial and inverse partial fluorescence yield at the L-edge of cobalt aqueous solution. Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2012.07.067] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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23
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Seidel R, Ghadimi S, Lange KM, Bonhommeau S, Soldatov MA, Golnak R, Kothe A, Könnecke R, Soldatov A, Thürmer S, Winter B, Aziz EF. Origin of Dark-Channel X-ray Fluorescence from Transition-Metal Ions in Water. J Am Chem Soc 2012; 134:1600-5. [DOI: 10.1021/ja207931r] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Robert Seidel
- Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, D-12489 Berlin, Germany
| | - Samira Ghadimi
- Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, D-12489 Berlin, Germany
| | - Kathrin M. Lange
- Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, D-12489 Berlin, Germany
| | - Sébastien Bonhommeau
- Institut des Sciences Moléculaires,
UMR 5255 CNRS, Université Bordeaux 1, 351 cours de la Libération, 33405 Talence Cedex, France
| | - Mikhail A. Soldatov
- Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, D-12489 Berlin, Germany
- Research Center for Nanoscale
Structure of Matter, Southern Federal University, Sorge 5, Rostov-na-Donu 344090, Russia
| | - Ronny Golnak
- Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, D-12489 Berlin, Germany
| | - Alexander Kothe
- Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, D-12489 Berlin, Germany
| | - René Könnecke
- Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, D-12489 Berlin, Germany
| | - Alexander Soldatov
- Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, D-12489 Berlin, Germany
| | - Stephan Thürmer
- Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, D-12489 Berlin, Germany
| | - Bernd Winter
- Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, D-12489 Berlin, Germany
| | - Emad F. Aziz
- Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse
15, D-12489 Berlin, Germany
- Freie Universität Berlin, FB Physik, Arnimallee 14, D-14195 Berlin, Germany
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Lange KM, Kothe A, Aziz EF. Chemistry in solution: recent techniques and applications using soft X-ray spectroscopy. Phys Chem Chem Phys 2012; 14:5331-8. [DOI: 10.1039/c2cp24028a] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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25
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Barabanschikov A, Demidov A, Kubo M, Champion PM, Sage JT, Zhao J, Sturhahn W, Alp EE. Spectroscopic identification of reactive porphyrin motions. J Chem Phys 2011; 135:015101. [PMID: 21744919 PMCID: PMC3144962 DOI: 10.1063/1.3598473] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2011] [Accepted: 05/18/2011] [Indexed: 11/14/2022] Open
Abstract
Nuclear resonance vibrational spectroscopy (NRVS) reveals the vibrational dynamics of a Mössbauer probe nucleus. Here, (57)Fe NRVS measurements yield the complete spectrum of Fe vibrations in halide complexes of iron porphyrins. Iron porphine serves as a useful symmetric model for the more complex spectrum of asymmetric heme molecules that contribute to numerous essential biological processes. Quantitative comparison with the vibrational density of states (VDOS) predicted for the Fe atom by density functional theory calculations unambiguously identifies the correct sextet ground state in each case. These experimentally authenticated calculations then provide detailed normal mode descriptions for each observed vibration. All Fe-ligand vibrations are clearly identified despite the high symmetry of the Fe environment. Low frequency molecular distortions and acoustic lattice modes also contribute to the experimental signal. Correlation matrices compare vibrations between different molecules and yield a detailed picture of how heme vibrations evolve in response to (a) halide binding and (b) asymmetric placement of porphyrin side chains. The side chains strongly influence the energetics of heme doming motions that control Fe reactivity, which are easily observed in the experimental signal.
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Affiliation(s)
- Alexander Barabanschikov
- Department of Physics and Center for Interdisciplinary Research on Complex Systems, Northeastern University, Boston, Massachusetts 02115, USA
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Insights into the Induced Ultrafast Electron Delocalization in Fe(CO)5 Using Dark Channel Fluorescence Yield X-Ray Absorption. Chemphyschem 2011; 12:2088-91. [DOI: 10.1002/cphc.201100243] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2011] [Indexed: 11/07/2022]
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Lange KM, Bergmann U, Hodeck KF, Könnecke R, Schade U, Aziz EF. Shared solvation of sodium ions in alcohol–water solutions explains the non-ideality of free energy of solvation. Phys Chem Chem Phys 2011; 13:15423-7. [DOI: 10.1039/c1cp20527g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Lange KM, Hodeck KF, Schade U, Aziz EF. Nature of the Hydrogen Bond of Water in Solvents of Different Polarities. J Phys Chem B 2010; 114:16997-7001. [DOI: 10.1021/jp109790z] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kathrin M. Lange
- Helmholtz-Zentrum Berlin für Materialien und Energie, c/o BESSY GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany, and FB Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
| | - Kai F. Hodeck
- Helmholtz-Zentrum Berlin für Materialien und Energie, c/o BESSY GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany, and FB Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
| | - Ulrich Schade
- Helmholtz-Zentrum Berlin für Materialien und Energie, c/o BESSY GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany, and FB Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
| | - Emad F. Aziz
- Helmholtz-Zentrum Berlin für Materialien und Energie, c/o BESSY GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany, and FB Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
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29
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Lange KM, Könnecke R, Ghadimi S, Golnak R, Soldatov MA, Hodeck KF, Soldatov A, Aziz EF. High resolution X-ray emission spectroscopy of water and aqueous ions using the micro-jet technique. Chem Phys 2010. [DOI: 10.1016/j.chemphys.2010.08.023] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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30
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Charge transfer to solvent identified using dark channel fluorescence-yield L-edge spectroscopy. Nat Chem 2010; 2:853-7. [DOI: 10.1038/nchem.768] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2010] [Accepted: 06/23/2010] [Indexed: 11/09/2022]
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31
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Uejio JS, Schwartz CP, Duffin AM, England A, Prendergast D, Saykally RJ. Monopeptide versus monopeptoid: insights on structure and hydration of aqueous alanine and sarcosine via X-ray absorption spectroscopy. J Phys Chem B 2010; 114:4702-9. [PMID: 20235589 DOI: 10.1021/jp911007k] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Despite the obvious significance, the aqueous interactions of peptides remain incompletely understood. Their synthetic analogues called peptoids (poly-N-substituted glycines) have recently emerged as a promising biomimetic material, particularly due to their robust secondary structure and resistance to denaturation. We describe comparative near-edge X-ray absorption fine structure spectroscopy studies of aqueous sarcosine, the simplest peptoid, and alanine, its peptide isomer, interpreted by density functional theory calculations. The sarcosine nitrogen K-edge spectrum is blue shifted with respect to that of alanine, in agreement with our calculations; we conclude that this shift results primarily from the methyl group substitution on the nitrogen of sarcosine. Our calculations indicate that the nitrogen K-edge spectrum of alanine differs significantly between dehydrated and hydrated scenarios, while that of the sarcosine zwitterion is less affected by hydration. In contrast, the computed sarcosine spectrum is greatly impacted by conformational variations, while the alanine spectrum is not. This relates to a predicted solvent dependence for alanine, as compared to sarcosine. Additionally, we show the theoretical nitrogen K-edge spectra to be sensitive to the degree of hydration, indicating that experimental X-ray spectroscopy may be able to distinguish between bulk and partial hydration, such as found in confined environments near proteins and in reverse micelles.
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Affiliation(s)
- Janel S Uejio
- Department of Chemistry, University of California, Berkeley, California 94720-1460, USA
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Huse N, Kim TK, Jamula L, McCusker JK, de Groot FMF, Schoenlein RW. Photo-Induced Spin-State Conversion in Solvated Transition Metal Complexes Probed via Time-Resolved Soft X-ray Spectroscopy. J Am Chem Soc 2010; 132:6809-16. [DOI: 10.1021/ja101381a] [Citation(s) in RCA: 124] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nils Huse
- Ultrafast X-ray Science Lab, Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Department of Chemistry, Pusan National University, Geumjeong-gu, Busan 609-735, Korea, Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, Department of Chemistry, Utrecht University, 3584 CA Utrecht, Netherlands, and Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Tae Kyu Kim
- Ultrafast X-ray Science Lab, Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Department of Chemistry, Pusan National University, Geumjeong-gu, Busan 609-735, Korea, Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, Department of Chemistry, Utrecht University, 3584 CA Utrecht, Netherlands, and Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Lindsey Jamula
- Ultrafast X-ray Science Lab, Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Department of Chemistry, Pusan National University, Geumjeong-gu, Busan 609-735, Korea, Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, Department of Chemistry, Utrecht University, 3584 CA Utrecht, Netherlands, and Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - James K. McCusker
- Ultrafast X-ray Science Lab, Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Department of Chemistry, Pusan National University, Geumjeong-gu, Busan 609-735, Korea, Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, Department of Chemistry, Utrecht University, 3584 CA Utrecht, Netherlands, and Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Frank M. F. de Groot
- Ultrafast X-ray Science Lab, Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Department of Chemistry, Pusan National University, Geumjeong-gu, Busan 609-735, Korea, Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, Department of Chemistry, Utrecht University, 3584 CA Utrecht, Netherlands, and Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Robert W. Schoenlein
- Ultrafast X-ray Science Lab, Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Department of Chemistry, Pusan National University, Geumjeong-gu, Busan 609-735, Korea, Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, Department of Chemistry, Utrecht University, 3584 CA Utrecht, Netherlands, and Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
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33
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Bressler C, Chergui M. Molecular Structural Dynamics Probed by Ultrafast X-Ray Absorption Spectroscopy. Annu Rev Phys Chem 2010; 61:263-82. [DOI: 10.1146/annurev.physchem.012809.103353] [Citation(s) in RCA: 136] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Majed Chergui
- Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Spectroscopie Ultrarapide, ISIC, Faculté des Sciences de Base, Station 6, CH-1015 Lausanne, Switzerland;
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Westenhoff S, Nazarenko E, Malmerberg E, Davidsson J, Katona G, Neutze R. Time-resolved structural studies of protein reaction dynamics: a smorgasbord of X-ray approaches. Acta Crystallogr A 2010; 66:207-19. [PMID: 20164644 PMCID: PMC2824530 DOI: 10.1107/s0108767309054361] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2009] [Accepted: 12/16/2009] [Indexed: 11/26/2022] Open
Abstract
Time-resolved structural studies of proteins have undergone several significant developments during the last decade. Recent developments using time-resolved X-ray methods, such as time-resolved Laue diffraction, low-temperature intermediate trapping, time-resolved wide-angle X-ray scattering and time-resolved X-ray absorption spectroscopy, are reviewed. Proteins undergo conformational changes during their biological function. As such, a high-resolution structure of a protein’s resting conformation provides a starting point for elucidating its reaction mechanism, but provides no direct information concerning the protein’s conformational dynamics. Several X-ray methods have been developed to elucidate those conformational changes that occur during a protein’s reaction, including time-resolved Laue diffraction and intermediate trapping studies on three-dimensional protein crystals, and time-resolved wide-angle X-ray scattering and X-ray absorption studies on proteins in the solution phase. This review emphasizes the scope and limitations of these complementary experimental approaches when seeking to understand protein conformational dynamics. These methods are illustrated using a limited set of examples including myoglobin and haemoglobin in complex with carbon monoxide, the simple light-driven proton pump bacteriorhodopsin, and the superoxide scavenger superoxide reductase. In conclusion, likely future developments of these methods at synchrotron X-ray sources and the potential impact of emerging X-ray free-electron laser facilities are speculated upon.
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Affiliation(s)
- Sebastian Westenhoff
- Department of Chemistry, Biochemistry and Biophysics, University of Gothenburg, Box 462, SE-40530 Gothenburg, Sweden
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35
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Chergui M. Picosecond and femtosecond X-ray absorption spectroscopy of molecular systems. Acta Crystallogr A 2010; 66:229-39. [DOI: 10.1107/s010876730904968x] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2009] [Accepted: 11/19/2009] [Indexed: 11/10/2022] Open
Abstract
The need to visualize molecular structure in the course of a chemical reaction, a phase transformation or a biological function has been a dream of scientists for decades. The development of time-resolved X-ray and electron-based methods is making this true. X-ray absorption spectroscopy is ideal for the study of structural dynamics in liquids, because it can be implemented in amorphous media. Furthermore, it is chemically selective. Using X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) in laser pump/X-ray probe experiments allows the retrieval of the local geometric structure of the system under study, but also the underlying photoinduced electronic structure changes that drive the structural dynamics. Recent developments in picosecond and femtosecond X-ray absorption spectroscopy applied to molecular systems in solution are reviewed: examples on ultrafast photoinduced processes such as intramolecular electron transfer, low-to-high spin change, and bond formation are presented.
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36
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Bergmann N, Bonhommeau S, Lange KM, Greil SM, Eisebitt S, de Groot F, Chergui M, Aziz EF. Retracted Article: On the enzymatic activity of catalase: an iron L-edge X-ray absorption study of the active centre. Phys Chem Chem Phys 2010; 12:4827-32. [DOI: 10.1039/b924245g] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fe L2,3-edge X-ray absorption spectra of a catalase active centre in a physiological solution reveals a partial ferryl character, which stems from the proximal tyrosine residue.
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Affiliation(s)
- Nora Bergmann
- Max-Delbrück-Center for Molecular Medicine
- D-13125 Berlin-Buch
- Germany
| | - Sébastien Bonhommeau
- Institut des Sciences Moléculaires-UMR 5255 CNRS
- Université Bordeaux 1
- 33405 Talence Cedex
- France
| | - Kathrin M. Lange
- Helmholtz-Zentrum Berlin für Materialen und Energie c/o BESSY II
- 12489 Berlin
- Germany
| | - Stefanie M. Greil
- Helmholtz-Zentrum Berlin für Materialen und Energie c/o BESSY II
- 12489 Berlin
- Germany
| | - Stefan Eisebitt
- Helmholtz-Zentrum Berlin für Materialen und Energie c/o BESSY II
- 12489 Berlin
- Germany
- Technical University Berlin
- 10623 Berlin
| | - Frank de Groot
- Department of Inorganic Chemistry and Catalysis
- Utrecht University
- 3584 CA Utrecht
- The Netherlands
| | - Majed Chergui
- Ecole Polytechnique Fédérale de Lausanne
- Laboratoire de Spectroscopie Ultrarapide
- Faculté des Sciences de Base
- ISIC-BSP
- CH-1015 Lausanne-Dorigny
| | - Emad F. Aziz
- Helmholtz-Zentrum Berlin für Materialen und Energie c/o BESSY II
- 12489 Berlin
- Germany
- Ecole Polytechnique Fédérale de Lausanne
- Laboratoire de Spectroscopie Ultrarapide
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37
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Brown MA, Faubel M, Winter B. X-Ray photo- and resonant Auger-electron spectroscopy studies of liquid water and aqueous solutions. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b803023p] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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