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Lima FA, Otte F, Vakili M, Ardana-Lamas F, Biednov M, Dall’Antonia F, Frankenberger P, Gawelda W, Gelisio L, Han H, Huang X, Jiang Y, Kloos M, Kluyver T, Knoll M, Kubicek K, Bermudez Macias IJ, Schulz J, Turkot O, Uemura Y, Valerio J, Wang H, Yousef H, Zalden P, Khakhulin D, Bressler C, Milne C. Experimental capabilities for liquid jet samples at sub-MHz rates at the FXE Instrument at European XFEL. J Synchrotron Radiat 2023; 30:1168-1182. [PMID: 37860937 PMCID: PMC10624029 DOI: 10.1107/s1600577523008159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 09/18/2023] [Indexed: 10/21/2023]
Abstract
The Femtosecond X-ray Experiments (FXE) instrument at the European X-ray Free-Electron Laser (EuXFEL) provides an optimized platform for investigations of ultrafast physical, chemical and biological processes. It operates in the energy range 4.7-20 keV accommodating flexible and versatile environments for a wide range of samples using diverse ultrafast X-ray spectroscopic, scattering and diffraction techniques. FXE is particularly suitable for experiments taking advantage of the sub-MHz repetition rates provided by the EuXFEL. In this paper a dedicated setup for studies on ultrafast biological and chemical dynamics in solution phase at sub-MHz rates at FXE is presented. Particular emphasis on the different liquid jet sample delivery options and their performance is given. Our portfolio of high-speed jets compatible with sub-MHz experiments includes cylindrical jets, gas dynamic virtual nozzles and flat jets. The capability to perform multi-color X-ray emission spectroscopy (XES) experiments is illustrated by a set of measurements using the dispersive X-ray spectrometer in von Hamos geometry. Static XES data collected using a multi-crystal scanning Johann-type spectrometer are also presented. A few examples of experimental results on ultrafast time-resolved X-ray emission spectroscopy and wide-angle X-ray scattering at sub-MHz pulse repetition rates are given.
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Affiliation(s)
- F. A. Lima
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
| | - F. Otte
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
- Fakultät für Physik, Technical University Dortmund, Dortmund, Germany
| | - M. Vakili
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | | | - M. Biednov
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
| | | | | | - W. Gawelda
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
- Faculty of Physics, Adam Mickiewicz University, 61-614 Poznań, Poland
| | - L. Gelisio
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
| | - H. Han
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
| | - X. Huang
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
| | - Y. Jiang
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
| | - M. Kloos
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
| | - T. Kluyver
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
| | - M. Knoll
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
| | - K. Kubicek
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
- The Hamburg Centre for Ultrafast Imaging, 22761 Hamburg, Germany
- Institut für Experimentalphysik, Universität Hamburg, 22607 Hamburg, Germany
| | | | - J. Schulz
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
| | - O. Turkot
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
| | - Y. Uemura
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
| | - J. Valerio
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
| | - H. Wang
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
| | - H. Yousef
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
| | - P. Zalden
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
| | - D. Khakhulin
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
| | - C. Bressler
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
- The Hamburg Centre for Ultrafast Imaging, 22761 Hamburg, Germany
- Institut für Experimentalphysik, Universität Hamburg, 22607 Hamburg, Germany
| | - C. Milne
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
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2
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Szczerbowska-Boruchowska M, Stec P, Czyzycki M, Szczerbowski Z, Simon R, Baumbach T, Ziomber-Lisiak A. The applicability of Fourier transform infrared microspectroscopy for correction against matrix effects in X-ray fluorescence microimaging of tissues. Spectrochim Acta A Mol Biomol Spectrosc 2023; 293:122468. [PMID: 36787676 DOI: 10.1016/j.saa.2023.122468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 02/04/2023] [Indexed: 06/18/2023]
Abstract
X-ray fluorescence (XRF) and Fourier transform infrared (FTIR) microscopy techniques are now considered popular for rapid and label-free complementary spectrochemical analysis of chemical elements and molecular systems in biological specimens. The morphological heterogeneity but also the inhomogeneities associated with the thickness/density of biological samples demonstrate challenges for the quantitative XRF microimaging. Therefore, in the present work, we proposed for the first time the application of the total absorbance under the FTIR spectra as a mass surface correction procedure for two-dimensional (2D) XRF microimaging of tissues. We also evaluated the equivalence of the developed correction method based on total absorbance of FTIR spectra with the proposed approaches based on incoherent scattering of primary X-rays as well as on the membrane Si-Kα transmission signal, on the example of selected rat organ tissues. Thin cryo-sections taken from various organs of Wistar rats were deposited on silicon nitride membranes (Si3N4). The FTIR microscopy studies were performed to collect infrared absorption spectra, used then for the determination of total absorbance values in the selected areas of tissue samples. In turn, hard X-ray imaging based on synchrotron radiation allowed the determination of characteristic radiation intensities of the elements detectable from the tissue, as well as the characteristic radiation of the membrane Si and incoherently scattered X-ray photons (Compton scattering). The latter served as correction factors for the surface mass of the sample alongside the FTIR total absorbance. The qualitative and quantitative analyses showed a high agreement between the results of elemental surface mass correction using total absorbance under FTIR spectra of tissues with those obtained using surface mass correction factors determined directly from XRF spectra. Therefore, the proposed procedure is a good alternative in cases where the surface mass effect of the sample cannot be eliminated based on the information provided directly by the XRF spectrum, as in the case of using polymer films as sample support. We have also proposed a procedure for synchronizing SRXRF and FTIR images, not limited to visual inspection of imaging/mapping data, but also enabling quantitative analysis. We found that the total absorbance determined from FTIR spectra can be successfully used as a correction factor for eliminating the surface mass effect in XRF microimaging of thin freeze-fried tissues and therefore to obtain the surface mass-independent elemental quantities. The proposed approach for 2D-FTIR-XRF analysis can also be a powerful and versatile tool for fostering a correlation and co-localization analysis to search for common distribution patterns between molecular arrangements and chemical elements.
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Affiliation(s)
| | - Patryk Stec
- AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Al. Mickiewicza 30, 30-059 Krakow, Poland
| | - Mateusz Czyzycki
- AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Al. Mickiewicza 30, 30-059 Krakow, Poland; Karlsruhe Institute of Technology, Institute for Photon Science and Synchrotron Radiation, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Zbigniew Szczerbowski
- AGH University of Science and Technology, Faculty of Geo-Data Science, Geodesy, and Environmental Enginiering, Al. Mickiewicza 30, 30-059 Krakow, Poland
| | - Rolf Simon
- Karlsruhe Institute of Technology, Institute for Photon Science and Synchrotron Radiation, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Tilo Baumbach
- Karlsruhe Institute of Technology, Institute for Photon Science and Synchrotron Radiation, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Agata Ziomber-Lisiak
- Chair of Pathophysiology, Faculty of Medicine, Jagiellonian University Medical College, ul. Czysta 18, 31-121 Krakow, Poland
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Kim JK, Dietl C, Kim HWJ, Ha SH, Kim J, Said AH, Kim J, Kim BJ. Resonant inelastic X-ray scattering endstation at the 1C beamline of Pohang Light Source II. J Synchrotron Radiat 2023; 30:643-649. [PMID: 36947164 PMCID: PMC10161893 DOI: 10.1107/s1600577523001625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 02/22/2023] [Indexed: 05/06/2023]
Abstract
An endstation for resonant inelastic X-ray scattering (RIXS), dedicated to operations in the hard X-ray regime, has been constructed at the 1C beamline of Pohang Light Source II. At the Ir L3-edge, a total energy resolution of 34.2 meV was achieved, close to the theoretical estimation of 34.0 meV, which considers factors such as the incident energy bandpass, intrinsic analyzer resolution, geometrical broadening of the spectrometer, finite beam-size effect and Johann aberration. The performance of the RIXS instrument is demonstrated by measuring the RIXS spectra of Sr2IrO4. The endstation can be easily reconfigured to measure energy-integrated intensities with very low background for diffuse scattering and diffraction experiments.
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Affiliation(s)
- Jin Kwang Kim
- Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea
| | - Christopher Dietl
- Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), 77 Cheongam-Ro, Pohang 37673, Republic of Korea
| | - Hyun Woo J Kim
- Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea
| | - Seung Hyeok Ha
- Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea
| | - Jimin Kim
- Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), 77 Cheongam-Ro, Pohang 37673, Republic of Korea
| | - Ayman H Said
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Jungho Kim
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA
| | - B J Kim
- Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea
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4
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Fernando NK, Bostrom HLB, Murray CA, Owen RL, Thompson AL, Dickerson JL, Garman EF, Cairns AB, Regoutz A. Variability in X-ray induced effects in [Rh(COD)Cl] 2 with changing experimental parameters. Phys Chem Chem Phys 2022; 24:28444-28456. [PMID: 36399064 PMCID: PMC7614095 DOI: 10.1039/d2cp03928a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
X-ray characterisation methods have undoubtedly enabled cutting-edge advances in all aspects of materials research. Despite the enormous breadth of information that can be extracted from these techniques, the challenge of radiation-induced sample change and damage remains prevalent. This is largely due to the emergence of modern, high-intensity X-ray source technologies and the growing potential to carry out more complex, longer duration in situ or in operando studies. The tunability of synchrotron beamlines enables the routine application of photon energy-dependent experiments. This work explores the structural stability of [Rh(COD)Cl]2, a widely used catalyst and precursor in the chemical industry, across a range of beamline parameters that target X-ray energies of 8 keV, 15 keV, 18 keV and 25 keV, on a powder X-ray diffraction synchrotron beamline at room temperature. Structural changes are discussed with respect to absorbed X-ray dose at each experimental setting associated with the respective photon energy. In addition, the X-ray radiation hardness of the catalyst is discussed, by utilising the diffraction data collected at the different energies to determine a dose limit, which is often considered in protein crystallography and typically overlooked in small molecule crystallography. This work not only gives fundamental insight into how damage manifests in this organometallic catalyst, but will encourage careful consideration of experimental X-ray parameters before conducting diffraction on similar radiation-sensitive organometallic materials.
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Affiliation(s)
- Nathalie K. Fernando
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK
| | - Hanna L. B. Bostrom
- Max Planck Institute for Solid State Research, Heisenbergstraße 1, 70569 Stuttgart, Germany
| | - Claire A. Murray
- Diamond Light Source Ltd, Diamond House, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, UK
| | - Robin L. Owen
- Diamond Light Source Ltd, Diamond House, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, UK
| | - Amber L. Thompson
- Chemical Crystallography, Chemistry Research Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, UK
| | - Joshua L. Dickerson
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge Biomedical Campus, Cambridge CB2 0QH, UK
| | - Elspeth F. Garman
- Department of Biochemistry, Dorothy Crowfoot Hodgkin Building, University of Oxford, South Parks Road, Oxford, OX1 3QU, UK
| | - Andrew B. Cairns
- Department of Materials, Imperial College London, Royal School of Mines, Exhibition Road, SW7 2AZ, UK
| | - Anna Regoutz
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK
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5
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Collings IE, Hanfland M. Effect of synchrotron X-ray radiation damage on phase transitions in coordination polymers at high pressure. Acta Crystallogr B Struct Sci Cryst Eng Mater 2022; 78:100-106. [PMID: 35411849 DOI: 10.1107/s2052520622001305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 02/02/2022] [Indexed: 06/14/2023]
Abstract
The high-pressure phase-transition behaviour of metal-organic frameworks and coordination polymers upon varying degrees of X-ray irradiation are highlighted with four example studies. These show that, in certain cases, the radiation damage, while not extreme in changing unit-cell values, can impact the existence of a phase transition. In particular, pressure-induced phase transitions are suppressed after a certain absorbed dose threshold is reached for the sample. This is thought to be due to partial amorphization and/or defect formation in the sample, hindering the co-operative structural distortions needed for a phase transition. The high-pressure experiments were conducted with several crystals within the sample chamber in order to measure crystals with minimal X-ray irradiation at the highest pressures, which are compared with the crystals measured continuously upon pressure increase. Ways to minimize radiation damage are also discussed within the frame of high-pressure experiments.
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Affiliation(s)
- Ines E Collings
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38043 Grenoble, France
| | - Michael Hanfland
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38043 Grenoble, France
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6
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Nanao M, Basu S, Zander U, Giraud T, Surr J, Guijarro M, Lentini M, Felisaz F, Sinoir J, Morawe C, Vivo A, Beteva A, Oscarsson M, Caserotto H, Dobias F, Flot D, Nurizzo D, Gigmes J, Foos N, Siebrecht R, Roth T, Theveneau P, Svensson O, Papp G, Lavault B, Cipriani F, Barrett R, Clavel C, Leonard G. ID23-2: an automated and high-performance microfocus beamline for macromolecular crystallography at the ESRF. J Synchrotron Radiat 2022; 29:581-590. [PMID: 35254323 PMCID: PMC8900849 DOI: 10.1107/s1600577522000984] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 01/28/2022] [Indexed: 05/30/2023]
Abstract
ID23-2 is a fixed-energy (14.2 keV) microfocus beamline at the European Synchrotron Radiation Facility (ESRF) dedicated to macromolecular crystallography. The optics and sample environment have recently been redesigned and rebuilt to take full advantage of the upgrade of the ESRF to the fourth generation Extremely Brilliant Source (ESRF-EBS). The upgraded beamline now makes use of two sets of compound refractive lenses and multilayer mirrors to obtain a highly intense (>1013 photons s-1) focused microbeam (minimum size 1.5 µm × 3 µm full width at half-maximum). The sample environment now includes a FLEX-HCD sample changer/storage system, as well as a state-of-the-art MD3Up high-precision multi-axis diffractometer. Automatic data reduction and analysis are also provided for more advanced protocols such as synchrotron serial crystallographic experiments.
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Affiliation(s)
- Max Nanao
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | - Shibom Basu
- European Molecular Biology Laboratory, 71 Avenue des Martyrs, 38042 Grenoble, France
| | - Ulrich Zander
- European Molecular Biology Laboratory, 71 Avenue des Martyrs, 38042 Grenoble, France
| | - Thierry Giraud
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | - John Surr
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | - Matias Guijarro
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | - Mario Lentini
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | - Franck Felisaz
- European Molecular Biology Laboratory, 71 Avenue des Martyrs, 38042 Grenoble, France
| | - Jeremy Sinoir
- European Molecular Biology Laboratory, 71 Avenue des Martyrs, 38042 Grenoble, France
| | - Christian Morawe
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | - Amparo Vivo
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | - Antonia Beteva
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | - Marcus Oscarsson
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | - Hugo Caserotto
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | - Fabien Dobias
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | - David Flot
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | - Didier Nurizzo
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | - Jonathan Gigmes
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | - Nicolas Foos
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | | | - Thomas Roth
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | - Pascal Theveneau
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | - Olof Svensson
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | - Gergely Papp
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | | | - Florent Cipriani
- European Molecular Biology Laboratory, 71 Avenue des Martyrs, 38042 Grenoble, France
| | - Ray Barrett
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | - Carole Clavel
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | - Gordon Leonard
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, F-38000 Grenoble, France
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Lawrence Bright E, Giacobbe C, Wright JP. Beam heating from a fourth-generation synchrotron source. J Synchrotron Radiat 2021; 28:1377-1385. [PMID: 34475286 PMCID: PMC8415326 DOI: 10.1107/s160057752100669x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Accepted: 06/26/2021] [Indexed: 06/13/2023]
Abstract
The high levels of flux available at a fourth-generation synchrotron are shown to have significant beam heating effects for high-energy X-rays and radiation hard samples, leading to temperature increases of over 400 K with a monochromatic beam. These effects have been investigated at the ID11 beamline at the recently upgraded ESRF Extremely Brilliant Source, using thermal lattice expansion to perform in situ measurements of beam heating. Results showed significant increases in temperature for metal and ceria samples, which are compared with a lumped thermodynamic model, providing a tool for estimating beam heating effects. These temperature increases may have a drastic effect on samples and measurements, such as the rapid recrystallization of a copper wire shown here. These results demonstrate the importance of beam heating and provide information needed to consider, predict and mitigate these effects.
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Affiliation(s)
| | - Carlotta Giacobbe
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38040 Grenoble, France
| | - Jonathan P. Wright
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38040 Grenoble, France
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8
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Huart L, Nicolas C, Hervé du Penhoat MA, Guigner JM, Gosse C, Palaudoux J, Lefrançois S, Mercere P, Dasilva P, Renault JP, Chevallard C. A microfluidic dosimetry cell to irradiate solutions with poorly penetrating radiations: a step towards online dosimetry for synchrotron beamlines. J Synchrotron Radiat 2021; 28:778-789. [PMID: 33949986 PMCID: PMC8127378 DOI: 10.1107/s1600577521002691] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 03/11/2021] [Indexed: 05/21/2023]
Abstract
Synchrotron radiation can induce sample damage, whether intended or not. In the case of sensitive samples, such as biological ones, modifications can be significant. To understand and predict the effects due to exposure, it is necessary to know the ionizing radiation dose deposited in the sample. In the case of aqueous samples, deleterious effects are mostly induced by the production of reactive oxygen species via water radiolysis. These species are therefore good indicators of the dose. Here the application of a microfluidic cell specifically optimized for low penetrating soft X-ray radiation is reported. Sodium benzoate was used as a fluorescent dosimeter thanks to its specific detection of hydroxyl radicals, a radiolytic product of water. Measurements at 1.28 keV led to the determination of a hydroxyl production yield, G(HO.), of 0.025 ± 0.004 µmol J-1. This result is in agreement with the literature and confirms the high linear energy transfer behavior of soft X-rays. An analysis of the important parameters of the microfluidic dosimetry cell, as well as their influences over dosimetry, is also reported.
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Affiliation(s)
- Lucie Huart
- Université Paris-Saclay, CEA, CNRS, NIMBE, 91191 Gif-sur-Yvette, France
- IMPMC, Sorbonne Université, UMR CNRS 7590, MNHN, 75005 Paris, France
- Synchrotron SOLEIL, 91 192 Saint Aubin, France
| | | | | | | | - Charlie Gosse
- Institut de Biologie de l’Ecole Normale Supérieure, ENS, CNRS, INSERM, PSL Research University, 75005 Paris, France
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9
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Jeong JH, Eo C, Kim HY, Kim JH, Lee CS, Choi HJ, Kim YG. Upgrade of BL-5C as a highly automated macromolecular crystallography beamline at Pohang Light Source II. J Synchrotron Radiat 2021; 28:602-608. [PMID: 33650572 DOI: 10.1107/s1600577521000588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Accepted: 01/17/2021] [Indexed: 06/12/2023]
Abstract
BL-5C is an in-vacuum undulator beamline dedicated to macromolecular crystallography (MX) at the 3 GeV Pohang Light Source II in Korea. The beamline delivers X-ray beams with a focal spot size of 200 µm × 40 µm (FWHM, H × V) over the energy range 6.5-16.5 keV. The measured flux is 7 × 1011 photons s-1 at 12.659 keV through an aperture size of 50 µm. The experimental station is newly equipped with the photon-counting detector EIGER 9M, the multi-axis micro-diffractometer MD2, and a robotic sample changer with a high-capacity dewar. These instruments enable the operation of this beamline as an automated MX beamline specialized in X-ray fragment screening. This beamline can collect more than 400 data sets a day without human intervention, and a difference map can be automatically calculated by using the data processing pipeline for ligand or fragment identification.
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Affiliation(s)
- Jae Hee Jeong
- Beamline Science, Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Pohang, Kyungbuk 37673, Republic of Korea
| | - Cheolsoo Eo
- Beamline Science, Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Pohang, Kyungbuk 37673, Republic of Korea
| | - Hyo Yun Kim
- Beamline Science, Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Pohang, Kyungbuk 37673, Republic of Korea
| | - Jin Hong Kim
- Beamline Science, Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Pohang, Kyungbuk 37673, Republic of Korea
| | - Chae Soon Lee
- Beamline Science, Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Pohang, Kyungbuk 37673, Republic of Korea
| | - Hyeong Joo Choi
- Beamline Science, Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Pohang, Kyungbuk 37673, Republic of Korea
| | - Yeon Gil Kim
- Beamline Science, Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Pohang, Kyungbuk 37673, Republic of Korea
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10
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Tsai H, Liu F, Shrestha S, Fernando K, Tretiak S, Scott B, Vo DT, Strzalka J, Nie W. A sensitive and robust thin-film x-ray detector using 2D layered perovskite diodes. Sci Adv 2020; 6:eaay0815. [PMID: 32300647 PMCID: PMC7148088 DOI: 10.1126/sciadv.aay0815] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Accepted: 01/14/2020] [Indexed: 05/03/2023]
Abstract
Solid-state radiation detectors, using crystalline semiconductors to convert radiation photons to electrical charges, outperform other technologies with high detectivity and sensitivity. Here, we demonstrate a thin-film x-ray detector comprised with highly crystalline two-dimensional Ruddlesden-Popper phase layered perovskites fabricated in a fully depleted p-i-n architecture. It shows high diode resistivity of 1012 ohm·cm in reverse-bias regime leading to a high x-ray detecting sensitivity up to 0.276 C Gyair -1 cm-3. Such high signal is collected by the built-in potential underpinning operation of primary photocurrent device with robust operation. The detectors generate substantial x-ray photon-induced open-circuit voltages that offer an alternative detecting mechanism. Our findings suggest a new generation of x-ray detectors based on low-cost layered perovskite thin films for future x-ray imaging technologies.
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Affiliation(s)
- Hsinhan Tsai
- Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87544, USA
| | - Fangze Liu
- Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87544, USA
| | - Shreetu Shrestha
- Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87544, USA
| | - Kasun Fernando
- Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87544, USA
| | - Sergei Tretiak
- Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87544, USA
| | - Brian Scott
- Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87544, USA
| | - Duc Ta Vo
- Nuclear Engineering and Nonproliferation, Los Alamos National Laboratory, Los Alamos, NM 87544, USA
| | - Joseph Strzalka
- X-Ray Science Division, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Wanyi Nie
- Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87544, USA
- Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
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11
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Storm SLS, Crawshaw AD, Devenish NE, Bolton R, Hall DR, Tews I, Evans G. Measuring energy-dependent photoelectron escape in microcrystals. IUCrJ 2020; 7:129-135. [PMID: 31949913 PMCID: PMC6949606 DOI: 10.1107/s2052252519016178] [Citation(s) in RCA: 3] [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] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 12/02/2019] [Indexed: 05/22/2023]
Abstract
With the increasing trend of using microcrystals and intense microbeams at synchrotron X-ray beamlines, radiation damage becomes a more pressing problem. Theoretical calculations show that the photoelectrons that primarily cause damage can escape microcrystals. This effect would become more pronounced with decreasing crystal size as well as at higher energies. To prove this effect, data from cryocooled lysozyme crystals of dimensions 5 × 3 × 3 and 20 × 8 × 8 µm mounted on cryo-transmission electron microscopy (cryo-TEM) grids were collected at 13.5 and 20.1 keV using a PILATUS CdTe 2M detector, which has a similar quantum efficiency at both energies. Accurate absorbed doses were calculated through the direct measurement of individual crystal sizes using scanning electron microscopy after the experiment and characterization of the X-ray microbeam. The crystal lifetime was then quantified based on the D 1/2 metric. In this first systematic study, a longer crystal lifetime for smaller crystals was observed and crystal lifetime increased at higher X-ray energies, supporting the theoretical predictions of photoelectron escape. The use of detector technologies specifically optimized for data collection at energies above 20 keV allows the theoretically predicted photoelectron escape to be quantified and exploited, guiding future beamline-design choices.
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Affiliation(s)
- Selina L. S. Storm
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, United Kingdom
| | - Adam D. Crawshaw
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, United Kingdom
| | - Nicholas E. Devenish
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, United Kingdom
| | - Rachel Bolton
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, United Kingdom
- Biological Sciences, Institute for Life Sciences, University of Southampton, Highfield Campus, Southampton SO17 1BJ, United Kingdom
| | - David R. Hall
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, United Kingdom
| | - Ivo Tews
- Biological Sciences, Institute for Life Sciences, University of Southampton, Highfield Campus, Southampton SO17 1BJ, United Kingdom
| | - Gwyndaf Evans
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, United Kingdom
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12
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Warren AJ, Axford D, Owen RL. Direct measurement of X-ray-induced heating of microcrystals. J Synchrotron Radiat 2019; 26:991-997. [PMID: 31274420 PMCID: PMC6613110 DOI: 10.1107/s1600577519003849] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 03/20/2019] [Indexed: 05/17/2023]
Abstract
Temperature control is a key aspect of macromolecular crystallography, with the technique of cryocooling routinely being used to mitigate X-ray-induced damage. Beam-induced heating could cause the temperature of crystals to rise above the glass transition temperature, greatly increasing the rate of damage. X-ray-induced heating of ruby crystals of 20-40 µm in size has been quantified non-invasively by monitoring the emission wavelengths of X-ray-induced fluorescence during exposure to the X-ray beam. For the beam sizes and dose rates typically used in macromolecular crystallography, the temperature rises are of the order of 20 K. The temperature changes observed are compared with models in the literature and can be used as a validation tool for future models.
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Affiliation(s)
- Anna J. Warren
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, UK
| | - Danny Axford
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, UK
| | - Robin L. Owen
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, UK
- Correspondence e-mail:
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13
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Rysov R, Roseker W, Walther M, Grübel G. Compact hard X-ray split-and-delay line for studying ultrafast dynamics at free-electron laser sources. J Synchrotron Radiat 2019; 26:1052-1057. [PMID: 31274427 PMCID: PMC6613117 DOI: 10.1107/s1600577519004570] [Citation(s) in RCA: 4] [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] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 04/03/2019] [Indexed: 05/23/2023]
Abstract
A compact hard X-ray split-and-delay line for studying ultrafast dynamics at free-electron laser sources is presented. The device is capable of splitting a single X-ray pulse into two fractions to introduce time delays from -5 to 815 ps with femtosecond resolution. The split-and-delay line can operate in a wide and continuous energy range between 7 and 16 keV. Compact dimensions of 60 × 60 × 30 cm with a total weight of about 60 kg make it portable and suitable for direct installation in an experimental hutch. The concept of the device is based on crystal diffraction. The piezo-driven stages utilized in the device give nanometre positioning accuracy. On-line monitoring systems based on X-ray cameras and intensity monitors are implemented to provide active alignment feedback. Performance estimates of the system are also presented.
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Affiliation(s)
- Rustam Rysov
- Deutsches Electronen Synchrotron, Notkestrasse 85, 22607 Hamburg, Germany
| | - Wojciech Roseker
- Deutsches Electronen Synchrotron, Notkestrasse 85, 22607 Hamburg, Germany
| | - Michael Walther
- Deutsches Electronen Synchrotron, Notkestrasse 85, 22607 Hamburg, Germany
| | - Gerhard Grübel
- Deutsches Electronen Synchrotron, Notkestrasse 85, 22607 Hamburg, Germany
- Centre for Ultrafast Imaging, Luruper Chaussee 149, 22607 Hamburg, Germany
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14
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Bugris V, Harmat V, Ferenc G, Brockhauser S, Carmichael I, Garman EF. Radiation-damage investigation of a DNA 16-mer. J Synchrotron Radiat 2019; 26:998-1009. [PMID: 31274421 DOI: 10.1107/s160057751900763x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 05/25/2019] [Indexed: 06/09/2023]
Abstract
In macromolecular crystallography, a great deal of effort has been invested in understanding radiation-damage progression. While the sensitivity of protein crystals has been well characterized, crystals of DNA and of DNA-protein complexes have not thus far been studied as thoroughly. Here, a systematic investigation of radiation damage to a crystal of a DNA 16-mer diffracting to 1.8 Å resolution and held at 100 K, up to an absorbed dose of 45 MGy, is reported. The RIDL (Radiation-Induced Density Loss) automated computational tool was used for electron-density analysis. Both the global and specific damage to the DNA crystal as a function of dose were monitored, following careful calibration of the X-ray flux and beam profile. The DNA crystal was found to be fairly radiation insensitive to both global and specific damage, with half of the initial diffraction intensity being lost at an absorbed average diffraction-weighted dose, D1/2, of 19 MGy, compared with 9 MGy for chicken egg-white lysozyme crystals under the same beam conditions but at the higher resolution of 1.4 Å. The coefficient of sensitivity of the DNA crystal was 0.014 Å2 MGy-1, which is similar to that observed for proteins. These results imply that the significantly greater radiation hardness of DNA and RNA compared with protein observed in a DNA-protein complex and an RNA-protein complex could be due to scavenging action by the protein, thereby protecting the DNA and RNA in these studies. In terms of specific damage, the regions of DNA that were found to be sensitive were those associated with some of the bound calcium ions sequestered from the crystallization buffer. In contrast, moieties farther from these sites showed only small changes even at higher doses.
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Affiliation(s)
- Valéria Bugris
- X-ray Crystallography Laboratory, Biological Research Centre, HAC-BRC, Temesvári krt. 62, Szeged 6726, Hungary
| | - Veronika Harmat
- X-ray Crystallography Laboratory, Biological Research Centre, HAC-BRC, Temesvári krt. 62, Szeged 6726, Hungary
| | - Györgyi Ferenc
- Nucleic Acid Synthesis Laboratory, Biological Research Centre, HAC-BRC, Temesvári krt. 62, Szeged 6726, Hungary
| | - Sándor Brockhauser
- X-ray Crystallography Laboratory, Biological Research Centre, HAC-BRC, Temesvári krt. 62, Szeged 6726, Hungary
| | - Ian Carmichael
- Notre Dame Radiation Laboratory, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Elspeth F Garman
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
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15
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Christensen J, Horton PN, Bury CS, Dickerson JL, Taberman H, Garman EF, Coles SJ. Radiation damage in small-molecule crystallography: fact not fiction. IUCrJ 2019; 6:703-713. [PMID: 31316814 PMCID: PMC6608633 DOI: 10.1107/s2052252519006948] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Accepted: 05/14/2019] [Indexed: 05/29/2023]
Abstract
Traditionally small-molecule crystallographers have not usually observed or recognized significant radiation damage to their samples during diffraction experiments. However, the increased flux densities provided by third-generation synchrotrons have resulted in increasing numbers of observations of this phenomenon. The diversity of types of small-molecule systems means it is not yet possible to propose a general mechanism for their radiation-induced sample decay, however characterization of the effects will permit attempts to understand and mitigate it. Here, systematic experiments are reported on the effects that sample temperature and beam attenuation have on radiation damage progression, allowing qualitative and quantitative assessment of their impact on crystals of a small-molecule test sample. To allow inter-comparison of different measurements, radiation-damage metrics (diffraction-intensity decline, resolution fall-off, scaling B-factor increase) are plotted against the absorbed dose. For ease-of-dose calculations, the software developed for protein crystallography, RADDOSE-3D, has been modified for use in small-molecule crystallography. It is intended that these initial experiments will assist in establishing protocols for small-molecule crystallographers to optimize the diffraction signal from their samples prior to the onset of the deleterious effects of radiation damage.
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Affiliation(s)
- Jeppe Christensen
- Diamond Light Source Ltd, Diamond House, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, UK
- National Crystallography Service, School of Chemistry, Faculty of Engineering and Physical Sciences, University of Southampton, Southampton SO17 1BJ, UK
| | - Peter N. Horton
- National Crystallography Service, School of Chemistry, Faculty of Engineering and Physical Sciences, University of Southampton, Southampton SO17 1BJ, UK
| | - Charles S. Bury
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
| | - Joshua L. Dickerson
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
| | - Helena Taberman
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
| | - Elspeth F. Garman
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
| | - Simon J. Coles
- National Crystallography Service, School of Chemistry, Faculty of Engineering and Physical Sciences, University of Southampton, Southampton SO17 1BJ, UK
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16
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Murata CH, Honda CJ, Lavínia NC, Caldas LV, Medeiros RB. The performance of a prototype device designed to evaluate quality parameters of radiological equipment: Complementary study. Radiat Phys Chem Oxf Engl 1993 2019; 159:131-7. [DOI: 10.1016/j.radphyschem.2019.02.034] [Citation(s) in RCA: 2] [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: 11/22/2022]
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17
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Ebrahim A, Appleby MV, Axford D, Beale J, Moreno-Chicano T, Sherrell DA, Strange RW, Hough MA, Owen RL. Resolving polymorphs and radiation-driven effects in microcrystals using fixed-target serial synchrotron crystallography. Acta Crystallogr D Struct Biol 2019; 75:151-159. [PMID: 30821704 PMCID: PMC6400251 DOI: 10.1107/s2059798318010240] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 07/16/2018] [Indexed: 11/11/2022] Open
Abstract
The ability to determine high-quality, artefact-free structures is a challenge in micro-crystallography, and the rapid onset of radiation damage and requirement for a high-brilliance X-ray beam mean that a multi-crystal approach is essential. However, the combination of crystal-to-crystal variation and X-ray-induced changes can make the formation of a final complete data set challenging; this is particularly true in the case of metalloproteins, where X-ray-induced changes occur rapidly and at the active site. An approach is described that allows the resolution, separation and structure determination of crystal polymorphs, and the tracking of radiation damage in microcrystals. Within the microcrystal population of copper nitrite reductase, two polymorphs with different unit-cell sizes were successfully separated to determine two independent structures, and an X-ray-driven change between these polymorphs was followed. This was achieved through the determination of multiple serial structures from microcrystals using a high-throughput high-speed fixed-target approach coupled with robust data processing.
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Affiliation(s)
- Ali Ebrahim
- School of Biological Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, England
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, England
| | - Martin V. Appleby
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, England
| | - Danny Axford
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, England
| | - John Beale
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, England
| | - Tadeo Moreno-Chicano
- School of Biological Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, England
| | - Darren A. Sherrell
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, England
| | - Richard W. Strange
- School of Biological Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, England
| | - Michael A. Hough
- School of Biological Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, England
| | - Robin L. Owen
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, England
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18
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Yoon PS. Customisable X-ray fluorescence photodetector with submicron sensitivity using a ring array of silicon p-i-n diodes. Sci Rep 2018; 8:15926. [PMID: 30374147 PMCID: PMC6206085 DOI: 10.1038/s41598-018-33966-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 06/07/2018] [Accepted: 10/03/2018] [Indexed: 11/09/2022] Open
Abstract
The research and development of silicon-based X-ray fluorescence detectors achieved its submicron sensitivity. Its initial use is intended for in-situ beam monitoring at advanced light-source facilities. The effectively functioning prototype fully leveraged technologies and techniques from a wide array of scientific disciplines: X-ray fluorescence technique, photon scattering and spectroscopy, astronomical photometry, semiconductor physics, materials science, microelectronics, analytical and numerical modelling, and high-performance computing. At the design stage, the systematic two-track approach was taken with the aim of attaining its submicron sensitivity: Firstly, the novel parametric method, devised for system-wide full optimisation, led to a considerable increase in detector's total solid angle (0.9 steradian), or integrated field-of-view (~3000 deg2), thus, in turn, yielding a substantial enhancement of its photon-detection efficiency. Secondly, the minimisation of all types of limiting noise sources identified resulted in a boost to detector's signal-to-noise ratio, thereby achieving its targeted range of sensitivity. The subsequent synchrotron-radiation experiment with this X-ray detector demonstrated its capability to respond to 8-keV photon beams with 600-nanometre sensitivity. This Article reports on the innovative and effective design methods, formulated for systematising the process of custom-building ultrasensitive photodetectors, and future directions.
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Affiliation(s)
- Phil S Yoon
- Brookhaven National Laboratory, P.O. Box 5000, Upton, NY, 11973-5000, USA.
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19
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Aragão D, Aishima J, Cherukuvada H, Clarken R, Clift M, Cowieson NP, Ericsson DJ, Gee CL, Macedo S, Mudie N, Panjikar S, Price JR, Riboldi-Tunnicliffe A, Rostan R, Williamson R, Caradoc-Davies TT. MX2: a high-flux undulator microfocus beamline serving both the chemical and macromolecular crystallography communities at the Australian Synchrotron. J Synchrotron Radiat 2018; 25:885-891. [PMID: 29714201 PMCID: PMC5929359 DOI: 10.1107/s1600577518003120] [Citation(s) in RCA: 256] [Impact Index Per Article: 42.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Accepted: 02/22/2018] [Indexed: 05/12/2023]
Abstract
MX2 is an in-vacuum undulator-based crystallography beamline at the 3 GeV Australian Synchrotron. The beamline delivers hard X-rays in the energy range 4.8-21 keV to a focal spot of 22 × 12 µm FWHM (H × V). At 13 keV the flux at the sample is 3.4 × 1012 photons s-1. The beamline endstation allows robotic handling of cryogenic samples via an updated SSRL SAM robot. This beamline is ideal for weakly diffracting hard-to-crystallize proteins, virus particles, protein assemblies and nucleic acids as well as smaller molecules such as inorganic catalysts and organic drug molecules. The beamline is now mature and has enjoyed a full user program for the last nine years. This paper describes the beamline status, plans for its future and some recent scientific highlights.
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Affiliation(s)
- David Aragão
- Australian Synchrotron, ANSTO, 800 Blackburn Road, Clayton, VIC 3168, Australia
| | - Jun Aishima
- Australian Synchrotron, ANSTO, 800 Blackburn Road, Clayton, VIC 3168, Australia
- ARC Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton Campus, Clayton, Victoria 3168, Australia
| | - Hima Cherukuvada
- Australian Synchrotron, ANSTO, 800 Blackburn Road, Clayton, VIC 3168, Australia
| | - Robert Clarken
- Australian Synchrotron, ANSTO, 800 Blackburn Road, Clayton, VIC 3168, Australia
| | - Mark Clift
- Australian Synchrotron, ANSTO, 800 Blackburn Road, Clayton, VIC 3168, Australia
| | - Nathan Philip Cowieson
- B21 SAXS, Diamond Light Source Ltd, Hartwell Science and Innovation Campus, Didcot OX11 0DE, England
| | | | - Christine L. Gee
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, California, USA
- California Institute for Quantitative Biosciences, University of California, Berkeley, Berkeley, California, USA
- Howard Hughes Medical Institute, University of California, Berkeley, Berkeley, California, USA
| | - Sofia Macedo
- Australian Synchrotron, ANSTO, 800 Blackburn Road, Clayton, VIC 3168, Australia
| | - Nathan Mudie
- Australian Synchrotron, ANSTO, 800 Blackburn Road, Clayton, VIC 3168, Australia
| | - Santosh Panjikar
- Australian Synchrotron, ANSTO, 800 Blackburn Road, Clayton, VIC 3168, Australia
| | - Jason Roy Price
- Australian Synchrotron, ANSTO, 800 Blackburn Road, Clayton, VIC 3168, Australia
| | | | - Robert Rostan
- Australian Synchrotron, ANSTO, 800 Blackburn Road, Clayton, VIC 3168, Australia
| | - Rachel Williamson
- Australian Synchrotron, ANSTO, 800 Blackburn Road, Clayton, VIC 3168, Australia
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20
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Karydas AG, Czyzycki M, Leani JJ, Migliori A, Osan J, Bogovac M, Wrobel P, Vakula N, Padilla-Alvarez R, Menk RH, Gol MG, Antonelli M, Tiwari MK, Caliri C, Vogel-Mikuš K, Darby I, Kaiser RB. An IAEA multi-technique X-ray spectrometry endstation at Elettra Sincrotrone Trieste: benchmarking results and interdisciplinary applications. J Synchrotron Radiat 2018; 25:189-203. [PMID: 29271768 DOI: 10.1107/s1600577517016332] [Citation(s) in RCA: 16] [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] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Accepted: 11/13/2017] [Indexed: 06/07/2023]
Abstract
The International Atomic Energy Agency (IAEA) jointly with the Elettra Sincrotrone Trieste (EST) operates a multipurpose X-ray spectrometry endstation at the X-ray Fluorescence beamline (10.1L). The facility has been available to external users since the beginning of 2015 through the peer-review process of EST. Using this collaboration framework, the IAEA supports and promotes synchrotron-radiation-based research and training activities for various research groups from the IAEA Member States, especially those who have limited previous experience and resources to access a synchrotron radiation facility. This paper aims to provide a broad overview about various analytical capabilities, intrinsic features and performance figures of the IAEA X-ray spectrometry endstation through the measured results. The IAEA-EST endstation works with monochromatic X-rays in the energy range 3.7-14 keV for the Elettra storage ring operating at 2.0 or 2.4 GeV electron energy. It offers a combination of different advanced analytical probes, e.g. X-ray reflectivity, X-ray absorption fine-structure measurements, grazing-incidence X-ray fluorescence measurements, using different excitation and detection geometries, and thereby supports a comprehensive characterization for different kinds of nanostructured and bulk materials.
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Affiliation(s)
- Andreas Germanos Karydas
- Nuclear Science and Instrumentation Laboratory, International Atomic Energy Agency (IAEA) Laboratories, A-2444 Seibersdorf, Austria
| | - Mateusz Czyzycki
- Nuclear Science and Instrumentation Laboratory, International Atomic Energy Agency (IAEA) Laboratories, A-2444 Seibersdorf, Austria
| | - Juan José Leani
- Nuclear Science and Instrumentation Laboratory, International Atomic Energy Agency (IAEA) Laboratories, A-2444 Seibersdorf, Austria
| | - Alessandro Migliori
- Nuclear Science and Instrumentation Laboratory, International Atomic Energy Agency (IAEA) Laboratories, A-2444 Seibersdorf, Austria
| | - Janos Osan
- Nuclear Science and Instrumentation Laboratory, International Atomic Energy Agency (IAEA) Laboratories, A-2444 Seibersdorf, Austria
| | - Mladen Bogovac
- Nuclear Science and Instrumentation Laboratory, International Atomic Energy Agency (IAEA) Laboratories, A-2444 Seibersdorf, Austria
| | - Pawel Wrobel
- AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Al. A. Mickiewicza 30, 30-059 Krakow, Poland
| | - Nikita Vakula
- Nuclear Science and Instrumentation Laboratory, International Atomic Energy Agency (IAEA) Laboratories, A-2444 Seibersdorf, Austria
| | - Roman Padilla-Alvarez
- Nuclear Science and Instrumentation Laboratory, International Atomic Energy Agency (IAEA) Laboratories, A-2444 Seibersdorf, Austria
| | - Ralf Hendrik Menk
- Elettra-Sincrotrone Trieste SCpA di Interesse Nazionale, 34149 Basovizza, Trieste, Italy
| | - Maryam Ghahremani Gol
- Institute for Research in Fundamental Sciences (IPM), Iranian Light Source Facility (ILSF), Larak Building (Garden), PO Box 19568-36484, Tehran, Iran
| | - Matias Antonelli
- Elettra-Sincrotrone Trieste SCpA di Interesse Nazionale, 34149 Basovizza, Trieste, Italy
| | - Manoj K Tiwari
- Synchrotrons Utilization Section, Raja Ramanna Centre for Advanced Technology, Indore 452013, Madhya Pradesh, India
| | - Claudia Caliri
- Laboratori Nazionali del Sud, INFN, Via Santa Sofia 62, Catania 95123, Italy
| | - Katarina Vogel-Mikuš
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, Ljubljana, Slovenia
| | - Iain Darby
- Nuclear Science and Instrumentation Laboratory, International Atomic Energy Agency (IAEA) Laboratories, A-2444 Seibersdorf, Austria
| | - Ralf Bernd Kaiser
- Nuclear Science and Instrumentation Laboratory, International Atomic Energy Agency (IAEA) Laboratories, A-2444 Seibersdorf, Austria
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21
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Bury CS, Brooks-Bartlett JC, Walsh SP, Garman EF. Estimate your dose: RADDOSE-3D. Protein Sci 2017; 27:217-228. [PMID: 28921782 DOI: 10.1002/pro.3302] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [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: 07/14/2017] [Revised: 09/10/2017] [Accepted: 09/11/2017] [Indexed: 12/22/2022]
Abstract
We present the current status of RADDOSE-3D, a software tool allowing the estimation of the dose absorbed in a macromolecular crystallography diffraction experiment. The code allows a temporal and spatial dose contour map to be calculated for a crystal of any geometry and size as it is rotated in an X-ray beam, and gives several summary dose values: among them diffraction weighted dose. This allows experimenters to plan data collections which will minimize radiation damage effects by spreading the absorbed dose more homogeneously, and thus to optimize the use of their crystals. It also allows quantitative comparisons between different radiation damage studies, giving a universal "x-axis" against which to plot various metrics.
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Affiliation(s)
- Charles S Bury
- Department of Biochemistry, South Parks Road, Oxford, OX1 3QU, United Kingdom
| | | | - Steven P Walsh
- Department of Biochemistry, South Parks Road, Oxford, OX1 3QU, United Kingdom
| | - Elspeth F Garman
- Department of Biochemistry, South Parks Road, Oxford, OX1 3QU, United Kingdom
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22
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Abstract
Radiation damage inflicted on macromolecular crystals during X-ray diffraction experiments remains a limiting factor for structure solution, even when samples are cooled to cryotemperatures (~100 K). Efforts to establish mitigation strategies are ongoing and various approaches, summarized below, have been investigated over the last 15 years, resulting in a deeper understanding of the physical and chemical factors affecting damage rates. The recent advent of X-ray free electron lasers permits "diffraction-before-destruction" by providing highly brilliant and short (a few tens of fs) X-ray pulses. New fourth generation synchrotron sources now coming on line with higher X-ray flux densities than those available from third generation synchrotrons will bring the issue of radiation damage once more to the fore for structural biologists.
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Affiliation(s)
- Elspeth F Garman
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford, OX1 3QU, UK.
| | - Martin Weik
- Institut de Biologie Structurale, University of Grenoble Alpes, CEA, CNRS, 71 Avenue des Martyrs, 38044, Grenoble, France.
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23
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Brooks-Bartlett JC, Batters RA, Bury CS, Lowe ED, Ginn HM, Round A, Garman EF. Development of tools to automate quantitative analysis of radiation damage in SAXS experiments. J Synchrotron Radiat 2017; 24:63-72. [PMID: 28009547 PMCID: PMC5182020 DOI: 10.1107/s1600577516015083] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Accepted: 09/23/2016] [Indexed: 05/09/2023]
Abstract
Biological small-angle X-ray scattering (SAXS) is an increasingly popular technique used to obtain nanoscale structural information on macromolecules in solution. However, radiation damage to the samples limits the amount of useful data that can be collected from a single sample. In contrast to the extensive analytical resources available for macromolecular crystallography (MX), there are relatively few tools to quantitate radiation damage for SAXS, some of which require a significant level of manual characterization, with the potential of leading to conflicting results from different studies. Here, computational tools have been developed to automate and standardize radiation damage analysis for SAXS data. RADDOSE-3D, a dose calculation software utility originally written for MX experiments, has been extended to account for the cylindrical geometry of the capillary tube, the liquid composition of the sample and the attenuation of the beam by the capillary material to allow doses to be calculated for many SAXS experiments. Furthermore, a library has been written to visualize and explore the pairwise similarity of frames. The calculated dose for the frame at which three subsequent frames are determined to be dissimilar is defined as the radiation damage onset threshold (RDOT). Analysis of RDOTs has been used to compare the efficacy of radioprotectant compounds to extend the useful lifetime of SAXS samples. Comparison of the RDOTs shows that, for radioprotectant compounds at 5 and 10 mM concentration, glycerol is the most effective compound. However, at 1 and 2 mM concentrations, dithiothreitol (DTT) appears to be most effective. Our newly developed visualization library contains methods that highlight the unusual radiation damage results given by SAXS data collected using higher concentrations of DTT: these observations should pave the way to the development of more sophisticated frame merging strategies.
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Affiliation(s)
| | | | - Charles S. Bury
- Department of Biochemistry, University of Oxford, Oxford OX1 3QU, UK
| | - Edward D. Lowe
- Department of Biochemistry, University of Oxford, Oxford OX1 3QU, UK
| | - Helen Mary Ginn
- Division of Structural Biology, Wellcome Trust Centre for Human Genetics, Roosevelt Drive, Oxford OX3 7BN, UK
| | - Adam Round
- European Molecular Biology Laboratory, Grenoble Outstation, 71 avenue des Martyrs, CS 90181, 38042 Grenoble, France
- SPB/SFX European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
- Faculty of Natural Sciences, Keele University, Staffordshire ST5 5BG, UK
| | - Elspeth F. Garman
- Department of Biochemistry, University of Oxford, Oxford OX1 3QU, UK
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24
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Rakowski JT, Tucker MA, Snyder MG, Makar SP, Yudele M, Burmeister J, Joiner MC. Extrapolation Ionization Chamber Dosimetry of Fluorescent X-Ray Energies from 4.5 to 19.6 keV. Radiat Res 2016; 186:283-91. [PMID: 27548518 DOI: 10.1667/rr14384.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Characteristic X rays of energies less than approximately 20 keV are of interest in radiobiology and radiation oncology. There is evidence that these low-energy photons produce higher relative biological effectiveness (RBE) and lower oxygen enhancement ratio (OER) relative to higher energies. Lower energy X rays also offer the advantage of healthy tissue sparing beyond the target treatment depth. Electronic brachytherapy systems that can deliver characteristic and bremsstrahlung X rays of varying energy are in clinical use as well as under development. We performed low-energy extrapolation ionization chamber dosimetry using two methods: 1. the exposure-to-dose method; and 2. the Burlin theory method combined with the extrapolation chamber method of Klevenhagen. We investigated fluorescent X rays emitted from seven metals: titanium (Ti, Z = 22); chromium (Cr, Z = 24); iron (Fe, Z = 26); cobalt (Co, Z = 27); copper (Cu, Z = 29); zinc (Zn, Z = 30); and molybdenum (Mo, Z = 42). X rays were produced by irradiation of the metals with a 55 kVp, 45 mA silver anode spectrum. The data obtained were air kerma rate (cGy/min), and radiation dose rate (cGy/min) in phosphate-buffered saline (PBS) solution and water. Air kerma rates ranged from 3.55 ± 0.10 to 14.36 ± 0.39 cGy/min. Dose rates ranged from 3.85 ± 0.10 to 16.96 ± 0.46 cGy/min in PBS and 3.59 ± 0.10 to 16.06 ± 0.43 cGy/min in water. Dose-rate energy dependence of both models was examined by taking a ratio of measured to Monte Carlo calculated dose rates. Dosimetry method 1 exhibited a linear relationship across all energies with a slope of 0.0127 keV(-1) and R(2) of 0.9276. Method 2 exhibited a linear relationship across all energies with a slope of 0.0467 keV(-1) and R(2) of 0.9933. Method 1 or 2 may be used as a relative dosimetry system to derive dose rates to water by using a second reference ion chamber with a NIST-traceable calibration for the molybdenum spectrum.
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Affiliation(s)
- Joseph T Rakowski
- a Department of Radiation Oncology, Wayne State University School of Medicine, Detroit, Michigan
| | - Mark A Tucker
- b Department of Radiation Oncology, Missouri Cancer Associates, Columbia, Missouri
| | - Michael G Snyder
- a Department of Radiation Oncology, Wayne State University School of Medicine, Detroit, Michigan
| | - Simon P Makar
- c Department of Radiation Oncology, Horizon Medical Services, Coral Springs, Florida; and
| | - Mark Yudele
- d Department of Radiation Oncology, McLaren-Macomb, Mt. Clemens, Michigan
| | - Jay Burmeister
- a Department of Radiation Oncology, Wayne State University School of Medicine, Detroit, Michigan
| | - Michael C Joiner
- a Department of Radiation Oncology, Wayne State University School of Medicine, Detroit, Michigan
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25
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Liebschner D, Yamada Y, Matsugaki N, Senda M, Senda T. On the influence of crystal size and wavelength on native SAD phasing. Acta Crystallogr D Struct Biol 2016; 72:728-41. [PMID: 27303793 DOI: 10.1107/s2059798316005349] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2015] [Accepted: 03/29/2016] [Indexed: 11/11/2022]
Abstract
Native SAD is an emerging phasing technique that uses the anomalous signal of native heavy atoms to obtain crystallographic phases. The method does not require specific sample preparation to add anomalous scatterers, as the light atoms contained in the native sample are used as marker atoms. The most abundant anomalous scatterer used for native SAD, which is present in almost all proteins, is sulfur. However, the absorption edge of sulfur is at low energy (2.472 keV = 5.016 Å), which makes it challenging to carry out native SAD phasing experiments as most synchrotron beamlines are optimized for shorter wavelength ranges where the anomalous signal of sulfur is weak; for longer wavelengths, which produce larger anomalous differences, the absorption of X-rays by the sample, solvent, loop and surrounding medium (e.g. air) increases tremendously. Therefore, a compromise has to be found between measuring strong anomalous signal and minimizing absorption. It was thus hypothesized that shorter wavelengths should be used for large crystals and longer wavelengths for small crystals, but no thorough experimental analyses have been reported to date. To study the influence of crystal size and wavelength, native SAD experiments were carried out at different wavelengths (1.9 and 2.7 Å with a helium cone; 3.0 and 3.3 Å with a helium chamber) using lysozyme and ferredoxin reductase crystals of various sizes. For the tested crystals, the results suggest that larger sample sizes do not have a detrimental effect on native SAD data and that long wavelengths give a clear advantage with small samples compared with short wavelengths. The resolution dependency of substructure determination was analyzed and showed that high-symmetry crystals with small unit cells require higher resolution for the successful placement of heavy atoms.
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Affiliation(s)
- Dorothee Liebschner
- Structural Biology Research Center, Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba 305-0801, Japan
| | - Yusuke Yamada
- Structural Biology Research Center, Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba 305-0801, Japan
| | - Naohiro Matsugaki
- Structural Biology Research Center, Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba 305-0801, Japan
| | - Miki Senda
- Structural Biology Research Center, Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba 305-0801, Japan
| | - Toshiya Senda
- Structural Biology Research Center, Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba 305-0801, Japan
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26
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Göries D, Dicke B, Roedig P, Stübe N, Meyer J, Galler A, Gawelda W, Britz A, Geßler P, Sotoudi Namin H, Beckmann A, Schlie M, Warmer M, Naumova M, Bressler C, Rübhausen M, Weckert E, Meents A. Time-resolved pump and probe x-ray absorption fine structure spectroscopy at beamline P11 at PETRA III. Rev Sci Instrum 2016; 87:053116. [PMID: 27250401 DOI: 10.1063/1.4948596] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We report about the development and implementation of a new setup for time-resolved X-ray absorption fine structure spectroscopy at beamline P11 utilizing the outstanding source properties of the low-emittance PETRA III synchrotron storage ring in Hamburg. Using a high intensity micrometer-sized X-ray beam in combination with two positional feedback systems, measurements were performed on the transition metal complex fac-Tris[2-phenylpyridinato-C2,N]iridium(III) also referred to as fac-Ir(ppy)3. This compound is a representative of the phosphorescent iridium(III) complexes, which play an important role in organic light emitting diode (OLED) technology. The experiment could directly prove the anticipated photoinduced charge transfer reaction. Our results further reveal that the temporal resolution of the experiment is limited by the PETRA III X-ray bunch length of ∼103 ps full width at half maximum (FWHM).
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Affiliation(s)
- D Göries
- DESY Photon Science, Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, 22607 Hamburg, Germany
| | - B Dicke
- Center for Free-Electron Laser Science (CFEL), Luruper Chaussee 149, 22761 Hamburg, Germany
| | - P Roedig
- DESY Photon Science, Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, 22607 Hamburg, Germany
| | - N Stübe
- DESY Photon Science, Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, 22607 Hamburg, Germany
| | - J Meyer
- DESY Photon Science, Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, 22607 Hamburg, Germany
| | - A Galler
- European XFEL, Albert-Einstein Ring 19, 22761 Hamburg, Germany
| | - W Gawelda
- European XFEL, Albert-Einstein Ring 19, 22761 Hamburg, Germany
| | - A Britz
- European XFEL, Albert-Einstein Ring 19, 22761 Hamburg, Germany
| | - P Geßler
- European XFEL, Albert-Einstein Ring 19, 22761 Hamburg, Germany
| | - H Sotoudi Namin
- European XFEL, Albert-Einstein Ring 19, 22761 Hamburg, Germany
| | - A Beckmann
- European XFEL, Albert-Einstein Ring 19, 22761 Hamburg, Germany
| | - M Schlie
- Institut für Experimentalphysik, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - M Warmer
- DESY Photon Science, Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, 22607 Hamburg, Germany
| | - M Naumova
- Center for Free-Electron Laser Science (CFEL), Luruper Chaussee 149, 22761 Hamburg, Germany
| | - C Bressler
- European XFEL, Albert-Einstein Ring 19, 22761 Hamburg, Germany
| | - M Rübhausen
- Center for Free-Electron Laser Science (CFEL), Luruper Chaussee 149, 22761 Hamburg, Germany
| | - E Weckert
- DESY Photon Science, Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, 22607 Hamburg, Germany
| | - A Meents
- DESY Photon Science, Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, 22607 Hamburg, Germany
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27
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de Sanctis D, Zubieta C, Felisaz F, Caserotto H, Nanao MH. Radiation-damage-induced phasing: a case study using UV irradiation with light-emitting diodes. Acta Crystallogr D Struct Biol 2016; 72:395-402. [PMID: 26960126 PMCID: PMC4784670 DOI: 10.1107/s2059798315021658] [Citation(s) in RCA: 6] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Accepted: 11/15/2015] [Indexed: 11/16/2022]
Abstract
A case study of radiation-damage-induced phasing is discussed using ultraviolet light-emitting diodes to induce specific radiation damage. Exposure to X-rays, high-intensity visible light or ultraviolet radiation results in alterations to protein structure such as the breakage of disulfide bonds, the loss of electron density at electron-rich centres and the movement of side chains. These specific changes can be exploited in order to obtain phase information. Here, a case study using insulin to illustrate each step of the radiation-damage-induced phasing (RIP) method is presented. Unlike a traditional X-ray-induced damage step, specific damage is introduced via ultraviolet light-emitting diodes (UV-LEDs). In contrast to UV lasers, UV-LEDs have the advantages of small size, low cost and relative ease of use.
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Affiliation(s)
- Daniele de Sanctis
- ESRF, The European Synchrotron, 71 Rue des Martyrs, 38000 Grenoble, France
| | - Chloe Zubieta
- CNRS, Université Grenoble Alpes, CEA, DSV, INRA, iRTSV, Laboratoire de Physiologie Cellulaire and Végétale, UMR 5168, 38054 Grenoble, France
| | - Franck Felisaz
- European Molecular Biology Laboratory, 71 avenue des Martyrs, CS 90181, F-38042 Grenoble Cedex 9, France
| | - Hugo Caserotto
- ESRF, The European Synchrotron, 71 Rue des Martyrs, 38000 Grenoble, France
| | - Max H Nanao
- European Molecular Biology Laboratory, 71 avenue des Martyrs, CS 90181, F-38042 Grenoble Cedex 9, France
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28
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Abstract
Although crystallographers typically seek to mitigate radiation damage in macromolecular crystals, in some cases, radiation damage to specific atoms can be used to determine phases de novo. This process is called radiation damage-induced phasing or "RIP." Here, we provide a general overview of the method and a practical set of data collection and processing strategies for phasing macromolecular structures using RIP.
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Affiliation(s)
- Chloe Zubieta
- Structural Biology Group, European Synchrotron Radiation Facility, Grenoble, France
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29
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Serrano-Posada H, Centeno-Leija S, Rojas-Trejo SP, Rodríguez-Almazán C, Stojanoff V, Rudiño-Piñera E. X-ray-induced catalytic active-site reduction of a multicopper oxidase: structural insights into the proton-relay mechanism and O2-reduction states. Acta Crystallogr D Biol Crystallogr 2015; 71:2396-411. [PMID: 26627648 PMCID: PMC4934174 DOI: 10.1107/s1399004715018714] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Accepted: 10/05/2015] [Indexed: 12/14/2022]
Abstract
During X-ray data collection from a multicopper oxidase (MCO) crystal, electrons and protons are mainly released into the system by the radiolysis of water molecules, leading to the X-ray-induced reduction of O2 to 2H2O at the trinuclear copper cluster (TNC) of the enzyme. In this work, 12 crystallographic structures of Thermus thermophilus HB27 multicopper oxidase (Tth-MCO) in holo, apo and Hg-bound forms and with different X-ray absorbed doses have been determined. In holo Tth-MCO structures with four Cu atoms, the proton-donor residue Glu451 involved in O2 reduction was found in a double conformation: Glu451a (∼7 Å from the TNC) and Glu451b (∼4.5 Å from the TNC). A positive peak of electron density above 3.5σ in an Fo - Fc map for Glu451a O(ℇ2) indicates the presence of a carboxyl functional group at the side chain, while its significant absence in Glu451b strongly suggests a carboxylate functional group. In contrast, for apo Tth-MCO and in Hg-bound structures neither the positive peak nor double conformations were observed. Together, these observations provide the first structural evidence for a proton-relay mechanism in the MCO family and also support previous studies indicating that Asp106 does not provide protons for this mechanism. In addition, eight composite structures (Tth-MCO-C1-8) with different X-ray-absorbed doses allowed the observation of different O2-reduction states, and a total depletion of T2Cu at doses higher than 0.2 MGy showed the high susceptibility of this Cu atom to radiation damage, highlighting the importance of taking radiation effects into account in biochemical interpretations of an MCO structure.
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Affiliation(s)
- Hugo Serrano-Posada
- Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Avenida Universidad 2001, 62210 Cuernavaca, MOR, Mexico
- Departamento de Biología Molecular y Biotecnología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 México, DF, Mexico
| | - Sara Centeno-Leija
- Departamento de Biología Molecular y Biotecnología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 México, DF, Mexico
| | - Sonia Patricia Rojas-Trejo
- Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Avenida Universidad 2001, 62210 Cuernavaca, MOR, Mexico
| | - Claudia Rodríguez-Almazán
- Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Avenida Universidad 2001, 62210 Cuernavaca, MOR, Mexico
| | - Vivian Stojanoff
- NSLS, Brookhaven National Laboratory, 75 Brookhaven Avenue, Building 725D, Upton, NY 11973-5000, USA
| | - Enrique Rudiño-Piñera
- Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Avenida Universidad 2001, 62210 Cuernavaca, MOR, Mexico
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30
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Blanchet CE, Hermes C, Svergun DI, Fiedler S. A small and robust active beamstop for scattering experiments on high-brilliance undulator beamlines. J Synchrotron Radiat 2015; 22:461-4. [PMID: 25723949 PMCID: PMC4344362 DOI: 10.1107/s160057751402829x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Accepted: 12/31/2014] [Indexed: 05/24/2023]
Abstract
A small active in-vacuum beamstop has been developed to monitor the flux of intense third-generation synchrotron X-ray beams protecting the downstream detector from the direct beam. Standard active beamstops, where a built-in diode directly absorbs the beam, have limitations in size and lifetime. In the present design, a silicon PIN diode detects the photons back-scattered from a cavity in the beamstop. This approach drastically reduces the radiation dose on the diode and thus increases its lifetime. The beamstop with a diameter of 2 mm has been fabricated to meet the requirements for the P12 bioSAXS beamline of EMBL Hamburg at PETRA III (DESY). The beamstop is in regular user operation at the beamline and displays a good response over the range of energies tested (6-20 keV). Further miniaturization of the diode is easily possible as its size is not limited by the PIN diode used.
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Affiliation(s)
- Clement E. Blanchet
- European Molecular Biology Laboratory, Hamburg Outstation c/o DESY, Notkestrasse 85, 22603 Hamburg, Germany
| | - Christoph Hermes
- European Molecular Biology Laboratory, Hamburg Outstation c/o DESY, Notkestrasse 85, 22603 Hamburg, Germany
| | - Dmitri I. Svergun
- European Molecular Biology Laboratory, Hamburg Outstation c/o DESY, Notkestrasse 85, 22603 Hamburg, Germany
| | - Stefan Fiedler
- European Molecular Biology Laboratory, Hamburg Outstation c/o DESY, Notkestrasse 85, 22603 Hamburg, Germany
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31
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Bury C, Garman EF, Ginn HM, Ravelli RBG, Carmichael I, Kneale G, McGeehan JE. Radiation damage to nucleoprotein complexes in macromolecular crystallography. J Synchrotron Radiat 2015; 22:213-24. [PMID: 25723923 PMCID: PMC4344358 DOI: 10.1107/s1600577514026289] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 11/30/2014] [Indexed: 05/23/2023]
Abstract
Significant progress has been made in macromolecular crystallography over recent years in both the understanding and mitigation of X-ray induced radiation damage when collecting diffraction data from crystalline proteins. In contrast, despite the large field that is productively engaged in the study of radiation chemistry of nucleic acids, particularly of DNA, there are currently very few X-ray crystallographic studies on radiation damage mechanisms in nucleic acids. Quantitative comparison of damage to protein and DNA crystals separately is challenging, but many of the issues are circumvented by studying pre-formed biological nucleoprotein complexes where direct comparison of each component can be made under the same controlled conditions. Here a model protein-DNA complex C.Esp1396I is employed to investigate specific damage mechanisms for protein and DNA in a biologically relevant complex over a large dose range (2.07-44.63 MGy). In order to allow a quantitative analysis of radiation damage sites from a complex series of macromolecular diffraction data, a computational method has been developed that is generally applicable to the field. Typical specific damage was observed for both the protein on particular amino acids and for the DNA on, for example, the cleavage of base-sugar N1-C and sugar-phosphate C-O bonds. Strikingly the DNA component was determined to be far more resistant to specific damage than the protein for the investigated dose range. At low doses the protein was observed to be susceptible to radiation damage while the DNA was far more resistant, damage only being observed at significantly higher doses.
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Affiliation(s)
- Charles Bury
- Laboratory of Molecular Biophysics, Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
| | - Elspeth F. Garman
- Laboratory of Molecular Biophysics, Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
| | - Helen Mary Ginn
- Laboratory of Molecular Biophysics, Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
| | - Raimond B. G. Ravelli
- Institute of Nanoscopy, Maastricht University, PO Box 616, Maastricht 6200 MD, The Netherlands
| | - Ian Carmichael
- Notre Dame Radiation Laboratory, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Geoff Kneale
- Molecular Biophysics, Institute of Biomedical and Biomolecular Sciences, University of Portsmouth, King Henry 1st Street, Portsmouth PO1 2DY, UK
| | - John E. McGeehan
- Molecular Biophysics, Institute of Biomedical and Biomolecular Sciences, University of Portsmouth, King Henry 1st Street, Portsmouth PO1 2DY, UK
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32
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Cowieson NP, Aragao D, Clift M, Ericsson DJ, Gee C, Harrop SJ, Mudie N, Panjikar S, Price JR, Riboldi-Tunnicliffe A, Williamson R, Caradoc-Davies T. MX1: a bending-magnet crystallography beamline serving both chemical and macromolecular crystallography communities at the Australian Synchrotron. J Synchrotron Radiat 2015; 22:187-90. [PMID: 25537608 PMCID: PMC4294030 DOI: 10.1107/s1600577514021717] [Citation(s) in RCA: 274] [Impact Index Per Article: 30.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Accepted: 10/01/2014] [Indexed: 05/12/2023]
Abstract
MX1 is a bending-magnet crystallography beamline at the 3 GeV Australian Synchrotron. The beamline delivers hard X-rays in the energy range from 8 to 18 keV to a focal spot at the sample position of 120 µm FWHM. The beamline endstation and ancillary equipment facilitate local and remote access for both chemical and biological macromolecular crystallography. Here, the design of the beamline and endstation are discussed. The beamline has enjoyed a full user program for the last seven years and scientific highlights from the user program are also presented.
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Affiliation(s)
- Nathan Philip Cowieson
- MX Beamlines, Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria 3168, Australia
| | - David Aragao
- MX Beamlines, Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria 3168, Australia
| | - Mark Clift
- MX Beamlines, Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria 3168, Australia
| | - Daniel J. Ericsson
- MX Beamlines, Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria 3168, Australia
| | - Christine Gee
- MX Beamlines, Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria 3168, Australia
| | - Stephen J. Harrop
- MX Beamlines, Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria 3168, Australia
| | - Nathan Mudie
- MX Beamlines, Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria 3168, Australia
| | - Santosh Panjikar
- MX Beamlines, Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria 3168, Australia
| | - Jason R. Price
- MX Beamlines, Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria 3168, Australia
| | | | - Rachel Williamson
- MX Beamlines, Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria 3168, Australia
| | - Tom Caradoc-Davies
- MX Beamlines, Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria 3168, Australia
- Correspondence e-mail:
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33
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Kroon-Batenburg LMJ, Helliwell JR. Experiences with making diffraction image data available: what metadata do we need to archive? Acta Crystallogr D Biol Crystallogr 2014; 70:2502-9. [PMID: 25286836 PMCID: PMC4187998 DOI: 10.1107/s1399004713029817] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Accepted: 10/30/2013] [Indexed: 11/23/2022]
Abstract
Recently, the IUCr (International Union of Crystallography) initiated the formation of a Diffraction Data Deposition Working Group with the aim of developing standards for the representation of raw diffraction data associated with the publication of structural papers. Archiving of raw data serves several goals: to improve the record of science, to verify the reproducibility and to allow detailed checks of scientific data, safeguarding against fraud and to allow reanalysis with future improved techniques. A means of studying this issue is to submit exemplar publications with associated raw data and metadata. In a recent study of the binding of cisplatin and carboplatin to histidine in lysozyme crystals under several conditions, the possible effects of the equipment and X-ray diffraction data-processing software on the occupancies and B factors of the bound Pt compounds were compared. Initially, 35.3 GB of data were transferred from Manchester to Utrecht to be processed with EVAL. A detailed description and discussion of the availability of metadata was published in a paper that was linked to a local raw data archive at Utrecht University and also mirrored at the TARDIS raw diffraction data archive in Australia. By making these raw diffraction data sets available with the article, it is possible for the diffraction community to make their own evaluation. This led to one of the authors of XDS (K. Diederichs) to re-integrate the data from crystals that supposedly solely contained bound carboplatin, resulting in the analysis of partially occupied chlorine anomalous electron densities near the Pt-binding sites and the use of several criteria to more carefully assess the diffraction resolution limit. General arguments for archiving raw data, the possibilities of doing so and the requirement of resources are discussed. The problems associated with a partially unknown experimental setup, which preferably should be available as metadata, is discussed. Current thoughts on data compression are summarized, which could be a solution especially for pixel-device data sets with fine slicing that may otherwise present an unmanageable amount of data.
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Affiliation(s)
- Loes M. J. Kroon-Batenburg
- Crystal and Structural Chemistry, Bijvoet Center for Biomolecular Research, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - John R. Helliwell
- School of Chemistry, Faculty of Engineering and Physical Sciences, University of Manchester, Brunswick Street, Manchester M14 9PL, England
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Owen RL, Paterson N, Axford D, Aishima J, Schulze-Briese C, Ren J, Fry EE, Stuart DI, Evans G. Exploiting fast detectors to enter a new dimension in room-temperature crystallography. Acta Crystallogr D Biol Crystallogr 2014; 70:1248-56. [PMID: 24816094 PMCID: PMC4014120 DOI: 10.1107/s1399004714005379] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Accepted: 03/09/2014] [Indexed: 11/11/2022]
Abstract
A departure from a linear or an exponential intensity decay in the diffracting power of protein crystals as a function of absorbed dose is reported. The observation of a lag phase raises the possibility of collecting significantly more data from crystals held at room temperature before an intolerable intensity decay is reached. A simple model accounting for the form of the intensity decay is reintroduced and is applied for the first time to high frame-rate room-temperature data collection.
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Affiliation(s)
- Robin L. Owen
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, England
| | - Neil Paterson
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, England
| | - Danny Axford
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, England
| | - Jun Aishima
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, England
| | | | - Jingshan Ren
- Division of Structural Biology, University of Oxford, The Henry Wellcome Building for Genomic Medicine, Roosevelt Drive, Oxford OX3 7BN, England
| | - Elizabeth E. Fry
- Division of Structural Biology, University of Oxford, The Henry Wellcome Building for Genomic Medicine, Roosevelt Drive, Oxford OX3 7BN, England
| | - David I. Stuart
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, England
- Division of Structural Biology, University of Oxford, The Henry Wellcome Building for Genomic Medicine, Roosevelt Drive, Oxford OX3 7BN, England
| | - Gwyndaf Evans
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, England
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Harty PD, Lye JE, Ramanathan G, Butler DJ, Hall CJ, Stevenson AW, Johnston PN. Absolute x-ray dosimetry on a synchrotron medical beam line with a graphite calorimeter. Med Phys 2014; 41:052101. [DOI: 10.1118/1.4870387] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Zeldin OB, Brockhauser S, Bremridge J, Holton JM, Garman EF. Predicting the X-ray lifetime of protein crystals. Proc Natl Acad Sci U S A 2013; 110:20551-6. [PMID: 24297937 DOI: 10.1073/pnas.1315879110] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Radiation damage is a major cause of failure in macromolecular crystallography experiments. Although it is always best to evenly illuminate the entire volume of a homogeneously diffracting crystal, limitations of the available equipment and imperfections in the sample often require a more sophisticated targeting strategy, involving microbeams smaller than the crystal, and translations of the crystal during data collection. This leads to a highly inhomogeneous distribution of absorbed X-rays (i.e., dose). Under these common experimental conditions, the relationship between dose and time is nonlinear, making it difficult to design an experimental strategy that optimizes the radiation damage lifetime of the crystal, or to assign appropriate dose values to an experiment. We present, and experimentally validate, a predictive metric diffraction-weighted dose for modeling the rate of decay of total diffracted intensity from protein crystals in macromolecular crystallography, and hence we can now assign appropriate "dose" values to modern experimental setups. Further, by taking the ratio of total elastic scattering to diffraction-weighted dose, we show that it is possible to directly compare potential data-collection strategies to optimize the diffraction for a given level of damage under specific experimental conditions. As an example of the applicability of this method, we demonstrate that by offsetting the rotation axis from the beam axis by 1.25 times the full-width half maximum of the beam, it is possible to significantly extend the dose lifetime of the crystal, leading to a higher number of diffracted photons, better statistics, and lower overall radiation damage.
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Lovric G, Barré SF, Schittny JC, Roth-Kleiner M, Stampanoni M, Mokso R. Dose optimization approach to fast X-ray microtomography of the lung alveoli. J Appl Crystallogr 2013; 46:856-860. [PMID: 24046488 PMCID: PMC3769076 DOI: 10.1107/s0021889813005591] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Accepted: 02/26/2013] [Indexed: 01/10/2023] Open
Abstract
A basic prerequisite for in vivo X-ray imaging of the lung is the exact determination of radiation dose. Achieving resolutions of the order of micrometres may become particularly challenging owing to increased dose, which in the worst case can be lethal for the imaged animal model. A framework for linking image quality to radiation dose in order to optimize experimental parameters with respect to dose reduction is presented. The approach may find application for current and future in vivo studies to facilitate proper experiment planning and radiation risk assessment on the one hand and exploit imaging capabilities on the other.
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Affiliation(s)
- Goran Lovric
- Swiss Light Source, Paul Scherrer Institute, 5234 Villigen, Switzerland
- Institute for Biomedical Engineering, University and ETH Zurich, 8092 Zurich, Switzerland
| | - Sébastien F. Barré
- Institute of Anatomy, University of Bern, 3012 Bern, Switzerland
- Graduate School for Cellular and Biomedical Sciences, University of Bern, 3012 Bern, Switzerland
| | | | - Matthias Roth-Kleiner
- Clinic of Neonatology, University Hospital of Lausanne (CHUV), 1011 Lausanne, Switzerland
| | - Marco Stampanoni
- Swiss Light Source, Paul Scherrer Institute, 5234 Villigen, Switzerland
- Institute for Biomedical Engineering, University and ETH Zurich, 8092 Zurich, Switzerland
| | - Rajmund Mokso
- Swiss Light Source, Paul Scherrer Institute, 5234 Villigen, Switzerland
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38
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Economou NJ, Zentner IJ, Lazo E, Jakoncic J, Stojanoff V, Weeks SD, Grasty KC, Cocklin S, Loll PJ. Structure of the complex between teicoplanin and a bacterial cell-wall peptide: use of a carrier-protein approach. Acta Crystallogr D Biol Crystallogr 2013; 69:520-33. [PMID: 23519660 DOI: 10.1107/s0907444912050469] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Accepted: 12/11/2012] [Indexed: 11/10/2022]
Abstract
Multidrug-resistant bacterial infections are commonly treated with glycopeptide antibiotics such as teicoplanin. This drug inhibits bacterial cell-wall biosynthesis by binding and sequestering a cell-wall precursor: a D-alanine-containing peptide. A carrier-protein strategy was used to crystallize the complex of teicoplanin and its target peptide by fusing the cell-wall peptide to either MBP or ubiquitin via native chemical ligation and subsequently crystallizing the protein-peptide-antibiotic complex. The 2.05 Å resolution MBP-peptide-teicoplanin structure shows that teicoplanin recognizes its ligand through a combination of five hydrogen bonds and multiple van der Waals interactions. Comparison of this teicoplanin structure with that of unliganded teicoplanin reveals a flexibility in the antibiotic peptide backbone that has significant implications for ligand recognition. Diffraction experiments revealed an X-ray-induced dechlorination of the sixth amino acid of the antibiotic; it is shown that teicoplanin is significantly more radiation-sensitive than other similar antibiotics and that ligand binding increases radiosensitivity. Insights derived from this new teicoplanin structure may contribute to the development of next-generation antibacterials designed to overcome bacterial resistance.
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Affiliation(s)
- Nicoleta J Economou
- Department of Biochemistry and Molecular Biology, Drexel University College of Medicine, Philadelphia, PA 19102, USA
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Allan EG, Kander MC, Carmichael I, Garman EF. To scavenge or not to scavenge, that is STILL the question. J Synchrotron Radiat 2013; 20:23-36. [PMID: 23254653 PMCID: PMC3526919 DOI: 10.1107/s0909049512046237] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2012] [Accepted: 11/08/2012] [Indexed: 05/23/2023]
Abstract
An extensive radiation chemistry literature would suggest that the addition of certain radical scavengers might mitigate the effects of radiation damage during protein crystallography diffraction data collection. However, attempts to demonstrate and quantify such an amelioration and its dose dependence have not yielded consistent results, either at room temperature (RT) or 100 K. Here the information thus far available is summarized and reasons for this lack of quantitative success are identified. Firstly, several different metrics have been used to monitor and quantify the rate of damage, and, as shown here, these can give results which are in conflict regarding scavenger efficacy. In addition, significant variation in results from data collected from crystals treated in nominally the same way has been observed. Secondly, typical crystallization conditions contain substantial concentrations of chemical species which already interact strongly with some of the X-ray-induced radicals that the added scavengers are intended to intercept. These interactions are probed here by the complementary technique of on-line microspectrophotometry carried out on solutions and crystals held both at 100 K and RT, the latter enabled by the use of a beamline-mounted humidifying device. With the help of computational chemistry, attempts are made to assign some of the characteristic spectral features observed experimentally. A further source of uncertainty undoubtedly lies in the challenge of reliably measuring the parameters necessary for the accurate calculation of the absorbed dose (e.g. crystal size and shape, beam profile) and its distribution within the volume of the crystal (an issue addressed in detail in another article in this issue). While microspectrophotometry reveals that the production of various species can be quenched by the addition of scavengers, it is less clear that this observation can be translated into a significant gain in crystal dose tolerance for macromolecular crystallographers.
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Affiliation(s)
- Elizabeth G. Allan
- Laboratory of Molecular Biophysics, Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
| | - Melissa C. Kander
- Notre Dame Radiation Laboratory, and Department of Chemistry and Biochemistry, University of Notre Dame, IN 46556, USA
| | - Ian Carmichael
- Notre Dame Radiation Laboratory, and Department of Chemistry and Biochemistry, University of Notre Dame, IN 46556, USA
| | - Elspeth F. Garman
- Laboratory of Molecular Biophysics, Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
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40
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Alessi DS, Uster B, Borca CN, Grolimund D, Bernier-Latmani R. Beam-induced oxidation of monomeric U(IV) species. J Synchrotron Radiat 2013; 20:197-199. [PMID: 23254675 DOI: 10.1107/s0909049512041763] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2012] [Accepted: 10/05/2012] [Indexed: 06/01/2023]
Abstract
Uranium L(III)-edge X-ray absorption spectroscopy is often used to probe the oxidation state and coordination of uranium in environmental samples, and micrometre-sized beams can be used to spatially map the distribution of uranium relative to other elements. Here a variety of uranium-containing environmental samples are analyzed at both microbeam and larger beam sizes to determine whether reoxidation of U(IV) occurred. Monomeric U(IV), a recently discovered product of U(VI) reduction by microbes and certain iron-bearing minerals at uranium-contaminated field sites, was found to be reoxidized during microbeam (3 µm × 2 µm) analysis of biomass and sediments containing the species but not at larger beam sizes. Thus, care must be taken when using X-ray microprobes to analyze samples containing monomeric U(IV).
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Affiliation(s)
- Daniel S Alessi
- Environmental Microbiology Laboratory, Ecole Polytechnique, Fédérale de Lausanne, Switzerland.
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41
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Holton JM, Nielsen C, Frankel KA. The point-spread function of fiber-coupled area detectors. J Synchrotron Radiat 2012; 19:1006-1011. [PMID: 23093762 PMCID: PMC3480276 DOI: 10.1107/s0909049512035571] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2012] [Accepted: 08/13/2012] [Indexed: 05/31/2023]
Abstract
The point-spread function (PSF) of a fiber-optic taper-coupled CCD area detector was measured over five decades of intensity using a 20 µm X-ray beam and ~2000-fold averaging. The `tails' of the PSF clearly revealed that it is neither Gaussian nor Lorentzian, but instead resembles the solid angle subtended by a pixel at a point source of light held a small distance (~27 µm) above the pixel plane. This converges to an inverse cube law far from the beam impact point. Further analysis revealed that the tails are dominated by the fiber-optic taper, with negligible contribution from the phosphor, suggesting that the PSF of all fiber-coupled CCD-type detectors is best described as a Moffat function.
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Affiliation(s)
- James M Holton
- Department of Biochemistry and Biophysics, University of California, San Francisco, CA 94158-2330, USA.
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42
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De la Mora E, Lovett JE, Blanford CF, Garman EF, Valderrama B, Rudino-Pinera E. Structural changes caused by radiation-induced reduction and radiolysis: the effect of X-ray absorbed dose in a fungal multicopper oxidase. Acta Crystallogr D Biol Crystallogr 2012; 68:564-77. [PMID: 22525754 DOI: 10.1107/s0907444912005343] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Accepted: 02/07/2012] [Indexed: 02/20/2023]
Abstract
X-ray radiation induces two main effects at metal centres contained in protein crystals: radiation-induced reduction and radiolysis and a resulting decrease in metal occupancy. In blue multicopper oxidases (BMCOs), the geometry of the active centres and the metal-to-ligand distances change depending on the oxidation states of the Cu atoms, suggesting that these alterations are catalytically relevant to the binding, activation and reduction of O(2). In this work, the X-ray-determined three-dimensional structure of laccase from the basidiomycete Coriolopsis gallica (Cg L), a high catalytic potential BMCO, is described. By combining spectroscopic techniques (UV-Vis, EPR and XAS) and X-ray crystallography, structural changes at and around the active copper centres were related to pH and absorbed X-ray dose (energy deposited per unit mass). Depletion of two of the four active Cu atoms as well as low occupancies of the remaining Cu atoms, together with different conformations of the metal centres, were observed at both acidic pH and high absorbed dose, correlating with more reduced states of the active coppers. These observations provide additional evidence to support the role of flexibility of copper sites during O(2) reduction. This study supports previous observations indicating that interpretations regarding redox state and metal coordination need to take radiation effects explicitly into account.
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Affiliation(s)
- Eugenio De la Mora
- Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Avenida Universidad 2001, Cuernavaca, Morelos 62210, Mexico
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43
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Nielsen SS, Møller M, Gillilan RE. High-throughput biological small-angle X-ray scattering with a robotically loaded capillary cell. J Appl Crystallogr 2012; 45:213-223. [PMID: 22509071 PMCID: PMC3325496 DOI: 10.1107/s0021889812000957] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2011] [Accepted: 01/09/2012] [Indexed: 11/10/2022] Open
Abstract
With the rise in popularity of biological small-angle X-ray scattering (BioSAXS) measurements, synchrotron beamlines are confronted with an ever-increasing number of samples from a wide range of solution conditions. To meet these demands, an increasing number of beamlines worldwide have begun to provide automated liquid-handling systems for sample loading. This article presents an automated sample-loading system for BioSAXS beamlines, which combines single-channel disposable-tip pipetting with a vacuum-enclosed temperature-controlled capillary flow cell. The design incorporates an easily changeable capillary to reduce the incidence of X-ray window fouling and cross contamination. Both the robot-control and the data-processing systems are written in Python. The data-processing code, RAW, has been enhanced with several new features to form a user-friendly BioSAXS pipeline for the robot. The flow cell also supports efficient manual loading and sample recovery. An effective rinse protocol for the sample cell is developed and tested. Fluid dynamics within the sample capillary reveals a vortex ring pattern of circulation that redistributes radiation-damaged material. Radiation damage is most severe in the boundary layer near the capillary surface. At typical flow speeds, capillaries below 2 mm in diameter are beginning to enter the Stokes (creeping flow) regime in which mixing due to oscillation is limited. Analysis within this regime shows that single-pass exposure and multiple-pass exposure of a sample plug are functionally the same with regard to exposed volume when plug motion reversal is slow. The robot was tested on three different beamlines at the Cornell High-Energy Synchrotron Source, with a variety of detectors and beam characteristics, and it has been used successfully in several published studies as well as in two introductory short courses on basic BioSAXS methods.
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Affiliation(s)
- S. S. Nielsen
- MacCHESS (Macromolecular Diffraction Facility at CHESS), Cornell University, Ithaca, NY 14853, USA
| | - M. Møller
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - R. E. Gillilan
- MacCHESS (Macromolecular Diffraction Facility at CHESS), Cornell University, Ithaca, NY 14853, USA
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44
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Huotari S, Pylkkänen T, Soininen JA, Kas JJ, Hämäläinen K, Monaco G. X-ray-Raman-scattering-based EXAFS beyond the dipole limit. J Synchrotron Radiat 2012; 19:106-113. [PMID: 22186651 DOI: 10.1107/s0909049511039422] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2011] [Accepted: 09/26/2011] [Indexed: 05/31/2023]
Abstract
X-ray Raman scattering (XRS) provides a bulk-sensitive method of measuring the extended X-ray absorption fine structure (EXAFS) of soft X-ray absorption edges. Accurate measurements and data analysis procedures for the determination of XRS-EXAFS of polycrystalline diamond are described. The contributions of various angular-momentum components beyond the dipole limit to the atomic background and the EXAFS oscillations are incorporated using self-consistent real-space multiple-scattering calculations. The properly extracted XRS-EXAFS oscillations are in good agreement with calculations and earlier soft X-ray EXAFS results. It is shown, however, that under certain conditions multiple-scattering contributions to XRS-EXAFS deviate from those in standard EXAFS, leading to noticeable changes in the real-space signal at higher momentum transfers owing to non-dipole contributions. These results pave the way for the accurate application of XRS-EXAFS to previously inaccessible light-element systems.
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Affiliation(s)
- Simo Huotari
- Department of Physics, University of Helsinki, Helsinki, Finland.
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Abstract
In order to accurately measure the photon flux and to assist in aligning the beam, we have designed a modified beam stop device based on a photo diode integrated with the beam stop. The beam stop contains a small CdWO(4) crystal that completely stops the X-rays and at the same time produces photoluminescence proportional to the X-ray flux. The light is then guided to a photosensitive diode, using a flexible light pipe, to monitor the flux. With this device we achieve the goal of stopping the primary X-ray beam and simultaneously monitoring the X-ray intensity, thus eliminating the need for integrating ion-chambers into the capillary or collimator mount.
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Affiliation(s)
- Ulrich Englich
- Cornell University, Macromolecular Diffraction at CHESS (MacCHESS), Cornell High Energy Synchrotron Source, Ithaca, NY 14853
| | - Peter Revesz
- Cornell University, Cornell High Energy Synchrotron Source, Ithaca, NY 14853
| | - William Miller
- Cornell University, Macromolecular Diffraction at CHESS (MacCHESS), Cornell High Energy Synchrotron Source, Ithaca, NY 14853
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46
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De la Mora E, Carmichael I, Garman EF. Effective scavenging at cryotemperatures: further increasing the dose tolerance of protein crystals. J Synchrotron Radiat 2011; 18:346-57. [PMID: 21525642 DOI: 10.1107/s0909049511007163] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2011] [Accepted: 02/24/2011] [Indexed: 05/21/2023]
Abstract
The rate of radiation damage to macromolecular crystals at both room temperature and 100 K has previously been shown to be reduced by the use of certain radical scavengers. Here the effects of sodium nitrate, an electron scavenger, are investigated at 100 K. For sodium nitrate at a concentration of 0.5 M in chicken egg-white lysozyme crystals, the dose tolerance is increased by a factor of two as judged from the global damage parameters, and no specific structural damage to the disulfide bonds is seen until the dose is greatly in excess (more than a factor of five) of the value at which damage appears in electron density maps derived from a scavenger-free crystal. In the electron density maps, ordered nitrate ions adjacent to the disulfide bonds are seen to lose an O atom, and appear to protect the disulfide bonds. In addition, results reinforcing previous reports on the effectiveness of ascorbate are presented. The mechanisms of action of both scavengers in the crystalline environment are elucidated.
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Affiliation(s)
- Eugenio De la Mora
- Laboratory of Molecular Biophysics, Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
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47
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Rajendran C, Dworkowski FSN, Wang M, Schulze-Briese C. Radiation damage in room-temperature data acquisition with the PILATUS 6M pixel detector. J Synchrotron Radiat 2011; 18:318-28. [PMID: 21525639 PMCID: PMC3133521 DOI: 10.1107/s090904951100968x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2010] [Accepted: 03/14/2011] [Indexed: 05/20/2023]
Abstract
The first study of room-temperature macromolecular crystallography data acquisition with a silicon pixel detector is presented, where the data are collected in continuous sample rotation mode, with millisecond read-out time and no read-out noise. Several successive datasets were collected sequentially from single test crystals of thaumatin and insulin. The dose rate ranged between ∼ 1320 Gy s(-1) and ∼ 8420 Gy s(-1) with corresponding frame rates between 1.565 Hz and 12.5 Hz. The data were analysed for global radiation damage. A previously unreported negative dose-rate effect is observed in the indicators of global radiation damage, which showed an approximately 75% decrease in D(1/2) at sixfold higher dose rate. The integrated intensity decreases in an exponential manner. Sample heating that could give rise to the enhanced radiation sensitivity at higher dose rate is investigated by collecting data between crystal temperatures of 298 K and 353 K. UV-Vis spectroscopy is used to demonstrate that disulfide radicals and trapped electrons do not accumulate at high dose rates in continuous data collection.
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Affiliation(s)
- Chitra Rajendran
- Swiss Light Source at Paul Scherrer Institute, CH-5232 Villigen, Switzerland.
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48
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Garman EF, Weik M. Macromolecular crystallography radiation damage research: what's new? J Synchrotron Radiat 2011; 18:313-7. [PMID: 21525638 PMCID: PMC3083910 DOI: 10.1107/s0909049511013859] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2011] [Accepted: 04/12/2011] [Indexed: 05/05/2023]
Abstract
Radiation damage in macromolecular crystallography has become a mainstream concern over the last ten years. The current status of research into this area is briefly assessed, and the ten new papers published in this issue are set into the context of previous work in the field. Some novel and exciting developments emerging over the last two years are also summarized.
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Affiliation(s)
- Elspeth F. Garman
- Laboratory of Molecular Biophysics, Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
| | - Martin Weik
- Comissariat à l’Energie Atomique, Institut de Biologie Structurale, F-38054 Grenoble, France
- CNRS, UMR5075, F-38027 Grenoble, France
- Université Joseph Fourier, F-38000 Grenoble, France
- ESRF, 6 rue Jules Horowitz, BP 220, 38043 Grenoble Cedex, France
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49
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Homer C, Cooper L, Gonzalez A. Energy dependence of site-specific radiation damage in protein crystals. J Synchrotron Radiat 2011; 18:338-45. [PMID: 21525641 PMCID: PMC3083911 DOI: 10.1107/s0909049511005504] [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] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2010] [Accepted: 02/14/2011] [Indexed: 05/21/2023]
Abstract
It is important to consider radiation damage to crystals caused by data collection when solving structures and critical when determining protein function, which can often depend on very subtle structural characteristics. In this study the rate of damage to specific sites in protein crystals cooled at 100 K is found to depend on the energy of the incident X-ray beam. Several lysozyme crystals were each subjected to 3-26 MGy of cumulative X-ray exposure by collecting multiple data sets from each crystal at either 9 keV or 14 keV. The integrated electron density surrounding each S atom in the structure was calculated for each data set and the change in electron density was evaluated as a function of dose at the two energies. The rate of electron density decrease per cubic Å per MGy was determined to be greater at 14 keV than at 9 keV for cysteine sulfurs involved in disulphide bridges; no statistically significant differences in the decay rates were found for methionine sulfurs. These preliminary results imply that it might be possible to minimize certain types of specific radiation damage by an appropriate choice of energy. Further experiments studying a variety of photolabile sites over a wider range of energies are needed to confirm this conclusion.
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Affiliation(s)
| | - Laura Cooper
- SSRL, 2575 Sand Hill Road, Menlo Park, CA 94025, USA
| | - Ana Gonzalez
- SSRL, 2575 Sand Hill Road, Menlo Park, CA 94025, USA
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Abstract
Heterogeneous catalysis is a term normally used to describe a group of catalytic processes, yet it could equally be employed to describe the catalytic solid itself. A better understanding of the chemical and structural variation within such materials is thus a pre-requisite for the rationalising of structure-function relationships and ultimately to the design of new, more sustainable catalytic processes. The past 20 years has witnessed marked improvements in technologies required for analytical measurements at synchrotron sources, including higher photon brightness, nano-focusing, rapid, high resolution data acquisition and in the handling of large volumes of data. It is now possible to image materials using the entire synchrotron radiative profile, thus heralding a new era of in situ/operando measurements of catalytic solids. In this tutorial review we discuss the recent work in this exciting new research area and finally conclude with a future outlook on what will be possible/challenging to measure in the not-too-distant future.
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Affiliation(s)
- Andrew M Beale
- Inorganic Chemistry and Catalysis, Debye Institute for NanoMaterials Science, Sorbonnelaan 16, 3584 CA, Utrecht, The Netherlands.
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