Search Results

You searched for all publications:

with publication states 'Published (Approved)'

Search Again...

These results only include publications that have been reviewed and processed by Diamond Light Source. To also view papers that have not yet been processed click here.

You can use the folder icon under Actions to collate papers as required. You can then click on View Folder in the left-hand navigation to review and/or download your folder.

Exact matches
Related results

8 items found (0 items not approved), displaying all items.1

Instruments / Technical Area	Publication Details	Published
	Optical control of ultrafast structural dynamics in a fluorescent protein Christopher D. M. Hutchison , James Baxter , Ann Fitzpatrick , Gabriel Dorlhiac , Alisia Fadini , Samuel Perrett , Karim Maghlaoui , Salomé Bodet Lefèvre , Violeta Cordon-Preciado , Josie L. Ferreira , Volha U. Chukhutsina , Douglas Garratt , Jonathan Barnard , Gediminas Galinis , Flo Glencross , Rhodri M. Morgan , Sian Stockton , Ben Taylor , Letong Yuan , Matthew G. Romei , Chi-Yun Lin , Jon P. Marangos , Marius Schmidt , Viktoria Chatrchyan , Tiago Buckup , Dmitry Morozov , Jaehyun Park , Sehan Park , Intae Eom , Minseok Kim , Dogeun Jang , Hyeongi Choi , Hyojung Hyun , Gisu Park , Eriko Nango , Rie Tanaka , Shigeki Owada , Kensuke Tono , Daniel P. Deponte , Sergio Carbajo , Matt Seaberg , Andrew Aquila , Sebastien Boutet , Anton Barty , So Iwata , Steven G. Boxer , Gerrit Groenhof , Jasper J. Van Thor Nature Chemistry 4 DOI: 10.1038/s41557-023-01275-1 Open Access Show Abstract ▼ Abstract: The photoisomerization reaction of a fluorescent protein chromophore occurs on the ultrafast timescale. The structural dynamics that result from femtosecond optical excitation have contributions from vibrational and electronic processes and from reaction dynamics that involve the crossing through a conical intersection. The creation and progression of the ultrafast structural dynamics strongly depends on optical and molecular parameters. When using X-ray crystallography as a probe of ultrafast dynamics, the origin of the observed nuclear motions is not known. Now, high-resolution pump–probe X-ray crystallography reveals complex sub-ångström, ultrafast motions and hydrogen-bonding rearrangements in the active site of a fluorescent protein. However, we demonstrate that the measured motions are not part of the photoisomerization reaction but instead arise from impulsively driven coherent vibrational processes in the electronic ground state. A coherent-control experiment using a two-colour and two-pulse optical excitation strongly amplifies the X-ray crystallographic difference density, while it fully depletes the photoisomerization process. A coherent control mechanism was tested and confirmed the wave packets assignment.	Aug 2023
	Structures of the intermediates of Kok’s photosynthetic water oxidation clock Jan Kern , Ruchira Chatterjee , Iris D. Young , Franklin D. Fuller , Louise Lassalle , Mohamed Ibrahim , Sheraz Gul , Thomas Fransson , Aaron S. Brewster , Roberto Alonso-Mori , Rana Hussein , Miao Zhang , Lacey Douthit , Casper De Lichtenberg , Mun Hon Cheah , Dmitry Shevela , Julia Wersig , Ina Seuffert , Dimosthenis Sokaras , Ernest Pastor , Clemens Weninger , Thomas Kroll , Raymond G. Sierra , Pierre Aller , Agata Butryn , Allen M. Orville , Mengning Liang , Alexander Batyuk , Jason E. Koglin , Sergio Carbajo , Sébastien Boutet , Nigel W. Moriarty , James M. Holton , Holger Dobbek , Paul D. Adams , Uwe Bergmann , Nicholas K. Sauter , Athina Zouni , Johannes Messinger , Junko Yano , Vittal K. Yachandra Nature 11 DOI: 10.1038/s41586-018-0681-2 Show Abstract ▼ Abstract: Inspired by the period-four oscillation in flash-induced oxygen evolution of photosystem II discovered by Joliot in 1969, Kok performed additional experiments and proposed a five-state kinetic model for photosynthetic oxygen evolution, known as Kok’s S-state clock or cycle1,2. The model comprises four (meta)stable intermediates (S0, S1, S2 and S3) and one transient S4 state, which precedes dioxygen formation occurring in a concerted reaction from two water-derived oxygens bound at an oxo-bridged tetra manganese calcium (Mn4CaO5) cluster in the oxygen-evolving complex3,4,5,6,7. This reaction is coupled to the two-step reduction and protonation of the mobile plastoquinone QB at the acceptor side of PSII. Here, using serial femtosecond X-ray crystallography and simultaneous X-ray emission spectroscopy with multi-flash visible laser excitation at room temperature, we visualize all (meta)stable states of Kok’s cycle as high-resolution structures (2.04–2.08 Å). In addition, we report structures of two transient states at 150 and 400 µs, revealing notable structural changes including the binding of one additional ‘water’, Ox, during the S2→S3 state transition. Our results suggest that one water ligand to calcium (W3) is directly involved in substrate delivery. The binding of the additional oxygen Ox in the S3 state between Ca and Mn1 supports O–O bond formation mechanisms involving O5 as one substrate, where Ox is either the other substrate oxygen or is perfectly positioned to refill the O5 position during O2 release. Thus, our results exclude peroxo-bond formation in the S3 state, and the nucleophilic attack of W3 onto W2 is unlikely.	Nov 2018
	Femtosecond X-ray coherent diffraction of aligned amyloid fibrils on low background graphene Carolin Seuring , Kartik Ayyer , Eleftheria Filippaki , Miriam Barthelmess , Jean-Nicolas Longchamp , Philippe Ringler , Tommaso Pardini , David H. Wojtas , Matthew A. Coleman , Katerina Dörner , Silje Fuglerud , Greger Hammarin , Birgit Habenstein , Annette E. Langkilde , Antoine Loquet , Alke Meents , Roland Riek , Henning Stahlberg , Sébastien Boutet , Mark S. Hunter , Jason Koglin , Mengning Liang , Helen M. Ginn , Rick P. Millane , Matthias Frank , Anton Barty , Henry N. Chapman Nature Communications 9 DOI: 10.1038/s41467-018-04116-9 Open Access Show Abstract ▼ Abstract: Here we present a new approach to diffraction imaging of amyloid fibrils, combining a free-standing graphene support and single nanofocused X-ray pulses of femtosecond duration from an X-ray free-electron laser. Due to the very low background scattering from the graphene support and mutual alignment of filaments, diffraction from tobacco mosaic virus (TMV) filaments and amyloid protofibrils is obtained to 2.7 Å and 2.4 Å resolution in single diffraction patterns, respectively. Some TMV diffraction patterns exhibit asymmetry that indicates the presence of a limited number of axial rotations in the XFEL focus. Signal-to-noise levels from individual diffraction patterns are enhanced using computational alignment and merging, giving patterns that are superior to those obtainable from synchrotron radiation sources. We anticipate that our approach will be a starting point for further investigations into unsolved structures of filaments and other weakly scattering objects.	May 2018
B22-Multimode InfraRed imaging And Microspectroscopy I03-Macromolecular Crystallography I04-Macromolecular Crystallography	X-ray free electron laser determination of crystal structures of dark and light states of a reversibly photoswitching fluorescent protein at room temperature Christopher D. M. Hutchison , Violeta Cordon-Preciado , Rhodri M. L. Morgan , Takanori Nakane , Josie Ferreira , Gabriel Dorlhiac , Alvaro Sanchez-Gonzalez , Allan S. Johnson , Ann Fitzpatrick , Clyde Fare , Jon Marangos , Chun Hong Yoon , Mark S. Hunter , Daniel P. Deponte , Sébastien Boutet , Shigeki Owada , Rie Tanaka , Kensuke Tono , So Iwata , Jasper J. Van Thor International Journal Of Molecular Sciences 18 DOI: 10.3390/ijms18091918 Diamond Proposal Number(s): [12579] Open Access Show Abstract ▼ Abstract: The photochromic fluorescent protein Skylan-NS (Nonlinear Structured illumination variant mEos3.1H62L) is a reversibly photoswitchable fluorescent protein which has an unilluminated/ground state with an anionic and cis chromophore conformation and high fluorescence quantum yield. Photo-conversion with illumination at 515 nm generates a meta-stable intermediate with neutral trans-chromophore structure that has a 4 h lifetime. We present X-ray crystal structures of the cis (on) state at 1.9 Angstrom resolution and the trans (off) state at a limiting resolution of 1.55 Angstrom from serial femtosecond crystallography experiments conducted at SPring-8 Angstrom Compact Free Electron Laser (SACLA) at 7.0 keV and 10.5 keV, and at Linac Coherent Light Source (LCLS) at 9.5 keV. We present a comparison of the data reduction and structure determination statistics for the two facilities which differ in flux, beam characteristics and detector technologies. Furthermore, a comparison of droplet on demand, grease injection and Gas Dynamic Virtual Nozzle (GDVN) injection shows no significant differences in limiting resolution. The photoconversion of the on- to the off-state includes both internal and surface exposed protein structural changes, occurring in regions that lack crystal contacts in the orthorhombic crystal form.	Sep 2017
	Structure of photosystem II and substrate binding at room temperature Iris D. Young , Mohamed Ibrahim , Ruchira Chatterjee , Sheraz Gul , Franklin D. Fuller , Sergey Koroidov , Aaron S. Brewster , Rosalie Tran , Roberto Alonso-Mori , Thomas Kroll , Tara Michels-Clark , Hartawan Laksmono , Raymond G. Sierra , Claudiu A. Stan , Rana Hussein , Miao Zhang , Lacey Douthit , Markus Kubin , Casper De Lichtenberg , Long Vo Pham , Håkan Nilsson , Mun Hon Cheah , Dmitriy Shevela , Claudio Saracini , Mackenzie A. Bean , Ina Seuffert , Dimosthenis Sokaras , Tsu-Chien Weng , Ernest Pastor , Clemens Weninger , Thomas Fransson , Louise Lassalle , Philipp Bräuer , Pierre Aller , Peter T. Docker , Babak Andi , Allen M. Orville , James M. Glownia , Silke Nelson , Marcin Sikorski , Diling Zhu , Mark S. Hunter , Thomas J. Lane , Andy Aquila , Jason E. Koglin , Joseph Robinson , Mengning Liang , Sébastien Boutet , Artem Y. Lyubimov , Monarin Uervirojnangkoorn , Nigel W. Moriarty , Dorothee Liebschner , Pavel V. Afonine , David G. Waterman , Gwyndaf Evans , Philippe Wernet , Holger Dobbek , William I. Weis , Axel T. Brunger , Petrus H. Zwart , Paul D. Adams , Athina Zouni , Johannes Messinger , Uwe Bergmann , Nicholas K. Sauter , Jan Kern , Vittal K. Yachandra , Junko Yano Nature DOI: 10.1038/nature20161 Show Abstract ▼ Abstract: Light-induced oxidation of water by photosystem II (PS II) in plants, algae and cyanobacteria has generated most of the dioxygen in the atmosphere. PS II, a membrane-bound multi-subunit pigment protein complex, couples the one-electron photochemistry at the reaction centre with the four-electron redox chemistry of water oxidation at the Mn4CaO5 cluster in the oxygen-evolving complex (OEC). Under illumination, the OEC cycles through five intermediate S-states (S0 to S4)1, in which S1 is the dark-stable state and S3 is the last semi-stable state before O–O bond formation and O2 evolution2, 3. A detailed understanding of the O–O bond formation mechanism remains a challenge, and will require elucidation of both the structures of the OEC in the different S-states and the binding of the two substrate waters to the catalytic site4, 5, 6. Here we report the use of femtosecond pulses from an X-ray free electron laser (XFEL) to obtain damage-free, room temperature structures of dark-adapted (S1), two-flash illuminated (2F; S3-enriched), and ammonia-bound two-flash illuminated (2F-NH3; S3-enriched) PS II. Although the recent 1.95 Å resolution structure of PS II at cryogenic temperature using an XFEL7 provided a damage-free view of the S1 state, measurements at room temperature are required to study the structural landscape of proteins under functional conditions8, 9, and also for in situ advancement of the S-states. To investigate the water-binding site(s), ammonia, a water analogue, has been used as a marker, as it binds to the Mn4CaO5 cluster in the S2 and S3 states10. Since the ammonia-bound OEC is active, the ammonia-binding Mn site is not a substrate water site10, 11, 12, 13. This approach, together with a comparison of the native dark and 2F states, is used to discriminate between proposed O–O bond formation mechanisms.	Nov 2016
I24-Microfocus Macromolecular Crystallography	Ternary structure reveals mechanism of a membrane diacylglycerol kinase Dianfan Li , Phillip J. Stansfeld , Mark S. P. Sansom , Aaron Keogh , Lutz Vogeley , Nicole Howe , Joseph Lyons , David Aragao , Petra Fromme , Raimund Fromme , Shibom Basu , Ingo Grotjohann , Christopher Kupitz , Kimberley Rendek , Uwe Weierstall , Nadia A. Zatsepin , Vadim Cherezov , Wei Liu , Sateesh Bandaru , Niall J. English , Cornelius Gati , Anton Barty , Oleksandr Yefanov , Henry N. Chapman , Kay Diederichs , Marc Messerschmidt , Sébastien Boutet , Garth J. Williams , M. Marvin Seibert , Martin Caffrey Nature Communications 6 DOI: 10.1038/ncomms10140 Open Access Show Abstract ▼ Abstract: Diacylglycerol kinase catalyses the ATP-dependent conversion of diacylglycerol to phosphatidic acid in the plasma membrane of Escherichia coli. The small size of this integral membrane trimer, which has 121 residues per subunit, means that available protein must be used economically to craft three catalytic and substrate-binding sites centred about the membrane/cytosol interface. How nature has accomplished this extraordinary feat is revealed here in a crystal structure of the kinase captured as a ternary complex with bound lipid substrate and an ATP analogue. Residues, identified as essential for activity by mutagenesis, decorate the active site and are rationalized by the ternary structure. The γ-phosphate of the ATP analogue is positioned for direct transfer to the primary hydroxyl of the lipid whose acyl chain is in the membrane. A catalytic mechanism for this unique enzyme is proposed. The active site architecture shows clear evidence of having arisen by convergent evolution.	Dec 2015
	Trace phase detection and strain characterization from serial X-ray free-electron laser crystallography of a Pr0.5Ca0.5MnO3 powder Kenneth R. Beyerlein , Christian Jooss , Anton Barty , Richard Bean , Sébastien Boutet , Sarnjeet Dhesi , R. Bruce Doak , Michael Först , Lorenzo Galli , Richard A. Kirian , Joseph Kozak , Michael Lang , Roman Mankowsky , Marc Messerschmidt , John C. H. Spence , Dingjie Wang , Uwe Weierstall , Thomas A. White , Garth J. Williams , Oleksandr Yefanov Powder Diffraction 30 DOI: 10.1017/S0885715614001171 Show Abstract ▼ Abstract: We report on the analysis of virtual powder-diffraction patterns from serial femtosecond crystallography (SFX) data collected at an X-ray free-electron laser. Different approaches to binning and normalizing these patterns are discussed with respect to the microstructural characteristics which each highlights. Analysis of SFX data from a powder of Pr0.5Ca0.5MnO3 in this way finds evidence of other trace phases in its microstructure which was not detectable in a standard powder-diffraction measurement. Furthermore, a comparison between two virtual powder pattern integration strategies is shown to yield different diffraction peak broadening, indicating sensitivity to different types of microstrain. This paper is a first step in developing new data analysis methods for microstructure characterization from serial crystallography data.	Nov 2014
	Ultrafast single-shot diffraction imaging of nanoscale dynamics Anton Barty , Sébastien Boutet , Michael J. Bogan , Stefan Hau-Riege , Stefano Marchesini , Klaus Sokolowski-Tinten , Nikola Stojanovic , Raanan Tobey , Henri Ehrke , Andrea Cavalleri , Stefan Düsterer , Matthias Frank , Sasa Bajt , Bruce W. Woods , M. Marvin Seibert , Janos Hajdu , Rolf Treusch , Henry N. Chapman Nature Photonics 2 (7), 415-419 DOI: 10.1038/nphoton.2008.128 Show Abstract ▼ Abstract: The transient nanoscale dynamics of materials on femtosecond to picosecond timescales is of great interest in the study of condensed phase dynamics such as crack formation, phase separation and nucleation, and rapid fluctuations in the liquid state or in biologically relevant environments. The ability to take images in a single shot is the key to studying non-repetitive behaviour mechanisms, a capability that is of great importance in many of these problems. Using coherent diffraction imaging with femtosecond X-ray free-electron-laser pulses we capture time-series snapshots of a solid as it evolves on the ultrafast timescale. Artificial structures imprinted on a Si3N4 window are excited with an optical laser and undergo laser ablation, which is imaged with a spatial resolution of 50 nm and a temporal resolution of 10 ps. By using the shortest available free-electron-laser wavelengths1 and proven synchronization methods2 this technique could be extended to spatial resolutions of a few nanometres and temporal resolutions of a few tens of femtoseconds. This experiment opens the door to a new regime of time-resolved experiments in mesoscopic dynamics.	Jun 2008

Publications Database

Search Results

You searched for all publications:

Search Again...

Subject Areas (check all that apply) select all

Instruments used to collect data (check all that apply) select all

Collaborations involved (check all that apply) select all

Diamond Offline Facilities used

Relevant Technical Areas (check all that apply) select all

Menu for Anonymous User