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38 items found (0 items not approved), displaying 21 to 30.[First/Prev] 1, 2, 3, 4 [Next/Last]

Instruments / Technical Area	Publication Details	Published
	Segmented flow generator for serial crystallography at the European X-ray free electron laser Austin Echelmeier , Jorvani Cruz Villarreal , Marc Messerschmidt , Daihyun Kim , Jesse D. Coe , Darren Thifault , Sabine Botha , Ana Egatz-Gomez , Sahir Gandhi , Gerrit Brehm , Chelsie E. Conrad , Debra T. Hansen , Caleb Madsen , Saša Bajt , J. Domingo Meza-Aguilar , Dominik Oberthuer , Max O. Wiedorn , Holger Fleckenstein , Derek Mendez , Juraj Knoška , Jose M. Martin-Garcia , Hao Hu , Stella Lisova , Aschkai Allahgoli , Yaroslav Gevorkov , Kartik Ayyer , Steve Aplin , Helen M. Ginn , Heinz Graafsma , Andrew J. Morgan , Dominic Greiffenberg , Alexander Klujev , Torsten Laurus , Jennifer Poehlsen , Ulrich Trunk , Davide Mezza , Bernd Schmitt , Manuela Kuhn , Raimund Fromme , Jolanta Sztuk-Dambietz , Natascha Raab , Steffen Hauf , Alessandro Silenzi , Thomas Michelat , Chen Xu , Cyril Danilevski , Andrea Parenti , Leonce Mekinda , Britta Weinhausen , Grant Mills , Patrik Vagovic , Yoonhee Kim , Henry Kirkwood , Richard Bean , Johan Bielecki , Stephan Stern , Klaus Giewekemeyer , Adam Round , Joachim Schulz , Katerina Dörner , Thomas D. Grant , Valerio Mariani , Anton Barty , Adrian P. Mancuso , Uwe Weierstall , John C. H. Spence , Henry N. Chapman , Nadia Zatsepin , Petra Fromme , Richard A. Kirian , Alexandra Ros Nature Communications 11 DOI: 10.1038/s41467-020-18156-7 Open Access Show Abstract ▼ Abstract: Serial femtosecond crystallography (SFX) with X-ray free electron lasers (XFELs) allows structure determination of membrane proteins and time-resolved crystallography. Common liquid sample delivery continuously jets the protein crystal suspension into the path of the XFEL, wasting a vast amount of sample due to the pulsed nature of all current XFEL sources. The European XFEL (EuXFEL) delivers femtosecond (fs) X-ray pulses in trains spaced 100 ms apart whereas pulses within trains are currently separated by 889 ns. Therefore, continuous sample delivery via fast jets wastes >99% of sample. Here, we introduce a microfluidic device delivering crystal laden droplets segmented with an immiscible oil reducing sample waste and demonstrate droplet injection at the EuXFEL compatible with high pressure liquid delivery of an SFX experiment. While achieving ~60% reduction in sample waste, we determine the structure of the enzyme 3-deoxy-D-manno-octulosonate-8-phosphate synthase from microcrystals delivered in droplets revealing distinct structural features not previously reported.	Sep 2020
I03-Macromolecular Crystallography Krios I-Titan Krios I at Diamond	Neutralisation of SARS-CoV-2 by destruction of the prefusion Spike Jiandong Huo , Yuguang Zhao , Jingshan Ren , Daming Zhou , Helen M. E. Duyvesteyn , Helen M. Ginn , Loic Carrique , Tomas Malinauskas , Reinis R. Ruza , Pranav N. M. Shah , Tiong Kit Tan , Pramila Rijal , Naomi Coombes , Kevin R. Bewley , Julia A. Tree , Julika Radecke , Neil Paterson , Piyasa Supasa , Juthathip Mongkolsapaya , Gavin R. Screaton , Miles Carroll , Alain Townsend , Elizabeth E. Fry , Raymond J. Owens , David I. Stuart Cell Host & Microbe DOI: 10.1016/j.chom.2020.06.010 Diamond Proposal Number(s): [19946, 26983] Open Access Show Abstract ▼ Abstract: There are as yet no licenced therapeutics for the COVID-19 pandemic. The causal coronavirus (SARS-CoV-2) binds host cells via a trimeric Spike whose receptor binding domain (RBD) recognises angiotensin-converting enzyme 2 (ACE2), initiating conformational changes that drive membrane fusion. We find that the monoclonal antibody CR3022 binds the RBD tightly, neutralising SARS-CoV-2 and report the crystal structure at 2.4 Å of the Fab/RBD complex. Some crystals are suitable for screening for entry-blocking inhibitors. The highly conserved, structure-stabilising, CR3022 epitope is inaccessible in the prefusion Spike, suggesting that CR3022 binding facilitates conversion to the fusion-incompetent post-fusion state. Cryo-EM analysis confirms that incubation of Spike with CR3022 Fab leads to destruction of the prefusion trimer. Presentation of this cryptic epitope in an RBD-based vaccine might advantageously focus immune responses. Binders at this epitope may be useful therapeutically, possibly in synergy with an antibody blocking receptor attachment.	Jun 2020
I03-Macromolecular Crystallography	Megahertz serial crystallography Max O. Wiedorn , Dominik Oberthuer , Richard Bean , Robin Schubert , Nadine Werner , Brian Abbey , Martin Aepfelbacher , Luigi Adriano , Aschkan Allahgholi , Nasser Al-Qudami , Jakob Andreasson , Steve Aplin , Salah Awel , Kartik Ayyer , Saša Bajt , Imrich Barák , Sadia Bari , Johan Bielecki , Sabine Botha , Djelloul Boukhelef , Wolfgang Brehm , Sandor Brockhauser , Igor Cheviakov , Matthew A. Coleman , Francisco Cruz-Mazo , Cyril Danilevski , Connie Darmanin , R. Bruce Doak , Martin Domaracky , Katerina Dörner , Yang Du , Hans Fangohr , Holger Fleckenstein , Matthias Frank , Petra Fromme , Alfonso M. Gañán-Calvo , Yaroslav Gevorkov , Klaus Giewekemeyer , Helen Mary Ginn , Heinz Graafsma , Rita Graceffa , Dominic Greiffenberg , Lars Gumprecht , Peter Göttlicher , Janos Hajdu , Steffen Hauf , Michael Heymann , Susannah Holmes , Daniel A. Horke , Mark S. Hunter , Siegfried Imlau , Alexander Kaukher , Yoonhee Kim , Alexander Klyuev , Juraj Knoška , Bostjan Kobe , Manuela Kuhn , Christopher Kupitz , Jochen Küpper , Janine Mia Lahey-Rudolph , Torsten Laurus , Karoline Le Cong , Romain Letrun , P. Lourdu Xavier , Luis Maia , Filipe R. N. C. Maia , Valerio Mariani , Marc Messerschmidt , Markus Metz , Davide Mezza , Thomas Michelat , Grant Mills , Diana C. F. Monteiro , Andrew Morgan , Kerstin Mühlig , Anna Munke , Astrid Münnich , Julia Nette , Keith A. Nugent , Theresa Nuguid , Allen M. Orville , Suraj Pandey , Gisel Pena , Pablo Villanueva-Perez , Jennifer Poehlsen , Gianpietro Previtali , Lars Redecke , Winnie Maria Riekehr , Holger Rohde , Adam Round , Tatiana Safenreiter , Iosifina Sarrou , Tokushi Sato , Marius Schmidt , Bernd Schmitt , Robert Schönherr , Joachim Schulz , Jonas A. Sellberg , M. Marvin Seibert , Carolin Seuring , Megan L. Shelby , Robert L. Shoeman , Marcin Sikorski , Alessandro Silenzi , Claudiu A. Stan , Xintian Shi , Stephan Stern , Jola Sztuk-Dambietz , Janusz Szuba , Aleksandra Tolstikova , Martin Trebbin , Ulrich Trunk , Patrik Vagovic , Thomas Ve , Britta Weinhausen , Thomas A. White , Krzysztof Wrona , Chen Xu , Oleksandr Yefanov , Nadia Zatsepin , Jiaguo Zhang , Markus Perbandt , Adrian P. Mancuso , Christian Betzel , Henry Chapman , Anton Barty Nature Communications 9 DOI: 10.1038/s41467-018-06156-7 Open Access Show Abstract ▼ Abstract: The new European X-ray Free-Electron Laser is the first X-ray free-electron laser capable of delivering X-ray pulses with a megahertz inter-pulse spacing, more than four orders of magnitude higher than previously possible. However, to date, it has been unclear whether it would indeed be possible to measure high-quality diffraction data at megahertz pulse repetition rates. Here, we show that high-quality structures can indeed be obtained using currently available operating conditions at the European XFEL. We present two complete data sets, one from the well-known model system lysozyme and the other from a so far unknown complex of a β-lactamase from K. pneumoniae involved in antibiotic resistance. This result opens up megahertz serial femtosecond crystallography (SFX) as a tool for reliable structure determination, substrate screening and the efficient measurement of the evolution and dynamics of molecular structures using megahertz repetition rate pulses available at this new class of X-ray laser source.	Oct 2018
Talos-Talos Arctica at Diamond	Machining protein microcrystals for structure determination by electron diffraction Helen M. E. Duyvesteyn , Abhay Kotecha , Helen M. Ginn , Corey W. Hecksel , Emma V. Beale , Felix De Haas , Gwyndaf Evans , Peijun Zhang , Wah Chiu , David I. Stuart Proceedings Of The National Academy Of Sciences 74 DOI: 10.1073/pnas.1809978115 Open Access Show Abstract ▼ Abstract: We demonstrate that ion-beam milling of frozen, hydrated protein crystals to thin lamella preserves the crystal lattice to near-atomic resolution. This provides a vehicle for protein structure determination, bridging the crystal size gap between the nanometer scale of conventional electron diffraction and micron scale of synchrotron microfocus beamlines. The demonstration that atomic information can be retained suggests that milling could provide such detail on sections cut from vitrified cells.	Aug 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
NONE-No attached Diamond beamline	Where is crystallography going? Jonathan M. Grimes , David R. Hall , Alun W. Ashton , Gwyndaf Evans , Robin L. Owen , Armin Wagner , Katherine E. Mcauley , Frank Von Delft , Allen M. Orville , Thomas Sorensen , Martin A. Walsh , Helen Ginn , David I. Stuart Acta Crystallographica Section D Structural Biology 74, 152 - 166 DOI: 10.1107/S2059798317016709 Open Access Show Abstract ▼ Abstract: Macromolecular crystallography (MX) has been a motor for biology for over half a century and this continues apace. A series of revolutions, including the production of recombinant proteins and cryo-crystallography, have meant that MX has repeatedly reinvented itself to dramatically increase its reach. Over the last 30 years synchrotron radiation has nucleated a succession of advances, ranging from detectors to optics and automation. These advances, in turn, open up opportunities. For instance, a further order of magnitude could perhaps be gained in signal to noise for general synchrotron experiments. In addition, X-ray free-electron lasers offer to capture fragments of reciprocal space without radiation damage, and open up the subpicosecond regime of protein dynamics and activity. But electrons have recently stolen the limelight: so is X-ray crystallography in rude health, or will imaging methods, especially single-particle electron microscopy, render it obsolete for the most interesting biology, whilst electron diffraction enables structure determination from even the smallest crystals? We will lay out some information to help you decide.	Feb 2018
	Towards in cellulo virus crystallography Helen M. E. Duyvesteyn , Helen M. Ginn , Maija K. Pietila , Armin Wagner , Johan Hattne , Jonathan M. Grimes , Elina Hirvonen , Gwyndaf Evans , Marie-Laure Parsy , Nicholas K. Sauter , Aaron S. Brewster , Juha Huiskonen , David I. Stuart , Geoff Sutton , Dennis H. Bamford Scientific Reports 8 DOI: 10.1038/s41598-018-21693-3 Open Access Show Abstract ▼ Abstract: Viruses are a significant threat to both human health and the economy, and there is an urgent need for novel anti-viral drugs and vaccines. High-resolution viral structures inform our understanding of the virosphere, and inspire novel therapies. Here we present a method of obtaining such structural information that avoids potentially disruptive handling, by collecting diffraction data from intact infected cells. We identify a suitable combination of cell type and virus to accumulate particles in the cells, establish a suitable time point where most cells contain virus condensates and use electron microscopy to demonstrate that these are ordered crystalline arrays of empty capsids. We then use an X-ray free electron laser to provide extremely bright illumination of sub-micron intracellular condensates of bacteriophage phiX174 inside living Escherichia coli at room temperature. We have been able to collect low resolution diffraction data. Despite the limited resolution and completeness of these initial data, due to a far from optimal experimental setup, we have used novel methodology to determine a putative space group, unit cell dimensions, particle packing and likely maturation state of the particles.	Feb 2018
Detectors	The slip-and-slide algorithm: a refinement protocol for detector geometry Helen Mary Ginn , David Ian Stuart Journal Of Synchrotron Radiation 24, 1152 - 1162 DOI: 10.1107/S1600577517013327 Open Access Show Abstract ▼ Abstract: Geometry correction is traditionally plagued by mis-fitting of correlated parameters, leading to local minima which prevent further improvements. Segmented detectors pose an enhanced risk of mis-fitting: even a minor confusion of detector distance and panel separation can prevent improvement in data quality. The slip-and-slide algorithm breaks down effects of the correlated parameters and their associated target functions in a fundamental shift in the approach to the problem. Parameters are never refined against the components of the data to which they are insensitive, providing a dramatic boost in the exploitation of information from a very small number of diffraction patterns. This algorithm can be applied to exploit the adherence of the spot-finding results prior to indexing to a given lattice using unit-cell dimensions as a restraint. Alternatively, it can be applied to the predicted spot locations and the observed reflection positions after indexing from a smaller number of images. Thus, the indexing rate can be boosted by 5.8% using geometry refinement from only 125 indexed patterns or 500 unindexed patterns. In one example of cypovirus type 17 polyhedrin diffraction at the Linac Coherent Light Source, this geometry refinement reveals a detector tilt of 0.3° (resulting in a maximal Z-axis error of ∼0.5 mm from an average detector distance of ∼90 mm) whilst treating all panels independently. Re-indexing and integrating with updated detector geometry reduces systematic errors providing a boost in anomalous signal of sulfur atoms by 20%. Due to the refinement of decoupled parameters, this geometry method also reaches convergence.	Nov 2017
	High-speed fixed-target serial virus crystallography Philip Roedig , Helen M. Ginn , Tim Pakendorf , Geoff Sutton , Karl Harlos , Thomas S. Walter , Jan Meyer , Pontus Fischer , Ramona Duman , Ismo Vartiainen , Bernd Reime , Martin Warmer , Aaron S. Brewster , Iris D. Young , Tara Michels-Clark , Nicholas K. Sauter , Abhay Kotecha , James Kelly , David J. Rowlands , Marcin Sikorsky , Silke Nelson , Daniel S. Damiani , Roberto Alonso-Mori , Jingshan Ren , Elizabeth E. Fry , Christian David , David I. Stuart , Armin Wagner , Alke Meents Nature Methods 8 DOI: 10.1038/nmeth.4335 Show Abstract ▼ Abstract: We report a method for serial X-ray crystallography at X-ray free-electron lasers (XFELs), which allows for full use of the current 120-Hz repetition rate of the Linear Coherent Light Source (LCLS). Using a micropatterned silicon chip in combination with the high-speed Roadrunner goniometer for sample delivery, we were able to determine the crystal structures of the picornavirus bovine enterovirus 2 (BEV2) and the cytoplasmic polyhedrosis virus type 18 polyhedrin, with total data collection times of less than 14 and 10 min, respectively. Our method requires only micrograms of sample and should therefore broaden the applicability of serial femtosecond crystallography to challenging projects for which only limited sample amounts are available. By synchronizing the sample exchange to the XFEL repetition rate, our method allows for most efficient use of the limited beam time available at XFELs and should enable a substantial increase in sample throughput at these facilities.	Jun 2017
Detectors	Fixed target combined with spectral mapping: approaching 100% hit rates for serial crystallography Saeed Oghbaey , Antoine Sarracini , Helen M. Ginn , Olivier Pare-Labrosse , Anling Kuo , Alexander Marx , Sascha W. Epp , Darren A. Sherrell , Bryan T. Eger , Yinpeng Zhong , Rolf Loch , Valerio Mariani , Roberto Alonso-Mori , Silke Nelson , Henrik T. Lemke , Robin L. Owen , Arwen R. Pearson , David I. Stuart , Oliver P. Ernst , Henrike Mueller-Werkmeister , R. J. Dwayne Miller Acta Crystallographica Section D Structural Biology 72, 944 - 955 DOI: 10.1107/S2059798316010834 Show Abstract ▼ Abstract: The advent of ultrafast highly brilliant coherent X-ray free-electron laser sources has driven the development of novel structure-determination approaches for proteins, and promises visualization of protein dynamics on sub-picosecond timescales with full atomic resolution. Significant efforts are being applied to the development of sample-delivery systems that allow these unique sources to be most efficiently exploited for high-throughput serial femtosecond crystallography. Here, the next iteration of a fixed-target crystallography chip designed for rapid and reliable delivery of up to 11 259 protein crystals with high spatial precision is presented. An experimental scheme for predetermining the positions of crystals in the chip by means of in situ spectroscopy using a fiducial system for rapid, precise alignment and registration of the crystal positions is presented. This delivers unprecedented performance in serial crystallography experiments at room temperature under atmospheric pressure, giving a raw hit rate approaching 100% with an effective indexing rate of approximately 50%, increasing the efficiency of beam usage and allowing the method to be applied to systems where the number of crystals is limited.	Aug 2016

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