76
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Bajt S, Prasciolu M, Fleckenstein H, Domaracký M, Chapman HN, Morgan AJ, Yefanov O, Messerschmidt M, Du Y, Murray KT, Mariani V, Kuhn M, Aplin S, Pande K, Villanueva-Perez P, Stachnik K, Chen JPJ, Andrejczuk A, Meents A, Burkhardt A, Pennicard D, Huang X, Yan H, Nazaretski E, Chu YS, Hamm CE. X-ray focusing with efficient high-NA multilayer Laue lenses. LIGHT, SCIENCE & APPLICATIONS 2018; 7:17162. [PMID: 30839543 PMCID: PMC6060042 DOI: 10.1038/lsa.2017.162] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2017] [Revised: 11/19/2017] [Accepted: 11/20/2017] [Indexed: 05/22/2023]
Abstract
Multilayer Laue lenses are volume diffraction elements for the efficient focusing of X-rays. With a new manufacturing technique that we introduced, it is possible to fabricate lenses of sufficiently high numerical aperture (NA) to achieve focal spot sizes below 10 nm. The alternating layers of the materials that form the lens must span a broad range of thicknesses on the nanometer scale to achieve the necessary range of X-ray deflection angles required to achieve a high NA. This poses a challenge to both the accuracy of the deposition process and the control of the materials properties, which often vary with layer thickness. We introduced a new pair of materials-tungsten carbide and silicon carbide-to prepare layered structures with smooth and sharp interfaces and with no material phase transitions that hampered the manufacture of previous lenses. Using a pair of multilayer Laue lenses (MLLs) fabricated from this system, we achieved a two-dimensional focus of 8.4 × 6.8 nm2 at a photon energy of 16.3 keV with high diffraction efficiency and demonstrated scanning-based imaging of samples with a resolution well below 10 nm. The high NA also allowed projection holographic imaging with strong phase contrast over a large range of magnifications. An error analysis indicates the possibility of achieving 1 nm focusing.
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77
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Oberthuer D, Knoška J, Wiedorn MO, Bajt S, Chapman HN. Time-resolved mixing-jet X-ray free-electron laser crystallography experiments. Acta Crystallogr A Found Adv 2017. [DOI: 10.1107/s2053273317087393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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78
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Meents A, Wiedorn MO, Srajer V, Henning R, Sarrou I, Bergtholdt J, Barthelmess M, Reinke PYA, Dierksmeyer D, Tolstikova A, Schaible S, Messerschmidt M, Ogata CM, Kissick DJ, Taft MH, Manstein DJ, Lieske J, Oberthuer D, Fischetti RF, Chapman HN. Pink-beam serial crystallography. Nat Commun 2017; 8:1281. [PMID: 29097720 PMCID: PMC5668288 DOI: 10.1038/s41467-017-01417-3] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Accepted: 09/14/2017] [Indexed: 02/02/2023] Open
Abstract
Serial X-ray crystallography allows macromolecular structure determination at both X-ray free electron lasers (XFELs) and, more recently, synchrotron sources. The time resolution for serial synchrotron crystallography experiments has been limited to millisecond timescales with monochromatic beams. The polychromatic, "pink", beam provides a more than two orders of magnitude increased photon flux and hence allows accessing much shorter timescales in diffraction experiments at synchrotron sources. Here we report the structure determination of two different protein samples by merging pink-beam diffraction patterns from many crystals, each collected with a single 100 ps X-ray pulse exposure per crystal using a setup optimized for very low scattering background. In contrast to experiments with monochromatic radiation, data from only 50 crystals were required to obtain complete datasets. The high quality of the diffraction data highlights the potential of this method for studying irreversible reactions at sub-microsecond timescales using high-brightness X-ray facilities.
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79
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Wiedorn MO, Awel S, Morgan AJ, Barthelmess M, Bean R, Beyerlein KR, Chavas LMG, Eckerskorn N, Fleckenstein H, Heymann M, Horke DA, Knoška J, Mariani V, Oberthür D, Roth N, Yefanov O, Barty A, Bajt S, Küpper J, Rode AV, Kirian RA, Chapman HN. Post-sample aperture for low background diffraction experiments at X-ray free-electron lasers. JOURNAL OF SYNCHROTRON RADIATION 2017; 24:1296-1298. [PMID: 29091073 PMCID: PMC5665296 DOI: 10.1107/s1600577517011961] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2017] [Accepted: 08/18/2017] [Indexed: 06/07/2023]
Abstract
The success of diffraction experiments from weakly scattering samples strongly depends on achieving an optimal signal-to-noise ratio. This is particularly important in single-particle imaging experiments where diffraction signals are typically very weak and the experiments are often accompanied by significant background scattering. A simple way to tremendously reduce background scattering by placing an aperture downstream of the sample has been developed and its application in a single-particle X-ray imaging experiment at FLASH is demonstrated. Using the concept of a post-sample aperture it was possible to reduce the background scattering levels by two orders of magnitude.
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80
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Wojtas DH, Ayyer K, Liang M, Mossou E, Romoli F, Seuring C, Beyerlein KR, Bean RJ, Morgan AJ, Oberthuer D, Fleckenstein H, Heymann M, Gati C, Yefanov O, Barthelmess M, Ornithopoulou E, Galli L, Xavier PL, Ling WL, Frank M, Yoon CH, White TA, Bajt S, Mitraki A, Boutet S, Aquila A, Barty A, Forsyth VT, Chapman HN, Millane RP. Analysis of XFEL serial diffraction data from individual crystalline fibrils. IUCRJ 2017; 4:795-811. [PMID: 29123682 PMCID: PMC5668865 DOI: 10.1107/s2052252517014324] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Accepted: 10/04/2017] [Indexed: 06/07/2023]
Abstract
Serial diffraction data collected at the Linac Coherent Light Source from crystalline amyloid fibrils delivered in a liquid jet show that the fibrils are well oriented in the jet. At low fibril concentrations, diffraction patterns are recorded from single fibrils; these patterns are weak and contain only a few reflections. Methods are developed for determining the orientation of patterns in reciprocal space and merging them in three dimensions. This allows the individual structure amplitudes to be calculated, thus overcoming the limitations of orientation and cylindrical averaging in conventional fibre diffraction analysis. The advantages of this technique should allow structural studies of fibrous systems in biology that are inaccessible using existing techniques.
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81
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Beyerlein KR, Dierksmeyer D, Mariani V, Kuhn M, Sarrou I, Ottaviano A, Awel S, Knoska J, Fuglerud S, Jönsson O, Stern S, Wiedorn MO, Yefanov O, Adriano L, Bean R, Burkhardt A, Fischer P, Heymann M, Horke DA, Jungnickel KEJ, Kovaleva E, Lorbeer O, Metz M, Meyer J, Morgan A, Pande K, Panneerselvam S, Seuring C, Tolstikova A, Lieske J, Aplin S, Roessle M, White TA, Chapman HN, Meents A, Oberthuer D. Mix-and-diffuse serial synchrotron crystallography. IUCRJ 2017; 4:769-777. [PMID: 29123679 PMCID: PMC5668862 DOI: 10.1107/s2052252517013124] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 09/13/2017] [Indexed: 05/21/2023]
Abstract
Unravelling the interaction of biological macromolecules with ligands and substrates at high spatial and temporal resolution remains a major challenge in structural biology. The development of serial crystallography methods at X-ray free-electron lasers and subsequently at synchrotron light sources allows new approaches to tackle this challenge. Here, a new polyimide tape drive designed for mix-and-diffuse serial crystallography experiments is reported. The structure of lysozyme bound by the competitive inhibitor chitotriose was determined using this device in combination with microfluidic mixers. The electron densities obtained from mixing times of 2 and 50 s show clear binding of chitotriose to the enzyme at a high level of detail. The success of this approach shows the potential for high-throughput drug screening and even structural enzymology on short timescales at bright synchrotron light sources.
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82
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Chapman HN, Fromme P. Structure determination based on continuous diffraction from macromolecular crystals. Curr Opin Struct Biol 2017; 45:170-177. [PMID: 28917122 DOI: 10.1016/j.sbi.2017.07.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 07/14/2017] [Accepted: 07/31/2017] [Indexed: 11/19/2022]
Abstract
Bright and coherent X-ray sources, such free-electron lasers, have spurred large activities in developing new methods to obtain the structures of biological macromolecules. In particular, single-molecule diffraction is highly desired, as it would abolish the need for crystallization. It provides considerably more diffraction intensity information than needed to solve a structure, unlike crystal diffraction, which is usually insufficient for direct phasing. To overcome the challenge of weak scattering signals of single molecules, the direct phasing approaches in coherent diffractive imaging have been combined with crystals in several imaginative ways. One of these, using crystals with translational disorder, has been used to phase continuous femtosecond X-ray diffraction data from photosystem II complexes, offering a paradigm shift in crystallography.
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83
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Zhou XE, He Y, de Waal PW, Gao X, Kang Y, Van Eps N, Yin Y, Pal K, Goswami D, White TA, Barty A, Latorraca NR, Chapman HN, Hubbell WL, Dror RO, Stevens RC, Cherezov V, Gurevich VV, Griffin PR, Ernst OP, Melcher K, Xu HE. Identification of Phosphorylation Codes for Arrestin Recruitment by G Protein-Coupled Receptors. Cell 2017; 170:457-469.e13. [PMID: 28753425 DOI: 10.1016/j.cell.2017.07.002] [Citation(s) in RCA: 288] [Impact Index Per Article: 41.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Revised: 05/04/2017] [Accepted: 07/06/2017] [Indexed: 01/11/2023]
Abstract
G protein-coupled receptors (GPCRs) mediate diverse signaling in part through interaction with arrestins, whose binding promotes receptor internalization and signaling through G protein-independent pathways. High-affinity arrestin binding requires receptor phosphorylation, often at the receptor's C-terminal tail. Here, we report an X-ray free electron laser (XFEL) crystal structure of the rhodopsin-arrestin complex, in which the phosphorylated C terminus of rhodopsin forms an extended intermolecular β sheet with the N-terminal β strands of arrestin. Phosphorylation was detected at rhodopsin C-terminal tail residues T336 and S338. These two phospho-residues, together with E341, form an extensive network of electrostatic interactions with three positively charged pockets in arrestin in a mode that resembles binding of the phosphorylated vasopressin-2 receptor tail to β-arrestin-1. Based on these observations, we derived and validated a set of phosphorylation codes that serve as a common mechanism for phosphorylation-dependent recruitment of arrestins by GPCRs.
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84
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Classen A, Ayyer K, Chapman HN, Röhlsberger R, von Zanthier J. Incoherent Diffractive Imaging via Intensity Correlations of Hard X Rays. PHYSICAL REVIEW LETTERS 2017; 119:053401. [PMID: 28949712 DOI: 10.1103/physrevlett.119.053401] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Indexed: 06/07/2023]
Abstract
Established x-ray diffraction methods allow for high-resolution structure determination of crystals, crystallized protein structures, or even single molecules. While these techniques rely on coherent scattering, incoherent processes like fluorescence emission-often the predominant scattering mechanism-are generally considered detrimental for imaging applications. Here, we show that intensity correlations of incoherently scattered x-ray radiation can be used to image the full 3D arrangement of the scattering atoms with significantly higher resolution compared to conventional coherent diffraction imaging and crystallography, including additional three-dimensional information in Fourier space for a single sample orientation. We present a number of properties of incoherent diffractive imaging that are conceptually superior to those of coherent methods.
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85
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Beyerlein KR, White TA, Yefanov O, Gati C, Kazantsev IG, Nielsen NFG, Larsen PM, Chapman HN, Schmidt S. FELIX: an algorithm for indexing multiple crystallites in X-ray free-electron laser snapshot diffraction images. J Appl Crystallogr 2017; 50:1075-1083. [PMID: 28808433 PMCID: PMC5541352 DOI: 10.1107/s1600576717007506] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 05/21/2017] [Indexed: 01/31/2023] Open
Abstract
A novel algorithm for indexing multiple crystals in snapshot X-ray diffraction images, especially suited for serial crystallography data, is presented. The algorithm, FELIX, utilizes a generalized parametrization of the Rodrigues-Frank space, in which all crystal systems can be represented without singularities. The new algorithm is shown to be capable of indexing more than ten crystals per image in simulations of cubic, tetragonal and monoclinic crystal diffraction patterns. It is also used to index an experimental serial crystallography dataset from lysozyme microcrystals. The increased number of indexed crystals is shown to result in a better signal-to-noise ratio, and fewer images are needed to achieve the same data quality as when indexing one crystal per image. The relative orientations between the multiple crystals indexed in an image show a slight tendency of the lysozme microcrystals to adhere on ([Formula: see text]10) facets.
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86
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Chapman HN, Yefanov OM, Ayyer K, White TA, Barty A, Morgan A, Mariani V, Oberthuer D, Pande K. Continuous diffraction of molecules and disordered molecular crystals. J Appl Crystallogr 2017; 50:1084-1103. [PMID: 28808434 PMCID: PMC5541353 DOI: 10.1107/s160057671700749x] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Accepted: 05/21/2017] [Indexed: 11/25/2022] Open
Abstract
The intensities of far-field diffraction patterns of orientationally aligned molecules obey Wilson statistics, whether those molecules are in isolation (giving rise to a continuous diffraction pattern) or arranged in a crystal (giving rise to Bragg peaks). Ensembles of molecules in several orientations, but uncorrelated in position, give rise to the incoherent sum of the diffraction from those objects, modifying the statistics in a similar way as crystal twinning modifies the distribution of Bragg intensities. This situation arises in the continuous diffraction of laser-aligned molecules or translationally disordered molecular crystals. This paper develops the analysis of the intensity statistics of such continuous diffraction to obtain parameters such as scaling, beam coherence and the number of contributing independent object orientations. When measured, continuous molecular diffraction is generally weak and accompanied by a background that far exceeds the strength of the signal. Instead of just relying upon the smallest measured intensities or their mean value to guide the subtraction of the background, it is shown how all measured values can be utilized to estimate the background, noise and signal, by employing a modified 'noisy Wilson' distribution that explicitly includes the background. Parameters relating to the background and signal quantities can be estimated from the moments of the measured intensities. The analysis method is demonstrated on previously published continuous diffraction data measured from crystals of photosystem II [Ayyer et al. (2016 ▸), Nature, 530, 202-206].
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87
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Kupitz C, Olmos JL, Holl M, Tremblay L, Pande K, Pandey S, Oberthür D, Hunter M, Liang M, Aquila A, Tenboer J, Calvey G, Katz A, Chen Y, Wiedorn MO, Knoska J, Meents A, Majriani V, Norwood T, Poudyal I, Grant T, Miller MD, Xu W, Tolstikova A, Morgan A, Metz M, Martin-Garcia JM, Zook JD, Roy-Chowdhury S, Coe J, Nagaratnam N, Meza D, Fromme R, Basu S, Frank M, White T, Barty A, Bajt S, Yefanov O, Chapman HN, Zatsepin N, Nelson G, Weierstall U, Spence J, Schwander P, Pollack L, Fromme P, Ourmazd A, Phillips GN, Schmidt M. Structural enzymology using X-ray free electron lasers. STRUCTURAL DYNAMICS (MELVILLE, N.Y.) 2017; 4:044003. [PMID: 28083542 PMCID: PMC5178802 DOI: 10.1063/1.4972069] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 11/29/2016] [Indexed: 05/18/2023]
Abstract
Mix-and-inject serial crystallography (MISC) is a technique designed to image enzyme catalyzed reactions in which small protein crystals are mixed with a substrate just prior to being probed by an X-ray pulse. This approach offers several advantages over flow cell studies. It provides (i) room temperature structures at near atomic resolution, (ii) time resolution ranging from microseconds to seconds, and (iii) convenient reaction initiation. It outruns radiation damage by using femtosecond X-ray pulses allowing damage and chemistry to be separated. Here, we demonstrate that MISC is feasible at an X-ray free electron laser by studying the reaction of M. tuberculosis ß-lactamase microcrystals with ceftriaxone antibiotic solution. Electron density maps of the apo-ß-lactamase and of the ceftriaxone bound form were obtained at 2.8 Å and 2.4 Å resolution, respectively. These results pave the way to study cyclic and non-cyclic reactions and represent a new field of time-resolved structural dynamics for numerous substrate-triggered biological reactions.
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88
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Gati C, Oberthuer D, Yefanov O, Bunker RD, Metcalf P, Barty A, Chapman HN. Atomic structure of granulin determined from native nanocrystalline granulovirus using an X-ray free-electron laser. Acta Crystallogr A Found Adv 2017. [DOI: 10.1107/s0108767317097124] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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89
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Abstract
The intense X-ray pulses from free-electron lasers, of only femtoseconds duration, outrun most of the processes that lead to structural degradation in X-ray exposures of macromolecules. Using these sources it is therefore possible to increase the dose to macromolecular crystals by several orders of magnitude higher than usually tolerable in conventional measurements, allowing crystal size to be decreased dramatically in diffraction measurements and without the need to cool the sample. Such pulses lead to the eventual vaporization of the sample, which has required a measurement approach, called serial crystallography, of consolidating snapshot diffraction patterns of many individual crystals. This in turn has further separated the connection between dose and obtainable diffraction information, with the only requirement from a single pattern being that to give enough information to place it, in three-dimensional reciprocal space, in relation to other patterns. Millions of extremely weak patterns can be collected and combined in this way, requiring methods to rapidly replenish the sample into the beam while generating the lowest possible background . The method is suited to time-resolved measurements over timescales below 1 ps to several seconds, and opens new opportunities for phasing. Some straightforward considerations of achievable signal levels are discussed and compared with a wide variety of recent experiments carried out at XFEL, synchrotron, and even laboratory sources, to discuss the capabilities of these new approaches and give some perspectives on their further development.
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90
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Oberthür D, Knoska J, Wiedorn M, Seuring C, Beyerlein K, Gumprecht L, Barty A, Meents A, Bajt S, Chapman HN. Developing and optimizing serial crystallography for static and dynamic structural biology. Acta Crystallogr A Found Adv 2016. [DOI: 10.1107/s2053273316097278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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91
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Nogly P, Panneels V, Nelson G, Gati C, Kimura T, Milne C, Milathianaki D, Kubo M, Wu W, Conrad C, Coe J, Bean R, Zhao Y, Båth P, Dods R, Harimoorthy R, Beyerlein KR, Rheinberger J, James D, DePonte D, Li C, Sala L, Williams GJ, Hunter MS, Koglin JE, Berntsen P, Nango E, Iwata S, Chapman HN, Fromme P, Frank M, Abela R, Boutet S, Barty A, White TA, Weierstall U, Spence J, Neutze R, Schertler G, Standfuss J. Lipidic cubic phase injector is a viable crystal delivery system for time-resolved serial crystallography. Nat Commun 2016; 7:12314. [PMID: 27545823 PMCID: PMC4996941 DOI: 10.1038/ncomms12314] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Accepted: 06/22/2016] [Indexed: 01/12/2023] Open
Abstract
Serial femtosecond crystallography (SFX) using X-ray free-electron laser sources is an emerging method with considerable potential for time-resolved pump-probe experiments. Here we present a lipidic cubic phase SFX structure of the light-driven proton pump bacteriorhodopsin (bR) to 2.3 Å resolution and a method to investigate protein dynamics with modest sample requirement. Time-resolved SFX (TR-SFX) with a pump-probe delay of 1 ms yields difference Fourier maps compatible with the dark to M state transition of bR. Importantly, the method is very sample efficient and reduces sample consumption to about 1 mg per collected time point. Accumulation of M intermediate within the crystal lattice is confirmed by time-resolved visible absorption spectroscopy. This study provides an important step towards characterizing the complete photocycle dynamics of retinal proteins and demonstrates the feasibility of a sample efficient viscous medium jet for TR-SFX.
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92
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van der Schot G, Svenda M, Maia FRNC, Hantke MF, DePonte DP, Seibert MM, Aquila A, Schulz J, Kirian RA, Liang M, Stellato F, Bari S, Iwan B, Andreasson J, Timneanu N, Bielecki J, Westphal D, Nunes de Almeida F, Odić D, Hasse D, Carlsson GH, Larsson DSD, Barty A, Martin AV, Schorb S, Bostedt C, Bozek JD, Carron S, Ferguson K, Rolles D, Rudenko A, Epp SW, Foucar L, Rudek B, Erk B, Hartmann R, Kimmel N, Holl P, Englert L, Loh ND, Chapman HN, Andersson I, Hajdu J, Ekeberg T. Open data set of live cyanobacterial cells imaged using an X-ray laser. Sci Data 2016; 3:160058. [PMID: 27479514 PMCID: PMC4968219 DOI: 10.1038/sdata.2016.58] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 05/18/2016] [Indexed: 01/20/2023] Open
Abstract
Structural studies on living cells by conventional methods are limited to low resolution because radiation damage kills cells long before the necessary dose for high resolution can be delivered. X-ray free-electron lasers circumvent this problem by outrunning key damage processes with an ultra-short and extremely bright coherent X-ray pulse. Diffraction-before-destruction experiments provide high-resolution data from cells that are alive when the femtosecond X-ray pulse traverses the sample. This paper presents two data sets from micron-sized cyanobacteria obtained at the Linac Coherent Light Source, containing a total of 199,000 diffraction patterns. Utilizing this type of diffraction data will require the development of new analysis methods and algorithms for studying structure and structural variability in large populations of cells and to create abstract models. Such studies will allow us to understand living cells and populations of cells in new ways. New X-ray lasers, like the European XFEL, will produce billions of pulses per day, and could open new areas in structural sciences.
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93
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Hantke MF, Hasse D, Ekeberg T, John K, Svenda M, Loh D, Martin AV, Timneanu N, Larsson DSD, van der Schot G, Carlsson GH, Ingelman M, Andreasson J, Westphal D, Iwan B, Uetrecht C, Bielecki J, Liang M, Stellato F, DePonte DP, Bari S, Hartmann R, Kimmel N, Kirian RA, Seibert MM, Mühlig K, Schorb S, Ferguson K, Bostedt C, Carron S, Bozek JD, Rolles D, Rudenko A, Foucar L, Epp SW, Chapman HN, Barty A, Andersson I, Hajdu J, Maia FRNC. A data set from flash X-ray imaging of carboxysomes. Sci Data 2016; 3:160061. [PMID: 27479842 DOI: 10.1038/nphoton.2014.270] [Citation(s) in RCA: 97] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 06/01/2016] [Indexed: 05/26/2023] Open
Abstract
Ultra-intense femtosecond X-ray pulses from X-ray lasers permit structural studies on single particles and biomolecules without crystals. We present a large data set on inherently heterogeneous, polyhedral carboxysome particles. Carboxysomes are cell organelles that vary in size and facilitate up to 40% of Earth's carbon fixation by cyanobacteria and certain proteobacteria. Variation in size hinders crystallization. Carboxysomes appear icosahedral in the electron microscope. A protein shell encapsulates a large number of Rubisco molecules in paracrystalline arrays inside the organelle. We used carboxysomes with a mean diameter of 115±26 nm from Halothiobacillus neapolitanus. A new aerosol sample-injector allowed us to record 70,000 low-noise diffraction patterns in 12 min. Every diffraction pattern is a unique structure measurement and high-throughput imaging allows sampling the space of structural variability. The different structures can be separated and phased directly from the diffraction data and open a way for accurate, high-throughput studies on structures and structural heterogeneity in biology and elsewhere.
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94
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Munke A, Andreasson J, Aquila A, Awel S, Ayyer K, Barty A, Bean RJ, Berntsen P, Bielecki J, Boutet S, Bucher M, Chapman HN, Daurer BJ, DeMirci H, Elser V, Fromme P, Hajdu J, Hantke MF, Higashiura A, Hogue BG, Hosseinizadeh A, Kim Y, Kirian RA, Reddy HKN, Lan TY, Larsson DSD, Liu H, Loh ND, Maia FRNC, Mancuso AP, Mühlig K, Nakagawa A, Nam D, Nelson G, Nettelblad C, Okamoto K, Ourmazd A, Rose M, van der Schot G, Schwander P, Seibert MM, Sellberg JA, Sierra RG, Song C, Svenda M, Timneanu N, Vartanyants IA, Westphal D, Wiedorn MO, Williams GJ, Xavier PL, Yoon CH, Zook J. Coherent diffraction of single Rice Dwarf virus particles using hard X-rays at the Linac Coherent Light Source. Sci Data 2016; 3:160064. [PMID: 27478984 PMCID: PMC4968191 DOI: 10.1038/sdata.2016.64] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 06/22/2016] [Indexed: 11/09/2022] Open
Abstract
Single particle diffractive imaging data from Rice Dwarf Virus (RDV) were recorded using the Coherent X-ray Imaging (CXI) instrument at the Linac Coherent Light Source (LCLS). RDV was chosen as it is a well-characterized model system, useful for proof-of-principle experiments, system optimization and algorithm development. RDV, an icosahedral virus of about 70 nm in diameter, was aerosolized and injected into the approximately 0.1 μm diameter focused hard X-ray beam at the CXI instrument of LCLS. Diffraction patterns from RDV with signal to 5.9 Ångström were recorded. The diffraction data are available through the Coherent X-ray Imaging Data Bank (CXIDB) as a resource for algorithm development, the contents of which are described here.
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95
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Mariani V, Morgan A, Yoon CH, Lane TJ, White TA, O’Grady C, Kuhn M, Aplin S, Koglin J, Barty A, Chapman HN. OnDA: online data analysis and feedback for serial X-ray imaging. J Appl Crystallogr 2016; 49:1073-1080. [PMID: 27275150 PMCID: PMC4886993 DOI: 10.1107/s1600576716007469] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Accepted: 05/04/2016] [Indexed: 11/10/2022] Open
Abstract
This article describes a free and open-source data analysis utility designed for fast online feedback during serial X-ray diffraction and scattering experiments: OnDA (online data analysis). Three complete real-time monitors for common types of serial X-ray imaging experiments are presented. These monitors are capable of providing the essential information required for quick decision making in the face of extreme rates of data collection. In addition, a set of modules, functions and algorithms that allow developers to modify the provided monitors or develop new ones are provided. The emphasis here is on simple, modular and scalable code that is based on open-source libraries and protocols. OnDA monitors have already proven to be invaluable tools in several experiments, especially for scoring and monitoring of diffraction data during serial crystallography experiments at both free-electron laser and synchrotron facilities. It is felt that in the future the kind of fast feedback that OnDA monitors provide will help researchers to deal with the expected very high throughput data flow at next-generation facilities such as the European X-ray free-electron laser.
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96
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Nelson G, Kirian RA, Weierstall U, Zatsepin NA, Faragó T, Baumbach T, Wilde F, Niesler FBP, Zimmer B, Ishigami I, Hikita M, Bajt S, Yeh SR, Rousseau DL, Chapman HN, Spence JCH, Heymann M. Three-dimensional-printed gas dynamic virtual nozzles for x-ray laser sample delivery. OPTICS EXPRESS 2016; 24:11515-30. [PMID: 27410079 PMCID: PMC5025224 DOI: 10.1364/oe.24.011515] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Reliable sample delivery is essential to biological imaging using X-ray Free Electron Lasers (XFELs). Continuous injection using the Gas Dynamic Virtual Nozzle (GDVN) has proven valuable, particularly for time-resolved studies. However, many important aspects of GDVN functionality have yet to be thoroughly understood and/or refined due to fabrication limitations. We report the application of 2-photon polymerization as a form of high-resolution 3D printing to fabricate high-fidelity GDVNs with submicron resolution. This technique allows rapid prototyping of a wide range of different types of nozzles from standard CAD drawings and optimization of crucial dimensions for optimal performance. Three nozzles were tested with pure water to determine general nozzle performance and reproducibility, with nearly reproducible off-axis jetting being the result. X-ray tomography and index matching were successfully used to evaluate the interior nozzle structures and identify the cause of off-axis jetting. Subsequent refinements to fabrication resulted in straight jetting. A performance test of printed nozzles at an XFEL provided high quality femtosecond diffraction patterns.
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97
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Pande K, Hutchison CDM, Groenhof G, Aquila A, Robinson JS, Tenboer J, Basu S, Boutet S, DePonte DP, Liang M, White TA, Zatsepin NA, Yefanov O, Morozov D, Oberthuer D, Gati C, Subramanian G, James D, Zhao Y, Koralek J, Brayshaw J, Kupitz C, Conrad C, Roy-Chowdhury S, Coe JD, Metz M, Xavier PL, Grant TD, Koglin JE, Ketawala G, Fromme R, Šrajer V, Henning R, Spence JCH, Ourmazd A, Schwander P, Weierstall U, Frank M, Fromme P, Barty A, Chapman HN, Moffat K, van Thor JJ, Schmidt M. Femtosecond structural dynamics drives the trans/cis isomerization in photoactive yellow protein. Science 2016; 352:725-9. [PMID: 27151871 DOI: 10.1126/science.aad5081] [Citation(s) in RCA: 286] [Impact Index Per Article: 35.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2015] [Accepted: 04/05/2016] [Indexed: 11/02/2022]
Abstract
A variety of organisms have evolved mechanisms to detect and respond to light, in which the response is mediated by protein structural changes after photon absorption. The initial step is often the photoisomerization of a conjugated chromophore. Isomerization occurs on ultrafast time scales and is substantially influenced by the chromophore environment. Here we identify structural changes associated with the earliest steps in the trans-to-cis isomerization of the chromophore in photoactive yellow protein. Femtosecond hard x-ray pulses emitted by the Linac Coherent Light Source were used to conduct time-resolved serial femtosecond crystallography on photoactive yellow protein microcrystals over a time range from 100 femtoseconds to 3 picoseconds to determine the structural dynamics of the photoisomerization reaction.
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98
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Zhou XE, Gao X, Barty A, Kang Y, He Y, Liu W, Ishchenko A, White TA, Yefanov O, Han GW, Xu Q, de Waal PW, Suino-Powell KM, Boutet S, Williams GJ, Wang M, Li D, Caffrey M, Chapman HN, Spence JCH, Fromme P, Weierstall U, Stevens RC, Cherezov V, Melcher K, Xu HE. X-ray laser diffraction for structure determination of the rhodopsin-arrestin complex. Sci Data 2016; 3:160021. [PMID: 27070998 PMCID: PMC4828943 DOI: 10.1038/sdata.2016.21] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Accepted: 02/25/2016] [Indexed: 01/01/2023] Open
Abstract
Serial femtosecond X-ray crystallography (SFX) using an X-ray free electron laser (XFEL) is a recent advancement in structural biology for solving crystal structures of challenging membrane proteins, including G-protein coupled receptors (GPCRs), which often only produce microcrystals. An XFEL delivers highly intense X-ray pulses of femtosecond duration short enough to enable the collection of single diffraction images before significant radiation damage to crystals sets in. Here we report the deposition of the XFEL data and provide further details on crystallization, XFEL data collection and analysis, structure determination, and the validation of the structural model. The rhodopsin-arrestin crystal structure solved with SFX represents the first near-atomic resolution structure of a GPCR-arrestin complex, provides structural insights into understanding of arrestin-mediated GPCR signaling, and demonstrates the great potential of this SFX-XFEL technology for accelerating crystal structure determination of challenging proteins and protein complexes.
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99
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White TA, Mariani V, Brehm W, Yefanov O, Barty A, Beyerlein KR, Chervinskii F, Galli L, Gati C, Nakane T, Tolstikova A, Yamashita K, Yoon CH, Diederichs K, Chapman HN. Recent developments in CrystFEL. J Appl Crystallogr 2016; 49:680-689. [PMID: 27047311 PMCID: PMC4815879 DOI: 10.1107/s1600576716004751] [Citation(s) in RCA: 183] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Accepted: 03/21/2016] [Indexed: 12/04/2022] Open
Abstract
CrystFEL is a suite of programs for processing data from 'serial crystallography' experiments, which are usually performed using X-ray free-electron lasers (FELs) but also increasingly with other X-ray sources. The CrystFEL software suite has been under development since 2009, just before the first hard FEL experiments were performed, and has been significantly updated and improved since then. This article describes the most important improvements which have been made to CrystFEL since the first release version. These changes include the addition of new programs to the suite, the ability to resolve 'indexing ambiguities' and several ways to improve the quality of the integrated data by more accurately modelling the underlying diffraction physics.
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100
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Awel S, Kirian RA, Eckerskorn N, Wiedorn M, Horke DA, Rode AV, Küpper J, Chapman HN. Visualizing aerosol-particle injection for diffractive-imaging experiments. OPTICS EXPRESS 2016; 24:6507-21. [PMID: 27136841 DOI: 10.1364/oe.24.006507] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Delivering sub-micrometer particles to an intense x-ray focus is a crucial aspect of single-particle diffractive-imaging experiments at x-ray free-electron lasers. Enabling direct visualization of sub-micrometer aerosol particle streams without interfering with the operation of the particle injector can greatly improve the overall efficiency of single-particle imaging experiments by reducing the amount of time and sample consumed during measurements. We have developed in-situ non-destructive imaging diagnostics to aid real-time particle injector optimization and x-ray/particle-beam alignment, based on laser illumination schemes and fast imaging detectors. Our diagnostics are constructed to provide a non-invasive rapid feedback on injector performance during measurements, and have been demonstrated during diffraction measurements at the FLASH free-electron laser.
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