+Open data
-Basic information
Entry | Database: PDB / ID: 5z9w | ||||||||||||||||||||||||||||||
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Title | Ebola virus nucleoprotein-RNA complex | ||||||||||||||||||||||||||||||
Components |
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Keywords | VIRAL PROTEIN / ebolavirus / RNA / nucleoprotein / nucleocapsid / helical | ||||||||||||||||||||||||||||||
Function / homology | Function and homology information viral RNA genome packaging / helical viral capsid / viral nucleocapsid / host cell cytoplasm / ribonucleoprotein complex / RNA binding Similarity search - Function | ||||||||||||||||||||||||||||||
Biological species | Homo sapiens (human) synthetic construct (others) | ||||||||||||||||||||||||||||||
Method | ELECTRON MICROSCOPY / helical reconstruction / cryo EM / Resolution: 3.6 Å | ||||||||||||||||||||||||||||||
Authors | Sugita, Y. / Matsunami, H. / Kawaoka, Y. / Noda, T. / Wolf, M. | ||||||||||||||||||||||||||||||
Funding support | Japan, 9items
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Citation | Journal: Nature / Year: 2018 Title: Cryo-EM structure of the Ebola virus nucleoprotein-RNA complex at 3.6 Å resolution. Authors: Yukihiko Sugita / Hideyuki Matsunami / Yoshihiro Kawaoka / Takeshi Noda / Matthias Wolf / Abstract: Ebola virus causes haemorrhagic fever with a high fatality rate in humans and non-human primates. It belongs to the family Filoviridae in the order Mononegavirales, which are viruses that contain ...Ebola virus causes haemorrhagic fever with a high fatality rate in humans and non-human primates. It belongs to the family Filoviridae in the order Mononegavirales, which are viruses that contain linear, non-segmented, negative-sense, single-stranded genomic RNA. The enveloped, filamentous virion contains the nucleocapsid, consisting of the helical nucleoprotein-RNA complex, VP24, VP30, VP35 and viral polymerase. The nucleoprotein-RNA complex acts as a scaffold for nucleocapsid formation and as a template for RNA replication and transcription by condensing RNA into the virion. RNA binding and nucleoprotein oligomerization are synergistic and do not readily occur independently. Although recent cryo-electron tomography studies have revealed the overall architecture of the nucleocapsid core, there has been no high-resolution reconstruction of the nucleocapsid. Here we report the structure of a recombinant Ebola virus nucleoprotein-RNA complex expressed in mammalian cells without chemical fixation, at near-atomic resolution using single-particle cryo-electron microscopy. Our structure reveals how the Ebola virus nucleocapsid core encapsidates its viral genome, its sequence-independent coordination with RNA by nucleoprotein, and the dynamic transition between the RNA-free and RNA-bound states. It provides direct structural evidence for the role of the N terminus of nucleoprotein in subunit oligomerization, and for the hydrophobic and electrostatic interactions that lead to the formation of the helical assembly. The structure is validated as representative of the native biological assembly of the nucleocapsid core by consistent dimensions and symmetry with the full virion. The atomic model provides a detailed mechanistic basis for understanding nucleocapsid assembly and highlights key structural features that may serve as targets for anti-viral drug development. | ||||||||||||||||||||||||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | Molecule: MolmilJmol/JSmol |
-Downloads & links
-Download
PDBx/mmCIF format | 5z9w.cif.gz | 86.1 KB | Display | PDBx/mmCIF format |
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PDB format | pdb5z9w.ent.gz | 63.1 KB | Display | PDB format |
PDBx/mmJSON format | 5z9w.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/z9/5z9w ftp://data.pdbj.org/pub/pdb/validation_reports/z9/5z9w | HTTPS FTP |
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-Related structure data
Related structure data | 6903MC M: map data used to model this data C: citing same article (ref.) |
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Similar structure data |
-Links
-Assembly
Deposited unit |
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1 |
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Symmetry | Helical symmetry: (Num. of operations: 51 ) |
-Components
#1: Protein | Mass: 43496.086 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Cell (production host): epithelial / Cell line (production host): HEK293T / Production host: Homo sapiens (human) / Tissue (production host): embryonic kidney / References: UniProt: P18272*PLUS |
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#2: RNA chain | Mass: 1792.037 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others) |
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: HELICAL ARRAY / 3D reconstruction method: helical reconstruction |
-Sample preparation
Component | Name: Ebolavirus nucleoprotein RNA complex (biological assembly) Type: COMPLEX / Entity ID: all / Source: RECOMBINANT | ||||||||||||||||||||
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Molecular weight | Value: 0.166 MDa / Experimental value: NO | ||||||||||||||||||||
Source (natural) | Organism: Ebola virus - Mayinga, Zaire, 1976 | ||||||||||||||||||||
Source (recombinant) | Organism: Homo sapiens (human) / Cell: HEK293T | ||||||||||||||||||||
Buffer solution | pH: 7.8 | ||||||||||||||||||||
Buffer component |
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Specimen | Conc.: 0.3 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||
Specimen support | Details: Gatan Solarus / Grid material: COPPER / Grid mesh size: 400 divisions/in. / Grid type: C-flat-1.2/1.3 4C | ||||||||||||||||||||
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 289 K / Details: 3 second blot, 2.5uL |
-Electron microscopy imaging
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS / Details: nanoprobe, parallel beam illumination |
Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
Electron lens | Mode: BRIGHT FIELDBright-field microscopy / Nominal magnification: 105000 X / Calibrated magnification: 47619 X / Nominal defocus max: 4000 nm / Nominal defocus min: 800 nm / Calibrated defocus min: 800 nm / Calibrated defocus max: 4000 nm / Cs: 2.7 mm / C2 aperture diameter: 50 µm / Alignment procedure: COMA FREE |
Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Temperature (max): 100 K / Temperature (min): 77 K / Residual tilt: 0.1 mradians |
Image recording | Average exposure time: 15 sec. / Electron dose: 105 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of grids imaged: 1 / Num. of real images: 2467 Details: frame alignment and dose weighting using motioncor2 |
EM imaging optics | Energyfilter name: GIF Quantum LS |
Image scans | Sampling size: 5 µm / Width: 7676 / Height: 7420 / Movie frames/image: 75 / Used frames/image: 1-75 |
-Processing
Software | Name: PHENIX / Version: 1.13_2998: / Classification: refinement | ||||||||||||||||||||||||||||||||||||||||||||||||||
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EM software |
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Image processing | Details: frame alignment and integration with motioncor2 incl. dose weighting and 2x Fourier cropping | ||||||||||||||||||||||||||||||||||||||||||||||||||
CTF correction | Details: deconvolution in RELION / Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||||||||||||
Helical symmerty | Angular rotation/subunit: -14.73 ° / Axial rise/subunit: 3.01 Å / Axial symmetry: C1 | ||||||||||||||||||||||||||||||||||||||||||||||||||
Particle selection | Num. of particles selected: 232490 | ||||||||||||||||||||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 3.6 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 117552 / Algorithm: FOURIER SPACE / Num. of class averages: 3 / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||||||||||||||||
Atomic model building | Protocol: AB INITIO MODEL / Space: REAL | ||||||||||||||||||||||||||||||||||||||||||||||||||
Refinement | Highest resolution: 3.6 Å |