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- EMDB-8306: CryoEM structure of a beak and feather disease virus-like particl... -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-8306 | |||||||||
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Title | CryoEM structure of a beak and feather disease virus-like particle encapsidating ssDNA | |||||||||
![]() | Beak and feather disease virus-like particle containing ssDNA | |||||||||
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Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 4.5 Å | |||||||||
![]() | Hardy JM / Sarker S / Radjainia M / Raidal SR / Forwood JK / Coulibaly F | |||||||||
![]() | ![]() Title: Structural insights into the assembly and regulation of distinct viral capsid complexes. Authors: Subir Sarker / María C Terrón / Yogesh Khandokar / David Aragão / Joshua M Hardy / Mazdak Radjainia / Manuel Jiménez-Zaragoza / Pedro J de Pablo / Fasséli Coulibaly / Daniel Luque / ...Authors: Subir Sarker / María C Terrón / Yogesh Khandokar / David Aragão / Joshua M Hardy / Mazdak Radjainia / Manuel Jiménez-Zaragoza / Pedro J de Pablo / Fasséli Coulibaly / Daniel Luque / Shane R Raidal / Jade K Forwood / ![]() ![]() Abstract: The assembly and regulation of viral capsid proteins into highly ordered macromolecular complexes is essential for viral replication. Here, we utilize crystal structures of the capsid protein from ...The assembly and regulation of viral capsid proteins into highly ordered macromolecular complexes is essential for viral replication. Here, we utilize crystal structures of the capsid protein from the smallest and simplest known viruses capable of autonomously replicating in animal cells, circoviruses, to establish structural and mechanistic insights into capsid morphogenesis and regulation. The beak and feather disease virus, like many circoviruses, encode only two genes: a capsid protein and a replication initiation protein. The capsid protein forms distinct macromolecular assemblies during replication and here we elucidate these structures at high resolution, showing that these complexes reverse the exposure of the N-terminal arginine rich domain responsible for DNA binding and nuclear localization. We show that assembly of these complexes is regulated by single-stranded DNA (ssDNA), and provide a structural basis of capsid assembly around single-stranded DNA, highlighting novel binding interfaces distinct from the highly positively charged N-terminal ARM domain. | |||||||||
History |
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Structure visualization
Movie |
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 23.1 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 19.6 KB 19.6 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 10.8 KB | Display | ![]() |
Images | ![]() | 202.2 KB | ||
Others | ![]() | 23.2 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 78.4 KB | Display | ![]() |
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Full document | ![]() | 77.5 KB | Display | |
Data in XML | ![]() | 494 B | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
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Links
EMDB pages | ![]() ![]() |
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Map
File | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | Beak and feather disease virus-like particle containing ssDNA | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.02 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Additional map: The difference map produced by subtracting the crystal...
File | emd_8306_additional.map | ||||||||||||
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Annotation | The difference map produced by subtracting the crystal structure of the protein component from the cryoEM map | ||||||||||||
Projections & Slices |
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Density Histograms |
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Sample components
-Entire : Beak and feather disease virus
Entire | Name: ![]() |
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Components |
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-Supramolecule #1: Beak and feather disease virus
Supramolecule | Name: Beak and feather disease virus / type: virus / ID: 1 / Parent: 0 / Macromolecule list: all Details: Recombinant protein complex bound to ssDNA in an icosahedral arrangement NCBI-ID: 77856 / Sci species name: Beak and feather disease virus / Virus type: VIRUS-LIKE PARTICLE / Virus isolate: SPECIES / Virus enveloped: No / Virus empty: No |
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Host (natural) | Organism: ![]() |
Host system | Organism: ![]() ![]() |
Molecular weight | Theoretical: 2.595 MDa |
Virus shell | Shell ID: 1 / Name: Capsid / Diameter: 170.0 Å / T number (triangulation number): 1 |
-Supramolecule #2: 42mer ssDNA
Supramolecule | Name: 42mer ssDNA / type: organelle_or_cellular_component / ID: 2 / Parent: 1 / Macromolecule list: #2 Details: The difference map produced by subtracting the crystal structure of the protein component (PDB: 5J37) from the cryoEM map |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 784 KDa |
-Supramolecule #3: Cap protein
Supramolecule | Name: Cap protein / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #1 / Details: Icosahedral capsid |
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Source (natural) | Organism: ![]() |
Recombinant expression | Organism: ![]() ![]() |
Molecular weight | Theoretical: 1.811 MDa |
-Macromolecule #1: Cap Protein
Macromolecule | Name: Cap Protein / type: protein_or_peptide / ID: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MHHHHHHSSG VDLGTENLYF QSNARRRYAR PYRRRHIRRY RRRRRHFRRR RFSTNRIYTL RLTRQFQFKI NKQTTSVGNL IFNADYITFA LDDFLQAVPN PHTLNFEDYR IKLAKMEMRP TGGHYTVQSD GFGHTAVIQD SRITRFKTTA DQTQDPLAPF DGAKKWFVSR ...String: MHHHHHHSSG VDLGTENLYF QSNARRRYAR PYRRRHIRRY RRRRRHFRRR RFSTNRIYTL RLTRQFQFKI NKQTTSVGNL IFNADYITFA LDDFLQAVPN PHTLNFEDYR IKLAKMEMRP TGGHYTVQSD GFGHTAVIQD SRITRFKTTA DQTQDPLAPF DGAKKWFVSR GFKRLLRPKP QITIEDLTTA NQSAALWLNS ARTGWIPLQG GPNSAGTKVR HYGIAFSFPQ PEQTITYVTK LTLYVQFRQF APNNPST |
-Macromolecule #2: 42mer ssDNA
Macromolecule | Name: 42mer ssDNA / type: dna / ID: 2 / Classification: DNA |
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Source (natural) | Organism: ![]() |
Sequence | String: TTATCCACTT CCAATGTTAT TAAGTGCTGG GATTGTTAGG GG |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Concentration | 3.6 mg/mL | |||||||||
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Buffer | pH: 8 Component:
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Grid | Model: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 300 / Pretreatment - Type: GLOW DISCHARGE | |||||||||
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV / Details: 3 second blot (-1 force), 2 second drain time. |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: FEI FALCON II (4k x 4k) / Detector mode: INTEGRATING / Digitization - Sampling interval: 14.0 µm / Digitization - Frames/image: 1-6 / Number grids imaged: 1 / Number real images: 1153 / Average exposure time: 1.0 sec. / Average electron dose: 2.65 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | C2 aperture diameter: 50.0 µm / Calibrated magnification: 127000 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 3.5 µm / Nominal defocus min: 0.6 µm / Nominal magnification: 75000 |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
-Atomic model buiding 1
Details | Fitting, considering the icosahedral symmetries, was done using UCSF Chimera. |
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Refinement | Space: REAL / Protocol: RIGID BODY FIT / Target criteria: Correlation coefficient |