+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-0273 | |||||||||
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Title | phosphorylated F97L Hepatitis B core protein capsid | |||||||||
Map data | post processed with relion (filtered, mtf corrected, B-factor sharpened) followed by local density scaling with locscale | |||||||||
Sample |
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Keywords | Hapatitis B core protein Hbc Hbcag / VIRUS LIKE PARTICLE premature envelopment mutant phosphorylated F97L / VIRUS LIKE PARTICLE | |||||||||
Function / homology | Function and homology information virus-mediated perturbation of host defense response => GO:0019049 / microtubule-dependent intracellular transport of viral material towards nucleus / T=4 icosahedral viral capsid / : / viral penetration into host nucleus / host cell / host cell cytoplasm / symbiont entry into host cell / structural molecule activity / DNA binding ...virus-mediated perturbation of host defense response => GO:0019049 / microtubule-dependent intracellular transport of viral material towards nucleus / T=4 icosahedral viral capsid / : / viral penetration into host nucleus / host cell / host cell cytoplasm / symbiont entry into host cell / structural molecule activity / DNA binding / RNA binding / extracellular region Similarity search - Function | |||||||||
Biological species | Hepatitis B virus | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 2.8 Å | |||||||||
Authors | Bottcher B / Nassal M | |||||||||
Funding support | Germany, 1 items
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Citation | Journal: J Mol Biol / Year: 2018 Title: Structure of Mutant Hepatitis B Core Protein Capsids with Premature Secretion Phenotype. Authors: Bettina Böttcher / Michael Nassal / Abstract: Hepatitis B virus is a major human pathogen that consists of a viral genome surrounded by an icosahedrally ordered core protein and a polymorphic, lipidic envelope that is densely packed with surface ...Hepatitis B virus is a major human pathogen that consists of a viral genome surrounded by an icosahedrally ordered core protein and a polymorphic, lipidic envelope that is densely packed with surface proteins. A point mutation in the core protein in which a phenylalanine at position 97 is exchanged for a smaller leucine leads to premature envelopment of the capsid before the genome maturation is fully completed. We have used electron cryo-microscopy and image processing to investigate how the point mutation affects the structure of the capsid at 2.6- to 2.8 Å-resolution. We found that in the mutant the smaller side chain at position 97 is displaced, increasing the size of an adjacent pocket in the center of the spikes of the capsid. In the mutant, this pocket is filled with an unknown density. Phosphorylation of serine residues in the unresolved C-terminal domain of the mutant leaves the structure of the ordered capsid largely unchanged. However, we were able to resolve several previously unresolved residues downstream of proline 144 that precede the phosphorylation-sites. These residues pack against the neighboring subunits and increase the inter-dimer contact suggesting that the C-termini play an important role in capsid stabilization and provide a much larger interaction interface than previously observed. | |||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | EM map: SurfViewMolmilJmol/JSmol |
Supplemental images |
-Downloads & links
-EMDB archive
Map data | emd_0273.map.gz | 25.5 MB | EMDB map data format | |
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Header (meta data) | emd-0273-v30.xml emd-0273.xml | 19.1 KB 19.1 KB | Display Display | EMDB header |
FSC (resolution estimation) | emd_0273_fsc.xml | 18 KB | Display | FSC data file |
Images | emd_0273.png | 504.5 KB | ||
Masks | emd_0273_msk_1.map | 512 MB | Mask map | |
Filedesc metadata | emd-0273.cif.gz | 6.5 KB | ||
Others | emd_0273_half_map_1.map.gz emd_0273_half_map_2.map.gz | 410.6 MB 410.5 MB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-0273 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-0273 | HTTPS FTP |
-Related structure data
Related structure data | 6hu7MC 0271C 0272C 6htxC 6hu4C M: atomic model generated by this map C: citing same article (ref.) |
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Similar structure data |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_0273.map.gz / Format: CCP4 / Size: 512 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | post processed with relion (filtered, mtf corrected, B-factor sharpened) followed by local density scaling with locscale | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.056 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Mask #1
File | emd_0273_msk_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #2
File | emd_0273_half_map_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #1
File | emd_0273_half_map_2.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Sample components
-Entire : Hepatitis B virus
Entire | Name: Hepatitis B virus |
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Components |
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-Supramolecule #1: Hepatitis B virus
Supramolecule | Name: Hepatitis B virus / type: virus / ID: 1 / Parent: 0 / Macromolecule list: all / NCBI-ID: 10407 / Sci species name: Hepatitis B virus / Sci species strain: ayw / Virus type: VIRUS-LIKE PARTICLE / Virus isolate: STRAIN / Virus enveloped: No / Virus empty: Yes |
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Host (natural) | Organism: Homo sapiens (human) |
Molecular weight | Theoretical: 4.8 MDa |
Virus shell | Shell ID: 1 / Name: F97L Hbc phos / Diameter: 340.0 Å / T number (triangulation number): 4 |
-Macromolecule #1: Capsid protein
Macromolecule | Name: Capsid protein / type: protein_or_peptide / ID: 1 / Number of copies: 7 / Enantiomer: LEVO |
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Source (natural) | Organism: Hepatitis B virus |
Molecular weight | Theoretical: 21.112199 KDa |
Recombinant expression | Organism: Escherichia coli (E. coli) |
Sequence | String: MDIDPYKEFG ATVELLSFLP SDFFPSVRDL LDTASALYRE ALESPEHCSP HHTALRQAIL CWGELMTLAT WVGVNLEDPA SRDLVVSYV NTNMGLKLRQ LLWFHISCLT FGRETVIEYL VSFGVWIRTP PAYRPPNAPI LSTLPETTVV RRRGRSPRRR T PSPRRRRS QSPRRRRSQS RESQC UniProtKB: Capsid protein |
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Concentration | 5 mg/mL | |||||||||
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Buffer | pH: 7.7 Component:
Details: 25 mM Tris pH 7.7, 150 mM NaCl | |||||||||
Grid | Model: Quantifoil, UltrAuFoil, R1.2/1.3 / Material: GOLD / Mesh: 300 / Support film - topology: HOLEY ARRAY / Support film - Film thickness: 50 / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 60 sec. / Pretreatment - Atmosphere: AIR | |||||||||
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 278 K / Instrument: FEI VITROBOT MARK IV Details: Samples were vitrified with an FEI Vitrobot IV, which was operated at 100% humidity at 4C. 2.5-3.5 ul of sample were applied to grids (Quantifoil UltrAuFoil R1.3/1.2 300 mesh gold grids ) ...Details: Samples were vitrified with an FEI Vitrobot IV, which was operated at 100% humidity at 4C. 2.5-3.5 ul of sample were applied to grids (Quantifoil UltrAuFoil R1.3/1.2 300 mesh gold grids ) that were glow discharged in air for 1-2 min. The sample was incubated for 30 s before blotting for 3 s with a blot force between 0 and 5.. | |||||||||
Details | sample is purified from e.coli via sucrose density gradient. sucrose is removed via buffer exchange on a concentrator |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Specialist optics | Spherical aberration corrector: cs-corrected |
Image recording | Film or detector model: FEI FALCON III (4k x 4k) / Detector mode: INTEGRATING / Digitization - Frames/image: 1-28 / Number grids imaged: 1 / Number real images: 2341 / Average electron dose: 40.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | C2 aperture diameter: 70.0 µm / Calibrated defocus max: 5.0 µm / Calibrated defocus min: 0.6 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 0.0 mm / 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 |