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Yorodumi- EMDB-7513: Subtomogram average of mature CHIKV virion budded from human cells -
+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-7513 | |||||||||
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Title | Subtomogram average of mature CHIKV virion budded from human cells | |||||||||
Map data | Mature CHIKV virion budded from human cells | |||||||||
Sample |
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Biological species | Chikungunya virus | |||||||||
Method | subtomogram averaging / cryo EM / Resolution: 34.0 Å | |||||||||
Authors | Galaz-Montoya JG / Jin J / Sherman MB | |||||||||
Citation | Journal: Cell Host Microbe / Year: 2018 Title: Neutralizing Antibodies Inhibit Chikungunya Virus Budding at the Plasma Membrane. Authors: Jing Jin / Jesús G Galaz-Montoya / Michael B Sherman / Stella Y Sun / Cynthia S Goldsmith / Eileen T O'Toole / Larry Ackerman / Lars-Anders Carlson / Scott C Weaver / Wah Chiu / Graham Simmons / Abstract: Neutralizing antibodies (NAbs) are traditionally thought to inhibit virus infection by preventing virion entry into target cells. In addition, antibodies can engage Fc receptors (FcRs) on immune ...Neutralizing antibodies (NAbs) are traditionally thought to inhibit virus infection by preventing virion entry into target cells. In addition, antibodies can engage Fc receptors (FcRs) on immune cells to activate antiviral responses. We describe a mechanism by which NAbs inhibit chikungunya virus (CHIKV), the most common alphavirus infecting humans, by preventing virus budding from infected human cells and activating IgG-specific Fcγ receptors. NAbs bind to CHIKV glycoproteins on the infected cell surface and induce glycoprotein coalescence, preventing budding of nascent virions and leaving structurally heterogeneous nucleocapsids arrested in the cytosol. Furthermore, NAbs induce clustering of CHIKV replication spherules at sites of budding blockage. Functionally, these densely packed glycoprotein-NAb complexes on infected cells activate Fcγ receptors, inducing a strong, antibody-dependent, cell-mediated cytotoxicity response from immune effector cells. Our findings describe a triply functional antiviral pathway for NAbs that might be broadly applicable across virus-host systems, suggesting avenues for therapeutic innovation through antibody design. | |||||||||
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_7513.map.gz | 883.9 KB | EMDB map data format | |
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Header (meta data) | emd-7513-v30.xml emd-7513.xml | 10 KB 10 KB | Display Display | EMDB header |
FSC (resolution estimation) | emd_7513_fsc.xml | 6.4 KB | Display | FSC data file |
Images | emd_7513.png | 175.4 KB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-7513 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-7513 | HTTPS FTP |
-Related structure data
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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-Map
File | Download / File: emd_7513.map.gz / Format: CCP4 / Size: 22.2 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | Mature CHIKV virion budded from human cells | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 7.16 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Sample components
-Entire : Chikungunya virus
Entire | Name: Chikungunya virus |
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Components |
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-Supramolecule #1: Chikungunya virus
Supramolecule | Name: Chikungunya virus / type: virus / ID: 1 / Parent: 0 / NCBI-ID: 37124 / Sci species name: Chikungunya virus / Sci species strain: vaccine strain 181/clone 25 / Virus type: VIRION / Virus isolate: STRAIN / Virus enveloped: Yes / Virus empty: No |
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Host (natural) | Organism: Homo sapiens (human) / Strain: vaccine strain 181/clone 25 |
Virus shell | Shell ID: 1 / Diameter: 698.0 Å / T number (triangulation number): 4 |
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | subtomogram averaging |
Aggregation state | cell |
-Sample preparation
Buffer | pH: 7 |
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Vitrification | Cryogen name: ETHANE |
Details | CHIKV vaccine strain 181/clone 25 infected U2OS cells. |
-Electron microscopy
Microscope | JEOL 2200FS |
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Electron beam | Acceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Illumination mode: OTHER / Imaging mode: BRIGHT FIELDBright-field microscopy |
Specialist optics | Energy filter - Name: In-column Omega Filter / Energy filter - Lower energy threshold: 0 eV / Energy filter - Upper energy threshold: 20 eV |
Image recording | Film or detector model: DIRECT ELECTRON DE-20 (5k x 3k) / Average exposure time: 0.6 sec. / Average electron dose: 1.0 e/Å2 |