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- EMDB-5928: Kinetic and Structural Analysis of Coxsackievirus B3 Receptor Int... -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-5928 | |||||||||
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Title | Kinetic and Structural Analysis of Coxsackievirus B3 Receptor Interactions and Formation of the A-particle | |||||||||
![]() | Reconstruction of CVB3 A-particle transitioned by CAR | |||||||||
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![]() | coxsackievirus b3 / cvb3 / CAR / cryoEM / A-particle | |||||||||
Biological species | ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 9.0 Å | |||||||||
![]() | Organtini LJ / Makhov AM / Conway JF / Hafenstein S / Carson SD | |||||||||
![]() | ![]() Title: Kinetic and structural analysis of coxsackievirus B3 receptor interactions and formation of the A-particle. Authors: Lindsey J Organtini / Alexander M Makhov / James F Conway / Susan Hafenstein / Steven D Carson / ![]() Abstract: The coxsackievirus and adenovirus receptor (CAR) has been identified as the cellular receptor for group B coxsackieviruses, including serotype 3 (CVB3). CAR mediates infection by binding to CVB3 and ...The coxsackievirus and adenovirus receptor (CAR) has been identified as the cellular receptor for group B coxsackieviruses, including serotype 3 (CVB3). CAR mediates infection by binding to CVB3 and catalyzing conformational changes in the virus that result in formation of the altered, noninfectious A-particle. Kinetic analyses show that the apparent first-order rate constant for the inactivation of CVB3 by soluble CAR (sCAR) at physiological temperatures varies nonlinearly with sCAR concentration. Cryo-electron microscopy (cryo-EM) reconstruction of the CVB3-CAR complex resulted in a 9.0-Å resolution map that was interpreted with the four available crystal structures of CAR, providing a consensus footprint for the receptor binding site. The analysis of the cryo-EM structure identifies important virus-receptor interactions that are conserved across picornavirus species. These conserved interactions map to variable antigenic sites or structurally conserved regions, suggesting a combination of evolutionary mechanisms for receptor site preservation. The CAR-catalyzed A-particle structure was solved to a 6.6-Å resolution and shows significant rearrangement of internal features and symmetric interactions with the RNA genome. IMPORTANCE: This report presents new information about receptor use by picornaviruses and highlights the importance of attaining at least an ∼9-Å resolution for the interpretation of cryo-EM ...IMPORTANCE: This report presents new information about receptor use by picornaviruses and highlights the importance of attaining at least an ∼9-Å resolution for the interpretation of cryo-EM complex maps. The analysis of receptor binding elucidates two complementary mechanisms for preservation of the low-affinity (initial) interaction of the receptor and defines the kinetics of receptor-catalyzed conformational change to the A-particle. | |||||||||
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 | ![]() | 65.4 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 9.8 KB 9.8 KB | Display Display | ![]() |
Images | ![]() ![]() | 102.5 KB 6.8 KB | ||
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 | ![]() | 493 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 | Reconstruction of CVB3 A-particle transitioned by CAR | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.25 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
-Entire : Coxsackievirus B3 A-Particle
Entire | Name: Coxsackievirus B3 A-Particle |
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Components |
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-Supramolecule #1000: Coxsackievirus B3 A-Particle
Supramolecule | Name: Coxsackievirus B3 A-Particle / type: sample / ID: 1000 / Details: purified virus and receptor complex in solution / Oligomeric state: icosahedral virus / Number unique components: 1 |
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Molecular weight | Experimental: 7 MDa |
-Supramolecule #1: Human coxsackievirus B3
Supramolecule | Name: Human coxsackievirus B3 / type: virus / ID: 1 / Name.synonym: CVB3 Details: Virus was incubated with excess CAR at 4 degrees C then transitioned to 37 degrees C in order to create the A-particle. NCBI-ID: 12072 / Sci species name: Human coxsackievirus B3 / Sci species strain: CVB3/28 / Database: NCBI / Virus type: VIRION / Virus isolate: STRAIN / Virus enveloped: No / Virus empty: No / Syn species name: CVB3 |
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Host (natural) | Organism: ![]() |
Molecular weight | Experimental: 7 MDa |
Virus shell | Shell ID: 1 / Name: VP1-4 / Diameter: 300 Å / T number (triangulation number): 1 |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Concentration | 0.1 mg/mL |
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Buffer | pH: 6 / Details: 50 mM MES, 100 mM NaCl |
Grid | Details: glow-discharged holey carbon Quantifoil electron microscopy grids |
Vitrification | Cryogen name: ETHANE-PROPANE MIXTURE / Chamber humidity: 95 % / Chamber temperature: 95 K / Instrument: FEI VITROBOT MARK III |
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Electron microscopy
Microscope | FEI TECNAI F20 |
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Alignment procedure | Legacy - Astigmatism: CTFFIND3 |
Date | Aug 1, 2012 |
Image recording | Category: FILM / Film or detector model: KODAK SO-163 FILM / Digitization - Scanner: NIKON SUPER COOLSCAN 9000 / Digitization - Sampling interval: 6.35 µm / Number real images: 48 / Average electron dose: 15 e/Å2 |
Electron beam | Acceleration voltage: 200 kV / Electron source: ![]() |
Electron optics | Calibrated magnification: 50000 / Illumination mode: SPOT SCAN / Imaging mode: BRIGHT FIELD / Cs: 2 mm / Nominal defocus max: 5.2 µm / Nominal defocus min: 2.33 µm / Nominal magnification: 50000 |
Sample stage | Specimen holder model: GATAN LIQUID NITROGEN |
Experimental equipment | ![]() Model: Tecnai F20 / Image courtesy: FEI Company |
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Image processing
Details | Particles were selected using EMAN. |
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CTF correction | Details: AUTO3DEM |
Final reconstruction | Algorithm: OTHER / Resolution.type: BY AUTHOR / Resolution: 9.0 Å / Resolution method: OTHER / Software - Name: EMAN, AUTO3DEM / Number images used: 41939 |