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Open data
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Basic information
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Title | Cryotomogram of Prototype Foamy Virus particles, wild-type Gag | |||||||||
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![]() | capsid / Gag / full-length / CA domain / VIRAL PROTEIN | |||||||||
Biological species | ![]() | |||||||||
Method | electron tomography / cryo EM | |||||||||
![]() | Calcraft T / Nans A / Rosenthal PB | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Integrated cryoEM structure of a spumaretrovirus reveals cross-kingdom evolutionary relationships and the molecular basis for assembly and virus entry. Authors: Thomas Calcraft / Nicole Stanke-Scheffler / Andrea Nans / Dirk Lindemann / Ian A Taylor / Peter B Rosenthal / ![]() ![]() Abstract: Foamy viruses (FVs) are an ancient lineage of retroviruses, with an evolutionary history spanning over 450 million years. Vector systems based on Prototype Foamy Virus (PFV) are promising candidates ...Foamy viruses (FVs) are an ancient lineage of retroviruses, with an evolutionary history spanning over 450 million years. Vector systems based on Prototype Foamy Virus (PFV) are promising candidates for gene and oncolytic therapies. Structural studies of PFV contribute to the understanding of the mechanisms of FV replication, cell entry and infection, and retroviral evolution. Here we combine cryoEM and cryoET to determine high-resolution in situ structures of the PFV icosahedral capsid (CA) and envelope glycoprotein (Env), including its type III transmembrane anchor and membrane-proximal external region (MPER), and show how they are organized in an integrated structure of assembled PFV particles. The atomic models reveal an ancient retroviral capsid architecture and an unexpected relationship between Env and other class 1 fusion proteins of the Mononegavirales. Our results represent the de novo structure determination of an assembled retrovirus particle. | |||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 965.5 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 12.2 KB 12.2 KB | Display Display | ![]() |
Images | ![]() | 220.3 KB | ||
Filedesc metadata | ![]() | 4.5 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 422.4 KB | Display | ![]() |
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Full document | ![]() | 422 KB | Display | |
Data in XML | ![]() | 4.9 KB | Display | |
Data in CIF | ![]() | 5.4 KB | 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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Voxel size | X=Y=Z: 5.52 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
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Sample components
-Entire : Eastern chimpanzee simian foamy virus
Entire | Name: ![]() |
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Components |
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-Supramolecule #1: Eastern chimpanzee simian foamy virus
Supramolecule | Name: Eastern chimpanzee simian foamy virus / type: virus / ID: 1 / Parent: 0 / Macromolecule list: #1 / NCBI-ID: 2170195 / Sci species name: Eastern chimpanzee simian foamy virus / Virus type: VIRION / Virus isolate: STRAIN / Virus enveloped: Yes / Virus empty: No |
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Virus shell | Shell ID: 1 / T number (triangulation number): 13 |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | electron tomography |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.4 |
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Grid | Model: Quantifoil R2/2 / Material: COPPER / Support film - Material: CARBON / Support film - topology: HOLEY ARRAY |
Vitrification | Cryogen name: ETHANE / Instrument: FEI VITROBOT MARK III |
Sectioning | Other: NO SECTIONING |
Fiducial marker | Manufacturer: BBI Solutions / Diameter: 10 nm |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Specialist optics | Energy filter - Name: GIF Quantum LS / Energy filter - Slit width: 20 eV |
Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Digitization - Dimensions - Width: 3838 pixel / Digitization - Dimensions - Height: 3710 pixel / Average electron dose: 2.62 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 4.5 µm / Nominal defocus min: 2.0 µm |
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
Final reconstruction | Algorithm: BACK PROJECTION Software:
Number images used: 41 |
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