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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-30507 | |||||||||
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Title | Protrusion structure of Omono River virus | |||||||||
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![]() | Protrusion / Pentamer / five-fold vertex / VIRAL PROTEIN | |||||||||
Function / homology | Double-stranded RNA binding motif / Double-stranded RNA binding motif / Double stranded RNA-binding domain (dsRBD) profile. / Double-stranded RNA-binding domain / RNA binding / Main capsid protein![]() | |||||||||
Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 4.1 Å | |||||||||
![]() | Shao Q / Jia X | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Cryo-EM reveals a previously unrecognized structural protein of a dsRNA virus implicated in its extracellular transmission. Authors: Qianqian Shao / Xudong Jia / Yuanzhu Gao / Zhe Liu / Huan Zhang / Qiqi Tan / Xin Zhang / Huiqiong Zhou / Yinyin Li / De Wu / Qinfen Zhang / ![]() Abstract: Mosquito viruses cause unpredictable outbreaks of disease. Recently, several unassigned viruses isolated from mosquitoes, including the Omono River virus (OmRV), were identified as totivirus-like ...Mosquito viruses cause unpredictable outbreaks of disease. Recently, several unassigned viruses isolated from mosquitoes, including the Omono River virus (OmRV), were identified as totivirus-like viruses, with features similar to those of the Totiviridae family. Most reported members of this family infect fungi or protozoans and lack an extracellular life cycle stage. Here, we identified a new strain of OmRV and determined high-resolution structures for this virus using single-particle cryo-electron microscopy. The structures feature an unexpected protrusion at the five-fold vertex of the capsid. Disassociation of the protrusion could result in several conformational changes in the major capsid. All these structures, together with some biological results, suggest the protrusions' associations with the extracellular transmission of OmRV. | |||||||||
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 | ![]() | 1.1 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 13.3 KB 13.3 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 5.8 KB | Display | ![]() |
Images | ![]() | 69.1 KB | ||
Filedesc metadata | ![]() | 5.4 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7cz6MC ![]() 7d0kC ![]() 7d0lC M: atomic model generated by this map C: citing same article ( |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
File | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Voxel size | X=Y=Z: 1.09 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 : Omono River virus
Entire | Name: ![]() |
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Components |
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-Supramolecule #1: Omono River virus
Supramolecule | Name: Omono River virus / type: virus / ID: 1 / Parent: 0 / Macromolecule list: all Details: Protrusion structure located upon the five-fold vertex of the major capsid. NCBI-ID: 753758 / Sci species name: Omono River virus / Sci species strain: LZ / Virus type: VIRION / Virus isolate: STRAIN / Virus enveloped: No / Virus empty: No |
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Host (natural) | Organism: ![]() |
Virus shell | Shell ID: 1 / Name: Major capsid / Diameter: 450.0 Å / T number (triangulation number): 1 |
-Macromolecule #1: Capsid protein
Macromolecule | Name: Capsid protein / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 12.91753 KDa |
Sequence | String: IDCDSSVFGN NFNITTSPQT LTMSGPLAPG KYQTTLTVQA LIGGTGVVVG TVTFAGKTVA YQVFDDSFAS FDLGTVTVSA STTPSVIWT GSTGATLTMA VNIICKPITP TSVAISGQPI WTTPYAP |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.4 Component:
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Grid | Model: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 300 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE | |||||||||||||||
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: FEI FALCON III (4k x 4k) / Detector mode: COUNTING / Average electron dose: 39.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.5 µm / Nominal defocus min: 1.0 µm / Nominal magnification: 75000 |
Sample stage | Cooling holder cryogen: NITROGEN |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
-Atomic model buiding 1
Refinement | Space: REAL / Protocol: AB INITIO MODEL |
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Output model | ![]() PDB-7cz6: |