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- EMDB-70749: Cowpea chlorotic mottle virus in the contracted state -

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Basic information

Entry
Database: EMDB / ID: EMD-70749
TitleCowpea chlorotic mottle virus in the contracted state
Map dataSharpened
Sample
  • Virus: Cowpea chlorotic mottle virus
    • Protein or peptide: Cowpea chlorotic mottle virus capsid
Keywordscowpea chlorotic mottle virus / plant / VIRUS
Biological speciesCowpea chlorotic mottle virus
Methodsingle particle reconstruction / cryo EM / Resolution: 3.2 Å
AuthorsAlexandrescu L / Lander GC
Funding support United States, 3 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)1F31NS136003-01 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM154216 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM143805 United States
CitationJournal: To Be Published
Title: "Mix-it-up": Accessible time-resolved cryo-EM on the millisecond timescale
Authors: Alexandrescu L / Lander GC
History
DepositionMay 20, 2025-
Header (metadata) releaseJun 4, 2025-
Map releaseJun 4, 2025-
UpdateJun 4, 2025-
Current statusJun 4, 2025Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_70749.png

Downloads & links

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Map

FileDownload / File: emd_70749.map.gz / Format: CCP4 / Size: 476.8 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationSharpened
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.94 Å/pix.
x 500 pix.
= 470. Å		0.94 Å/pix.
x 500 pix.
= 470. Å		0.94 Å/pix.
x 500 pix.
= 470. Å

Surface

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Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.94 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.113
Minimum - Maximum-0.41841114 - 0.7072721
Average (Standard dev.)0.0003421614 (±0.04001274)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions500500500
Spacing500500500
CellA=B=C: 470.0 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_70749_msk_1.map
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Additional map: Unsharpened

Fileemd_70749_additional_1.map
AnnotationUnsharpened
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Half map: #2

Fileemd_70749_half_map_1.map
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Half map: #1

Fileemd_70749_half_map_2.map
Projections & Slices
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Sample components

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Entire : Cowpea chlorotic mottle virus

EntireName: Cowpea chlorotic mottle virus
Components
  • Virus: Cowpea chlorotic mottle virus
    • Protein or peptide: Cowpea chlorotic mottle virus capsid

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Supramolecule #1: Cowpea chlorotic mottle virus

SupramoleculeName: Cowpea chlorotic mottle virus / type: virus / ID: 1 / Parent: 0 / Macromolecule list: all / NCBI-ID: 12303 / Sci species name: Cowpea chlorotic mottle virus / Virus type: VIRION / Virus isolate: SPECIES / Virus enveloped: No / Virus empty: No
Host (natural)Organism: Vigna unguiculata subsp. unguiculata (cowpea) / Strain: No. 5
Molecular weightTheoretical: 3.8 MDa
Virus shellShell ID: 1 / Name: Capsid / Diameter: 290.0 Å / T number (triangulation number): 3

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Macromolecule #1: Cowpea chlorotic mottle virus capsid

MacromoleculeName: Cowpea chlorotic mottle virus capsid / type: protein_or_peptide / ID: 1 / Enantiomer: LEVO
Source (natural)Organism: Cowpea chlorotic mottle virus
SequenceString:
MSTVGTGKLT RAQRRAAARK NKRNTRVVQP VIVEPIASGQ GKAIKAWTGY SVSKWTASCA AAEAKVTSAI TISLPNELSS ERNKQLKVGR VLLWLGLLPS VSGTVKSCVT ETQTTAAASF QVALAVADNS KDVVAAMYPE AFKGITLEQL TADLTIYLYS SAALTEGDVI VHLEVEHVRP TFDDSFTPVY

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration11 mg/mL
BufferpH: 4.8
Component:
ConcentrationFormulaName
0.1 MNaOAcSodium acetate
1.0 mMEDTAEthylenediaminetetraacetic acid
GridModel: Homemade / Material: COPPER/RHODIUM / Mesh: 400 / Support film - Material: GOLD / Support film - topology: HOLEY / Support film - Film thickness: 35 / Pretreatment - Type: PLASMA CLEANING / Pretreatment - Time: 7 sec. / Pretreatment - Atmosphere: OTHER / Pretreatment - Pressure: 23.998 kPa
VitrificationCryogen name: ETHANE / Chamber humidity: 69 % / Chamber temperature: 296 K
Details: Vitrification performed at ambient humidity and room temperature using specialized "Mix-it-Up" electrospray device.

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Electron microscopy

MicroscopeFEI TALOS ARCTICA
TemperatureMin: 70.0 K / Max: 77.0 K
Image recordingFilm or detector model: TFS FALCON 4i (4k x 4k) / Digitization - Dimensions - Width: 4096 pixel / Digitization - Dimensions - Height: 4096 pixel / Number real images: 292 / Average exposure time: 4.13 sec. / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 30.0 µm / Calibrated defocus max: 3.1270000000000002 µm / Calibrated defocus min: 0.1 µm / Calibrated magnification: 148936 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 1.4000000000000001 µm / Nominal defocus min: 1.0 µm / Nominal magnification: 150000
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 10990
CTF correctionSoftware - Name: cryoSPARC (ver. v4.6.2) / Type: PHASE FLIPPING ONLY
Startup modelType of model: NONE
Final reconstructionNumber classes used: 1 / Applied symmetry - Point group: I (icosahedral) / Algorithm: FOURIER SPACE / Resolution.type: BY AUTHOR / Resolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. v4.6.2) / Number images used: 5369
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. v4.6.2)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. v4.6.2)
Final 3D classificationNumber classes: 50 / Avg.num./class: 140 / Software - Name: cryoSPARC (ver. v4.6.2)
FSC plot (resolution estimation)

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