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- PDB-9dqx: Structure of western equine encephalitis virus CBA87 VLP -

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Basic information

Entry
Database: PDB / ID: 9dqx
TitleStructure of western equine encephalitis virus CBA87 VLP
Components
  • (Structural polyprotein) x 2
  • Capsid protein
KeywordsVIRUS LIKE PARTICLE / western equine encephalitis virus / WEEV / virus like particles
Function / homology
Function and homology information


togavirin / T=4 icosahedral viral capsid / symbiont-mediated suppression of host toll-like receptor signaling pathway / host cell cytoplasm / symbiont-mediated suppression of host gene expression / symbiont entry into host cell / serine-type endopeptidase activity / fusion of virus membrane with host endosome membrane / virion attachment to host cell / host cell nucleus ...togavirin / T=4 icosahedral viral capsid / symbiont-mediated suppression of host toll-like receptor signaling pathway / host cell cytoplasm / symbiont-mediated suppression of host gene expression / symbiont entry into host cell / serine-type endopeptidase activity / fusion of virus membrane with host endosome membrane / virion attachment to host cell / host cell nucleus / host cell plasma membrane / virion membrane / structural molecule activity / proteolysis / RNA binding / membrane
Similarity search - Function
Alphavirus E2 glycoprotein, domain B / Peptidase S3, togavirin / Alphavirus E2 glycoprotein / Alphavirus E3 spike glycoprotein / Alphavirus E1 glycoprotein / Alphavirus E2 glycoprotein, domain A / Alphavirus E2 glycoprotein, domain C / Alphavirus E2 glycoprotein / Alphavirus core protein / Alphavirus E3 glycoprotein ...Alphavirus E2 glycoprotein, domain B / Peptidase S3, togavirin / Alphavirus E2 glycoprotein / Alphavirus E3 spike glycoprotein / Alphavirus E1 glycoprotein / Alphavirus E2 glycoprotein, domain A / Alphavirus E2 glycoprotein, domain C / Alphavirus E2 glycoprotein / Alphavirus core protein / Alphavirus E3 glycoprotein / Alphavirus E1 glycoprotein / Alphavirus core protein (CP) domain profile. / Flavivirus/Alphavirus glycoprotein, immunoglobulin-like domain superfamily / Flavivirus glycoprotein, central and dimerisation domain superfamily / Flaviviral glycoprotein E, dimerisation domain / Immunoglobulin E-set / Peptidase S1, PA clan, chymotrypsin-like fold / Peptidase S1, PA clan
Similarity search - Domain/homology
Structural polyprotein / Structural polyprotein
Similarity search - Component
Biological speciesWestern equine encephalitis virus
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.4 Å
AuthorsAbraham, J. / Fan, X. / Li, W.
Funding support United States, 2items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID) United States
Howard Hughes Medical Institute (HHMI) United States
CitationJournal: To Be Published
Title: Structure of western equine encephalitis virus CBA87 VLP
Authors: Abraham, J. / Fan, X. / Li, W.
History
DepositionSep 24, 2024Deposition site: RCSB / Processing site: RCSB
Revision 1.0Mar 26, 2025Provider: repository / Type: Initial release
Revision 1.0Mar 26, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Mar 26, 2025Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Mar 26, 2025Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Mar 26, 2025Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Mar 26, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Mar 26, 2025Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.1May 28, 2025Group: Data collection / Category: em_admin / em_software / Item: _em_admin.last_update / _em_software.name
Revision 1.1May 28, 2025Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Data processing / Experimental summary / Data content type: EM metadata / EM metadata / Category: em_admin / em_software / Data content type: EM metadata / EM metadata / Item: _em_admin.last_update / _em_software.name

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
J: Structural polyprotein
K: Structural polyprotein
L: Capsid protein
D: Structural polyprotein
G: Structural polyprotein
A: Structural polyprotein
E: Structural polyprotein
H: Structural polyprotein
B: Structural polyprotein
F: Capsid protein
I: Capsid protein
C: Capsid protein
hetero molecules


Theoretical massNumber of molelcules
Total (without water)443,73624
Polymers441,08112
Non-polymers2,65412
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

#1: Protein
Structural polyprotein / p130


Mass: 47031.363 Da / Num. of mol.: 4 / Fragment: UNP residues 798-1235
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Western equine encephalitis virus / Production host: Homo sapiens (human) / References: UniProt: Q1W679
#2: Protein
Structural polyprotein / p130


Mass: 45289.504 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Western equine encephalitis virus / Production host: Homo sapiens (human) / References: UniProt: Q1W679
#3: Protein
Capsid protein / Coat protein / C


Mass: 17949.436 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Western equine encephalitis virus / Production host: Homo sapiens (human) / References: UniProt: P13897, togavirin
#4: Sugar
ChemComp-NAG / 2-acetamido-2-deoxy-beta-D-glucopyranose / N-acetyl-beta-D-glucosamine / 2-acetamido-2-deoxy-beta-D-glucose / 2-acetamido-2-deoxy-D-glucose / 2-acetamido-2-deoxy-glucose / N-ACETYL-D-GLUCOSAMINE


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 12
Source method: isolated from a genetically manipulated source
Formula: C8H15NO6 / Feature type: SUBJECT OF INVESTIGATION
IdentifierTypeProgram
DGlcpNAcbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-b-D-glucopyranosamineCOMMON NAMEGMML 1.0
b-D-GlcpNAcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcNAcSNFG CARBOHYDRATE SYMBOLGMML 1.0
Has ligand of interestY
Has protein modificationY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Western equine encephalitis virus / Type: VIRUS / Entity ID: #3 / Source: RECOMBINANT
Source (natural)Organism: Western equine encephalitis virus / Strain: CBA87
Source (recombinant)Organism: Homo sapiens (human)
Details of virusEmpty: YES / Enveloped: YES / Isolate: STRAIN / Type: VIRUS-LIKE PARTICLE
Buffer solutionpH: 7
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 1800 nm / Nominal defocus min: 600 nm
Image recordingElectron dose: 0.93 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM softwareName: PHENIX / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 31430 / Symmetry type: POINT
RefinementHighest resolution: 3.4 Å
Stereochemistry target values: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS)
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00431692
ELECTRON MICROSCOPYf_angle_d0.83543141
ELECTRON MICROSCOPYf_dihedral_angle_d5.7794311
ELECTRON MICROSCOPYf_chiral_restr0.0554873
ELECTRON MICROSCOPYf_plane_restr0.0075520

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