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- PDB-8gsc: Echovirus3 A-particle in complex with 6D10 Fab -

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Basic information

Entry
Database: PDB / ID: 8gsc
TitleEchovirus3 A-particle in complex with 6D10 Fab
Components
  • Heavy chain of 6D10
  • Light chain of 6D10
  • VP1
  • VP2
  • VP3
KeywordsVIRUS/IMMUNE SYSTEM / E3 Full particle / Echovirus3 Full particle / antibody / 6D10 / VIRUS-IMMUNE SYSTEM complex
Function / homology
Function and homology information


symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of RIG-I activity / picornain 2A / symbiont-mediated suppression of host mRNA export from nucleus / symbiont genome entry into host cell via pore formation in plasma membrane / picornain 3C / T=pseudo3 icosahedral viral capsid / host cell cytoplasmic vesicle membrane / viral capsid / host cell / nucleoside-triphosphate phosphatase ...symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of RIG-I activity / picornain 2A / symbiont-mediated suppression of host mRNA export from nucleus / symbiont genome entry into host cell via pore formation in plasma membrane / picornain 3C / T=pseudo3 icosahedral viral capsid / host cell cytoplasmic vesicle membrane / viral capsid / host cell / nucleoside-triphosphate phosphatase / channel activity / monoatomic ion transmembrane transport / DNA replication / RNA helicase activity / endocytosis involved in viral entry into host cell / symbiont-mediated activation of host autophagy / RNA-directed RNA polymerase / cysteine-type endopeptidase activity / viral RNA genome replication / RNA-directed RNA polymerase activity / DNA-templated transcription / symbiont entry into host cell / virion attachment to host cell / host cell nucleus / structural molecule activity / ATP hydrolysis activity / proteolysis / RNA binding / zinc ion binding / ATP binding / membrane
Similarity search - Function
Picornavirus coat protein VP4 superfamily / Jelly Rolls - #20 / Poliovirus 3A protein-like / Poliovirus 3A protein like / Picornavirus 2B protein / Poliovirus core protein 3a, soluble domain / Picornavirus 2B protein / Peptidase C3, picornavirus core protein 2A / Picornavirus core protein 2A / Picornavirus coat protein VP4 ...Picornavirus coat protein VP4 superfamily / Jelly Rolls - #20 / Poliovirus 3A protein-like / Poliovirus 3A protein like / Picornavirus 2B protein / Poliovirus core protein 3a, soluble domain / Picornavirus 2B protein / Peptidase C3, picornavirus core protein 2A / Picornavirus core protein 2A / Picornavirus coat protein VP4 / Picornavirus coat protein (VP4) / Peptidase C3A/C3B, picornaviral / 3C cysteine protease (picornain 3C) / Picornavirales 3C/3C-like protease domain / Picornavirales 3C/3C-like protease domain profile. / Picornavirus capsid / picornavirus capsid protein / Helicase, superfamily 3, single-stranded RNA virus / Superfamily 3 helicase of positive ssRNA viruses domain profile. / Helicase, superfamily 3, single-stranded DNA/RNA virus / RNA helicase / Picornavirus/Calicivirus coat protein / Viral coat protein subunit / RNA-directed RNA polymerase, C-terminal domain / Viral RNA-dependent RNA polymerase / Reverse transcriptase/Diguanylate cyclase domain / Jelly Rolls / RNA-directed RNA polymerase, catalytic domain / RdRp of positive ssRNA viruses catalytic domain profile. / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / Peptidase S1, PA clan, chymotrypsin-like fold / Immunoglobulins / Peptidase S1, PA clan / DNA/RNA polymerase superfamily / Immunoglobulin-like / Sandwich / P-loop containing nucleoside triphosphate hydrolase / Mainly Beta
Similarity search - Domain/homology
Genome polyprotein / Genome polyprotein / Genome polyprotein
Similarity search - Component
Biological speciesMus musculus (house mouse)
Echovirus E3
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.4 Å
AuthorsWang, X. / Fu, W.
Funding support1items
OrganizationGrant numberCountry
Not funded
CitationJournal: Viruses / Year: 2022
Title: Structural Basis for the Immunogenicity of the C-Terminus of VP1 of Echovirus 3 Revealed by the Binding of a Neutralizing Antibody.
Authors: Shuai Qi / Wangjun Fu / Jinyan Fan / Li Zhang / Binyang Zheng / Kang Wang / Xiangxi Wang / Ling Zhu / Xinjian Li / Yuxia Zhang /
Abstract: Echovirus 3 (E3), a serotype of human enterovirus B (HEV-B), causes severe diseases in infants. Here, we determined the structures of E3 with a monoclonal antibody (MAb) 6D10 by cryo-EM to ...Echovirus 3 (E3), a serotype of human enterovirus B (HEV-B), causes severe diseases in infants. Here, we determined the structures of E3 with a monoclonal antibody (MAb) 6D10 by cryo-EM to comprehensively understand the specificities and the immunological characteristic of this serotype. The solved cryo-EM structures of the F-, A-, and E-particles of E3 bound with 6D10 revealed the structural features of the virus-antibody interface. Importantly, the structures of E-particles bound with 6D10 revealed for the first time the nature of the C-terminus of VP1 for HEV-Bs at the structural level. The highly immunogenic nature of this region in the E-particles provides new strategies for vaccine development for HEV-Bs.
History
DepositionSep 6, 2022Deposition site: PDBJ / Processing site: RCSB
Revision 1.0Dec 14, 2022Provider: repository / Type: Initial release
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Revision 1.1Oct 30, 2024Group: Data collection / Structure summary
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / em_admin / pdbx_entry_details / pdbx_modification_feature
Item: _em_admin.last_update
Revision 1.2May 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
1: VP1
2: VP2
3: VP3
H: Heavy chain of 6D10
L: Light chain of 6D10


Theoretical massNumber of molelcules
Total (without water)106,1435
Polymers106,1435
Non-polymers00
Water00
1
1: VP1
2: VP2
3: VP3
H: Heavy chain of 6D10
L: Light chain of 6D10
x 60


Theoretical massNumber of molelcules
Total (without water)6,368,599300
Polymers6,368,599300
Non-polymers00
Water0
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
point symmetry operation59
2


  • Idetical with deposited unit
  • icosahedral asymmetric unit
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
3
1: VP1
2: VP2
3: VP3
H: Heavy chain of 6D10
L: Light chain of 6D10
x 5


  • icosahedral pentamer
  • 531 kDa, 25 polymers
Theoretical massNumber of molelcules
Total (without water)530,71725
Polymers530,71725
Non-polymers00
Water0
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
point symmetry operation4
4
1: VP1
2: VP2
3: VP3
H: Heavy chain of 6D10
L: Light chain of 6D10
x 6


  • icosahedral 23 hexamer
  • 637 kDa, 30 polymers
Theoretical massNumber of molelcules
Total (without water)636,86030
Polymers636,86030
Non-polymers00
Water0
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
point symmetry operation5
5


  • Idetical with deposited unit in distinct coordinate
  • icosahedral asymmetric unit, std point frame
TypeNameSymmetry operationNumber
transform to point frame1
SymmetryPoint symmetry: (Schoenflies symbol: I (icosahedral))

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Components

#1: Protein VP1


Mass: 26940.322 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Echovirus E3 / References: UniProt: A0A060BFD5
#2: Protein VP2


Mass: 27716.184 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Echovirus E3 / References: UniProt: A0A6M4MJE3
#3: Protein VP3


Mass: 25896.449 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Echovirus E3 / References: UniProt: A0A0K0LDT3
#4: Protein Heavy chain of 6D10


Mass: 12938.200 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Production host: Mus musculus (house mouse)
#5: Antibody Light chain of 6D10


Mass: 12652.158 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Production host: Mus musculus (house mouse)
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

Component
IDNameTypeEntity IDParent-IDSource
1Echovirus3 A-particle in complex with 6D10 FabCOMPLEXall0MULTIPLE SOURCES
2Echovirus3 A-particleVIRUS#1-#31NATURAL
36D10 FabCOMPLEX#4-#51RECOMBINANT
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
12Echovirus E347516
23Mus musculus (house mouse)10090
Source (recombinant)Organism: Mus musculus (house mouse)
Details of virusEmpty: NO / Enveloped: YES / Isolate: OTHER / Type: VIRION
Buffer solutionpH: 7.4
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: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: DARK FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 1200 nm
Image recordingElectron dose: 30 e/Å2 / Film or detector model: GATAN K2 QUANTUM (4k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.19.2_4158: / Classification: refinement
EM softwareName: PHENIX / Category: model refinement
CTF correctionType: NONE
3D reconstructionResolution: 3.4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 55687 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0037659
ELECTRON MICROSCOPYf_angle_d0.52910441
ELECTRON MICROSCOPYf_dihedral_angle_d4.4611031
ELECTRON MICROSCOPYf_chiral_restr0.0451136
ELECTRON MICROSCOPYf_plane_restr0.0051347

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