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- PDB-6lbo: Cryo-EM structure of echovirus 11 empty particle at pH 7.4 -

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Basic information

Entry
Database: PDB / ID: 6lbo
TitleCryo-EM structure of echovirus 11 empty particle at pH 7.4
Components
  • Capsid protein VP1
  • Capsid protein VP2
  • Capsid protein VP3
KeywordsVIRUS
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 / cytoplasmic vesicle membrane / endocytosis involved in viral entry into host cell / symbiont-mediated suppression of host gene expression ...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 / cytoplasmic vesicle membrane / endocytosis involved in viral entry into host cell / symbiont-mediated suppression of host gene expression / nucleoside-triphosphate phosphatase / channel activity / viral capsid / monoatomic ion transmembrane transport / host cell cytoplasm / DNA replication / RNA helicase activity / induction by virus of host autophagy / symbiont entry into host cell / RNA-directed RNA polymerase / viral RNA genome replication / cysteine-type endopeptidase activity / RNA-dependent RNA polymerase activity / virus-mediated perturbation of host defense response / DNA-templated transcription / host cell nucleus / virion attachment to host cell / structural molecule activity / ATP hydrolysis activity / proteolysis / RNA binding / ATP binding / metal ion binding / cytoplasm
Similarity search - Function
Picornavirus coat protein VP4 superfamily / 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) ...Picornavirus coat protein VP4 superfamily / 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 / 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 / Peptidase S1, PA clan / DNA/RNA polymerase superfamily / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
Genome polyprotein / Genome polyprotein / Genome polyprotein
Similarity search - Component
Biological speciesEchovirus E11
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.18 Å
AuthorsLiu, S. / Gao, F.G.
CitationJournal: Chin.Sci.Bull. / Year: 2020
Title: Molecular and structural basis of Echovirus 11 infection by using the dual-receptor system of CD55 and FcRn.
Authors: Niu, S. / Liu, C. / Liu, C. / Liu, S. / Song, Y. / Zhang, Y. / Tian, W. / Zhao, X. / Wang, P. / Gao, F.G.
History
DepositionNov 14, 2019Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Oct 7, 2020Provider: repository / Type: Initial release
Revision 1.1Mar 27, 2024Group: Data collection / Database references / Derived calculations
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_struct_oper_list
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _pdbx_struct_oper_list.name / _pdbx_struct_oper_list.symmetry_operation / _pdbx_struct_oper_list.type

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Structure visualization

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  • Biological unit as complete icosahedral assembly
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  • Biological unit as icosahedral pentamer
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  • Biological unit as icosahedral 23 hexamer
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  • Deposited structure unit
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  • Simplified surface model + fitted atomic model
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  • Superimposition on EM map
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Structure viewerMolecule:
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Assembly

Deposited unit
A: Capsid protein VP1
B: Capsid protein VP2
C: Capsid protein VP3


Theoretical massNumber of molelcules
Total (without water)78,7093
Polymers78,7093
Non-polymers00
Water00
1
A: Capsid protein VP1
B: Capsid protein VP2
C: Capsid protein VP3
x 60


Theoretical massNumber of molelcules
Total (without water)4,722,544180
Polymers4,722,544180
Non-polymers00
Water0
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
point symmetry operation59
Buried area11650 Å2
ΔGint-71 kcal/mol
Surface area31210 Å2
2


  • Idetical with deposited unit
  • icosahedral asymmetric unit
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
3
A: Capsid protein VP1
B: Capsid protein VP2
C: Capsid protein VP3
x 5


  • icosahedral pentamer
  • 394 kDa, 15 polymers
Theoretical massNumber of molelcules
Total (without water)393,54515
Polymers393,54515
Non-polymers00
Water0
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
point symmetry operation4
4
A: Capsid protein VP1
B: Capsid protein VP2
C: Capsid protein VP3
x 6


  • icosahedral 23 hexamer
  • 472 kDa, 18 polymers
Theoretical massNumber of molelcules
Total (without water)472,25418
Polymers472,25418
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 Capsid protein VP1


Mass: 26048.557 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Echovirus E11 / References: UniProt: Q2LJ73*PLUS
#2: Protein Capsid protein VP2


Mass: 27367.783 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Echovirus E11 / References: UniProt: A0A0R5YS56*PLUS
#3: Protein Capsid protein VP3


Mass: 25292.730 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Echovirus E11 / References: UniProt: A8ILJ7*PLUS
Sequence detailsTHE VIRUS WAS ISOLATED FROM CHINA, AND THE GENEBANK: MN496161.

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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: Echovirus E11 / Type: VIRUS / Entity ID: all / Source: NATURAL
Source (natural)Organism: Echovirus E11
Details of virusEmpty: NO / Enveloped: NO / Isolate: STRAIN / 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: BRIGHT FIELD
Image recordingElectron dose: 1.025 e/Å2 / Film or detector model: FEI FALCON III (4k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.16_3549: / Classification: refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.18 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 26032 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0125555
ELECTRON MICROSCOPYf_angle_d1.0137580
ELECTRON MICROSCOPYf_dihedral_angle_d9.7483275
ELECTRON MICROSCOPYf_chiral_restr0.067839
ELECTRON MICROSCOPYf_plane_restr0.008976

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