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- PDB-9riq: EV-A71 (genotype C4) in complex with 16-2-11B Fab -

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Basic information

Entry
Database: PDB / ID: 9riq
TitleEV-A71 (genotype C4) in complex with 16-2-11B Fab
Components
  • (Genome polyprotein) x 3
  • VP4
  • heavy chain
  • light chain
KeywordsVIRUS / Hand-foot-and-mouth disease / HFMD / enterovirus 71 (EV-A71) / Human antibody / 16-2-11B
Function / homology
Function and homology information


symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MDA-5 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 / virion component / viral capsid / ribonucleoside triphosphate phosphatase activity ...symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MDA-5 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 / virion component / viral capsid / ribonucleoside triphosphate phosphatase activity / 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 / symbiont entry into host cell / DNA-templated transcription / virion attachment to host cell / host cell nucleus / structural molecule activity / proteolysis / RNA binding / zinc ion binding / ATP binding
Similarity search - Function
Picornavirus coat protein VP4 superfamily / : / Picornavirus coat protein / 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 superfamily / : / Picornavirus coat protein / 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 / Reverse transcriptase/Diguanylate cyclase domain / RNA-directed RNA polymerase, C-terminal domain / Viral RNA-dependent RNA polymerase / 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
SPHINGOSINE / Genome polyprotein / Genome polyprotein / Genome polyprotein / VP4
Similarity search - Component
Biological speciesHomo sapiens (human)
Chlorocebus aethiops (grivet monkey)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.3 Å
AuthorsZhou, D. / Ren, J. / Stuart, D.I.
Funding support United Kingdom, 1items
OrganizationGrant numberCountry
Medical Research Council (MRC, United Kingdom)MR/N00065X/1 United Kingdom
CitationJournal: Science Advances / Year: 2026
Title: Structural and functional mapping of protective human monoclonal antibodies against enterovirus A71
Authors: Zhou, D. / Kotecha, A. / Kelly, J.T. / Huang, P. / Chen, Y. / Walter, T.S. / Duyvesteyn, H.M.E. / Owens, R.J. / Ho, S. / Lin, T. / Fry, E.E. / Ren, J. / Huang, K. / Stuart, D.I.
History
DepositionJun 11, 2025Deposition site: PDBE / Processing site: PDBE
Revision 1.0Apr 29, 2026Provider: repository / Type: Initial release
Revision 1.0Apr 29, 2026Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Apr 29, 2026Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Apr 29, 2026Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Apr 29, 2026Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Apr 29, 2026Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Genome polyprotein
B: Genome polyprotein
C: Genome polyprotein
D: VP4
L: light chain
H: heavy chain
hetero molecules


Theoretical massNumber of molelcules
Total (without water)140,9167
Polymers140,6176
Non-polymers2991
Water00
1
A: Genome polyprotein
B: Genome polyprotein
C: Genome polyprotein
D: VP4
L: light chain
H: heavy chain
hetero molecules
x 60


Theoretical massNumber of molelcules
Total (without water)8,454,982420
Polymers8,437,013360
Non-polymers17,97060
Water0
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
point symmetry operation59

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Components

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Protein , 4 types, 4 molecules ABCD

#1: Protein Genome polyprotein


Mass: 32727.891 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlorocebus aethiops (grivet monkey) / References: UniProt: A0A169PX97
#2: Protein Genome polyprotein


Mass: 26874.252 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlorocebus aethiops (grivet monkey)
References: UniProt: A0A0B4ZU19, picornain 2A, nucleoside-triphosphate phosphatase, picornain 3C, RNA-directed RNA polymerase
#3: Protein Genome polyprotein


Mass: 26468.225 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlorocebus aethiops (grivet monkey)
References: UniProt: A0A0B4KE69, picornain 2A, nucleoside-triphosphate phosphatase, picornain 3C, RNA-directed RNA polymerase
#4: Protein VP4


Mass: 6380.943 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlorocebus aethiops (grivet monkey) / References: UniProt: A0A1P8C9W0

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Antibody , 2 types, 2 molecules LH

#5: Antibody light chain


Mass: 22870.238 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)
#6: Antibody heavy chain


Mass: 25295.326 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)

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Non-polymers , 1 types, 1 molecules

#7: Chemical ChemComp-SPH / SPHINGOSINE


Mass: 299.492 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C18H37NO2 / Feature type: SUBJECT OF INVESTIGATION

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Details

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

Component
IDNameTypeEntity IDParent-IDSource
1EV-A71/16-2-11B Fab complexCOMPLEX#1-#60MULTIPLE SOURCES
2EV-A71COMPLEX#1-#41NATURAL
316-2-11B FabCOMPLEX#5-#61RECOMBINANT
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
21Enterovirus A7139054
32Chlorocebus aethiops (grivet monkey)9534
43Homo sapiens (human)9606
Source (recombinant)Organism: Homo sapiens (human)
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: Tecnai Polara / Image courtesy: FEI Company
MicroscopyModel: FEI POLARA 300
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 500 nm
Image recordingElectron dose: 27 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

EM softwareName: PHENIX / Version: 1.20.1_4487 / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 5881 / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT / Space: REAL
RefinementHighest resolution: 3.3 Å
Stereochemistry target values: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS)

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