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- PDB-6lhc: The cryo-EM structure of coxsackievirus A16 empty particle -

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Basic information

Entry
Database: PDB / ID: 6lhc
TitleThe cryo-EM structure of coxsackievirus A16 empty particle
Components
  • VP1
  • VP2
  • VP3
KeywordsVIRUS
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 / endocytosis involved in viral entry into host cell / cytoplasmic vesicle membrane / : ...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 / endocytosis involved in viral entry into host cell / cytoplasmic vesicle membrane / : / viral capsid / nucleoside-triphosphate phosphatase / protein complex oligomerization / monoatomic ion channel activity / : / RNA helicase activity / DNA replication / induction by virus of host autophagy / RNA-directed RNA polymerase / symbiont-mediated suppression of host gene expression / viral RNA genome replication / cysteine-type endopeptidase activity / RNA-dependent RNA polymerase activity / DNA-templated transcription / host cell nucleus / structural molecule activity / virion attachment to host cell / ATP hydrolysis activity / proteolysis / RNA binding / ATP binding / membrane / metal ion binding
Similarity search - Function
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) ...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) / Picornavirales 3C/3C-like protease domain / Picornavirales 3C/3C-like protease domain profile. / Peptidase C3A/C3B, picornaviral / 3C cysteine protease (picornain 3C) / 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 / DNA/RNA polymerase superfamily / Peptidase S1, PA clan / Sandwich / P-loop containing nucleoside triphosphate hydrolase / Mainly Beta
Similarity search - Domain/homology
Genome polyprotein / Genome polyprotein / Genome polyprotein / Genome polyprotein
Similarity search - Component
Biological speciesCoxsackievirus A16
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.43 Å
AuthorsHe, M.Z. / Xu, L.F. / Zheng, Q.B. / Zhu, R. / Yin, Z.C. / Cheng, T. / Li, S.W.
Funding support China, United States, 9items
OrganizationGrant numberCountry
National Natural Science Foundation of China81991490 China
National Science Foundation (China)2018ZX09711003-005-003 China
National Science Foundation (China)2017ZX10304402-002-003 China
National Natural Science Foundation of China31670933 China
National Natural Science Foundation of China81801646 China
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R37-GM33050 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM071940 United States
National Institutes of Health/National Institute of Dental and Craniofacial Research (NIH/NIDCR)DE025567 United States
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)AI094386 United States
CitationJournal: Cell Host Microbe / Year: 2020
Title: Identification of Antibodies with Non-overlapping Neutralization Sites that Target Coxsackievirus A16.
Authors: Maozhou He / Longfa Xu / Qingbing Zheng / Rui Zhu / Zhichao Yin / Zhenghui Zha / Yu Lin / Lisheng Yang / Yang Huang / Xiangzhong Ye / Shuxuan Li / Wangheng Hou / Yangtao Wu / Jinle Han / ...Authors: Maozhou He / Longfa Xu / Qingbing Zheng / Rui Zhu / Zhichao Yin / Zhenghui Zha / Yu Lin / Lisheng Yang / Yang Huang / Xiangzhong Ye / Shuxuan Li / Wangheng Hou / Yangtao Wu / Jinle Han / Dongxiao Liu / Zekai Li / Zhenqin Chen / Hai Yu / Yuqiong Que / Yingbin Wang / Xiaodong Yan / Jun Zhang / Ying Gu / Z Hong Zhou / Tong Cheng / Shaowei Li / Ningshao Xia /
Abstract: Hand, foot, and mouth disease is a common childhood illness primarily caused by coxsackievirus A16 (CVA16), for which there are no current vaccines or treatments. We identify three CVA16-specific ...Hand, foot, and mouth disease is a common childhood illness primarily caused by coxsackievirus A16 (CVA16), for which there are no current vaccines or treatments. We identify three CVA16-specific neutralizing monoclonal antibodies (nAbs) with therapeutic potential: 18A7, 14B10, and NA9D7. We present atomic structures of these nAbs bound to all three viral particle forms-the mature virion, A-particle, and empty particle-and show that each Fab can simultaneously occupy the mature virion. Additionally, 14B10 or NA9D7 provide 100% protection against lethal CVA16 infection in a neonatal mouse model. 18A7 binds to a non-conserved epitope present in all three particles, whereas 14B10 and NA9D7 recognize broad protective epitopes but only bind the mature virion. NA9D7 targets an immunodominant site, which may overlap the receptor-binding site. These findings indicate that CVA16 vaccines should be based on mature virions and that these antibodies could be used to discriminate optimal virion-based immunogens.
History
DepositionDec 7, 2019Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Feb 5, 2020Provider: repository / Type: Initial release
Revision 1.1Feb 19, 2020Group: Database references / Category: citation / citation_author / Item: _citation.pdbx_database_id_PubMed / _citation.title
Revision 1.2Feb 26, 2020Group: Database references / Category: citation / Item: _citation.journal_volume / _citation.page_first
Revision 1.3Mar 23, 2022Group: Author supporting evidence / Database references / Derived calculations
Category: database_2 / pdbx_audit_support / pdbx_struct_oper_list
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _pdbx_audit_support.funding_organization / _pdbx_struct_oper_list.name / _pdbx_struct_oper_list.symmetry_operation / _pdbx_struct_oper_list.type

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Structure visualization

Movie
  • 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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Structure viewerMolecule:
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Assembly

Deposited unit
A: VP1
B: VP2
C: VP3


Theoretical massNumber of molelcules
Total (without water)87,3183
Polymers87,3183
Non-polymers00
Water0
1
A: VP1
B: VP2
C: VP3
x 60


Theoretical massNumber of molelcules
Total (without water)5,239,065180
Polymers5,239,065180
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
A: VP1
B: VP2
C: VP3
x 5


  • icosahedral pentamer
  • 437 kDa, 15 polymers
Theoretical massNumber of molelcules
Total (without water)436,58915
Polymers436,58915
Non-polymers00
Water0
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
point symmetry operation4
4
A: VP1
B: VP2
C: VP3
x 6


  • icosahedral 23 hexamer
  • 524 kDa, 18 polymers
Theoretical massNumber of molelcules
Total (without water)523,90718
Polymers523,90718
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: 33106.352 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Coxsackievirus A16 / References: UniProt: A0A2S1BJ89, UniProt: Q9QF31*PLUS
#2: Protein VP2


Mass: 27557.104 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Coxsackievirus A16
References: UniProt: A0A1D3TZV2, UniProt: Q9QF31*PLUS, picornain 2A, nucleoside-triphosphate phosphatase, picornain 3C, RNA-directed RNA polymerase
#3: Protein VP3


Mass: 26654.295 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Coxsackievirus A16
References: UniProt: A0A2R4NBT3, UniProt: Q9QF31*PLUS, picornain 2A, nucleoside-triphosphate phosphatase, picornain 3C, RNA-directed RNA polymerase

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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: Coxsackievirus A16 / Type: VIRUS / Entity ID: all / Source: NATURAL
Source (natural)Organism: Coxsackievirus A16
Details of virusEmpty: YES / 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: Tecnai F30 / Image courtesy: FEI Company
MicroscopyModel: FEI TECNAI F30
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy
Image recordingElectron dose: 40 e/Å2 / Detector mode: INTEGRATING / Film or detector model: FEI FALCON II (4k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.14_3259: / Classification: refinement
CTF correctionType: PHASE FLIPPING ONLY
SymmetryPoint symmetry: I (icosahedral)
3D reconstructionResolution: 3.43 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 11574 / Symmetry type: POINT

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