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- EMDB-38167: Cryo-EM structure of enterovirus A71 empty particle in complex wi... -

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Basic information

Entry
Database: EMDB / ID: EMD-38167
TitleCryo-EM structure of enterovirus A71 empty particle in complex with Fab h1A6.2
Map data
Sample
  • Complex: Enterovirus A71 empty particle in complex with Fab h1A6.2
    • Complex: The Fab of h1A6.2
    • Virus: Enterovirus A71
      • Protein or peptide: Capsid protein VP1
      • Protein or peptide: Capsid protein VP2
      • Protein or peptide: Capsid protein VP3
KeywordsCryo-EM STRUCTURE / VIRUS / ENTEROVIRUS A71
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 / ribonucleoside triphosphate phosphatase activity / picornain 3C / T=pseudo3 icosahedral viral capsid / host cell cytoplasmic vesicle membrane / nucleoside-triphosphate phosphatase / channel 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 / ribonucleoside triphosphate phosphatase activity / picornain 3C / T=pseudo3 icosahedral viral capsid / host cell cytoplasmic vesicle membrane / 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 / virion attachment to host cell / host cell nucleus / structural molecule activity / proteolysis / RNA binding / zinc ion binding / ATP binding / membrane
Similarity search - Function
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) ...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 / 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
Biological speciesMus (mice) / Enterovirus A71
Methodsingle particle reconstruction / cryo EM / Resolution: 2.98 Å
AuthorsJiang Y / Huang Y / Zhu R / Zheng Q / Li S
Funding support1 items
OrganizationGrant numberCountry
Not funded
CitationJournal: Nat Microbiol / Year: 2024
Title: Broadly therapeutic antibody provides cross-serotype protection against enteroviruses via Fc effector functions and by mimicking SCARB2.
Authors: Rui Zhu / Yuanyuan Wu / Yang Huang / Yanan Jiang / Yichao Jiang / Dongqing Zhang / Hui Sun / Zhenhong Zhou / Lizhi Zhou / Shihan Weng / Hao Chen / Xiaoqing Chen / Wenjing Ning / Yuxiang Zou ...Authors: Rui Zhu / Yuanyuan Wu / Yang Huang / Yanan Jiang / Yichao Jiang / Dongqing Zhang / Hui Sun / Zhenhong Zhou / Lizhi Zhou / Shihan Weng / Hao Chen / Xiaoqing Chen / Wenjing Ning / Yuxiang Zou / Maozhou He / Hongwei Yang / Weixi Deng / Yu Li / Zhenqin Chen / Xiangzhong Ye / Jinle Han / Zhichao Yin / Huan Zhao / Che Liu / Yuqiong Que / Mujin Fang / Hai Yu / Jun Zhang / Wenxin Luo / Shaowei Li / Qingbing Zheng / Longfa Xu / Ningshao Xia / Tong Cheng /
Abstract: Enteroviruses contain multiple serotypes and can cause severe neurological complications. The intricate life cycle of enteroviruses involving dynamic virus-receptor interaction hampers the ...Enteroviruses contain multiple serotypes and can cause severe neurological complications. The intricate life cycle of enteroviruses involving dynamic virus-receptor interaction hampers the development of broad therapeutics and vaccines. Here, using function-based screening, we identify a broadly therapeutic antibody h1A6.2 that potently protects mice in lethal models of infection with both enterovirus A71 and coxsackievirus A16 through multiple mechanisms, including inhibition of the virion-SCARB2 interactions and monocyte/macrophage-dependent Fc effector functions. h1A6.2 mitigates inflammation and improves intramuscular mechanics, which are associated with diminished innate immune signalling and preserved tissue repair. Moreover, cryogenic electron microscopy structures delineate an adaptive binding of h1A6.2 to the flexible and dynamic nature of the VP2 EF loop with a binding angle mimicking the SCARB2 receptor. The coordinated binding mode results in efficient binding of h1A6.2 to all viral particle types and facilitates broad neutralization of enterovirus, therefore informing a promising target for the structure-guided design of pan-enterovirus vaccine.
History
DepositionNov 29, 2023-
Header (metadata) releaseSep 4, 2024-
Map releaseSep 4, 2024-
UpdateJun 18, 2025-
Current statusJun 18, 2025Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_38167.png

Downloads & links

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Map

FileDownload / File: emd_38167.map.gz / Format: CCP4 / Size: 729 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

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AxesZ (Sec.)Y (Row.)X (Col.)
1 Å/pix.
x 576 pix.
= 576. Å		1 Å/pix.
x 576 pix.
= 576. Å		1 Å/pix.
x 576 pix.
= 576. Å

Surface

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Images are generated by Spider.

Voxel sizeX=Y=Z: 1 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.15
Minimum - Maximum-0.93998617 - 1.4051054
Average (Standard dev.)0.0004642356 (±0.066442005)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions576576576
Spacing576576576
CellA=B=C: 576.0 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #2

Fileemd_38167_half_map_1.map
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_38167_half_map_2.map
Projections & Slices
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Sample components

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Entire : Enterovirus A71 empty particle in complex with Fab h1A6.2

EntireName: Enterovirus A71 empty particle in complex with Fab h1A6.2
Components
  • Complex: Enterovirus A71 empty particle in complex with Fab h1A6.2
    • Complex: The Fab of h1A6.2
    • Virus: Enterovirus A71
      • Protein or peptide: Capsid protein VP1
      • Protein or peptide: Capsid protein VP2
      • Protein or peptide: Capsid protein VP3

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Supramolecule #1: Enterovirus A71 empty particle in complex with Fab h1A6.2

SupramoleculeName: Enterovirus A71 empty particle in complex with Fab h1A6.2
type: complex / ID: 1 / Parent: 0 / Macromolecule list: all

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Supramolecule #3: The Fab of h1A6.2

SupramoleculeName: The Fab of h1A6.2 / type: complex / ID: 3 / Parent: 1
Source (natural)Organism: Mus (mice)

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Supramolecule #2: Enterovirus A71

SupramoleculeName: Enterovirus A71 / type: virus / ID: 2 / Parent: 1 / Macromolecule list: all / NCBI-ID: 39054 / Sci species name: Enterovirus A71 / Virus type: VIRION / Virus isolate: OTHER / Virus enveloped: No / Virus empty: Yes

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Macromolecule #1: Capsid protein VP1

MacromoleculeName: Capsid protein VP1 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Enterovirus A71
Molecular weightTheoretical: 32.730848 KDa
SequenceString: GDRVADVIES SIGDSVSRAL THALPAPTGQ DTQVSSHRLD TGKVPALQAA EIGASSNASD ESMIETRCVL NSHSTAETTL DSFFSRAGL VGEIDLPLKG TTNPNGYANW DIDITGYAQM RRKVELFTYM RFDAEFTFVA CTPTGEVVPQ LLQYMFVPPG A PKPDSRES ...String:
GDRVADVIES SIGDSVSRAL THALPAPTGQ DTQVSSHRLD TGKVPALQAA EIGASSNASD ESMIETRCVL NSHSTAETTL DSFFSRAGL VGEIDLPLKG TTNPNGYANW DIDITGYAQM RRKVELFTYM RFDAEFTFVA CTPTGEVVPQ LLQYMFVPPG A PKPDSRES LAWQTATNPS VFVKLSDPPA QVSVPFMSPA SAYQWFYDGY PTFGEHKQEK DLEYGACPNN MMGTFSVRTV GT SKSKYPL VVRIYMRMKH VRAWIPRPMR NQNYLFKANP NYAGNSIKPT GTSRTAITTL

UniProtKB: Genome polyprotein

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Macromolecule #2: Capsid protein VP2

MacromoleculeName: Capsid protein VP2 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Enterovirus A71
Molecular weightTheoretical: 27.726135 KDa
SequenceString: SPSAEACGYS DRVAQLTIGN STITTQEAAN IIVGYGEWPS YCSDSDATAV DKPTRPDVSV NRFYTLDTKL WEKSSKGWYW KFPDVLTET GVFGQNAQFH YLYRSGFCIH VQCNASKFHQ GALLVAVLPE YVIGTVAGGT GTEDSHPPYK QTQPGADGFE L QHPYVLDA ...String:
SPSAEACGYS DRVAQLTIGN STITTQEAAN IIVGYGEWPS YCSDSDATAV DKPTRPDVSV NRFYTLDTKL WEKSSKGWYW KFPDVLTET GVFGQNAQFH YLYRSGFCIH VQCNASKFHQ GALLVAVLPE YVIGTVAGGT GTEDSHPPYK QTQPGADGFE L QHPYVLDA GIPISQLTVC PHQWINLRTN NCATIIVPYI NALPFDSALN HCNFGLLVVP ISPLDYDQGA TPVIPITITL AP MCSEFAG LRQAVTQ

UniProtKB: Genome polyprotein

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Macromolecule #3: Capsid protein VP3

MacromoleculeName: Capsid protein VP3 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Enterovirus A71
Molecular weightTheoretical: 26.468225 KDa
SequenceString: GFPTELKPGT NQFLTTDDGV SAPILPNFHP TPCIHIPGEV RNLLELCQVE TILEVNNVPT NATSLMERLR FPVSAQAGKG ELCAVFRAD PGRNGPWQST LLGQLCGYYT QWSGSLEVTF MFTGSFMATG KMLIAYTPPG GPLPKDRATA MLGTHVIWDF G LQSSVTLV ...String:
GFPTELKPGT NQFLTTDDGV SAPILPNFHP TPCIHIPGEV RNLLELCQVE TILEVNNVPT NATSLMERLR FPVSAQAGKG ELCAVFRAD PGRNGPWQST LLGQLCGYYT QWSGSLEVTF MFTGSFMATG KMLIAYTPPG GPLPKDRATA MLGTHVIWDF G LQSSVTLV IPWISNTHYR AHARDGVFDY YTTGLVSIWY QTNYVVPIGA PNTAYIIALA AAQKNFTMKL CKDASDILQT GT IQ

UniProtKB: Genome polyprotein

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 7.4
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TECNAI F30
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 40.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: OTHER
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 3.0 µm / Nominal defocus min: 0.7000000000000001 µm
Experimental equipment
Model: Tecnai F30 / Image courtesy: FEI Company

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Image processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: OTHER
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.98 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 46843
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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