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- EMDB-30254: Cryo-EM structure of mature Coxsackievirus A10 at pH 5.5 -

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Basic information

Entry
Database: EMDB / ID: EMD-30254
TitleCryo-EM structure of mature Coxsackievirus A10 at pH 5.5
Map data
Sample
  • Virus: Coxsackievirus A10
    • Protein or peptide: Capsid protein VP1
    • Protein or peptide: Capsid protein VP2
    • Protein or peptide: Capsid protein VP3
    • Protein or peptide: Capsid protein VP4
  • Ligand: SPHINGOSINE
KeywordsPicornavirus / Coxsackievirus A10 / pH 5.5 / mature particle / VIRUS
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 / cytoplasmic vesicle membrane / endocytosis involved in viral entry into host cell / : ...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 / cytoplasmic vesicle membrane / endocytosis involved in viral entry into host cell / : / nucleoside-triphosphate phosphatase / protein complex oligomerization / monoatomic ion channel activity / RNA helicase activity / 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 / structural molecule activity / virion attachment to host cell / ATP hydrolysis activity / proteolysis / RNA binding / ATP binding / metal ion binding
Similarity search - Function
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 ...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 / 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
Similarity search - Component
Biological speciesCoxsackievirus A10
Methodsingle particle reconstruction / cryo EM / Resolution: 3.2 Å
AuthorsCui Y / Peng R / Gao GF / Qi J
Funding support China, 1 items
OrganizationGrant numberCountry
Chinese Academy of SciencesXDB29010202 China
CitationJournal: Proc Natl Acad Sci U S A / Year: 2020
Title: Molecular basis of Coxsackievirus A10 entry using the two-in-one attachment and uncoating receptor KRM1.
Authors: Yingzi Cui / Ruchao Peng / Hao Song / Zhou Tong / Xiao Qu / Sheng Liu / Xin Zhao / Yan Chai / Peiyi Wang / George F Gao / Jianxun Qi /
Abstract: KREMEN1 (KRM1) has been identified as a functional receptor for Coxsackievirus A10 (CV-A10), a causative agent of hand-foot-and-mouth disease (HFMD), which poses a great threat to infants globally. ...KREMEN1 (KRM1) has been identified as a functional receptor for Coxsackievirus A10 (CV-A10), a causative agent of hand-foot-and-mouth disease (HFMD), which poses a great threat to infants globally. However, the underlying mechanisms for the viral entry process are not well understood. Here we determined the atomic structures of different forms of CV-A10 viral particles and its complex with KRM1 in both neutral and acidic conditions. These structures reveal that KRM1 selectively binds to the mature viral particle above the canyon of the viral protein 1 (VP1) subunit and contacts across two adjacent asymmetry units. The key residues for receptor binding are conserved among most KRM1-dependent enteroviruses, suggesting a uniform mechanism for receptor binding. Moreover, the binding of KRM1 induces the release of pocket factor, a process accelerated under acidic conditions. Further biochemical studies confirmed that receptor binding at acidic pH enabled CV-A10 virion uncoating in vitro. Taken together, these findings provide high-resolution snapshots of CV-A10 entry and identify KRM1 as a two-in-one receptor for enterovirus infection.
History
DepositionApr 28, 2020-
Header (metadata) releaseJul 22, 2020-
Map releaseJul 22, 2020-
UpdateMar 27, 2024-
Current statusMar 27, 2024Processing site: PDBj / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.05
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  • Surface view with fitted model
  • Atomic models: PDB-7bzo
  • Surface level: 0.05
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  • Simplified surface model + fitted atomic model
  • Atomic modelsPDB-7bzo
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_30254.png

Downloads & links

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Map

FileDownload / File: emd_30254.map.gz / Format: CCP4 / Size: 244.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Voxel sizeX=Y=Z: 1.35 Å
Density
Contour LevelBy AUTHOR: 0.05 / Movie #1: 0.05
Minimum - Maximum-0.1596954 - 0.2292021
Average (Standard dev.)0.0004797008 (±0.010714496)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions400400400
Spacing400400400
CellA=B=C: 540.0 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.351.351.35
M x/y/z400400400
origin x/y/z0.0000.0000.000
length x/y/z540.000540.000540.000
α/β/γ90.00090.00090.000
start NX/NY/NZ434333
NX/NY/NZ116118137
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS400400400
D min/max/mean-0.1600.2290.000

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Supplemental data

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Sample components

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Entire : Coxsackievirus A10

EntireName: Coxsackievirus A10
Components
  • Virus: Coxsackievirus A10
    • Protein or peptide: Capsid protein VP1
    • Protein or peptide: Capsid protein VP2
    • Protein or peptide: Capsid protein VP3
    • Protein or peptide: Capsid protein VP4
  • Ligand: SPHINGOSINE

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Supramolecule #1: Coxsackievirus A10

SupramoleculeName: Coxsackievirus A10 / type: virus / ID: 1 / Parent: 0 / Macromolecule list: #1-#4 / NCBI-ID: 42769 / Sci species name: Coxsackievirus A10 / Virus type: VIRION / Virus isolate: STRAIN / Virus enveloped: No / Virus empty: No

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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: Coxsackievirus A10
Molecular weightTheoretical: 33.204332 KDa
SequenceString: GDPVEDIIHD ALGSTARRAI SSVTNAESAA NTTPSSHRLE TGRVPALQAA ETGATSNATD ENMIETRCVV NRNGVLETTI NHFFSRSGL VGVVNLTDGG TDTTGYATWD IDIMGFVQLR RKCEMFTYMR FNAEFTFVTT TKNGEARPYM LQYMYVPPGA P KPTGRDAF ...String:
GDPVEDIIHD ALGSTARRAI SSVTNAESAA NTTPSSHRLE TGRVPALQAA ETGATSNATD ENMIETRCVV NRNGVLETTI NHFFSRSGL VGVVNLTDGG TDTTGYATWD IDIMGFVQLR RKCEMFTYMR FNAEFTFVTT TKNGEARPYM LQYMYVPPGA P KPTGRDAF QWQTATNPSV FVKLTDPPAQ VSVPFMSPAS AYQWFYDGYP TFGQHPETSN TTYGLCPNNM MGTFAVRVVS RE ASQLKLQ TRVYMKLKHV RAWVPRPIRS QPYLLKNFPN YDSSKITNSA RDRSSIKQAN M

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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: Coxsackievirus A10
Molecular weightTheoretical: 27.783105 KDa
SequenceString: SPSVEACGYS DRVAQLTVGN SSITTQEAAN IVLAYGEWPE YCPDTDATAV DKPTRPDVSV NRFYTLDSKM WQENSTGWYW KFPDVLNKT GVFGQNAQFH YLYRSGFCLH VQCNASKFHQ GALLVAVIPE FVIAGRGSNT KPNEAPHPGF TTTFPGTTGA T FHDPYVLD ...String:
SPSVEACGYS DRVAQLTVGN SSITTQEAAN IVLAYGEWPE YCPDTDATAV DKPTRPDVSV NRFYTLDSKM WQENSTGWYW KFPDVLNKT GVFGQNAQFH YLYRSGFCLH VQCNASKFHQ GALLVAVIPE FVIAGRGSNT KPNEAPHPGF TTTFPGTTGA T FHDPYVLD SGVPLSQALI YPHQWINLRT NNCATVIVPY INAVPFDSAI NHSNFGLIVI PVSPLKYSSG ATTAIPITIT IA PLNSEFG GLRQAVSQ

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: Coxsackievirus A10
Molecular weightTheoretical: 26.187623 KDa
SequenceString: GIPAELRPGT NQFLTTDDDT AAPILPGFTP TPTIHIPGEV HSLLELCRVE TILEVNNTTE ATGLTRLLIP VSSQNKADEL CAAFMVDPG RIGPWQSTLV GQICRYYTQW SGSLKVTFMF TGSFMATGKM LVAYSPPGSA QPANRETAML GTHVIWDFGL Q SSVSLVIP ...String:
GIPAELRPGT NQFLTTDDDT AAPILPGFTP TPTIHIPGEV HSLLELCRVE TILEVNNTTE ATGLTRLLIP VSSQNKADEL CAAFMVDPG RIGPWQSTLV GQICRYYTQW SGSLKVTFMF TGSFMATGKM LVAYSPPGSA QPANRETAML GTHVIWDFGL Q SSVSLVIP WISNTHFRTA KTGGNYDYYT AGVVTLWYQT NYVVPPETPG EAYIIAMGAA QDNFTLKICK DTDEVTQQAV LQ

UniProtKB: Genome polyprotein

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Macromolecule #4: Capsid protein VP4

MacromoleculeName: Capsid protein VP4 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Coxsackievirus A10
Molecular weightTheoretical: 7.464104 KDa
SequenceString:
MGAQVSTQKS GSHETGNVAT GGSTINFTNI NYYKDSYAAS ATRQDFTQDP KKFTQPVLDS IRELSAPLN

UniProtKB: Genome polyprotein

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Macromolecule #5: SPHINGOSINE

MacromoleculeName: SPHINGOSINE / type: ligand / ID: 5 / Number of copies: 1 / Formula: SPH
Molecular weightTheoretical: 299.492 Da
Chemical component information

ChemComp-SPH:
SPHINGOSINE / Sphingosine

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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: 5.5
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 40.0 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: PDB ENTRY
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 22864
FSC plot (resolution estimation)

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