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- EMDB-31570: Cryo-EM structure of VEEV VLP at the 5-fold axes -

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Basic information

Entry
Database: EMDB / ID: EMD-31570
TitleCryo-EM structure of VEEV VLP at the 5-fold axes
Map dataCryo-EM structure of VEEV VLP at the 5-fold axes
Sample
  • Virus: Venezuelan equine encephalitis virus (strain TC-83)
    • Protein or peptide: Capsid proteinCapsid
    • Protein or peptide: assembly protein E3
    • Protein or peptide: Spike glycoprotein E2
    • Protein or peptide: Spike glycoprotein E1
Function / homology
Function and homology information


togavirin / T=4 icosahedral viral capsid / symbiont-mediated suppression of host toll-like receptor signaling pathway / clathrin-dependent endocytosis of virus by host cell / host cell cytoplasm / symbiont-mediated suppression of host gene expression / serine-type endopeptidase activity / fusion of virus membrane with host endosome membrane / viral envelope / host cell nucleus ...togavirin / T=4 icosahedral viral capsid / symbiont-mediated suppression of host toll-like receptor signaling pathway / clathrin-dependent endocytosis of virus by host cell / host cell cytoplasm / symbiont-mediated suppression of host gene expression / serine-type endopeptidase activity / fusion of virus membrane with host endosome membrane / viral envelope / host cell nucleus / structural molecule activity / virion attachment to host cell / host cell plasma membrane / virion membrane / proteolysis / RNA binding / membrane
Similarity search - Function
Alphavirus E2 glycoprotein, domain B / Peptidase S3, togavirin / Alphavirus E2 glycoprotein / Alphavirus E3 spike glycoprotein / Alphavirus E1 glycoprotein / Alphavirus E2 glycoprotein, domain A / Alphavirus E2 glycoprotein, domain C / Alphavirus E2 glycoprotein / Alphavirus core protein / Alphavirus E3 glycoprotein ...Alphavirus E2 glycoprotein, domain B / Peptidase S3, togavirin / Alphavirus E2 glycoprotein / Alphavirus E3 spike glycoprotein / Alphavirus E1 glycoprotein / Alphavirus E2 glycoprotein, domain A / Alphavirus E2 glycoprotein, domain C / Alphavirus E2 glycoprotein / Alphavirus core protein / Alphavirus E3 glycoprotein / Alphavirus E1 glycoprotein / Alphavirus core protein (CP) domain profile. / Flavivirus/Alphavirus glycoprotein, immunoglobulin-like domain superfamily / Flavivirus glycoprotein, central and dimerisation domain superfamily / Flaviviral glycoprotein E, dimerisation domain / Immunoglobulin E-set / Peptidase S1, PA clan, chymotrypsin-like fold / Peptidase S1, PA clan
Similarity search - Domain/homology
Structural polyprotein
Similarity search - Component
Biological speciesVenezuelan equine encephalitis virus (strain TC-83)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.5 Å
AuthorsZhang X / Xiang Y / Ma J / Ma B / Huang C
CitationJournal: Nature / Year: 2021
Title: Structure of Venezuelan equine encephalitis virus with its receptor LDLRAD3.
Authors: Bingting Ma / Cuiqing Huang / Jun Ma / Ye Xiang / Xinzheng Zhang /
Abstract: Venezuelan equine encephalitis virus (VEEV) is an enveloped RNA virus that causes encephalitis and potentially mortality in infected humans and equines. At present, no vaccines or drugs are available ...Venezuelan equine encephalitis virus (VEEV) is an enveloped RNA virus that causes encephalitis and potentially mortality in infected humans and equines. At present, no vaccines or drugs are available that prevent or cure diseases caused by VEEV. Low-density lipoprotein receptor class A domain-containing 3 (LDLRAD3) was recently identified as a receptor for the entry of VEEV into host cells. Here we present the cryo-electron microscopy structure of the LDLRAD3 extracellular domain 1 (LDLRAD3-D1) in complex with VEEV virus-like particles at a resolution of 3.0 Å. LDLRAD3-D1 has a cork-like structure and is inserted into clefts formed between adjacent VEEV E2-E1 heterodimers in the viral-surface trimer spikes through hydrophobic and polar contacts. Mutagenesis studies of LDLRAD3-D1 identified residues that are involved in the key interactions with VEEV. Of note, some of the LDLRAD3-D1 mutants showed a significantly increased binding affinity for VEEV, suggesting that LDLRAD3-D1 may serve as a potential scaffold for the development of inhibitors of VEEV entry. Our structures provide insights into alphavirus assembly and the binding of receptors to alphaviruses, which may guide the development of therapeutic countermeasures against alphaviruses.
History
DepositionJul 23, 2021-
Header (metadata) releaseOct 20, 2021-
Map releaseOct 20, 2021-
UpdateNov 17, 2021-
Current statusNov 17, 2021Processing site: PDBj / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.025
  • Imaged by UCSF Chimera
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  • Surface view colored by height
  • Surface level: 0.025
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7ffo
  • Surface level: 0.025
  • Imaged by UCSF Chimera
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  • Simplified surface model + fitted atomic model
  • Atomic modelsPDB-7ffo
  • Imaged by Jmol
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Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_31570.png

Downloads & links

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Map

FileDownload / File: emd_31570.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationCryo-EM structure of VEEV VLP at the 5-fold axes
Voxel sizeX=Y=Z: 1.32 Å
Density
Contour LevelBy AUTHOR: 0.025 / Movie #1: 0.025
Minimum - Maximum-0.0888269 - 0.14090271
Average (Standard dev.)0.00061916286 (±0.00680377)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin-128-128-128
Dimensions256256256
Spacing256256256
CellA=B=C: 337.92 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.321.321.32
M x/y/z256256256
origin x/y/z0.0000.0000.000
length x/y/z337.920337.920337.920
α/β/γ90.00090.00090.000
start NX/NY/NZ336210602
NX/NY/NZ227193139
MAP C/R/S123
start NC/NR/NS-128-128-128
NC/NR/NS256256256
D min/max/mean-0.0890.1410.001

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Supplemental data

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Sample components

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Entire : Venezuelan equine encephalitis virus (strain TC-83)

EntireName: Venezuelan equine encephalitis virus (strain TC-83)
Components
  • Virus: Venezuelan equine encephalitis virus (strain TC-83)
    • Protein or peptide: Capsid proteinCapsid
    • Protein or peptide: assembly protein E3
    • Protein or peptide: Spike glycoprotein E2
    • Protein or peptide: Spike glycoprotein E1

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Supramolecule #1: Venezuelan equine encephalitis virus (strain TC-83)

SupramoleculeName: Venezuelan equine encephalitis virus (strain TC-83) / type: virus / ID: 1 / Parent: 0 / Macromolecule list: all / NCBI-ID: 11037
Sci species name: Venezuelan equine encephalitis virus (strain TC-83)
Virus type: VIRUS-LIKE PARTICLE / Virus isolate: STRAIN / Virus enveloped: Yes / Virus empty: Yes
Host systemOrganism: Homo sapiens (human)

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Macromolecule #1: Capsid protein

MacromoleculeName: Capsid protein / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO / EC number: togavirin
Source (natural)Organism: Venezuelan equine encephalitis virus (strain TC-83)
Strain: TC-83
Molecular weightTheoretical: 30.980801 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MFPFQPMYPM QPMPYRNPFA APRRPWFPRT DPFLAMQVQE LTRSMANLTF KQRRDAPPEG PSANKPKKEA SQKQKGGGQG KKKKNQGKK KAKTGPPNPK AQNGNKKKTN KKPGKRQRMV MKLESDKTFP IMLEGKINGY ACVVGGKLFR PMHVEGKIDN D VLAALKTK ...String:
MFPFQPMYPM QPMPYRNPFA APRRPWFPRT DPFLAMQVQE LTRSMANLTF KQRRDAPPEG PSANKPKKEA SQKQKGGGQG KKKKNQGKK KAKTGPPNPK AQNGNKKKTN KKPGKRQRMV MKLESDKTFP IMLEGKINGY ACVVGGKLFR PMHVEGKIDN D VLAALKTK KASKYDLEYA DVPQNMRADT FKYTHEKPQG YYSWHHGAVQ YENGRFTVPK GVGAKGDSGR PILDNQGRVV AI VLGGVNE GSRTALSVVM WNEKGVTVKY TPENCEQW

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Macromolecule #2: assembly protein E3

MacromoleculeName: assembly protein E3 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Venezuelan equine encephalitis virus (strain TC-83)
Strain: TC-83
Molecular weightTheoretical: 6.488601 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString:
SLVTTMCLLA NVTFPCAQPP ICYDRKPAET LAMLSVNVDN PGYDELLEAA VKCPGRKRR

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Macromolecule #3: Spike glycoprotein E2

MacromoleculeName: Spike glycoprotein E2 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Venezuelan equine encephalitis virus (strain TC-83)
Strain: TC-83
Molecular weightTheoretical: 47.113746 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: STEELFNEYK LTRPYMARCI RCAVGSCHSP IAIEAVKSDG HDGYVRLQTS SQYGLDSSGN LKGRTMRYDM HGTIKEIPLH QVSLYTSRP CHIVDGHGYF LLARCPAGDS ITMEFKKDSV RHSCSVPYEV KFNPVGRELY THPPEHGVEQ ACQVYAHDAQ N RGAYVEMH ...String:
STEELFNEYK LTRPYMARCI RCAVGSCHSP IAIEAVKSDG HDGYVRLQTS SQYGLDSSGN LKGRTMRYDM HGTIKEIPLH QVSLYTSRP CHIVDGHGYF LLARCPAGDS ITMEFKKDSV RHSCSVPYEV KFNPVGRELY THPPEHGVEQ ACQVYAHDAQ N RGAYVEMH LPGSEVDSSL VSLSGSSVTV TPPDGTSALV ECECGGTKIS ETINKTKQFS QCTKKEQCRA YRLQNDKWVY NS DKLPKAA GATLKGKLHV PFLLADGKCT VPLAPEPMIT FGFRSVSLKL HPKNPTYLIT RQLADEPHYT HELISEPAVR NFT VTEKGW EFVWGNHPPK RFWAQETAPG NPHGLPHEVI THYYHRYPMS TILGLSICAA IATVSVAAST WLFCRSRVAC LTPY RLTPN ARIPFCLAVL CCARTARA

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Macromolecule #4: Spike glycoprotein E1

MacromoleculeName: Spike glycoprotein E1 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Venezuelan equine encephalitis virus (strain TC-83)
Strain: TC-83
Molecular weightTheoretical: 47.952066 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: YEHATTMPSQ AGISYNTIVN RAGYAPLPIS ITPTKIKLIP TVNLEYVTCH YKTGMDSPAI KCCGSQECTP TYRPDEQCKV FTGVYPFMW GGAYCFCDTE NTQVSKAYVM KSDDCLADHA EAYKAHTASV QAFLNITVGE HSIVTTVYVN GETPVNFNGV K ITAGPLST ...String:
YEHATTMPSQ AGISYNTIVN RAGYAPLPIS ITPTKIKLIP TVNLEYVTCH YKTGMDSPAI KCCGSQECTP TYRPDEQCKV FTGVYPFMW GGAYCFCDTE NTQVSKAYVM KSDDCLADHA EAYKAHTASV QAFLNITVGE HSIVTTVYVN GETPVNFNGV K ITAGPLST AWTPFDRKIV QYAGEIYNYD FPEYGAGQPG AFGDIQSRTV SSSDLYANTN LVLQRPKAGA IHVPYTQAPS GF EQWKKDK APSLKFTAPF GCEIYTNPIR AENCAVGSIP LAFDIPDALF TRVSETPTLS AAECTLNECV YSSDFGGIAT VKY SASKSG KCAVHVPSGT ATLKEAAVEL TEQGSATIHF STANIHPEFR LQICTSYVTC KGDCHPPKDH IVTHPQYHAQ TFTA AVSKT AWTWLTSLLG GSAVIIIIGL VLATIVAMYV LTNQKHN

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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: 8
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TECNAI ARCTICA
Electron beamAcceleration voltage: 200 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: Talos Arctica / Image courtesy: FEI Company

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Image processing

Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.5 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 344824

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