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- EMDB-30337: CryoEM structure of Zika virus with Fab at 4.1 Angstrom -

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Basic information

Entry
Database: EMDB / ID: EMD-30337
TitleCryoEM structure of Zika virus with Fab at 4.1 Angstrom
Map data
Sample
  • Complex: Zika virus
    • Complex: Zika virus M and E proteins
      • Protein or peptide: Small envelope protein M
      • Protein or peptide: Envelope protein E
    • Complex: FAB
      • Protein or peptide: Fab Heavy chain
      • Protein or peptide: Fab light chain
Function / homology
Function and homology information


response to herbicide / photosystem II / photosynthetic electron transport in photosystem II / chlorophyll binding / plasma membrane-derived thylakoid membrane / electron transporter, transferring electrons within the cyclic electron transport pathway of photosynthesis activity / metal ion binding
Similarity search - Function
Photosystem II protein D1 / Photosynthetic reaction centre, L/M / Photosystem II protein D1/D2 superfamily / Photosynthetic reaction centre protein / Photosynthetic reaction center proteins signature.
Similarity search - Domain/homology
Photosystem q(B) protein
Similarity search - Component
Biological speciesZika virus / Homo sapiens (human) / ZIKV (virus)
Methodsingle particle reconstruction / cryo EM / Resolution: 4.1 Å
AuthorsTyagi A / Ahmed T / Shi J / Bhushan S
Funding support1 items
OrganizationGrant numberCountry
Ministry of Education (MoE, Singapore)2017-T1- 001-022 (RG34/17), MOE2017-T2-2-089
CitationJournal: J Struct Biol X / Year: 2020
Title: A complex between the Zika virion and the Fab of a broadly cross-reactive neutralizing monoclonal antibody revealed by cryo-EM and single particle analysis at 4.1 Å resolution.
Authors: Anu Tyagi / Tofayel Ahmed / Jian Shi / Shashi Bhushan /
Abstract: Zika virus (ZIKV) recently emerged as a major public health concern because it can cause fetal microcephaly and neurological disease such as the Guillain-Barré syndrome. A particularly potent class ...Zika virus (ZIKV) recently emerged as a major public health concern because it can cause fetal microcephaly and neurological disease such as the Guillain-Barré syndrome. A particularly potent class of broadly neutralizing antibodies (nAbs) targets a quaternary epitope located at the interface of two envelope proteins monomers, exposed at the surface of the mature virion. This "E-dimer-dependent epitope" (EDE), comprises the fusion loop of one monomer at the tip of domain II of E and a portion of the domains I and III of the adjacent monomer. Since this epitope largely overlaps with the binding site of the precursor membrane protein (prM) during Zika virion maturation, its molecular surface is evolutionary conserved in flaviviruses such as Dengue and Zika viruses, and can elicit antibodies that broadly neutralize various ZIKV strains. Here, we present a cryo-EM reconstruction at 4.1 Å resolution of the virion bound to the antigen binding fragment (Fab) of an antibody that targets this mutationally-constrained quaternary epitope. The Fab incompletely covers the surface of the virion as it does not bind next to its 5-fold icosahedral axes. The structure reveals details of the binding mode of this potent neutralizing class of antibodies and can inform the design of immunogens and vaccines targeting this conserved epitope.
History
DepositionJun 13, 2020-
Header (metadata) releaseJul 8, 2020-
Map releaseJul 8, 2020-
UpdateJul 29, 2020-
Current statusJul 29, 2020Processing site: PDBj / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.015
  • Imaged by UCSF Chimera
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  • Surface view colored by radius
  • Surface level: 0.015
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7cbp
  • Surface level: 0.015
  • Imaged by UCSF Chimera
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  • Simplified surface model + fitted atomic model
  • Atomic modelsPDB-7cbp
  • Imaged by Jmol
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_30337.png

Downloads & links

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Map

FileDownload / File: emd_30337.map.gz / Format: CCP4 / Size: 1.9 GB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.05 Å/pix.
x 798 pix.
= 833.91 Å		1.05 Å/pix.
x 798 pix.
= 833.91 Å		1.05 Å/pix.
x 798 pix.
= 833.91 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.045 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.015 / Movie #1: 0.015
Minimum - Maximum-0.039851796 - 0.08573224
Average (Standard dev.)0.00047128677 (±0.00345337)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions798798798
Spacing798798798
CellA=B=C: 833.91 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.0451.0451.045
M x/y/z798798798
origin x/y/z0.0000.0000.000
length x/y/z833.910833.910833.910
α/β/γ90.00090.00090.000
start NX/NY/NZ777686
NX/NY/NZ10710993
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS798798798
D min/max/mean-0.0400.0860.000

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Supplemental data

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Sample components

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Entire : Zika virus

EntireName: Zika virus
Components
  • Complex: Zika virus
    • Complex: Zika virus M and E proteins
      • Protein or peptide: Small envelope protein M
      • Protein or peptide: Envelope protein E
    • Complex: FAB
      • Protein or peptide: Fab Heavy chain
      • Protein or peptide: Fab light chain

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Supramolecule #1: Zika virus

SupramoleculeName: Zika virus / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all

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Supramolecule #2: Zika virus M and E proteins

SupramoleculeName: Zika virus M and E proteins / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1-#2
Source (natural)Organism: Zika virus

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Supramolecule #3: FAB

SupramoleculeName: FAB / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #3-#4
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Small envelope protein M

MacromoleculeName: Small envelope protein M / type: protein_or_peptide / ID: 1 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: ZIKV (virus)
Molecular weightTheoretical: 8.496883 KDa
SequenceString:
AVTLPSHSTR KLQTRSQTWL ESREYTKHLI RVENWIFRNP GFALAAAAIA WLLGSSTSQK VIYLVMILLI APAYS

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Macromolecule #2: Envelope protein E

MacromoleculeName: Envelope protein E / type: protein_or_peptide / ID: 2 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: ZIKV (virus)
Molecular weightTheoretical: 54.186762 KDa
SequenceString: IRCIGVSNRD FVEGMSGGTW VDVVLEHGGC VTVMAQDKPT VDIELVTTTV SNMAEVRSYC YEASISDMAS DSRCPTQGEA YLDKQSDTQ YVCKRTLVDR GWGNGCGLFG KGSLVTCAKF ACSKKMTGKS IQPENLEYRI MLSVHGSQHS GMIVNDTGHE T DENRAKVE ...String:
IRCIGVSNRD FVEGMSGGTW VDVVLEHGGC VTVMAQDKPT VDIELVTTTV SNMAEVRSYC YEASISDMAS DSRCPTQGEA YLDKQSDTQ YVCKRTLVDR GWGNGCGLFG KGSLVTCAKF ACSKKMTGKS IQPENLEYRI MLSVHGSQHS GMIVNDTGHE T DENRAKVE ITPNSPRAEA TLGGFGSLGL DCEPRTGLDF SDLYYLTMNN KHWLVHKEWF HDIPLPWHAG ADTGTPHWNN KE ALVEFKD AHAKRQTVVV LGSQEGAVHT ALAGALEAEM DGAKGRLSSG HLKCRLKMDK LRLKGVSYSL CTAAFTFTKI PAE TLHGTV TVEVQYAGTD GPCKVPAQMA VDMQTLTPVG RLITANPVIT ESTENSKMML ELDPPFGDSY IVIGVGEKKI THHW HRSGS TIGKAFEATV RGAKRMAVLG DTAWDFGSVG GALNSLGKGI HQIFGAAFKS LFGGMSWFSQ ILIGTLLMWL GLNTK NGSI SLMCLALGGV LIFLSTA

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Macromolecule #3: Fab Heavy chain

MacromoleculeName: Fab Heavy chain / type: protein_or_peptide / ID: 3 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 23.612326 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: EVQLLESGGG LVQPGGSLRL SCAASGFSFS TYSMHWVRQA PGKGLEWVSA ISGEGDSAYY ADSVKGRFTI SRDNSKNTLY LQMNKVRAE DTAVYYCVGG YSNFYYYYTM DAWGQGTMVT VSSASTKGPS VFPLAPSSKS TSGGTAALGC LVKDYFPEPV T VSWNSGAL ...String:
EVQLLESGGG LVQPGGSLRL SCAASGFSFS TYSMHWVRQA PGKGLEWVSA ISGEGDSAYY ADSVKGRFTI SRDNSKNTLY LQMNKVRAE DTAVYYCVGG YSNFYYYYTM DAWGQGTMVT VSSASTKGPS VFPLAPSSKS TSGGTAALGC LVKDYFPEPV T VSWNSGAL TSGVHTFPAV LQSSGLYSLS SVVTVPSSSL GTQTYICNVN HKPSNTKVDK KVEP

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Macromolecule #4: Fab light chain

MacromoleculeName: Fab light chain / type: protein_or_peptide / ID: 4 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 23.818539 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: DIVMTQSPAS LSLSPGERAT LSCRATQSIS TFLAWYQQKP GQAPRLLIYD ASTRASGIPA RFSGSRSGTD FTLTITRLEP EDFAVYYCQ QRYNWPPYSF GQGTKLEIKR TVAAPSVFIF PPSDEQLKSG TASVVCLLNN FYPREAKVQW KVDNALQSGN S QESVTEQD ...String:
DIVMTQSPAS LSLSPGERAT LSCRATQSIS TFLAWYQQKP GQAPRLLIYD ASTRASGIPA RFSGSRSGTD FTLTITRLEP EDFAVYYCQ QRYNWPPYSF GQGTKLEIKR TVAAPSVFIF PPSDEQLKSG TASVVCLLNN FYPREAKVQW KVDNALQSGN S QESVTEQD SKDSTYSLSS TLTLSKADYE KHKVYACEVT HQGLSSPVTK SFNRGEC

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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 TITAN KRIOS
Image recordingFilm or detector model: FEI FALCON II (4k x 4k) / Average electron dose: 48.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Final reconstructionResolution.type: BY AUTHOR / Resolution: 4.1 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 4610
Initial angle assignmentType: OTHER
Final angle assignmentType: OTHER

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