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- EMDB-30196: Cryo-EM structure of Dengue virus serotype 2 complexed with Fab S... -

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Entry
Database: EMDB / ID: EMD-30196
TitleCryo-EM structure of Dengue virus serotype 2 complexed with Fab SIgN-3C at pH 5.0
Map dataCryo-EM structure of Dengue virus serotype 2 complexed with Fab SIgN-3C at pH 5.0
Sample
  • Complex: Complex of Dengue virus serotype 2 with SIgN-3C Fab
    • Complex: SIgN-3C Fab
      • Protein or peptide: SIgN-3C Fab heavy chain
      • Protein or peptide: SIgN-3C Fab light chain
    • Complex: Dengue virus serotype 2
      • Protein or peptide: Dengue serotype 2 E protein ectodomain
Keywordsantibody / neutralization / VIRUS
Function / homology
Function and homology information


symbiont-mediated suppression of host JAK-STAT cascade via inhibition of host TYK2 activity / host cell mitochondrion / symbiont-mediated suppression of host JAK-STAT cascade via inhibition of STAT2 activity / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MAVS activity / ribonucleoside triphosphate phosphatase activity / double-stranded RNA binding / channel activity / viral capsid / monoatomic ion transmembrane transport / clathrin-dependent endocytosis of virus by host cell ...symbiont-mediated suppression of host JAK-STAT cascade via inhibition of host TYK2 activity / host cell mitochondrion / symbiont-mediated suppression of host JAK-STAT cascade via inhibition of STAT2 activity / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MAVS activity / ribonucleoside triphosphate phosphatase activity / double-stranded RNA binding / channel activity / viral capsid / monoatomic ion transmembrane transport / clathrin-dependent endocytosis of virus by host cell / mRNA (nucleoside-2'-O-)-methyltransferase activity / mRNA 5'-cap (guanine-N7-)-methyltransferase activity / RNA helicase activity / protein dimerization activity / host cell endoplasmic reticulum membrane / symbiont-mediated suppression of host type I interferon-mediated signaling pathway / induction by virus of host autophagy / viral RNA genome replication / serine-type endopeptidase activity / RNA-dependent RNA polymerase activity / virus-mediated perturbation of host defense response / fusion of virus membrane with host endosome membrane / viral envelope / host cell nucleus / virion attachment to host cell / structural molecule activity / virion membrane / proteolysis / extracellular region / ATP binding / membrane / metal ion binding
Similarity search - Function
Flavivirus capsid protein C superfamily / Flavivirus non-structural protein NS2B / Genome polyprotein, Flavivirus / : / mRNA cap 0/1 methyltransferase / mRNA cap 0 and cap 1 methyltransferase (EC 2.1.1.56 and EC 2.1.1.57) domain profile. / Flavivirus non-structural protein NS4A / Flavivirus non-structural protein NS2B / Flavivirus capsid protein C / Flavivirus non-structural protein NS4B ...Flavivirus capsid protein C superfamily / Flavivirus non-structural protein NS2B / Genome polyprotein, Flavivirus / : / mRNA cap 0/1 methyltransferase / mRNA cap 0 and cap 1 methyltransferase (EC 2.1.1.56 and EC 2.1.1.57) domain profile. / Flavivirus non-structural protein NS4A / Flavivirus non-structural protein NS2B / Flavivirus capsid protein C / Flavivirus non-structural protein NS4B / Flavivirus capsid protein C / Flavivirus non-structural protein NS4B / Flavivirus non-structural protein NS4A / Flavivirus NS2B domain profile. / Flavivirus non-structural protein NS2A / Flavivirus non-structural protein NS2A / RNA-directed RNA polymerase, thumb domain, Flavivirus / Flavivirus RNA-directed RNA polymerase, thumb domain / Flavivirus NS3, petidase S7 / Peptidase S7, Flavivirus NS3 serine protease / Flavivirus NS3 protease (NS3pro) domain profile. / RNA-directed RNA polymerase, flavivirus / Flavivirus RNA-directed RNA polymerase, fingers and palm domains / Flavivirus non-structural Protein NS1 / Flavivirus non-structural protein NS1 / Envelope glycoprotein M, flavivirus / Envelope glycoprotein M superfamily, flavivirus / Flavivirus polyprotein propeptide / Flavivirus polyprotein propeptide superfamily / Flavivirus polyprotein propeptide / Flavivirus envelope glycoprotein M / Flavivirus envelope glycoprotein E, stem/anchor domain / Flavivirus envelope glycoprotein E, Stem/Anchor domain / Flavivirus envelope glycoprotein E, Stem/Anchor domain superfamily / Flavivirus glycoprotein E, immunoglobulin-like domain / : / Flavivirus glycoprotein central and dimerisation domain / Flaviviral glycoprotein E, central domain, subdomain 1 / Flaviviral glycoprotein E, central domain, subdomain 2 / Flavivirus NS3 helicase, C-terminal helical domain / Flavivirus glycoprotein, immunoglobulin-like domain / Flavivirus glycoprotein, central and dimerisation domains / Ribosomal RNA methyltransferase, FtsJ domain / FtsJ-like methyltransferase / Flavivirus/Alphavirus glycoprotein, immunoglobulin-like domain superfamily / Flavivirus glycoprotein, central and dimerisation domain superfamily / Flaviviral glycoprotein E, dimerisation domain / DEAD box, Flavivirus / Flavivirus DEAD domain / helicase superfamily c-terminal domain / Immunoglobulin E-set / Superfamilies 1 and 2 helicase C-terminal domain profile. / Superfamilies 1 and 2 helicase ATP-binding type-1 domain profile. / DEAD-like helicases superfamily / Helicase, C-terminal / Helicase superfamily 1/2, ATP-binding domain / RNA-directed RNA polymerase, catalytic domain / RdRp of positive ssRNA viruses catalytic domain profile. / S-adenosyl-L-methionine-dependent methyltransferase superfamily / 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 speciesHomo sapiens (human) / Dengue virus 2
Methodsingle particle reconstruction / cryo EM / Resolution: 7.8 Å
AuthorsZhang S / Chew SV
Funding support Singapore, 2 items
OrganizationGrant numberCountry
National Research Foundation (NRF, Singapore)NRF-NRFI2016-01 Singapore
National Research Foundation (NRF, Singapore)NRF2016NRF-CRP001-063 Singapore
CitationJournal: Cell Rep / Year: 2020
Title: A Human Antibody Neutralizes Different Flaviviruses by Using Different Mechanisms.
Authors: Shuijun Zhang / Thomas Loy / Thiam-Seng Ng / Xin-Ni Lim / Shyn-Yun Valerie Chew / Ter Yong Tan / Meihui Xu / Victor A Kostyuchenko / Farhana Tukijan / Jian Shi / Katja Fink / Shee-Mei Lok /
Abstract: Human antibody SIgN-3C neutralizes dengue virus (DENV) and Zika virus (ZIKV) differently. DENV:SIgN-3C Fab and ZIKV:SIgN-3C Fab cryoelectron microscopy (cryo-EM) complex structures show Fabs ...Human antibody SIgN-3C neutralizes dengue virus (DENV) and Zika virus (ZIKV) differently. DENV:SIgN-3C Fab and ZIKV:SIgN-3C Fab cryoelectron microscopy (cryo-EM) complex structures show Fabs crosslink E protein dimers at extracellular pH 8.0 condition and also when further incubated at acidic endosomal conditions (pH 8.0-6.5). We observe Fab binding to DENV (pH 8.0-5.0) prevents virus fusion, and the number of bound Fabs increase (from 120 to 180). For ZIKV, although there are already 180 copies of Fab at pH 8.0, virus structural changes at pH 5.0 are not inhibited. The immunoglobulin G (IgG):DENV structure at pH 8.0 shows both Fab arms bind to epitopes around the 2-fold vertex. On ZIKV, an additional Fab around the 5-fold vertex at pH 8.0 suggests one IgG arm would engage with an epitope, although the other may bind to other viruses, causing aggregation. For DENV2 at pH 5.0, a similar scenario would occur, suggesting DENV2:IgG complex would aggregate in the endosome. Hence, a single antibody employs different neutralization mechanisms against different flaviviruses.
History
DepositionApr 6, 2020-
Header (metadata) releaseMay 13, 2020-
Map releaseMay 13, 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: 3
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  • Surface view colored by radius
  • Surface level: 3
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  • Surface view with fitted model
  • Atomic models: PDB-7bue
  • Surface level: 3
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  • Simplified surface model + fitted atomic model
  • Atomic modelsPDB-7bue
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_30196.png

Downloads & links

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Map

FileDownload / File: emd_30196.map.gz / Format: CCP4 / Size: 290.8 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationCryo-EM structure of Dengue virus serotype 2 complexed with Fab SIgN-3C at pH 5.0
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.71 Å/pix.
x 424 pix.
= 725.04 Å		1.71 Å/pix.
x 424 pix.
= 725.04 Å		1.71 Å/pix.
x 424 pix.
= 725.04 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.71 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 3.0 / Movie #1: 3
Minimum - Maximum-3.0681076 - 7.480652
Average (Standard dev.)-0.000000000856349 (±1.0)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin-212-212-212
Dimensions424424424
Spacing424424424
CellA=B=C: 725.04004 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.711.711.71
M x/y/z424424424
origin x/y/z0.0000.0000.000
length x/y/z725.040725.040725.040
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS-212-212-212
NC/NR/NS424424424
D min/max/mean-3.0687.481-0.000

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Supplemental data

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Sample components

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Entire : Complex of Dengue virus serotype 2 with SIgN-3C Fab

EntireName: Complex of Dengue virus serotype 2 with SIgN-3C Fab
Components
  • Complex: Complex of Dengue virus serotype 2 with SIgN-3C Fab
    • Complex: SIgN-3C Fab
      • Protein or peptide: SIgN-3C Fab heavy chain
      • Protein or peptide: SIgN-3C Fab light chain
    • Complex: Dengue virus serotype 2
      • Protein or peptide: Dengue serotype 2 E protein ectodomain

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Supramolecule #1: Complex of Dengue virus serotype 2 with SIgN-3C Fab

SupramoleculeName: Complex of Dengue virus serotype 2 with SIgN-3C Fab / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)

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Supramolecule #2: SIgN-3C Fab

SupramoleculeName: SIgN-3C Fab / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1-#2
Source (natural)Organism: Dengue virus 2

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Supramolecule #3: Dengue virus serotype 2

SupramoleculeName: Dengue virus serotype 2 / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #3

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Macromolecule #1: SIgN-3C Fab heavy chain

MacromoleculeName: SIgN-3C Fab heavy chain / type: protein_or_peptide / ID: 1 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 14.448958 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString:
EVQLVQSGPD VEKPGASVKV SCKASGYTFT SNYIHWVRQA PGQGLEWMGV INPRGGSTAS AQKFQGRITM TRDTSTSTVY MELSSLRSD DTAVYYCARG GRALFYDSYT TPRDGGSWWF DPWGQGSLVT VSS

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Macromolecule #2: SIgN-3C Fab light chain

MacromoleculeName: SIgN-3C Fab light chain / type: protein_or_peptide / ID: 2 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 11.832145 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString:
DIQLTQSPSS LSASVGDRVT FTCQASQDIR KYLNWYQQKP GKAPKLLIYD ASNLKTGVPS RFSGSGSGTD FTFTISSLQP EDVATYYCQ QFDDLPITFG QGTRLQIK

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Macromolecule #3: Dengue serotype 2 E protein ectodomain

MacromoleculeName: Dengue serotype 2 E protein ectodomain / type: protein_or_peptide / ID: 3 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Dengue virus 2
Molecular weightTheoretical: 43.691195 KDa
SequenceString: MRCIGISNRD FVEGVSGGSW VDIVLEHGSC VTTMAKNKPT LDFELIKTEA KHPATLRKYC VEAKLTNTTT ASRCPTQGEP SLNEEQDKR FVCKHSMVDR GWGNGCGLFG KGGIVTCAMF TCKKNMEGKV VQPENLEYTI VITPHSGEEN AVGNDTGKHG K EIKVTPQS ...String:
MRCIGISNRD FVEGVSGGSW VDIVLEHGSC VTTMAKNKPT LDFELIKTEA KHPATLRKYC VEAKLTNTTT ASRCPTQGEP SLNEEQDKR FVCKHSMVDR GWGNGCGLFG KGGIVTCAMF TCKKNMEGKV VQPENLEYTI VITPHSGEEN AVGNDTGKHG K EIKVTPQS SITEAELTGY GTVTMECSPR TGLDFNEMVL LQMENKAWLV HRQWFLDLPL PWLPGADTQG SNWIQKETLV TF KNPHAKK QDVVVLGSQE GAMHTALTGA TEIQMSSGNL LFTGHLKCRL RMDKLQLKGM SYSMCTGKFK VVKEIAETQH GTI VIRVQY EGDGSPCKIP FEIMDLEKRH VLGRLITVNP IVTEKDSPVN IEAEPPFGDS YIIIGVEPGQ LKLSWFKK

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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: 20.0 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

Startup modelType of model: EMDB MAP
Final reconstructionAlgorithm: FOURIER SPACE / Resolution.type: BY AUTHOR / Resolution: 7.8 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 8181
Initial angle assignmentType: PROJECTION MATCHING
Final angle assignmentType: PROJECTION MATCHING

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