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- EMDB-30192: Cryo-EM structure of zika virus complexed with Fab SIgN-3C at pH 6.5 -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-30192 | |||||||||
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Title | Cryo-EM structure of zika virus complexed with Fab SIgN-3C at pH 6.5 | |||||||||
![]() | Cryo-EM structure of zika virus complexed with Fab SIgN-3C at pH 6.5 | |||||||||
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Function / homology | ![]() symbiont-mediated suppression of host JAK-STAT cascade via inhibition of host TYK2 activity / flavivirin / symbiont-mediated suppression of host JAK-STAT cascade via inhibition of STAT2 activity / symbiont-mediated suppression of host JAK-STAT cascade via inhibition of STAT1 activity / negative regulation of innate immune response / viral capsid / double-stranded RNA binding / nucleoside-triphosphate phosphatase / 4 iron, 4 sulfur cluster binding / mRNA (guanine-N7)-methyltransferase ...symbiont-mediated suppression of host JAK-STAT cascade via inhibition of host TYK2 activity / flavivirin / symbiont-mediated suppression of host JAK-STAT cascade via inhibition of STAT2 activity / symbiont-mediated suppression of host JAK-STAT cascade via inhibition of STAT1 activity / negative regulation of innate immune response / viral capsid / double-stranded RNA binding / nucleoside-triphosphate phosphatase / 4 iron, 4 sulfur cluster binding / mRNA (guanine-N7)-methyltransferase / methyltransferase cap1 / clathrin-dependent endocytosis of virus by host cell / mRNA (nucleoside-2'-O-)-methyltransferase activity / mRNA 5'-cap (guanine-N7-)-methyltransferase activity / molecular adaptor activity / RNA helicase activity / host cell perinuclear region of cytoplasm / host cell endoplasmic reticulum membrane / protein dimerization activity / symbiont-mediated suppression of host type I interferon-mediated signaling pathway / RNA helicase / induction by virus of host autophagy / serine-type endopeptidase activity / RNA-directed RNA polymerase / viral RNA genome replication / virus-mediated perturbation of host defense response / RNA-dependent RNA polymerase activity / centrosome / fusion of virus membrane with host endosome membrane / lipid binding / viral envelope / host cell nucleus / virion attachment to host cell / GTP binding / structural molecule activity / virion membrane / ATP hydrolysis activity / proteolysis / extracellular region / ATP binding / membrane / metal ion binding Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.8 Å | |||||||||
![]() | Zhang S / Chew SV / Lim XN / Ng TS / Kostyuchenko VA / Lok SM | |||||||||
Funding support | ![]()
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![]() | ![]() 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 |
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Structure visualization
Movie |
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 468.9 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 14.5 KB 14.5 KB | Display Display | ![]() |
Images | ![]() | 281.4 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 622.7 KB | Display | ![]() |
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Full document | ![]() | 622.3 KB | Display | |
Data in XML | ![]() | 8.2 KB | Display | |
Data in CIF | ![]() | 9.5 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7bu8MC ![]() 7buaC ![]() 7bubC ![]() 7budC ![]() 7bueC ![]() 7bufC M: atomic model generated by this map C: citing same article ( |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
File | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | Cryo-EM structure of zika virus complexed with Fab SIgN-3C at pH 6.5 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.34 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
-Entire : Complex of Zika virus with SIgN-3C Fab
Entire | Name: Complex of Zika virus with SIgN-3C Fab |
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Components |
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-Supramolecule #1: Complex of Zika virus with SIgN-3C Fab
Supramolecule | Name: Complex of Zika virus with SIgN-3C Fab / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#4 |
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Source (natural) | Organism: ![]() |
-Supramolecule #2: Zika virus
Supramolecule | Name: Zika virus / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1-#2 |
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Source (natural) | Organism: ![]() |
-Supramolecule #3: SIgN-3C Fab
Supramolecule | Name: SIgN-3C Fab / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #3-#4 |
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-Macromolecule #1: Genome polyprotein
Macromolecule | Name: Genome polyprotein / type: protein_or_peptide / ID: 1 / Number of copies: 3 / Enantiomer: LEVO / EC number: flavivirin |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 54.444051 KDa |
Sequence | String: 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 LIFLSTAVSA |
-Macromolecule #2: Zika virus M protein
Macromolecule | Name: Zika virus M protein / type: protein_or_peptide / ID: 2 / Number of copies: 3 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 8.496883 KDa |
Sequence | String: AVTLPSHSTR KLQTRSQTWL ESREYTKHLI RVENWIFRNP GFALAAAAIA WLLGSSTSQK VIYLVMILLI APAYS |
-Macromolecule #3: SIgN-3C Fab heavy chain
Macromolecule | Name: SIgN-3C Fab heavy chain / type: protein_or_peptide / ID: 3 / Number of copies: 3 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 14.448958 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: EVQLVQSGPD VEKPGASVKV SCKASGYTFT SNYIHWVRQA PGQGLEWMGV INPRGGSTAS AQKFQGRITM TRDTSTSTVY MELSSLRSD DTAVYYCARG GRALFYDSYT TPRDGGSWWF DPWGQGSLVT VSS |
-Macromolecule #4: SIgN-3C Fab light chain
Macromolecule | Name: SIgN-3C Fab light chain / type: protein_or_peptide / ID: 4 / Number of copies: 3 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 11.832145 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: DIQLTQSPSS LSASVGDRVT FTCQASQDIR KYLNWYQQKP GKAPKLLIYD ASNLKTGVPS RFSGSGSGTD FTFTISSLQP EDVATYYCQ QFDDLPITFG QGTRLQIK |
-Macromolecule #5: 2-acetamido-2-deoxy-beta-D-glucopyranose
Macromolecule | Name: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 5 / Number of copies: 3 / Formula: NAG |
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Molecular weight | Theoretical: 221.208 Da |
Chemical component information | ![]() ChemComp-NAG: |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 6.5 |
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Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: FEI FALCON II (4k x 4k) / Average electron dose: 30.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 3.8 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 16300 |
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Initial angle assignment | Type: PROJECTION MATCHING |
Final angle assignment | Type: PROJECTION MATCHING |