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- EMDB-8791: MERS S ectodomain trimer in complex with Fab of neutralizing anti... -

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Basic information

Entry
Database: EMDB / ID: EMD-8791
TitleMERS S ectodomain trimer in complex with Fab of neutralizing antibody G4
Map dataMERS S ectodomain trimer in complex with variable domain of neutralizing antibody G4
Sample
  • Complex: MERS S ectodomain trimer in complex with Fab of neutralizing antibody G4
    • Protein or peptide: Spike glycoproteinSpike protein
    • Protein or peptide: G4 VH
    • Protein or peptide: G4 VL
Function / homology
Function and homology information


endocytosis involved in viral entry into host cell / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / membrane fusion / positive regulation of viral entry into host cell / receptor-mediated virion attachment to host cell / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / host cell plasma membrane / virion membrane / membrane
Similarity search - Function
Spike (S) protein S1 subunit, receptor-binding domain, MERS-CoV / Spike (S) protein S1 subunit, N-terminal domain, MERS-CoV-like / Spike glycoprotein S2, coronavirus, C-terminal / Coronavirus spike glycoprotein S2, intravirion / Betacoronavirus spike (S) glycoprotein S1 subunit N-terminal (NTD) domain profile. / Spike glycoprotein, N-terminal domain superfamily / Betacoronavirus spike (S) glycoprotein S1 subunit C-terminal (CTD) domain profile. / Spike glycoprotein, betacoronavirus / Spike (S) protein S1 subunit, receptor-binding domain, betacoronavirus / Spike S1 subunit, receptor binding domain superfamily, betacoronavirus ...Spike (S) protein S1 subunit, receptor-binding domain, MERS-CoV / Spike (S) protein S1 subunit, N-terminal domain, MERS-CoV-like / Spike glycoprotein S2, coronavirus, C-terminal / Coronavirus spike glycoprotein S2, intravirion / Betacoronavirus spike (S) glycoprotein S1 subunit N-terminal (NTD) domain profile. / Spike glycoprotein, N-terminal domain superfamily / Betacoronavirus spike (S) glycoprotein S1 subunit C-terminal (CTD) domain profile. / Spike glycoprotein, betacoronavirus / Spike (S) protein S1 subunit, receptor-binding domain, betacoronavirus / Spike S1 subunit, receptor binding domain superfamily, betacoronavirus / Betacoronavirus spike glycoprotein S1, receptor binding / Spike glycoprotein S1, N-terminal domain, betacoronavirus-like / Betacoronavirus-like spike glycoprotein S1, N-terminal / Spike glycoprotein S2, coronavirus, heptad repeat 1 / Spike glycoprotein S2, coronavirus, heptad repeat 2 / Coronavirus spike (S) glycoprotein S2 subunit heptad repeat 2 (HR2) region profile. / Coronavirus spike (S) glycoprotein S2 subunit heptad repeat 1 (HR1) region profile. / Spike glycoprotein S2 superfamily, coronavirus / Spike glycoprotein S2, coronavirus / Coronavirus spike glycoprotein S2 / Coronavirus spike glycoprotein S1, C-terminal / Coronavirus spike glycoprotein S1, C-terminal
Similarity search - Domain/homology
Spike glycoprotein / Spike glycoprotein
Similarity search - Component
Biological speciesMiddle East respiratory syndrome-related coronavirus / Mus musculus (house mouse)
Methodsingle particle reconstruction / cryo EM / Resolution: 4.0 Å
AuthorsPallesen J / Ward AB
Funding support United States, 2 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)P20GM113132 United States
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)R01AI127521 United States
CitationJournal: Proc Natl Acad Sci U S A / Year: 2017
Title: Immunogenicity and structures of a rationally designed prefusion MERS-CoV spike antigen.
Authors: Jesper Pallesen / Nianshuang Wang / Kizzmekia S Corbett / Daniel Wrapp / Robert N Kirchdoerfer / Hannah L Turner / Christopher A Cottrell / Michelle M Becker / Lingshu Wang / Wei Shi / Wing- ...Authors: Jesper Pallesen / Nianshuang Wang / Kizzmekia S Corbett / Daniel Wrapp / Robert N Kirchdoerfer / Hannah L Turner / Christopher A Cottrell / Michelle M Becker / Lingshu Wang / Wei Shi / Wing-Pui Kong / Erica L Andres / Arminja N Kettenbach / Mark R Denison / James D Chappell / Barney S Graham / Andrew B Ward / Jason S McLellan /
Abstract: Middle East respiratory syndrome coronavirus (MERS-CoV) is a lineage C betacoronavirus that since its emergence in 2012 has caused outbreaks in human populations with case-fatality rates of ∼36%. ...Middle East respiratory syndrome coronavirus (MERS-CoV) is a lineage C betacoronavirus that since its emergence in 2012 has caused outbreaks in human populations with case-fatality rates of ∼36%. As in other coronaviruses, the spike (S) glycoprotein of MERS-CoV mediates receptor recognition and membrane fusion and is the primary target of the humoral immune response during infection. Here we use structure-based design to develop a generalizable strategy for retaining coronavirus S proteins in the antigenically optimal prefusion conformation and demonstrate that our engineered immunogen is able to elicit high neutralizing antibody titers against MERS-CoV. We also determined high-resolution structures of the trimeric MERS-CoV S ectodomain in complex with G4, a stem-directed neutralizing antibody. The structures reveal that G4 recognizes a glycosylated loop that is variable among coronaviruses and they define four conformational states of the trimer wherein each receptor-binding domain is either tightly packed at the membrane-distal apex or rotated into a receptor-accessible conformation. Our studies suggest a potential mechanism for fusion initiation through sequential receptor-binding events and provide a foundation for the structure-based design of coronavirus vaccines.
History
DepositionJun 23, 2017-
Header (metadata) releaseJul 19, 2017-
Map releaseAug 16, 2017-
UpdateDec 2, 2020-
Current statusDec 2, 2020Processing site: RCSB / 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 cylindrical radius
  • Surface level: 0.015
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-5w9p
  • Surface level: 0.015
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

Downloads & links

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Map

FileDownload / File: emd_8791.map.gz / Format: CCP4 / Size: 107.2 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationMERS S ectodomain trimer in complex with variable domain of neutralizing antibody G4
Voxel sizeX=Y=Z: 1.02 Å
Density
Contour LevelBy AUTHOR: 0.015 / Movie #1: 0.015
Minimum - Maximum-0.041603435 - 0.08884141
Average (Standard dev.)0.0000511335 (±0.0036671804)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions304304304
Spacing304304304
CellA=B=C: 310.08 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.021.021.02
M x/y/z304304304
origin x/y/z0.0000.0000.000
length x/y/z310.080310.080310.080
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS304304304
D min/max/mean-0.0420.0890.000

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Supplemental data

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Half map: MERS S ectodomain trimer in complex with variable...

Fileemd_8791_half_map_1.map
AnnotationMERS S ectodomain trimer in complex with variable domain of neutralizing antibody G4
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Half map: MERS S ectodomain trimer in complex with variable...

Fileemd_8791_half_map_2.map
AnnotationMERS S ectodomain trimer in complex with variable domain of neutralizing antibody G4
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Sample components

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Entire : MERS S ectodomain trimer in complex with Fab of neutralizing anti...

EntireName: MERS S ectodomain trimer in complex with Fab of neutralizing antibody G4
Components
  • Complex: MERS S ectodomain trimer in complex with Fab of neutralizing antibody G4
    • Protein or peptide: Spike glycoproteinSpike protein
    • Protein or peptide: G4 VH
    • Protein or peptide: G4 VL

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Supramolecule #1: MERS S ectodomain trimer in complex with Fab of neutralizing anti...

SupramoleculeName: MERS S ectodomain trimer in complex with Fab of neutralizing antibody G4
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#4
Source (natural)Organism: Middle East respiratory syndrome-related coronavirus
Molecular weightTheoretical: 600 KDa

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Macromolecule #1: Spike glycoprotein

MacromoleculeName: Spike glycoprotein / type: protein_or_peptide / ID: 1 / Number of copies: 6 / Enantiomer: LEVO
Source (natural)Organism: Middle East respiratory syndrome-related coronavirus
Molecular weightTheoretical: 146.325969 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MIHSVFLLMF LLTPTESYVD VGPDSVKSAC IEVDIQQTFF DKTWPRPIDV SKADGIIYPQ GRTYSNITIT YQGLFPYQGD HGDMYVYSA GHATGTTPQK LFVANYSQDV KQFANGFVVR IGAAANSTGT VIISPSTSAT IRKIYPAFML GSSVGNFSDG K MGRFFNHT ...String:
MIHSVFLLMF LLTPTESYVD VGPDSVKSAC IEVDIQQTFF DKTWPRPIDV SKADGIIYPQ GRTYSNITIT YQGLFPYQGD HGDMYVYSA GHATGTTPQK LFVANYSQDV KQFANGFVVR IGAAANSTGT VIISPSTSAT IRKIYPAFML GSSVGNFSDG K MGRFFNHT LVLLPDGCGT LLRAFYCILE PRSGNHCPAG NSYTSFATYH TPATDCSDGN YNRNASLNSF KEYFNLRNCT FM YTYNITE DEILEWFGIT QTAQGVHLFS SRYVDLYGGN MFQFATLPVY DTIKYYSIIP HSIRSIQSDR KAWAAFYVYK LQP LTFLLD FSVDGYIRRA IDCGFNDLSQ LHCSYESFDV ESGVYSVSSF EAKPSGSVVE QAEGVECDFS PLLSGTPPQV YNFK RLVFT NCNYNLTKLL SLFSVNDFTC SQISPAAIAS NCYSSLILDY FSYPLSMKSD LSVSSAGPIS QFNYKQSFSN PTCLI LATV PHNLTTITKP LKYSYINKCS RFLSDDRTEV PQLVNANQYS PCVSIVPSTV WEDGDYYRKQ LSPLEGGGWL VASGST VAM TEQLQMGFGI TVQYGTDTNS VCPKLEFAND TKIASQLGNC VEYSLYGVSG RGVFQNCTAV GVRQQRFVYD AYQNLVG YY SDDGNYYCLR ACVSVPVSVI YDKETKTHAT LFGSVACEHI SSTMSQYSRS TRSMLKRRDS TYGPLQTPVG CVLGLVNS S LFVEDCKLPL GQSLCALPDT PSTLTPASVG SVPGEMRLAS IAFNHPIQVD QLNSSYFKLS IPTNFSFGVT QEYIQTTIQ KVTVDCKQYV CNGFQKCEQL LREYGQFCSK INQALHGANL RQDDSVRNLF ASVKSSQSSP IIPGFGGDFN LTLLEPVSIS TGSRSARSA IEDLLFDKVT IADPGYMQGY DDCMQQGPAS ARDLICAQYV AGYKVLPPLM DVNMEAAYTS SLLGSIAGVG W TAGLSSFA AIPFAQSIFY RLNGVGITQQ VLSENQKLIA NKFNQALGAM QTGFTTTNEA FHKVQDAVNN NAQALSKLAS EL SNTFGAI SASIGDIIQR LDPPEQDAQI DRLINGRLTT LNAFVAQQLV RSESAALSAQ LAKDKVNECV KAQSKRSGFC GQG THIVSF VVNAPNGLYF MHVGYYPSNH IEVVSAYGLC DAANPTNCIA PVNGYFIKTN NTRIVDEWSY TGSSFYAPEP ITSL NTKYV APQVTYQNIS TNLPPPLLGN STGIDFQDEL DEFFKNVSTS IPNFGSLTQI NTTLLDLTYE MLSLQQVVKA LNESY IDLK ELGNYTYGSG YIPEAPRDGQ AYVRKDGEWV LLSTFLGRSL EVLFQ

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Macromolecule #2: G4 VH

MacromoleculeName: G4 VH / type: protein_or_peptide / ID: 2 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 25.312352 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: QVQLQQSGPE LVRPGVSVKI SCKGSGYTFT DYAIHWVKQS HAKSLEWIGV FSTYYGNTNY NQKFKGRATM TVDKSSSTAY MELARLTSE DSAIYYCARK SYYVDYVDAM DYWGQGTSVT VSSASTTPPS VYPLAPGSAA QTNSMVTLGC LVKGYFPEPV T VTWNSGSL ...String:
QVQLQQSGPE LVRPGVSVKI SCKGSGYTFT DYAIHWVKQS HAKSLEWIGV FSTYYGNTNY NQKFKGRATM TVDKSSSTAY MELARLTSE DSAIYYCARK SYYVDYVDAM DYWGQGTSVT VSSASTTPPS VYPLAPGSAA QTNSMVTLGC LVKGYFPEPV T VTWNSGSL SSGVHTFPAV LQSDLYTLSS SVTVPSSTWP SETVTCNVAH PASSTKVDKK IVPRDCGKGL EVLFQ

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Macromolecule #3: G4 VL

MacromoleculeName: G4 VL / type: protein_or_peptide / ID: 3 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 23.867367 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: DIVLTQSPAS LAVSLGQRAT ISCRASESVD NYGISFMNWF QQKPGQPPKL LISATSNQGS GVPARFIGSG SGTDFSLNIH PVEEDDTAM YFCQQSKEVP RTFGGGTKLE IKRTDAAPTV SIFPPSSEQL TSGGASVVCF LNNFYPKDIN VKWKIDGSER Q NGVLNSWT ...String:
DIVLTQSPAS LAVSLGQRAT ISCRASESVD NYGISFMNWF QQKPGQPPKL LISATSNQGS GVPARFIGSG SGTDFSLNIH PVEEDDTAM YFCQQSKEVP RTFGGGTKLE IKRTDAAPTV SIFPPSSEQL TSGGASVVCF LNNFYPKDIN VKWKIDGSER Q NGVLNSWT DQDSKDSTYS MSSTLTLTKD EYERHNSYTC EATHKTSTSP IVKSFNRNEC

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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

Concentration1 mg/mL
BufferpH: 7.4 / Component - Name: TBS
GridModel: C-flat / Material: COPPER / Mesh: 400 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: PLASMA CLEANING / Pretreatment - Atmosphere: OTHER
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 opticsC2 aperture diameter: 70.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Cs: 2.7 mm / Nominal defocus max: 2.5 µm / Nominal defocus min: 0.7 µm / Nominal magnification: 29000
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Digitization - Sampling interval: 5.0 µm / Digitization - Frames/image: 1-35 / Number grids imaged: 1 / Average exposure time: 0.2 sec. / Average electron dose: 1.89 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 37180
CTF correctionSoftware - Name: CTFFIND3
Startup modelType of model: OTHER / Details: negative stain reconstruction.
Initial angle assignmentType: PROJECTION MATCHING / Software - Name: RELION (ver. 1.4)
Final 3D classificationSoftware - Name: RELION (ver. 1.4)
Final angle assignmentType: PROJECTION MATCHING / Software - Name: RELION (ver. 1.4)
Final reconstructionApplied symmetry - Point group: C3 (3 fold cyclic) / Resolution.type: BY AUTHOR / Resolution: 4.0 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 1.4) / Number images used: 11218
FSC plot (resolution estimation)

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Atomic model buiding 1

RefinementSpace: REAL / Protocol: OTHER
Output model

PDB-5w9p:
MERS S ectodomain trimer in complex with variable domain of neutralizing antibody G4

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