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- PDB-5w9n: MERS S ectodomain trimer in complex with variable domain of neutr... -

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Basic information

Entry
Database: PDB / ID: 5w9n
TitleMERS S ectodomain trimer in complex with variable domain of neutralizing antibody G4
Components
  • G4 VH
  • G4 VL
  • MERS S
KeywordsVIRAL PROTEIN / Immunogen / peplomer / viral spike / MERS / MERS S protein / antibody / G4
Function / homology
Function and homology information


membrane fusion / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / positive regulation of viral entry into host cell / receptor-mediated virion attachment to host cell / endocytosis involved in viral entry into 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 / Coronavirus spike glycoprotein S1, C-terminal / Coronavirus spike glycoprotein S1, C-terminal / Spike glycoprotein, betacoronavirus / Spike glycoprotein, N-terminal domain superfamily / Betacoronavirus spike (S) glycoprotein S1 subunit N-terminal (NTD) domain profile. / Betacoronavirus spike (S) glycoprotein S1 subunit C-terminal (CTD) domain profile. ...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 / Coronavirus spike glycoprotein S1, C-terminal / Coronavirus spike glycoprotein S1, C-terminal / Spike glycoprotein, betacoronavirus / Spike glycoprotein, N-terminal domain superfamily / Betacoronavirus spike (S) glycoprotein S1 subunit N-terminal (NTD) domain profile. / Betacoronavirus spike (S) glycoprotein S1 subunit C-terminal (CTD) domain profile. / 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 1 (HR1) region profile. / Coronavirus spike (S) glycoprotein S2 subunit heptad repeat 2 (HR2) region profile. / Spike glycoprotein S2 superfamily, coronavirus / Spike glycoprotein S2, coronavirus / Coronavirus spike glycoprotein S2
Similarity search - Domain/homology
Spike glycoprotein / Spike glycoprotein
Similarity search - Component
Biological speciesMiddle East respiratory syndrome-related coronavirus
Mus musculus (house mouse)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 5 Å
AuthorsPallesen, J. / Ward, A.B.
Funding support United States, 2items
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, 2017Deposition site: RCSB / Processing site: RCSB
Revision 1.0Aug 16, 2017Provider: repository / Type: Initial release
Revision 1.1Aug 30, 2017Group: Database references / Category: citation / citation_author
Item: _citation.journal_abbrev / _citation.pdbx_database_id_PubMed / _citation.title
Revision 1.2Sep 13, 2017Group: Author supporting evidence / Data collection / Database references
Category: citation / em_software / pdbx_audit_support
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _em_software.name / _pdbx_audit_support.funding_organization
Revision 1.3Nov 8, 2017Group: Derived calculations / Category: pdbx_struct_assembly
Item: _pdbx_struct_assembly.details / _pdbx_struct_assembly.method_details
Revision 1.4Jul 18, 2018Group: Data collection / Experimental preparation / Category: em_sample_support / em_software / Item: _em_sample_support.grid_type / _em_software.name
Revision 1.5Dec 11, 2019Group: Author supporting evidence / Structure summary / Category: em_entity_assembly / pdbx_audit_support
Item: _em_entity_assembly.entity_id_list / _pdbx_audit_support.funding_organization
Revision 1.6Nov 13, 2024Group: Data collection / Database references / Structure summary
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / em_admin / pdbx_entry_details / pdbx_modification_feature
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _em_admin.last_update

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Structure visualization

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Assembly

Deposited unit
A: MERS S
B: G4 VH
C: G4 VL
D: MERS S
E: G4 VH
F: G4 VL
G: MERS S
H: MERS S
I: MERS S
J: MERS S


Theoretical massNumber of molelcules
Total (without water)976,31510
Polymers976,31510
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area37810 Å2
ΔGint-193 kcal/mol
Surface area174180 Å2

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Components

#1: Protein
MERS S / S protein


Mass: 146325.969 Da / Num. of mol.: 6 / Mutation: V1060P, L1061P
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Middle East respiratory syndrome-related coronavirus
Production host: Homo sapiens (human) / References: UniProt: W5ZZF5, UniProt: K9N5Q8*PLUS
#2: Antibody G4 VH


Mass: 25312.352 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Production host: Homo sapiens (human)
#3: Antibody G4 VL


Mass: 23867.367 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Production host: Homo sapiens (human)
Has protein modificationY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: MERS S ectodomain trimer in complex with Fab of neutralizing antibody G4
Type: COMPLEX / Entity ID: all / Source: MULTIPLE SOURCES
Molecular weightValue: 0.6 MDa / Experimental value: NO
Source (natural)Organism: Middle East respiratory syndrome-related coronavirus
Buffer solutionpH: 7.4
Buffer componentName: TBS
SpecimenConc.: 1 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 400 divisions/in. / Grid type: C-flat
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal magnification: 29000 X / Nominal defocus max: 2500 nm / Nominal defocus min: 700 nm / Cs: 2.7 mm / C2 aperture diameter: 70 µm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingAverage exposure time: 0.2 sec. / Electron dose: 1.89 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of grids imaged: 1
Image scansSampling size: 5 µm / Movie frames/image: 35 / Used frames/image: 1-35

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Processing

EM software
IDNameVersionCategory
2Leginonimage acquisition
4CTFFIND3CTF correction
7Rosettamodel fitting
9RELION1.4initial Euler assignment
10RELION1.4final Euler assignment
11RELION1.4classification
12RELION1.43D reconstruction
13Rosettamodel refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 37180
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 5 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 8133 / Symmetry type: POINT
Atomic model buildingProtocol: OTHER / Space: REAL

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