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- PDB-8r8k: XBB-4 Fab in complex with SARS-CoV-2 BA.2.12.1 Spike Glycoprotein -

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Basic information

Entry
Database: PDB / ID: 8r8k
TitleXBB-4 Fab in complex with SARS-CoV-2 BA.2.12.1 Spike Glycoprotein
Components
  • Spike glycoprotein,Fibritin
  • XBB-4 Fab Heavy chain
  • XBB-4 Fab Light chain
KeywordsVIRAL PROTEIN / SARS-CoV-2 / Spike / Glycoprotein / Coronavirus / antibody / Fab / XBB.1.5 / therapeutic / complex / neutralising / RBD / receptor binding domain / convalescent sera / immune system / XBB-4 / BA.2.12.1 / omicron variant / virus / BA.2.86
Function / homology
Function and homology information


virion component / Maturation of spike protein / viral translation / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / suppression by virus of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion ...virion component / Maturation of spike protein / viral translation / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / suppression by virus of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / entry receptor-mediated virion attachment to host cell / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / receptor-mediated endocytosis of virus by host cell / membrane fusion / Attachment and Entry / positive regulation of viral entry into host cell / receptor-mediated virion attachment to host cell / receptor ligand activity / host cell surface receptor binding / symbiont-mediated suppression of host innate immune response / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / virion attachment to host cell / SARS-CoV-2 activates/modulates innate and adaptive immune responses / host cell plasma membrane / virion membrane / identical protein binding / membrane / plasma membrane
Similarity search - Function
Fibritin C-terminal / Fibritin C-terminal region / Spike (S) protein S1 subunit, receptor-binding domain, SARS-CoV-2 / Spike (S) protein S1 subunit, N-terminal domain, SARS-CoV-like / 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. ...Fibritin C-terminal / Fibritin C-terminal region / Spike (S) protein S1 subunit, receptor-binding domain, SARS-CoV-2 / Spike (S) protein S1 subunit, N-terminal domain, SARS-CoV-like / 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 / Fibritin
Similarity search - Component
Biological speciesSevere acute respiratory syndrome coronavirus 2
Tequatrovirus T4
Homo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.41 Å
AuthorsDuyvesteyn, H.M.E. / Ren, J. / Stuart, D.I.
Funding support United Kingdom, 4items
OrganizationGrant numberCountry
Wellcome Trust203141/A/16/Z United Kingdom
Wellcome Trust101122/Z/13/Z United Kingdom
CAMS Innovation Fund for Medical Sciences (CIFMS)2018-I2M-2-002 United Kingdom
Medical Research Council (MRC, United Kingdom)MR/N00065X/1 United Kingdom
CitationJournal: Cell Rep Med / Year: 2024
Title: A structure-function analysis shows SARS-CoV-2 BA.2.86 balances antibody escape and ACE2 affinity.
Authors: Chang Liu / Daming Zhou / Aiste Dijokaite-Guraliuc / Piyada Supasa / Helen M E Duyvesteyn / Helen M Ginn / Muneeswaran Selvaraj / Alexander J Mentzer / Raksha Das / Thushan I de Silva / ...Authors: Chang Liu / Daming Zhou / Aiste Dijokaite-Guraliuc / Piyada Supasa / Helen M E Duyvesteyn / Helen M Ginn / Muneeswaran Selvaraj / Alexander J Mentzer / Raksha Das / Thushan I de Silva / Thomas G Ritter / Megan Plowright / Thomas A H Newman / Lizzie Stafford / Barbara Kronsteiner / Nigel Temperton / Yuan Lui / Martin Fellermeyer / Philip Goulder / Paul Klenerman / Susanna J Dunachie / Michael I Barton / Mikhail A Kutuzov / Omer Dushek / / Elizabeth E Fry / Juthathip Mongkolsapaya / Jingshan Ren / David I Stuart / Gavin R Screaton /
Abstract: BA.2.86, a recently described sublineage of SARS-CoV-2 Omicron, contains many mutations in the spike gene. It appears to have originated from BA.2 and is distinct from the XBB variants responsible ...BA.2.86, a recently described sublineage of SARS-CoV-2 Omicron, contains many mutations in the spike gene. It appears to have originated from BA.2 and is distinct from the XBB variants responsible for many infections in 2023. The global spread and plethora of mutations in BA.2.86 has caused concern that it may possess greater immune-evasive potential, leading to a new wave of infection. Here, we examine the ability of BA.2.86 to evade the antibody response to infection using a panel of vaccinated or naturally infected sera and find that it shows marginally less immune evasion than XBB.1.5. We locate BA.2.86 in the antigenic landscape of recent variants and look at its ability to escape panels of potent monoclonal antibodies generated against contemporary SARS-CoV-2 infections. We demonstrate, and provide a structural explanation for, increased affinity of BA.2.86 to ACE2, which may increase transmissibility.
History
DepositionNov 29, 2023Deposition site: PDBE / Processing site: PDBE
Revision 1.0May 8, 2024Provider: repository / Type: Initial release
Revision 1.1May 22, 2024Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year
Revision 1.2Jun 5, 2024Group: Database references / Category: citation / Item: _citation.journal_volume
Revision 1.3Aug 14, 2024Group: Data collection / Database references ...Data collection / Database references / Source and taxonomy / Structure summary
Category: em_admin / entity ...em_admin / entity / entity_name_com / entity_src_gen / struct_ref / struct_ref_seq / struct_ref_seq_dif
Item: _em_admin.last_update / _entity.pdbx_description
Revision 1.4Nov 13, 2024Group: Data collection / Structure summary
Category: em_admin / pdbx_entry_details / pdbx_modification_feature
Item: _em_admin.last_update

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Spike glycoprotein,Fibritin
H: XBB-4 Fab Heavy chain
L: XBB-4 Fab Light chain


Theoretical massNumber of molelcules
Total (without water)190,6713
Polymers190,6713
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

#1: Protein Spike glycoprotein,Fibritin / S glycoprotein / E2 / Peplomer protein / Collar protein / Whisker antigen control protein


Mass: 142729.250 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Severe acute respiratory syndrome coronavirus 2, (gene. exp.) Tequatrovirus T4
Gene: S, 2, wac / Production host: Homo sapiens (human) / References: UniProt: P0DTC2, UniProt: P10104
#2: Antibody XBB-4 Fab Heavy chain


Mass: 24755.660 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)
#3: Antibody XBB-4 Fab Light chain


Mass: 23185.750 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / 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

Component
IDNameTypeEntity IDParent-IDSourceDetails
1XBB-4 Fab in complex with SARS-COV-2 BA.2.12.1 Spike GlycoproteinCOMPLEXall0MULTIPLE SOURCES
2XBB-4 FabCOMPLEX#1-#21RECOMBINANTSequence from antibody isolated from convalescent sera.
3BA.2.12.1 Spike Glycoprotein EctodomainCOMPLEX#31RECOMBINANT
Molecular weight
IDEntity assembly-IDExperimental value
11NO
22
33
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
21Severe acute respiratory syndrome coronavirus 22697049
32Homo sapiens (human)9606
43Severe acute respiratory syndrome coronavirus 22697049
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-ID
21Homo sapiens (human)9606
32Homo sapiens (human)9606
43Homo sapiens (human)9606
Buffer solutionpH: 7.4
SpecimenConc.: 0.7 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Details: Spike ectodomain incubated with XBB-4 Fab in 2-fold molecular excess of sites (assuming three per trimeric spike unit).
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277.5 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: OTHER
Electron lensMode: BRIGHT FIELD / Calibrated magnification: 165000 X / Nominal defocus max: 2700 nm / Nominal defocus min: 800 nm / Cs: 2.7 mm / C2 aperture diameter: 50 µm
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingElectron dose: 50 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k)

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Processing

EM software
IDNameCategory
1cryoSPARCparticle selection
2EPUimage acquisition
4cryoSPARCCTF correction
7Cootmodel fitting
9PHENIXmodel refinement
10cryoSPARCinitial Euler assignment
11cryoSPARCfinal Euler assignment
12cryoSPARCclassification
13cryoSPARC3D reconstruction
CTF correctionDetails: Patch CTF and Motion correction, on-the-fly. / Type: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 3282771 / Details: Blob picker in cryoSPARC live interface.
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.41 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 61333
Details: Determined by cryoSPARC. Local refinement job centred around one fab and RBD.
Num. of class averages: 1 / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT / Space: REAL
Atomic model buildingPDB-ID: 8CIM

8cim


Accession code: 8CIM / Source name: PDB / Type: experimental model
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0034105
ELECTRON MICROSCOPYf_angle_d0.4615571
ELECTRON MICROSCOPYf_dihedral_angle_d3.589561
ELECTRON MICROSCOPYf_chiral_restr0.042602
ELECTRON MICROSCOPYf_plane_restr0.004725

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