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- PDB-9mi3: Cryo-EM structure of SARS-CoV-2 spike protein in complex with neu... -

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Basic information

Entry
Database: PDB / ID: 9mi3
TitleCryo-EM structure of SARS-CoV-2 spike protein in complex with neutralizing human antibody WRAIR-2008
Components
  • Spike glycoprotein
  • WRAIR-2008 antibody Fab heavy chain
  • WRAIR-2008 antibody Fab light chain
KeywordsVIRAL PROTEIN / immune system / severe acute respiratory syndrome coronavirus 2 / HexaPro / neutralizing antibody / human antibody
Function / homology
Function and homology information


symbiont-mediated disruption of host tissue / Maturation of spike protein / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / viral translation / symbiont-mediated-mediated suppression of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion ...symbiont-mediated disruption of host tissue / Maturation of spike protein / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / viral translation / symbiont-mediated-mediated suppression of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / membrane fusion / entry receptor-mediated virion attachment to host cell / Attachment and Entry / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / positive regulation of viral entry into host cell / receptor-mediated virion attachment to host cell / host cell surface receptor binding / symbiont-mediated suppression of host innate immune response / receptor ligand activity / 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 / symbiont entry into host cell / 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
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, N-terminal domain superfamily / Spike S1 subunit, receptor binding domain superfamily, betacoronavirus / Spike glycoprotein, betacoronavirus / 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 (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, N-terminal domain superfamily / Spike S1 subunit, receptor binding domain superfamily, betacoronavirus / Spike glycoprotein, betacoronavirus / 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 / Betacoronavirus spike glycoprotein S1, receptor binding / Spike glycoprotein S1, N-terminal domain, betacoronavirus-like / Betacoronavirus-like spike glycoprotein S1, N-terminal / Spike glycoprotein S2 superfamily, coronavirus / 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, coronavirus / Coronavirus spike glycoprotein S2
Similarity search - Domain/homology
Biological speciesSevere acute respiratory syndrome coronavirus 2
Homo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.23 Å
AuthorsJensen, J.L. / Thomas, P.V. / Joyce, M.G.
Funding support United States, 1items
OrganizationGrant numberCountry
Department of Defense (DOD, United States)W81XWH-18-2-0040 United States
CitationJournal: mBio / Year: 2025
Title: First-generation N-terminal domain supersite public antibodies retain activity against Omicron-derived lineages and protect mice against Omicron BA.5 challenge.
Authors: Vincent Dussupt / Jaime L Jensen / Paul V Thomas / Letzibeth Mendez-Rivera / Kerri G Lal / Michelle Zemil McCrea / Isabella Swafford / Joana Hernandez / Rajeshwer S Sankhala / Mekhala Rao / ...Authors: Vincent Dussupt / Jaime L Jensen / Paul V Thomas / Letzibeth Mendez-Rivera / Kerri G Lal / Michelle Zemil McCrea / Isabella Swafford / Joana Hernandez / Rajeshwer S Sankhala / Mekhala Rao / Juhi Arora / Agnes Hajduczki / Ningbo Jian / Phyllis A Rees / Indica Showell-De Leon / Gabriel Smith / Lauren Smith / Diana Wasson / Annika Schmid / I-Ting Teng / Tongqing Zhou / Peter D Kwong / Jeffrey R Currier / William W Reiley / Dominic Paquin-Proulx / Victoria R Polonis / Natalie D Collins / Nelson L Michael / M Gordon Joyce / Shelly J Krebs /
Abstract: Monoclonal antibodies to SARS-CoV-2 can offer prophylactic and therapeutic protection against severe disease, with particular utility for immunosuppressed and vulnerable populations. With the ...Monoclonal antibodies to SARS-CoV-2 can offer prophylactic and therapeutic protection against severe disease, with particular utility for immunosuppressed and vulnerable populations. With the constant emergence of new variants, understanding the neutralizing potency of monoclonal antibodies to dynamic spike protein epitopes is crucial. We show that a set of VH1-24-derived N-terminal domain (NTD)-directed antibodies, isolated from a convalescent donor early in the pandemic, displayed remarkable neutralization resilience against many Omicron SARS-CoV-2 variants, including BA.2, BA.5, and BQ.1.1. Neutralization potency to these Omicron variants is associated with slower off-rates to the spike protein. Structural characterization of the most potent NTD antibody, WRAIR-2008, revealed a conserved mode of interaction shared with other antibodies of the same multi-donor class. WRAIR-2008 protected mice from weight loss following BA.5 challenge and reduced infectious viral titers in the lungs. Our study highlights the retention of neutralization activity and protection of first-generation VH1-24-derived NTD-directed antibodies to specific Omicron variants and provides valuable insights into the shifting landscape of SARS-CoV-2 variants that are vulnerable to select monoclonal antibodies.
IMPORTANCE: As SARS-CoV-2 circulating variants evolve, it is important to understand the vulnerabilities of these viruses to neutralizing antibodies. Within this manuscript, we describe first- ...IMPORTANCE: As SARS-CoV-2 circulating variants evolve, it is important to understand the vulnerabilities of these viruses to neutralizing antibodies. Within this manuscript, we describe first-generation antibodies isolated following infection with WA-1 that retain viral neutralization to subsequent Omicron variants by targeting a site of viral vulnerability called the NTD. This work highlights the shifting landscape of SARS-CoV-2 variants and provides mechanistic insights into how antibodies from prior infections may play a role in preventing subsequent SARS-CoV-2 variant infections.
History
DepositionDec 12, 2024Deposition site: RCSB / Processing site: RCSB
Revision 1.0Aug 20, 2025Provider: repository / Type: Initial release
Revision 1.0Aug 20, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Aug 20, 2025Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Aug 20, 2025Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Aug 20, 2025Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Aug 20, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Aug 20, 2025Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.1Sep 10, 2025Group: Data collection / Database references / Category: citation / citation_author / em_admin
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Revision 1.2Oct 22, 2025Group: Data collection / Database references / Category: citation / citation_author / em_admin
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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Spike glycoprotein
B: WRAIR-2008 antibody Fab heavy chain
C: Spike glycoprotein
D: WRAIR-2008 antibody Fab light chain
E: WRAIR-2008 antibody Fab heavy chain
F: WRAIR-2008 antibody Fab light chain
H: WRAIR-2008 antibody Fab heavy chain
K: Spike glycoprotein
L: WRAIR-2008 antibody Fab light chain
hetero molecules


Theoretical massNumber of molelcules
Total (without water)576,05841
Polymers568,9809
Non-polymers7,07932
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 / S glycoprotein / E2 / Peplomer protein


Mass: 140766.359 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Severe acute respiratory syndrome coronavirus 2
Gene: S, 2 / Production host: Homo sapiens (human) / References: UniProt: P0DTC2
#2: Antibody WRAIR-2008 antibody Fab heavy chain


Mass: 24786.604 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)
#3: Antibody WRAIR-2008 antibody Fab light chain


Mass: 24106.947 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)
#4: Sugar...
ChemComp-NAG / 2-acetamido-2-deoxy-beta-D-glucopyranose / N-acetyl-beta-D-glucosamine / 2-acetamido-2-deoxy-beta-D-glucose / 2-acetamido-2-deoxy-D-glucose / 2-acetamido-2-deoxy-glucose / N-ACETYL-D-GLUCOSAMINE


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 32 / Source method: obtained synthetically / Formula: C8H15NO6
IdentifierTypeProgram
DGlcpNAcbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-b-D-glucopyranosamineCOMMON NAMEGMML 1.0
b-D-GlcpNAcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcNAcSNFG CARBOHYDRATE SYMBOLGMML 1.0
Has ligand of interestN
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: SARS-CoV-2 spike protein with WRAIR-2008 Fab / Type: COMPLEX / Entity ID: #1-#3 / Source: RECOMBINANT
Molecular weightValue: 0.573 MDa / Experimental value: YES
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 7.4 / Details: PBS + 2% v/v glycerol
SpecimenConc.: 0.6 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: Quantifoil R0.6/1
VitrificationInstrument: LEICA EM GP / Cryogen name: ETHANE

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Electron microscopy imaging

MicroscopyModel: JEOL CRYO ARM 200
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: OTHER
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 3200 nm / Nominal defocus min: 100 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM software
IDNameVersionCategory
1cryoSPARC4.4.0particle selection
2SerialEMimage acquisition
7UCSF ChimeraX1.5model fitting
12cryoSPARC4.4.03D reconstruction
13ISOLDEmodel refinement
14Cootmodel refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C3 (3 fold cyclic)
3D reconstructionResolution: 3.23 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 296457 / Symmetry type: POINT
Atomic model buildingPDB-ID: 6gze

6gze


Accession code: 6gze / Source name: PDB / Type: experimental model
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00331725
ELECTRON MICROSCOPYf_angle_d0.49543175
ELECTRON MICROSCOPYf_dihedral_angle_d10.38611875
ELECTRON MICROSCOPYf_chiral_restr0.0454957
ELECTRON MICROSCOPYf_plane_restr0.0045553

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