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- PDB-9lyo: Alpha SARS-CoV-2 spike protein in complex with REGN10987 Fab homo... -

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Basic information

Entry
Database: PDB / ID: 9lyo
TitleAlpha SARS-CoV-2 spike protein in complex with REGN10987 Fab homologue.
Components
  • REGN10987 Fab homologue (Heavy chain)
  • REGN10987 Fab homologue (Light chain)
  • Spike glycoprotein
KeywordsVIRAL PROTEIN
Function / homology
Function and homology information


Maturation of spike protein / viral translation / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / symbiont-mediated-mediated suppression of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / entry receptor-mediated virion attachment to host cell ...Maturation of spike protein / viral translation / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / symbiont-mediated-mediated suppression of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / entry receptor-mediated virion attachment to host cell / membrane fusion / 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 / 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, 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 ...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
Biological speciesHomo sapiens (human)
Severe acute respiratory syndrome coronavirus 2
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.07 Å
AuthorsKocharovskaya, M.V. / Pichkur, E.B. / Shenkarev, Z.O. / Lyukmanova, E.N.
Funding support1items
OrganizationGrant numberCountry
Not funded
CitationJournal: Biochem Biophys Res Commun / Year: 2025
Title: Structure and dynamics of Alpha B.1.1.7 SARS-CoV-2 S-protein in complex with Fab of neutralizing antibody REGN10987.
Authors: Milita V Kocharovskaya / Evgeny B Pichkur / Artem D Ivannikov / Daria D Kharlampieva / Ekaterina N Grafskaia / Ekaterina N Lyukmanova / Mikhail P Kirpichnikov / Zakhar O Shenkarev /
Abstract: One of the approaches for treatment of COVID-19 is a use of neutralizing antibodies (nAbs). The study of the mechanisms by which nAbs recognize different strains of SARS-CoV-2 may facilitate the ...One of the approaches for treatment of COVID-19 is a use of neutralizing antibodies (nAbs). The study of the mechanisms by which nAbs recognize different strains of SARS-CoV-2 may facilitate the development of new drugs and vaccines against the coronavirus infection. In this work, we present the 3.1 Å resolution cryo-electron microscopy structure of a full-length trimeric spike-protein (S-protein) of the SARS-CoV-2 Alpha (B.1.1.7) variant in complex with the Fab of the REGN10987 nAb. In the complex, two receptor-binding domains (RBDs) of the S-protein were observed in the 'up' state, whereas third RBD was in the 'down' state. This distinguishes the obtained structure from the complex of Delta (B.1.617.2) S-protein with REGN10987-Fab, where only one RBD was in the 'up' state. Probably some of the substituted residues (K478T, A570D, and S982A) located at the interprotomer interfaces are responsible for the greater Alpha S-protein opening upon the REGN10987-Fab binding. The Fab identically binds to the RBD in the both 'up' and 'down' conformations. The RBD-Fab interaction interface was refined to a resolution of 3.6 Å. The antibody binds to the receptor-binding motif (RBM), which prevents the S-protein from the binding to its receptor, angiotensin-converting enzyme 2 (ACE-2). Comparison with the structures of the Wuhan (wild type) and Delta RBD variants in complex with REGN10987-Fab revealed that the N501Y and T478K/L452R mutations presented in the RBM of the Alpha and Delta variants, respectively, do not affect the mode of the RBD-Fab interaction.
History
DepositionFeb 20, 2025Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Apr 2, 2025Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
i: REGN10987 Fab homologue (Light chain)
j: REGN10987 Fab homologue (Heavy chain)
A: Spike glycoprotein
B: Spike glycoprotein
C: Spike glycoprotein
g: REGN10987 Fab homologue (Light chain)
h: REGN10987 Fab homologue (Heavy chain)
l: REGN10987 Fab homologue (Light chain)
n: REGN10987 Fab homologue (Heavy chain)
hetero molecules


Theoretical massNumber of molelcules
Total (without water)586,06656
Polymers569,3709
Non-polymers16,69647
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: Antibody REGN10987 Fab homologue (Light chain)


Mass: 23334.691 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)
#2: Antibody REGN10987 Fab homologue (Heavy chain)


Mass: 23792.617 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: Protein Spike glycoprotein / S glycoprotein / E2 / Peplomer protein


Mass: 142662.797 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
#4: Polysaccharide...
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 424.401 Da / Num. of mol.: 31
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2122h-1b_1-5_2*NCC/3=O]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}LINUCSPDB-CARE
#5: 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.: 16 / 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

Component
IDNameTypeEntity IDParent-IDSource
1Alpha SARS-CoV-2 S-protein + REGN10987 Fab homologueCOMPLEX#1-#30MULTIPLE SOURCES
2REGN10987 Fab homologueCOMPLEX#1-#21RECOMBINANT
3Alpha SARS-CoV-2 S-proteinORGANELLE OR CELLULAR COMPONENT#31RECOMBINANT
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
11Homo sapiens (human)9606
22Homo sapiens (human)9606
33Severe acute respiratory syndrome coronavirus 22697049
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-ID
11Homo sapiens (human)9606
22Homo sapiens (human)9606
33Homo sapiens (human)9606
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: SPOT SCAN
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 1600 nm / Nominal defocus min: 800 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k)

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Processing

EM softwareName: PHENIX / Version: 1.20.1_4487 / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.07 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 34988 / Symmetry type: POINT

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