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- EMDB-32959: S41 neutralizing antibody Fab(MERS-CoV) -

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Basic information

Entry
Database: EMDB / ID: EMD-32959
TitleS41 neutralizing antibody Fab(MERS-CoV)
Map data
Sample
  • Complex: MERS-CoV Spike RBD domain with S41 Fab
    • Complex: MERS-CoV Spike RBD domain
      • Protein or peptide: Spike glycoprotein
    • Complex: S41 Fab
      • Protein or peptide: antibody S41 heavy chain
      • Protein or peptide: antibody S41 light chain
Keywordsantibody / VIRAL PROTEIN-IMMUNE SYSTEM complex
Function / homology
Function and homology information


host cell endoplasmic reticulum-Golgi intermediate compartment membrane / 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, 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. ...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, 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)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.685 Å
AuthorsZeng JW / Zhang SY
Funding support China, 1 items
OrganizationGrant numberCountry
Ministry of Science and Technology (MoST, China)2020YFC0845900 China
CitationJournal: Front Microbiol / Year: 2022
Title: Cryoelectron microscopy structures of a human neutralizing antibody bound to MERS-CoV spike glycoprotein.
Authors: Shuyuan Zhang / Wenxv Jia / Jianwei Zeng / Mingxi Li / Ziyi Wang / Haixia Zhou / Linqi Zhang / Xinquan Wang /
Abstract: Neutralizing monoclonal antibodies (mAbs) against highly pathogenic coronaviruses represent promising candidates for clinical intervention. Here, we isolated a potent neutralizing monoclonal ...Neutralizing monoclonal antibodies (mAbs) against highly pathogenic coronaviruses represent promising candidates for clinical intervention. Here, we isolated a potent neutralizing monoclonal antibody, MERS-S41, from a yeast displayed scFv library using the S protein as a bait. To uncover the neutralization mechanism, we determined structures of MERS-S41 Fab in complex with the trimeric spike glycoprotein by cryoelectron microscopy (cryo-EM). We observed four distinct classes of the complex structure, which showed that the MERS-S41 Fab bound to the "up" receptor binding domain (RBD) with full saturation and also bound to an accessible partially lifted "down" RBD, providing a structural basis for understanding how mAbs bind to trimeric spike glycoproteins. Structure analysis of the epitope and cell surface staining assays demonstrated that virus entry is blocked predominantly by direct competition with the host receptor, dipeptidyl peptidase-4 (DPP4).
History
DepositionFeb 25, 2022-
Header (metadata) releaseNov 9, 2022-
Map releaseNov 9, 2022-
UpdateOct 16, 2024-
Current statusOct 16, 2024Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_32959.png

Downloads & links

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Map

FileDownload / File: emd_32959.map.gz / Format: CCP4 / Size: 125 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.08 Å/pix.
x 320 pix.
= 346.4 Å		1.08 Å/pix.
x 320 pix.
= 346.4 Å		1.08 Å/pix.
x 320 pix.
= 346.4 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.0825 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.01
Minimum - Maximum-0.07399118 - 0.13083436
Average (Standard dev.)0.0000339997 (±0.0012958123)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions320320320
Spacing320320320
CellA=B=C: 346.4 Å
α=β=γ: 90.0 °

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Supplemental data

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Sample components

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Entire : MERS-CoV Spike RBD domain with S41 Fab

EntireName: MERS-CoV Spike RBD domain with S41 Fab
Components
  • Complex: MERS-CoV Spike RBD domain with S41 Fab
    • Complex: MERS-CoV Spike RBD domain
      • Protein or peptide: Spike glycoprotein
    • Complex: S41 Fab
      • Protein or peptide: antibody S41 heavy chain
      • Protein or peptide: antibody S41 light chain

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Supramolecule #1: MERS-CoV Spike RBD domain with S41 Fab

SupramoleculeName: MERS-CoV Spike RBD domain with S41 Fab / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2

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Supramolecule #2: MERS-CoV Spike RBD domain

SupramoleculeName: MERS-CoV Spike RBD domain / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #2
Source (natural)Organism: Homo sapiens (human)

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Supramolecule #3: S41 Fab

SupramoleculeName: S41 Fab / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #1, #3

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Macromolecule #1: antibody S41 heavy chain

MacromoleculeName: antibody S41 heavy chain / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 23.251098 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: QVQLVQSGAE VKKPGSSVKV SCKASGGTFS SYGITWVRQA PGQGLEWMGR IIPILGISRS VQKFQGRITI TADKSTSTAY MDLSGLTSD DTAVYYCARE GGSGYDFFDY WGQGTLVTVS SASTKGPSVF PLAPSSKSTS GGTAALGCLV KDYFPEPVTV S WNSGALTS ...String:
QVQLVQSGAE VKKPGSSVKV SCKASGGTFS SYGITWVRQA PGQGLEWMGR IIPILGISRS VQKFQGRITI TADKSTSTAY MDLSGLTSD DTAVYYCARE GGSGYDFFDY WGQGTLVTVS SASTKGPSVF PLAPSSKSTS GGTAALGCLV KDYFPEPVTV S WNSGALTS GVHTFPAVLQ SSGLYSLSSV VTVPSSSLGT QTYICNVNHK PSNTKVDKRV EPK

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Macromolecule #2: Spike glycoprotein

MacromoleculeName: Spike glycoprotein / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Molecular weightTheoretical: 22.875826 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: VECDFSPLLS GTPPQVYNFK RLVFTNCNYN LTKLLSLFSV NDFTCSQISP AAIASNCYSS LILDYFSYPL SMKSDLSVSS AGPISQFNY KQSFSNPTCL ILATVPHNLT TITKPLKYSY INKCSRLLSD DRTEVPQLVN ANQYSPCVST VPSTVWEDGD Y YRKQLSPL ...String:
VECDFSPLLS GTPPQVYNFK RLVFTNCNYN LTKLLSLFSV NDFTCSQISP AAIASNCYSS LILDYFSYPL SMKSDLSVSS AGPISQFNY KQSFSNPTCL ILATVPHNLT TITKPLKYSY INKCSRLLSD DRTEVPQLVN ANQYSPCVST VPSTVWEDGD Y YRKQLSPL EGGGWLVASG STVAMTEQLQ MGFGITVQYG TDTNSVCPKA

UniProtKB: Spike glycoprotein

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Macromolecule #3: antibody S41 light chain

MacromoleculeName: antibody S41 light chain / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 23.095535 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: EIVLTQSPGT LSLSPGERAT LSCRASQSVS SSYLAWYQQR PGQAPRLLIY GASSRATGIP DRFSGSGSGT DFTLTIGRLE PEDSAVYYC QQYGSSPWTF GQGTKVEIKR TVAAPSVFIF PPSDEQLKSG TASVVCLLNN FYPREAKVQW KVDNALQSGN S QESVTEQD ...String:
EIVLTQSPGT LSLSPGERAT LSCRASQSVS SSYLAWYQQR PGQAPRLLIY GASSRATGIP DRFSGSGSGT DFTLTIGRLE PEDSAVYYC QQYGSSPWTF GQGTKVEIKR TVAAPSVFIF PPSDEQLKSG TASVVCLLNN FYPREAKVQW KVDNALQSGN S QESVTEQD SKDSTYSLSS TLTLSKADYE KHKVYACEVT HQGLSSPVTK SFNR

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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

BufferpH: 7.2
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: OTHER / Imaging mode: OTHER / Nominal defocus max: 3.0 µm / Nominal defocus min: 1.0 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: INSILICO MODEL
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.685 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 72778
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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