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- EMDB-32437: SARS-CoV-2 Beta spike in complex with two S3H3 Fabs -

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Basic information

Entry
Database: EMDB / ID: EMD-32437
TitleSARS-CoV-2 Beta spike in complex with two S3H3 Fabs
Map data
Sample
  • Complex: SARS-CoV-2 Beta spike in complex with S3H3 Fab
    • Complex: SARS-CoV-2 spike protein
      • Protein or peptide: Spike glycoprotein
    • Complex: Heavy chain of S3H3 Fab
      • Protein or peptide: Heavy chain of S3H3 Fab
    • Complex: Light chain of S3H3 Fab
      • Protein or peptide: Light chain of S3H3 Fab
KeywordsSARS-CoV-2 / coronavirus / Beta variant / B.1.351 lineage / spike protein / VIRAL 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 / suppression by virus 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 / 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
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 speciesSevere acute respiratory syndrome coronavirus 2 / Mus musculus (house mouse)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.9 Å
AuthorsWang YF / Cong Y
Funding support China, 1 items
OrganizationGrant numberCountry
Chinese Academy of Sciences China
CitationJournal: Emerg Microbes Infect / Year: 2022
Title: Mapping cross-variant neutralizing sites on the SARS-CoV-2 spike protein.
Authors: Shiqi Xu / Yifan Wang / Yanxing Wang / Chao Zhang / Qin Hong / Chenjian Gu / Rong Xu / Tingfeng Wang / Yong Yang / Jinkai Zang / Yu Zhou / Zuyang Li / Qixing Liu / Bingjie Zhou / Lulu Bai / ...Authors: Shiqi Xu / Yifan Wang / Yanxing Wang / Chao Zhang / Qin Hong / Chenjian Gu / Rong Xu / Tingfeng Wang / Yong Yang / Jinkai Zang / Yu Zhou / Zuyang Li / Qixing Liu / Bingjie Zhou / Lulu Bai / Yuanfei Zhu / Qiang Deng / Haikun Wang / Dimitri Lavillette / Gary Wong / Youhua Xie / Yao Cong / Zhong Huang /
Abstract: The emergence of multiple severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants of concern threatens the efficacy of currently approved vaccines and authorized therapeutic monoclonal ...The emergence of multiple severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants of concern threatens the efficacy of currently approved vaccines and authorized therapeutic monoclonal antibodies (MAbs). It is hence important to continue searching for SARS-CoV-2 broadly neutralizing MAbs and defining their epitopes. Here, we isolate 9 neutralizing mouse MAbs raised against the spike protein of a SARS-CoV-2 prototype strain and evaluate their neutralizing potency towards a panel of variants, including B.1.1.7, B.1.351, B.1.617.1, and B.1.617.2. By using a combination of biochemical, virological, and cryo-EM structural analyses, we identify three types of cross-variant neutralizing MAbs, represented by S5D2, S5G2, and S3H3, respectively, and further define their epitopes. S5D2 binds the top lateral edge of the receptor-binding motif within the receptor-binding domain (RBD) with a binding footprint centred around the loop, and efficiently neutralizes all variant pseudoviruses, but the potency against B.1.617.2 was observed to decrease significantly. S5G2 targets the highly conserved RBD core region and exhibits comparable neutralization towards the variant panel. S3H3 binds a previously unreported epitope located within the evolutionarily stable SD1 region and is able to near equally neutralize all of the variants tested. Our work thus defines three distinct cross-variant neutralizing sites on the SARS-CoV-2 spike protein, providing guidance for design and development of broadly effective vaccines and MAb-based therapies.
History
DepositionDec 21, 2021-
Header (metadata) releaseFeb 2, 2022-
Map releaseFeb 2, 2022-
UpdateOct 23, 2024-
Current statusOct 23, 2024Processing site: PDBj / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 1.02
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 1.02
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7wdf
  • Surface level: 1.02
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_32437.png

Downloads & links

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Map

FileDownload / File: emd_32437.map.gz / Format: CCP4 / Size: 178 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.09 Å/pix.
x 360 pix.
= 393.48 Å		1.09 Å/pix.
x 360 pix.
= 393.48 Å		1.09 Å/pix.
x 360 pix.
= 393.48 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.093 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 1.02 / Movie #1: 1.02
Minimum - Maximum-2.4299877 - 4.092068
Average (Standard dev.)0.009361333 (±0.12363777)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions360360360
Spacing360360360
CellA=B=C: 393.48 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.0931.0931.093
M x/y/z360360360
origin x/y/z0.0000.0000.000
length x/y/z393.480393.480393.480
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ400400400
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS360360360
D min/max/mean-2.4304.0920.009

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Supplemental data

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Sample components

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Entire : SARS-CoV-2 Beta spike in complex with S3H3 Fab

EntireName: SARS-CoV-2 Beta spike in complex with S3H3 Fab
Components
  • Complex: SARS-CoV-2 Beta spike in complex with S3H3 Fab
    • Complex: SARS-CoV-2 spike protein
      • Protein or peptide: Spike glycoprotein
    • Complex: Heavy chain of S3H3 Fab
      • Protein or peptide: Heavy chain of S3H3 Fab
    • Complex: Light chain of S3H3 Fab
      • Protein or peptide: Light chain of S3H3 Fab

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Supramolecule #1: SARS-CoV-2 Beta spike in complex with S3H3 Fab

SupramoleculeName: SARS-CoV-2 Beta spike in complex with S3H3 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: SARS-CoV-2 spike protein

SupramoleculeName: SARS-CoV-2 spike protein / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2

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Supramolecule #3: Heavy chain of S3H3 Fab

SupramoleculeName: Heavy chain of S3H3 Fab / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #2
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2

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Supramolecule #4: Light chain of S3H3 Fab

SupramoleculeName: Light chain of S3H3 Fab / type: complex / ID: 4 / Parent: 1 / Macromolecule list: #3

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Macromolecule #1: Spike glycoprotein

MacromoleculeName: Spike glycoprotein / type: protein_or_peptide / ID: 1 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Molecular weightTheoretical: 139.650516 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MFVFLVLLPL VSSQCVNFTT RTQLPPAYTN SFTRGVYYPD KVFRSSVLHS TQDLFLPFFS NVTWFHAIHV SGTNGTKRFA NPVLPFNDG VYFASTEKSN IIRGWIFGTT LDSKTQSLLI VNNATNVVIK VCEFQFCNDP FLGVYYHKNN KSWMESEFRV Y SSANNCTF ...String:
MFVFLVLLPL VSSQCVNFTT RTQLPPAYTN SFTRGVYYPD KVFRSSVLHS TQDLFLPFFS NVTWFHAIHV SGTNGTKRFA NPVLPFNDG VYFASTEKSN IIRGWIFGTT LDSKTQSLLI VNNATNVVIK VCEFQFCNDP FLGVYYHKNN KSWMESEFRV Y SSANNCTF EYVSQPFLMD LEGKQGNFKN LREFVFKNID GYFKIYSKHT PINLVRGLPQ GFSALEPLVD LPIGINITRF QT LHISYLT PGDSSSGWTA GAAAYYVGYL QPRTFLLKYN ENGTITDAVD CALDPLSETK CTLKSFTVEK GIYQTSNFRV QPT ESIVRF PNITNLCPFG EVFNATRFAS VYAWNRKRIS NCVADYSVLY NSASFSTFKC YGVSPTKLND LCFTNVYADS FVIR GDEVR QIAPGQTGNI ADYNYKLPDD FTGCVIAWNS NNLDSKVGGN YNYLYRLFRK SNLKPFERDI STEIYQAGST PCNGV KGFN CYFPLQSYGF QPTYGVGYQP YRVVVLSFEL LHAPATVCGP KKSTNLVKNK CVNFNFNGLT GTGVLTESNK KFLPFQ QFG RDIADTTDAV RDPQTLEILD ITPCSFGGVS VITPGTNTSN QVAVLYQGVN CTEVPVAIHA DQLTPTWRVY STGSNVF QT RAGCLIGAEH VNNSYECDIP IGAGICASYQ TQTNSPGSAS SVASQSIIAY TMSLGVENSV AYSNNSIAIP TNFTISVT T EILPVSMTKT SVDCTMYICG DSTECSNLLL QYGSFCTQLN RALTGIAVEQ DKNTQEVFAQ VKQIYKTPPI KDFGGFNFS QILPDPSKPS KRSFIEDLLF NKVTLADAGF IKQYGDCLGD IAARDLICAQ KFNGLTVLPP LLTDEMIAQY TSALLAGTIT SGWTFGAGA ALQIPFAMQM AYRFNGIGVT QNVLYENQKL IANQFNSAIG KIQDSLSSTA SALGKLQDVV NQNAQALNTL V KQLSSNFG AISSVLNDIL SRLDPPEAEV QIDRLITGRL QSLQTYVTQQ LIRAAEIRAS ANLAATKMSE CVLGQSKRVD FC GKGYHLM SFPQSAPHGV VFLHVTYVPA QEKNFTTAPA ICHDGKAHFP REGVFVSNGT HWFVTQRNFY EPQIITTDNT FVS GNCDVV IGIVNNTVYD PLQPELDSFK EELDKYFKNH TSPDVDLGDI SGINASVVNI QKEIDRLNEV AKNLNESLID LQEL GKYEQ GSGYIPEAPR DGQAYVRKDG EWVLLSTFLE NLYFQGDYKD DDDKHHHHHH HHH

UniProtKB: Spike glycoprotein

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Macromolecule #2: Heavy chain of S3H3 Fab

MacromoleculeName: Heavy chain of S3H3 Fab / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 23.619521 KDa
SequenceString: QVQLQQPGAE LVRPGASVKL SCKASGYSFT RFWMNWVKQR PGQGLEWIGM IHPSDSETRL NQKFKDKATL TVDKSSTTAY MQLSSPTSE DSAVYYCARK DYDYDAWFAY WGQGTLVTVS AAKTTPPSVY PLAPGSAAQT NSMVTLGCLV KGYFPEPVTV T WNSGSLSS ...String:
QVQLQQPGAE LVRPGASVKL SCKASGYSFT RFWMNWVKQR PGQGLEWIGM IHPSDSETRL NQKFKDKATL TVDKSSTTAY MQLSSPTSE DSAVYYCARK DYDYDAWFAY WGQGTLVTVS AAKTTPPSVY PLAPGSAAQT NSMVTLGCLV KGYFPEPVTV T WNSGSLSS GVHTFPAVLQ SDLYTLSSSV TVPSSTWPSE TVTCNVAHPA SSTKVDKKI

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Macromolecule #3: Light chain of S3H3 Fab

MacromoleculeName: Light chain of S3H3 Fab / type: protein_or_peptide / ID: 3 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 23.5401 KDa
SequenceString: DIVLTQSPAS LAVSLGQRAT ISCRASKSVS ASVYSYMHWY QQKPGQPPKL LIYLASSLES GVPARFSGSG SGTDFTLNIH PVEEEDAAT YYCHHSRELP PAFGGGTKLE IKRADAAPTV SIFPPSSEQL TSGGASVVCF LNNFYPKDIN VKWKIDGSER Q NGVLNSWT ...String:
DIVLTQSPAS LAVSLGQRAT ISCRASKSVS ASVYSYMHWY QQKPGQPPKL LIYLASSLES GVPARFSGSG SGTDFTLNIH PVEEEDAAT YYCHHSRELP PAFGGGTKLE IKRADAAPTV SIFPPSSEQL TSGGASVVCF LNNFYPKDIN VKWKIDGSER Q NGVLNSWT DQDSKDSTYS MSSTLTLTKD EYERHNSYTC EATHKTSTSP IVKSFNR

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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: 7.5
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.5 µm / Nominal defocus min: 0.8 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: EMDB MAP
EMDB ID:

30701

Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.9 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 53200
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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