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- EMDB-38372: SARS-CoV-2 Omicron BQ.1.1 Variant Spike Protein Complexed with MO... -

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Basic information

Entry
Database: EMDB / ID: EMD-38372
TitleSARS-CoV-2 Omicron BQ.1.1 Variant Spike Protein Complexed with MO11 Fab
Map data
Sample
  • Complex: Complex of spike ectodomain with antibody MO11 Fab
    • Protein or peptide: Spike glycoprotein
    • Protein or peptide: MO11 heavy chain
    • Protein or peptide: MO11 light chain
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
KeywordsSARS-CoV-2 / antibody complex / VIRAL PROTEIN / VIRAL PROTEIN-IMMUNE SYSTEM complex
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 / membrane fusion / receptor-mediated endocytosis of virus by host cell / 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 / Spike glycoprotein S1, N-terminal domain, betacoronavirus-like / Betacoronavirus-like spike glycoprotein S1, N-terminal / Betacoronavirus spike glycoprotein S1, receptor binding / 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 / Homo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.3 Å
AuthorsIshimaru H / Nishimura M / Shigematsu H / Marini MI / Hasegawa N / Takamiya R / Iwata S / Mori Y
Funding support1 items
OrganizationGrant numberCountry
Not funded
CitationJournal: J Virol / Year: 2024
Title: Epitopes of an antibody that neutralizes a wide range of SARS-CoV-2 variants in a conserved subdomain 1 of the spike protein.
Authors: Hanako Ishimaru / Mitsuhiro Nishimura / Hideki Shigematsu / Maria Istiqomah Marini / Natsumi Hasegawa / Rei Takamiya / Sachiyo Iwata / Yasuko Mori /
Abstract: The evolution of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has continued, enabling the virus to escape from host immunity by changing its spike antigen, while biased toward the ...The evolution of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has continued, enabling the virus to escape from host immunity by changing its spike antigen, while biased toward the receptor-binding domain and N-terminal domain. Here, we isolated a novel pan-SARS-CoV-2 neutralizing antibody (which we named MO11) for even the recent dominators XBB.1.16 and EG.5.1, from a convalescent patient who had received three doses of an original mRNA COVID-19 vaccination. A cryo-electron microscopy analysis of the spike-MO11 complex at 2.3 Å atomic resolution revealed that it recognizes a conserved epitope hidden behind a glycan shield at N331 on subdomain 1 (SD1), holding both the N- and C-terminal segments comprising SD1. Our identification of MO11 unveiled the functional importance of SD1 for the spike's function, and we discuss the potential availability of a novel common epitope among the SARS-CoV-2 variants.IMPORTANCENovel severe acute respiratory syndrome coronavirus 2 variants with immune evasion ability are still repeatedly emerging, nonetheless, a part of immunity developed in responding to the antigen of earlier variants retains efficacy against recent variants irrespective of the numerous mutations. In exploration for the broadly effective antibodies, we identified a cross-neutralizing antibody, named MO11, from the B cells of the convalescent patient. MO11 targets a novel epitope in subdomain 1 (SD1) and was effective against all emerging variants including XBB.1.16 and EG.5.1. The neutralizing activity covering from D614G to EG.5.1 variants was explained by the conservation of the epitope, and it revealed the importance of the subdomain on regulating the function of the antigen for viral infection. Demonstrated identification of the neutralizing antibody that recognizes a conserved epitope implies basal contribution of such group of antibodies for prophylaxis against COVID-19.
History
DepositionDec 19, 2023-
Header (metadata) releaseApr 24, 2024-
Map releaseApr 24, 2024-
UpdateOct 16, 2024-
Current statusOct 16, 2024Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_38372.png

Downloads & links

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Map

FileDownload / File: emd_38372.map.gz / Format: CCP4 / Size: 421.9 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.75 Å/pix.
x 480 pix.
= 360.96 Å		0.75 Å/pix.
x 480 pix.
= 360.96 Å		0.75 Å/pix.
x 480 pix.
= 360.96 Å

Surface

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Images are generated by Spider.

Voxel sizeX=Y=Z: 0.752 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.005
Minimum - Maximum-0.005833905 - 0.025673045
Average (Standard dev.)0.000014563999 (±0.00067565066)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions480480480
Spacing480480480
CellA=B=C: 360.96 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_38372_msk_1.map
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Half map: #2

Fileemd_38372_half_map_1.map
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Half map: #1

Fileemd_38372_half_map_2.map
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Sample components

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Entire : Complex of spike ectodomain with antibody MO11 Fab

EntireName: Complex of spike ectodomain with antibody MO11 Fab
Components
  • Complex: Complex of spike ectodomain with antibody MO11 Fab
    • Protein or peptide: Spike glycoprotein
    • Protein or peptide: MO11 heavy chain
    • Protein or peptide: MO11 light chain
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose

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Supramolecule #1: Complex of spike ectodomain with antibody MO11 Fab

SupramoleculeName: Complex of spike ectodomain with antibody MO11 Fab / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#3
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Molecular weightTheoretical: 500 KDa

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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 / Strain: TY41-796
Molecular weightTheoretical: 138.784125 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MFVFLVLLPL VSSQCVNLIT RTQSYTNSFT RGVYYPDKVF RSSVLHSTQD LFLPFFSNVT WFHAISGTNG TKRFDNPVLP FNDGVYFAS TEKSNIIRGW IFGTTLDSKT QSLLIVNNAT NVVIKVCEFQ FCNDPFLDVY YHKNNKSWME SEFRVYSSAN N CTFEYVSQ ...String:
MFVFLVLLPL VSSQCVNLIT RTQSYTNSFT RGVYYPDKVF RSSVLHSTQD LFLPFFSNVT WFHAISGTNG TKRFDNPVLP FNDGVYFAS TEKSNIIRGW IFGTTLDSKT QSLLIVNNAT NVVIKVCEFQ FCNDPFLDVY YHKNNKSWME SEFRVYSSAN N CTFEYVSQ PFLMDLEGKQ GNFKNLREFV FKNIDGYFKI YSKHTPINLG RDLPQGFSAL EPLVDLPIGI NITRFQTLLA LH RSYLTPG DSSSGWTAGA AAYYVGYLQP RTFLLKYNEN GTITDAVDCA LDPLSETKCT LKSFTVEKGI YQTSNFRVQP TES IVRFPN ITNLCPFDEV FNATTFASVY AWNRKRISNC VADYSVLYNF APFFAFKCYG VSPTKLNDLC FTNVYADSFV IRGN EVSQI APGQTGNIAD YNYKLPDDFT GCVIAWNSNK LDSTVGGNYN YRYRLFRKSK LKPFERDIST EIYQAGNKPC NGVAG VNCY FPLQSYGFRP TYGVGHQPYR VVVLSFELLH APATVCGPKK STNLVKNKCV NFNFNGLTGT GVLTESNKKF LPFQQF GRD IADTTDAVRD PQTLEILDIT PCSFGGVSVI TPGTNTSNQV AVLYQGVNCT EVPVAIHADQ LTPTWRVYST GSNVFQT RA GCLIGAEYVN NSYECDIPIG AGICASYQTQ TKSHASVASQ SIIAYTMSLG AENSVAYSNN SIAIPTNFTI SVTTEILP V SMTKTSVDCT MYICGDSTEC SNLLLQYGSF CTQLKRALTG IAVEQDKNTQ EVFAQVKQIY KTPPIKYFGG FNFSQILPD PSKPSKRSPI EDLLFNKVTL ADAGFIKQYG DCLGDIAARD LICAQKFNGL TVLPPLLTDE MIAQYTSALL AGTITSGWTF GAGPALQIP FPMQMAYRFN GIGVTQNVLY ENQKLIANQF NSAIGKIQDS LSSTPSALGK LQDVVNHNAQ ALNTLVKQLS S KFGAISSV LNDILSRLDP PEAEVQIDRL ITGRLQSLQT YVTQQLIRAA EIRASANLAA TKMSECVLGQ SKRVDFCGKG YH LMSFPQS APHGVVFLHV TYVPAQEKNF TTAPAICHDG KAHFPREGVF VSNGTHWFVT QRNFYEPQII TTDNTFVSGN CDV VIGIVN NTVYDPLQPE LDSFKEELDK YFKNHTSPDV DLGDISGINA SVVNIQKEID RLNEVAKNLN ESLIDLQELG KYEQ YIKWP LEVLFQGPGY IPEAPRDGQA YVRKDGEWVF LSTFLGHHHH HH

UniProtKB: Spike glycoprotein

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Macromolecule #2: MO11 heavy chain

MacromoleculeName: MO11 heavy chain / type: protein_or_peptide / ID: 2 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 24.479309 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: EVQLLESGGG LVQPGGSLRL SCAASGFSFS GYALSWVRQT PGKGLEWVSS ISGSADSTYY ADSVKGRFTI SRDNSKNTFY LQMSSLRAD DTAIYYCAKP PLGSNLFAVG YHFDYWGQGT LVTVSSASTK GPSVFPLAPS SKSTSGGTAA LGCLVKDYFP E PVTVSWNS ...String:
EVQLLESGGG LVQPGGSLRL SCAASGFSFS GYALSWVRQT PGKGLEWVSS ISGSADSTYY ADSVKGRFTI SRDNSKNTFY LQMSSLRAD DTAIYYCAKP PLGSNLFAVG YHFDYWGQGT LVTVSSASTK GPSVFPLAPS SKSTSGGTAA LGCLVKDYFP E PVTVSWNS GALTSGVHTF PAVLQSSGLY SLSSVVTVPS SSLGTQTYIC NVNHKPSNTK VDKKVEPKSC DKTH

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Macromolecule #3: MO11 light chain

MacromoleculeName: MO11 light chain / type: protein_or_peptide / ID: 3 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 22.848344 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: SYVLTQPPSV SVAPGKTARV TCGANNIGSE SVHWYQQKAG QAPVLVIYYD RGRPSGIPER FSGSNSGNTA TLTISRVEAG DEAEYYCQV WDKSSDHVVF GGGTKLIVLG QPKAAPSVTL FPPSSEELQA NKATLVCLIS DFYPGAVTVA WKADSSPVKA G VETTTPSK ...String:
SYVLTQPPSV SVAPGKTARV TCGANNIGSE SVHWYQQKAG QAPVLVIYYD RGRPSGIPER FSGSNSGNTA TLTISRVEAG DEAEYYCQV WDKSSDHVVF GGGTKLIVLG QPKAAPSVTL FPPSSEELQA NKATLVCLIS DFYPGAVTVA WKADSSPVKA G VETTTPSK QSNNKYAASS YLSLTPEQWK SHRSYSCQVT HEGSTVEKTV APTECS

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Macromolecule #7: 2-acetamido-2-deoxy-beta-D-glucopyranose

MacromoleculeName: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 7 / Number of copies: 21 / Formula: NAG
Molecular weightTheoretical: 221.208 Da
Chemical component information

ChemComp-NAG:
2-acetamido-2-deoxy-beta-D-glucopyranose

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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

Concentration8.6 mg/mL
BufferpH: 8 / Component:
ConcentrationName
20.0 mMTris-HCl
150.0 mMNaCl
GridModel: Quantifoil R0.6/1 / Material: COPPER / Mesh: 300
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 281 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeJEOL CRYO ARM 300
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: 1.6 µm / Nominal defocus min: 1.2 µm / Nominal magnification: 60000

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Image processing

Startup modelType of model: INSILICO MODEL
Final reconstructionApplied symmetry - Point group: C3 (3 fold cyclic) / Resolution.type: BY AUTHOR / Resolution: 2.3 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 4.0.0) / Number images used: 246238
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 4.0.0)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 4.0.0)
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial model
PDB IDChain

8h3n

source_name: PDB, initial_model_type: experimental model
source_name: AlphaFold, initial_model_type: in silico model
RefinementProtocol: FLEXIBLE FIT
Output model

PDB-8xi6:
SARS-CoV-2 Omicron BQ.1.1 Variant Spike Protein Complexed with MO11 Fab

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