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- EMDB-35328: cryo-EM density map of SARS-CoV-2 Omicron BA.1 spike in complex w... -

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Basic information

Entry
Database: EMDB / ID: EMD-35328
Titlecryo-EM density map of SARS-CoV-2 Omicron BA.1 spike in complex with RmAb 1H1 IgG
Map data
Sample
  • Complex: SARS-CoV-2 Omicron BA.1 spike glycoprotein complex with 1H1 IgG
    • Complex: Omicron BA.1 spike glycoprotein
      • Protein or peptide: SARS-CoV-2 Omicron BA.1 spike glycoprotein
    • Complex: 1H1 IgG
KeywordsVIRAL PROTEIN-IMMUNE SYSTEM COMPLEX
Function / homology
Function and homology information


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 ...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 / 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
Methodsingle particle reconstruction / cryo EM / Resolution: 3.68 Å
AuthorsGuo H / Gao Y / Lu Y / Yang H / Ji X
Funding support China, 1 items
OrganizationGrant numberCountry
Other government China
CitationJournal: Commun Biol / Year: 2023
Title: Mechanism of a rabbit monoclonal antibody broadly neutralizing SARS-CoV-2 variants.
Authors: Hangtian Guo / Yixuan Yang / Tiantian Zhao / Yuchi Lu / Yan Gao / Tinghan Li / Hang Xiao / Xiaoyu Chu / Le Zheng / Wanting Li / Hao Cheng / Haibin Huang / Yang Liu / Yang Lou / Henry C ...Authors: Hangtian Guo / Yixuan Yang / Tiantian Zhao / Yuchi Lu / Yan Gao / Tinghan Li / Hang Xiao / Xiaoyu Chu / Le Zheng / Wanting Li / Hao Cheng / Haibin Huang / Yang Liu / Yang Lou / Henry C Nguyen / Chao Wu / Yuxin Chen / Haitao Yang / Xiaoyun Ji /
Abstract: Due to the continuous evolution of SARS-CoV-2, the Omicron variant has emerged and exhibits severe immune evasion. The high number of mutations at key antigenic sites on the spike protein has made a ...Due to the continuous evolution of SARS-CoV-2, the Omicron variant has emerged and exhibits severe immune evasion. The high number of mutations at key antigenic sites on the spike protein has made a large number of existing antibodies and vaccines ineffective against this variant. Therefore, it is urgent to develop efficient broad-spectrum neutralizing therapeutic drugs. Here we characterize a rabbit monoclonal antibody (RmAb) 1H1 with broad-spectrum neutralizing potency against Omicron sublineages including BA.1, BA.1.1, BA.2, BA.2.12.1, BA.2.75, BA.3 and BA.4/5. Cryo-electron microscopy (cryo-EM) structure determination of the BA.1 spike-1H1 Fab complexes shows that 1H1 targets a highly conserved region of RBD and avoids most of the circulating Omicron mutations, explaining its broad-spectrum neutralization potency. Our findings indicate 1H1 as a promising RmAb model for designing broad-spectrum neutralizing antibodies and shed light on the development of therapeutic agents as well as effective vaccines against newly emerging variants in the future.
History
DepositionFeb 9, 2023-
Header (metadata) releaseApr 12, 2023-
Map releaseApr 12, 2023-
UpdateMay 8, 2024-
Current statusMay 8, 2024Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_35328.png

Downloads & links

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Map

FileDownload / File: emd_35328.map.gz / Format: CCP4 / Size: 512 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.82 Å/pix.
x 512 pix.
= 419.84 Å		0.82 Å/pix.
x 512 pix.
= 419.84 Å		0.82 Å/pix.
x 512 pix.
= 419.84 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.82 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.1906
Minimum - Maximum-1.4218746 - 2.4309688
Average (Standard dev.)-0.00059109903 (±0.04229881)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions512512512
Spacing512512512
CellA=B=C: 419.84 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #1

Fileemd_35328_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_35328_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : SARS-CoV-2 Omicron BA.1 spike glycoprotein complex with 1H1 IgG

EntireName: SARS-CoV-2 Omicron BA.1 spike glycoprotein complex with 1H1 IgG
Components
  • Complex: SARS-CoV-2 Omicron BA.1 spike glycoprotein complex with 1H1 IgG
    • Complex: Omicron BA.1 spike glycoprotein
      • Protein or peptide: SARS-CoV-2 Omicron BA.1 spike glycoprotein
    • Complex: 1H1 IgG

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Supramolecule #1: SARS-CoV-2 Omicron BA.1 spike glycoprotein complex with 1H1 IgG

SupramoleculeName: SARS-CoV-2 Omicron BA.1 spike glycoprotein complex with 1H1 IgG
type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2

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Supramolecule #2: Omicron BA.1 spike glycoprotein

SupramoleculeName: Omicron BA.1 spike glycoprotein / type: complex / ID: 2 / Parent: 1 / Macromolecule list: all
Details: SARS-CoV-2 Omicron BA.1 variant spike protein ectodomain
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2

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Supramolecule #3: 1H1 IgG

SupramoleculeName: 1H1 IgG / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #2-#3

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Macromolecule #1: SARS-CoV-2 Omicron BA.1 spike glycoprotein

MacromoleculeName: SARS-CoV-2 Omicron BA.1 spike glycoprotein / type: protein_or_peptide / ID: 1 / Enantiomer: LEVO
SequenceString: MFVFLVLLPL VSSQCVNLTT RTQLPPAYTN SFTRGVYYPD KVFRSSVLHS TQDLFLPFFS NVTWFHVISG TNGTKRFDNP VLPFNDGVYF ASIEKSNIIR GWIFGTTLDS KTQSLLIVNN ATNVVIKVCE FQFCNDPFLD HKNNKSWMES EFRVYSSANN CTFEYVSQPF ...String:
MFVFLVLLPL VSSQCVNLTT RTQLPPAYTN SFTRGVYYPD KVFRSSVLHS TQDLFLPFFS NVTWFHVISG TNGTKRFDNP VLPFNDGVYF ASIEKSNIIR GWIFGTTLDS KTQSLLIVNN ATNVVIKVCE FQFCNDPFLD HKNNKSWMES EFRVYSSANN CTFEYVSQPF LMDLEGKQGN FKNLREFVFK NIDGYFKIYS KHTPIIVREP EDLPQGFSAL EPLVDLPIGI NITRFQTLLA LHRSYLTPGD SSSGWTAGAA AYYVGYLQPR TFLLKYNENG TITDAVDCAL DPLSETKCTL KSFTVEKGIY QTSNFRVQPT ESIVRFPNIT NLCPFDEVFN ATRFASVYAW NRKRISNCVA DYSVLYNLAP FFTFKCYGVS PTKLNDLCFT NVYADSFVIR GDEVRQIAPG QTGNIADYNY KLPDDFTGCV IAWNSNKLDS KVSGNYNYLY RLFRKSNLKP FERDISTEIY QAGNKPCNGV AGFNCYFPLR SYSFRPTYGV GHQPYRVVVL SFELLHAPAT VCGPKKSTNL VKNKCVNFNF NGLKGTGVLT ESNKKFLPFQ QFGRDIADTT DAVRDPQTLE ILDITPCSFG GVSVITPGTN TSNQVAVLYQ GVNCTEVPVA IHADQLTPTW RVYSTGSNVF QTRAGCLIGA EYVNNSYECD IPIGAGICAS YQTQTKSHGS ASSVASQSII AYTMSLGAEN SVAYSNNSIA IPTNFTISVT TEILPVSMTK TSVDCTMYIC GDSTECSNLL LQYGSFCTQL KRALTGIAVE QDKNTQEVFA QVKQIYKTPP IKYFGGFNFS QILPDPSKPS KRSPIEDLLF NKVTLADAGF IKQYGDCLGD IAARDLICAQ KFKGLTVLPP LLTDEMIAQY TSALLAGTIT SGWTFGAGPA LQIPFPMQMA YRFNGIGVTQ NVLYENQKLI ANQFNSAIGK IQDSLSSTPS ALGKLQDVVN HNAQALNTLV KQLSSKFGAI SSVLNDIFSR LDPPEAEVQI DRLITGRLQS LQTYVTQQLI RAAEIRASAN LAATKMSECV LGQSKRVDFC GKGYHLMSFP QSAPHGVVFL HVTYVPAQEK NFTTAPAICH DGKAHFPREG VFVSNGTHWF VTQRNFYEPQ IITTDNTFVS GNCDVVIGIV NNTVYDPLQP ELDSFKEELD KYFKNHTSPD VDLGDISGIN ASVVNIQKEI DRLNEVAKNL NESLIDLQEL GKYEQGSGYI PEAPRDGQAY VRKDGEWVFL STFLSGLEVL FQGPGGWSHP QFEKGGGSGG GSGGSAWSHP QFEKGGSHHH HHHHH

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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: 7.4
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: 60.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: SPOT SCAN / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.8000000000000003 µm / Nominal defocus min: 1.2 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: NONE
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.68 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 130665
Initial angle assignmentType: COMMON LINE
Final angle assignmentType: COMMON LINE

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