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- EMDB-32868: Local refinement of the SARS-CoV-2 BA.1 Spike trimer in complex w... -

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Basic information

Entry
Database: EMDB / ID: EMD-32868
TitleLocal refinement of the SARS-CoV-2 BA.1 Spike trimer in complex with 55A8 Fab
Map data
Sample
  • Complex: SARS-CoV-2 Omicron spike RBD complex with 55A8 Fab
    • Complex: Omicron spike RBD
      • Protein or peptide: Spike glycoprotein
    • Complex: 55A8 Fab
      • Protein or peptide: 55A8 light chain
      • Protein or peptide: 55A8 light chain
KeywordsVIRAL PROTEIN-IMMUNE SYSTEM complex
Function / homology
Function and homology information


symbiont-mediated disruption of host tissue / Maturation of spike protein / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular region / symbiont-mediated-mediated suppression of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / positive regulation of viral entry into host cell ...symbiont-mediated disruption of host tissue / Maturation of spike protein / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular region / symbiont-mediated-mediated suppression of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / positive regulation of viral entry into host cell / membrane fusion / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / Attachment and Entry / entry receptor-mediated virion attachment to host cell / receptor-mediated virion attachment to host cell / host cell surface receptor binding / symbiont-mediated suppression of host innate immune response / endocytosis involved in viral entry into host cell / receptor ligand activity / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / symbiont entry into host cell / virion attachment to host cell / host cell plasma membrane / SARS-CoV-2 activates/modulates innate and adaptive immune responses / virion membrane / membrane / identical protein binding / 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, 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 glycoprotein S1, N-terminal domain, betacoronavirus-like / Betacoronavirus-like spike glycoprotein S1, N-terminal ...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, 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 glycoprotein S1, N-terminal domain, betacoronavirus-like / Betacoronavirus-like spike glycoprotein S1, N-terminal / 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 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: 3.4 Å
AuthorsGuo H / Gao Y
Funding support China, 1 items
OrganizationGrant numberCountry
Other government China
CitationJournal: To Be Published
Title: Local refinement of the SARS-CoV-2 BA.1 Spike trimer in complex with 55A8 Fab
Authors: Guo H / Gao Y / Lu Y / Yang H / Ji X
History
DepositionFeb 13, 2022-
Header (metadata) releaseFeb 15, 2023-
Map releaseFeb 15, 2023-
UpdateJul 2, 2025-
Current statusJul 2, 2025Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_32868.png

Downloads & links

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Map

FileDownload / File: emd_32868.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: 0.4206
Minimum - Maximum-0.6586523 - 2.0801125
Average (Standard dev.)-0.0025735921 (±0.027973838)
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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Sample components

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Entire : SARS-CoV-2 Omicron spike RBD complex with 55A8 Fab

EntireName: SARS-CoV-2 Omicron spike RBD complex with 55A8 Fab
Components
  • Complex: SARS-CoV-2 Omicron spike RBD complex with 55A8 Fab
    • Complex: Omicron spike RBD
      • Protein or peptide: Spike glycoprotein
    • Complex: 55A8 Fab
      • Protein or peptide: 55A8 light chain
      • Protein or peptide: 55A8 light chain

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Supramolecule #1: SARS-CoV-2 Omicron spike RBD complex with 55A8 Fab

SupramoleculeName: SARS-CoV-2 Omicron spike RBD complex with 55A8 Fab / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all / Details: RBD-Fab local refinement
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2

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Supramolecule #2: Omicron spike RBD

SupramoleculeName: Omicron spike RBD / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1
Details: SARS-CoV-2 Omicron variant spike protein receptor-binding domain
Source (natural)Organism: Homo sapiens (human)

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Supramolecule #3: 55A8 Fab

SupramoleculeName: 55A8 Fab / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #2-#3
Details: Fab fragment generated by proteolytic cleavage of IgG antibody

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Macromolecule #1: Spike glycoprotein

MacromoleculeName: Spike glycoprotein / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Molecular weightTheoretical: 22.065934 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: NLCPFDEVFN ATRFASVYAW NRKRISNCVA DYSVLYNLAP FFTFKCYGVS PTKLNDLCFT NVYADSFVIR GDEVRQIAPG QTGNIADYN YKLPDDFTGC VIAWNSNKLD SKVSGNYNYL YRLFRKSNLK PFERDISTEI YQAGNKPCNG VAGFNCYFPL R SYSFRPTY ...String:
NLCPFDEVFN ATRFASVYAW NRKRISNCVA DYSVLYNLAP FFTFKCYGVS PTKLNDLCFT NVYADSFVIR GDEVRQIAPG QTGNIADYN YKLPDDFTGC VIAWNSNKLD SKVSGNYNYL YRLFRKSNLK PFERDISTEI YQAGNKPCNG VAGFNCYFPL R SYSFRPTY GVGHQPYRVV VLSFELLHAP ATVCGP

UniProtKB: Spike glycoprotein

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Macromolecule #2: 55A8 light chain

MacromoleculeName: 55A8 light chain / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 11.868181 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString:
DIQMTQSPST LSASVGDRVT ITCRASQSIS SWLAWYQQKP GKAPKLLIYK ASSLESGVPS RFSGSGSGTE FTLTISSLQP DDFATYYCQ QYNSYSHTFG QGTKLEIKR

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Macromolecule #3: 55A8 light chain

MacromoleculeName: 55A8 light chain / type: protein_or_peptide / ID: 3 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 13.12665 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString:
QVQLVQSGAE VKKPGSSVKV SCKASGGTFS SYSFIWVRQA PGQGLEWMGR IIPILGIANY AQKFQGRVTI TADKSTTTAY MELSSLRSE DTAVYYCARG TEYGDYDVSH DWGQGTLVTV SS

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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

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: NONE
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.4 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 181072
Initial angle assignmentType: COMMON LINE
Final angle assignmentType: COMMON LINE

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