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- EMDB-48148: Cryo-EM structure of SARS-CoV-2 Omicron KP.3.1.1 spike RBD and NT... -

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Basic information

Entry
Database: EMDB / ID: EMD-48148
TitleCryo-EM structure of SARS-CoV-2 Omicron KP.3.1.1 spike RBD and NTD (local refinement of RBD and NTD)
Map data
Sample
  • Complex: SARS-CoV-2 Omicron KP.3.1.1 Spike RBD with NTD
    • Protein or peptide: Spike protein S1
    • Protein or peptide: Spike protein S1
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
KeywordsSARS-CoV-2 / COVID-19 / Spike / RBD / 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 / symbiont-mediated-mediated suppression 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 / symbiont-mediated-mediated suppression of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / entry receptor-mediated virion attachment to host cell / membrane fusion / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / Attachment and Entry / 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: 3.71 Å
AuthorsFeng Z / Huang J / Ward AB
Funding support United States, 1 items
OrganizationGrant numberCountry
Bill & Melinda Gates FoundationINV-004923 United States
CitationJournal: To Be Published
Title: Structure of SARS-CoV-2 KP.3.1.1 Spike Protein
Authors: Feng Z
History
DepositionDec 4, 2024-
Header (metadata) releaseMay 28, 2025-
Map releaseMay 28, 2025-
UpdateMay 28, 2025-
Current statusMay 28, 2025Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_48148.png

Downloads & links

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Map

FileDownload / File: emd_48148.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.)
0.72 Å/pix.
x 512 pix.
= 367.616 Å		0.72 Å/pix.
x 512 pix.
= 367.616 Å		0.72 Å/pix.
x 512 pix.
= 367.616 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.718 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.18
Minimum - Maximum-0.88835084 - 1.3149093
Average (Standard dev.)-0.00023415287 (±0.012752774)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions512512512
Spacing512512512
CellA=B=C: 367.616 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_48148_msk_1.map
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_48148_half_map_1.map
Projections & Slices
AxesZYX

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Histogram

Histogram (log scale)

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Half map: #1

Fileemd_48148_half_map_2.map
Projections & Slices
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Sample components

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Entire : SARS-CoV-2 Omicron KP.3.1.1 Spike RBD with NTD

EntireName: SARS-CoV-2 Omicron KP.3.1.1 Spike RBD with NTD
Components
  • Complex: SARS-CoV-2 Omicron KP.3.1.1 Spike RBD with NTD
    • Protein or peptide: Spike protein S1
    • Protein or peptide: Spike protein S1
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose

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Supramolecule #1: SARS-CoV-2 Omicron KP.3.1.1 Spike RBD with NTD

SupramoleculeName: SARS-CoV-2 Omicron KP.3.1.1 Spike RBD with NTD / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#2
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2

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Macromolecule #1: Spike protein S1

MacromoleculeName: Spike protein S1 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2 / Strain: Omicron KP.3.1.1
Molecular weightTheoretical: 32.357543 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MFVFLVLLPL VSSQCVNLIT TTQSYTNFTR GVYYPDKVFR SSVLHLTQDL FLPFFSNVTW FHAISGTNGT KRFDNPVLPF NDGVYFAST EKSNIIRGWI FGTTLDSKTQ SLLIVNNATN VFIKVCEFQF CNDPFLDVYH KNNKSWMESE SGVYSSANNC T FEYVSQPF ...String:
MFVFLVLLPL VSSQCVNLIT TTQSYTNFTR GVYYPDKVFR SSVLHLTQDL FLPFFSNVTW FHAISGTNGT KRFDNPVLPF NDGVYFAST EKSNIIRGWI FGTTLDSKTQ SLLIVNNATN VFIKVCEFQF CNDPFLDVYH KNNKSWMESE SGVYSSANNC T FEYVSQPF LMDLEGKQGN FKNLREFVFK NIDGYFKIYS KHTPIIGRDF PQGFSALEPL VDLPIGINIT RFQTLLALNR SY LTPGDSS SGWTAGAADY YVGYLQPRTF LLKYNENGTI TDAVDCAL

UniProtKB: Spike glycoprotein

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Macromolecule #2: Spike protein S1

MacromoleculeName: Spike protein S1 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2 / Strain: Omicron KP.3.1.1
Molecular weightTheoretical: 30.795889 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: FRVQPTESIV RFPNVTNLCP FHEVFNATRF ASVYAWNRTR ISNCVADYSV LYNFAPFFAF KCYGVSPTKL NDLCFTNVYA DSFVIKGNE VSQIAPGQTG NIADYNYKLP DDFTGCVIAW NSNKLDSKHS GNYDYWYRSL RKSKLKPFER DISTEIYQAG N KPCKGKGP ...String:
FRVQPTESIV RFPNVTNLCP FHEVFNATRF ASVYAWNRTR ISNCVADYSV LYNFAPFFAF KCYGVSPTKL NDLCFTNVYA DSFVIKGNE VSQIAPGQTG NIADYNYKLP DDFTGCVIAW NSNKLDSKHS GNYDYWYRSL RKSKLKPFER DISTEIYQAG N KPCKGKGP NCYFPLESYG FRPTYGVGHQ PYRVVVLSFE LLHAPATVCG PKKSTNLVKN KCVNFNFNGL TGTGVLTKSN KK FLPFQQF GRDIVDTTDA VRDPQTLEIL DITPC

UniProtKB: Spike glycoprotein

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Macromolecule #4: 2-acetamido-2-deoxy-beta-D-glucopyranose

MacromoleculeName: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 4 / Number of copies: 9 / 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

BufferpH: 7.4
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS GLACIOS
Image recordingFilm or detector model: FEI FALCON IV (4k x 4k) / Average electron dose: 44.84 e/Å2
Electron beamAcceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.7 µm / Nominal defocus min: 0.7000000000000001 µm

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Image processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: INSILICO MODEL
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.71 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 98127
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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