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- EMDB-43315: SARS-CoV-2 spike omicron (BA.1) RBD ectodomain dimer-of-trimers i... -

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Basic information

Entry
Database: EMDB / ID: EMD-43315
TitleSARS-CoV-2 spike omicron (BA.1) RBD ectodomain dimer-of-trimers in complex with SC27 Fabs
Map data
Sample
  • Complex: SARS-CoV-2 spike omicron (BA.1) RBD ectodomain dimer-of-trimers in complex with SC27 Fabs
    • Protein or peptide: SC27 Fab heavy chain
    • Protein or peptide: SC27 Fab light chain
    • Protein or peptide: Spike glycoprotein
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
KeywordsSARS-CoV-2 / coronavirus / S / spike / BA.1 / omicron / RBD / COVID-19 / antibody / SC27 / Fab / virus / 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 / 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 speciesHomo sapiens (human) / Severe acute respiratory syndrome coronavirus 2
Methodsingle particle reconstruction / cryo EM / Resolution: 3.1 Å
AuthorsByrne PO / McLellan JS
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)R01-AI127521 United States
CitationJournal: Cell Rep Med / Year: 2024
Title: Hybrid immunity to SARS-CoV-2 arises from serological recall of IgG antibodies distinctly imprinted by infection or vaccination.
Authors: William N Voss / Michael A Mallory / Patrick O Byrne / Jeffrey M Marchioni / Sean A Knudson / John M Powers / Sarah R Leist / Bernadeta Dadonaite / Douglas R Townsend / Jessica Kain / Yimin ...Authors: William N Voss / Michael A Mallory / Patrick O Byrne / Jeffrey M Marchioni / Sean A Knudson / John M Powers / Sarah R Leist / Bernadeta Dadonaite / Douglas R Townsend / Jessica Kain / Yimin Huang / Ed Satterwhite / Izabella N Castillo / Melissa Mattocks / Chelsea Paresi / Jennifer E Munt / Trevor Scobey / Allison Seeger / Lakshmanane Premkumar / Jesse D Bloom / George Georgiou / Jason S McLellan / Ralph S Baric / Jason J Lavinder / Gregory C Ippolito /
Abstract: We describe the molecular-level composition of polyclonal immunoglobulin G (IgG) anti-spike antibodies from ancestral severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, ...We describe the molecular-level composition of polyclonal immunoglobulin G (IgG) anti-spike antibodies from ancestral severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, vaccination, or their combination ("hybrid immunity") at monoclonal resolution. Infection primarily triggers S2/N-terminal domain (NTD)-reactive antibodies, whereas vaccination mainly induces anti-receptor-binding domain (RBD) antibodies. This imprint persists after secondary exposures wherein >60% of ensuing hybrid immunity derives from the original IgG pool. Monoclonal constituents of the original IgG pool can increase breadth, affinity, and prevalence upon secondary exposures, as exemplified by the plasma antibody SC27. Following a breakthrough infection, vaccine-induced SC27 gained neutralization breadth and potency against SARS-CoV-2 variants and zoonotic viruses (half-maximal inhibitory concentration [IC] ∼0.1-1.75 nM) and increased its binding affinity to the protective RBD class 1/4 epitope (dissociation constant [K] < 5 pM). According to polyclonal escape analysis, SC27-like binding patterns are common in SARS-CoV-2 hybrid immunity. Our findings provide a detailed molecular definition of immunological imprinting and show that vaccination can produce class 1/4 (SC27-like) IgG antibodies circulating in the blood.
History
DepositionJan 9, 2024-
Header (metadata) releaseJul 24, 2024-
Map releaseJul 24, 2024-
UpdateMay 28, 2025-
Current statusMay 28, 2025Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_43315.png

Downloads & links

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Map

FileDownload / File: emd_43315.map.gz / Format: CCP4 / Size: 1000 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.94 Å/pix.
x 640 pix.
= 601.6 Å		0.94 Å/pix.
x 640 pix.
= 601.6 Å		0.94 Å/pix.
x 640 pix.
= 601.6 Å

Surface

Projections

Slices (1/3)

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Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.94 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.27
Minimum - Maximum-1.4613733 - 2.1413293
Average (Standard dev.)-0.00033294465 (±0.022235805)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions640640640
Spacing640640640
CellA=B=C: 601.6 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #1

Fileemd_43315_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_43315_half_map_2.map
Projections & Slices
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Histogram

Histogram (log scale)

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Sample components

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Entire : SARS-CoV-2 spike omicron (BA.1) RBD ectodomain dimer-of-trimers i...

EntireName: SARS-CoV-2 spike omicron (BA.1) RBD ectodomain dimer-of-trimers in complex with SC27 Fabs
Components
  • Complex: SARS-CoV-2 spike omicron (BA.1) RBD ectodomain dimer-of-trimers in complex with SC27 Fabs
    • Protein or peptide: SC27 Fab heavy chain
    • Protein or peptide: SC27 Fab light chain
    • Protein or peptide: Spike glycoprotein
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose

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Supramolecule #1: SARS-CoV-2 spike omicron (BA.1) RBD ectodomain dimer-of-trimers i...

SupramoleculeName: SARS-CoV-2 spike omicron (BA.1) RBD ectodomain dimer-of-trimers in complex with SC27 Fabs
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#3

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Macromolecule #1: SC27 Fab heavy chain

MacromoleculeName: SC27 Fab heavy chain / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 27.684369 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MRPTWAWWLF LVLLLALWAP ARGQVTLKES GPVLLKPTET LTLTCTVSGF SLSNVGMGVS WIRQPPGKAL EWLADIFSND EKSYSTSLK SRLTISRDTS KSQVVLSMTN MDPVDTATYY CARLANYDFW SGYSRFSAQF DNWGQGTLVT VSSASTKGPS V FPLAPSSK ...String:
MRPTWAWWLF LVLLLALWAP ARGQVTLKES GPVLLKPTET LTLTCTVSGF SLSNVGMGVS WIRQPPGKAL EWLADIFSND EKSYSTSLK SRLTISRDTS KSQVVLSMTN MDPVDTATYY CARLANYDFW SGYSRFSAQF DNWGQGTLVT VSSASTKGPS V FPLAPSSK STSGGTAALG CLVKDYFPEP VTVSWNSGAL TSGVHTFPAV LQSSGLYSLS SVVTVPSSSL GTQTYICNVN HK PSNTKVD KKVEPKSCD

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Macromolecule #2: SC27 Fab light chain

MacromoleculeName: SC27 Fab light chain / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 25.018736 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MGWSCIILFL VATATGVHSQ SVLTQPPSVS GAPGQRVTIS CTGSSSNIGA GYDVHWYQQL PGTAPKLLIY DNNNRPSGVP DRFSGSKSG TSASLAITGL QAEDEADYYC QSFDSSSLTG SRVFGGGTKL TVLGQPKAAP SVTLFPPSSE ELQANKATLV C LISDFYPG ...String:
MGWSCIILFL VATATGVHSQ SVLTQPPSVS GAPGQRVTIS CTGSSSNIGA GYDVHWYQQL PGTAPKLLIY DNNNRPSGVP DRFSGSKSG TSASLAITGL QAEDEADYYC QSFDSSSLTG SRVFGGGTKL TVLGQPKAAP SVTLFPPSSE ELQANKATLV C LISDFYPG AVTVAWKADS SPVKAGVETT TPSKQSNNKY AASSYLSLTP EQWKSHRSYS CQVTHEGSTV EKTVAPTECS

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Macromolecule #3: Spike glycoprotein

MacromoleculeName: Spike glycoprotein / type: protein_or_peptide / ID: 3 / Details: omicron (BA.1) variant / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Molecular weightTheoretical: 144.927859 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: METDTLLLWV LLLWVPGSTG DMFVFLVLLP LVSSQCVNLT TRTQLPPAYT NSFTRGVYYP DKVFRSSVLH STQDLFLPFF SNVTWFHVI SGTNGTKRFD NPVLPFNDGV YFASIEKSNI IRGWIFGTTL DSKTQSLLIV NNATNVVIKV CEFQFCNDPF L DHKNNKSW ...String:
METDTLLLWV LLLWVPGSTG DMFVFLVLLP LVSSQCVNLT TRTQLPPAYT NSFTRGVYYP DKVFRSSVLH STQDLFLPFF SNVTWFHVI SGTNGTKRFD NPVLPFNDGV YFASIEKSNI IRGWIFGTTL DSKTQSLLIV NNATNVVIKV CEFQFCNDPF L DHKNNKSW MESEFRVYSS ANNCTFEYVS QPFLMDLEGK QGNFKNLREF VFKNIDGYFK IYSKHTPIIV REPEDLPQGF SA LEPLVDL PIGINITRFQ TLLALHRSYL TPGDSSSGWT AGAAAYYVGY LQPRTFLLKY NENGTITDAV DCALDPLSET KCT LKSFTV EKGIYQTSNF RVQPTESIVR FPNITNLCPF DEVFNATRFA SVYAWNRKRI SNCVADYSVL YNLAPFFTFK CYGV SPTKL NDLCFTNVYA DSFVIRGDEV RQIAPGQTGN IADYNYKLPD DFTGCVIAWN SNKLDSKVSG NYNYLYRLFR KSNLK PFER DISTEIYQAG NKPCNGVAGF NCYFPLRSYS FRPTYGVGHQ PYRVVVLSFE LLHAPATVCG PKKSTNLVKN KCVNFN FNG LKGTGVLTES NKKFLPFQQF GRDIADTTDA VRDPQTLEIL DITPCSFGGV SVITPGTNTS NQVAVLYQGV NCTEVPV AI HADQLTPTWR VYSTGSNVFQ TRAGCLIGAE YVNNSYECDI PIGAGICASY QTQTKSHGSA SSVASQSIIA YTMSLGAE N SVAYSNNSIA IPTNFTISVT TEILPVSMTK TSVDCTMYIC GDSTECSNLL LQYGSFCTQL KRALTGIAVE QDKNTQEVF AQVKQIYKTP PIKYFGGFNF SQILPDPSKP SKRSPIEDLL FNKVTLADAG FIKQYGDCLG DIAARDLICA QKFKGLTVLP PLLTDEMIA QYTSALLAGT ITSGWTFGAG PALQIPFPMQ MAYRFNGIGV TQNVLYENQK LIANQFNSAI GKIQDSLSST P SALGKLQD VVNHNAQALN TLVKQLSSKF GAISSVLNDI FSRLDPPEAE VQIDRLITGR LQSLQTYVTQ QLIRAAEIRA SA NLAATKM SECVLGQSKR VDFCGKGYHL MSFPQSAPHG VVFLHVTYVP AQEKNFTTAP AICHDGKAHF PREGVFVSNG THW FVTQRN FYEPQIITTD NTFVSGNCDV VIGIVNNTVY DPLQPELDSF KEELDKYFKN HTSPDVDLGD ISGINASVVN IQKE IDRLN EVAKNLNESL IDLQELGKYE QGSGYIPEAP RDGQAYVRKD GEWVLLSTFL GRSLEVLFQG PGHHHHHHHH SAWSH PQFE KGGGSGGGGS GGSAWSHPQF EK

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: 2 / 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: 8
Component:
ConcentrationName
2.0 mMTris
200.0 mMsodium chloride
0.02 percent (w/v)sodium azide
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: 49.0 e/Å2
Electron beamAcceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.8 µm / Nominal defocus min: 0.7000000000000001 µm

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Image processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: NONE
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.1 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 330320
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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