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- EMDB-17295: Stabilised BA.1 SARS-CoV-2 spike with H6 nanobodies in '3 up' RBD... -

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Basic information

Entry
Database: EMDB / ID: EMD-17295
TitleStabilised BA.1 SARS-CoV-2 spike with H6 nanobodies in '3 up' RBD conformation
Map datasharpened map
Sample
  • Complex: Complex of stabilised HexaPro Omicron BA.1 spike trimer with three H6 nanobodies
    • Complex: H6 nanobody
      • Protein or peptide: H6 nanobody
    • Complex: Stabilised HexaPro Omicron BA.1 spike trimer
      • Protein or peptide: Spike glycoprotein,Fibritin
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
KeywordsNanobody / Complex / SARS-CoV-2 / spike / VIRAL PROTEIN
Function / homology
Function and homology information


virion component / 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 ...virion component / 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
Fibritin C-terminal / Fibritin C-terminal region / 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. ...Fibritin C-terminal / Fibritin C-terminal region / 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
Spike glycoprotein / Fibritin
Similarity search - Component
Biological speciesLama glama (llama) / Severe acute respiratory syndrome coronavirus 2 / Tequatrovirus T4
Methodsingle particle reconstruction / cryo EM / Resolution: 3.8 Å
AuthorsWeckener M / Naismith JH / Owens RJ
Funding support United Kingdom, 1 items
OrganizationGrant numberCountry
Wellcome Trust223733/Z/21/Z United Kingdom
CitationJournal: Open Biol / Year: 2024
Title: Structural and functional characterization of nanobodies that neutralize Omicron variants of SARS-CoV-2.
Authors: Katy Cornish / Jiandong Huo / Luke Jones / Parul Sharma / Joseph W Thrush / Sahar Abdelkarim / Anja Kipar / Siva Ramadurai / Miriam Weckener / Halina Mikolajek / Sai Liu / Imogen Buckle / ...Authors: Katy Cornish / Jiandong Huo / Luke Jones / Parul Sharma / Joseph W Thrush / Sahar Abdelkarim / Anja Kipar / Siva Ramadurai / Miriam Weckener / Halina Mikolajek / Sai Liu / Imogen Buckle / Eleanor Bentley / Adam Kirby / Ximeng Han / Stephen M Laidlaw / Michelle Hill / Lauren Eyssen / Chelsea Norman / Audrey Le Bas / John Clarke / William James / James P Stewart / Miles Carroll / James H Naismith / Raymond J Owens /
Abstract: The Omicron strains of SARS-CoV-2 pose a significant challenge to the development of effective antibody-based treatments as immune evasion has compromised most available immune therapeutics. ...The Omicron strains of SARS-CoV-2 pose a significant challenge to the development of effective antibody-based treatments as immune evasion has compromised most available immune therapeutics. Therefore, in the 'arms race' with the virus, there is a continuing need to identify new biologics for the prevention or treatment of SARS-CoV-2 infections. Here, we report the isolation of nanobodies that bind to the Omicron BA.1 spike protein by screening nanobody phage display libraries previously generated from llamas immunized with either the Wuhan or Beta spike proteins. The structure and binding properties of three of these nanobodies (A8, H6 and B5-5) have been characterized in detail providing insight into their binding epitopes on the Omicron spike protein. Trimeric versions of H6 and B5-5 neutralized the SARS-CoV-2 variant of concern BA.5 both and in the hamster model of COVID-19 following nasal administration. Thus, either alone or in combination could serve as starting points for the development of new anti-viral immunotherapeutics.
History
DepositionMay 5, 2023-
Header (metadata) releaseJul 3, 2024-
Map releaseJul 3, 2024-
UpdateJul 3, 2024-
Current statusJul 3, 2024Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_17295.png

Downloads & links

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Map

FileDownload / File: emd_17295.map.gz / Format: CCP4 / Size: 103 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Annotationsharpened map
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.2 Å/pix.
x 300 pix.
= 360. Å		1.2 Å/pix.
x 300 pix.
= 360. Å		1.2 Å/pix.
x 300 pix.
= 360. Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.2 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.0026
Minimum - Maximum-0.06983803 - 0.14293818
Average (Standard dev.)0.00042551622 (±0.0043063555)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions300300300
Spacing300300300
CellA=B=C: 360.0 Å
α=β=γ: 90.0 °

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Supplemental data

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Additional map: refined unsharpened map

Fileemd_17295_additional_1.map
Annotationrefined unsharpened map
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: half1 map

Fileemd_17295_half_map_1.map
Annotationhalf1 map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: half2 map

Fileemd_17295_half_map_2.map
Annotationhalf2 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 : Complex of stabilised HexaPro Omicron BA.1 spike trimer with thre...

EntireName: Complex of stabilised HexaPro Omicron BA.1 spike trimer with three H6 nanobodies
Components
  • Complex: Complex of stabilised HexaPro Omicron BA.1 spike trimer with three H6 nanobodies
    • Complex: H6 nanobody
      • Protein or peptide: H6 nanobody
    • Complex: Stabilised HexaPro Omicron BA.1 spike trimer
      • Protein or peptide: Spike glycoprotein,Fibritin
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose

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Supramolecule #1: Complex of stabilised HexaPro Omicron BA.1 spike trimer with thre...

SupramoleculeName: Complex of stabilised HexaPro Omicron BA.1 spike trimer with three H6 nanobodies
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#2

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Supramolecule #2: H6 nanobody

SupramoleculeName: H6 nanobody / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #2
Source (natural)Organism: Lama glama (llama)

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Supramolecule #3: Stabilised HexaPro Omicron BA.1 spike trimer

SupramoleculeName: Stabilised HexaPro Omicron BA.1 spike trimer / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #1
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2

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Macromolecule #1: Spike glycoprotein,Fibritin

MacromoleculeName: Spike glycoprotein,Fibritin / type: protein_or_peptide / ID: 1 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Tequatrovirus T4
Molecular weightTheoretical: 140.083672 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MFVFLVLLPL VSSQCVNLTT RTQLPPAYTN SFTRGVYYPD KVFRSSVLHS TQDLFLPFFS NVTWFHVIHV SGTNGTKRFD NPVLPFNDG VYFASIEKSN IIRGWIFGTT LDSKTQSLLI VNNATNVVIK VCEFQFCNDP FLDVYHKNNK SWMESEFRVY S SANNCTFE ...String:
MFVFLVLLPL VSSQCVNLTT RTQLPPAYTN SFTRGVYYPD KVFRSSVLHS TQDLFLPFFS NVTWFHVIHV SGTNGTKRFD NPVLPFNDG VYFASIEKSN IIRGWIFGTT LDSKTQSLLI VNNATNVVIK VCEFQFCNDP FLDVYHKNNK SWMESEFRVY S SANNCTFE YVSQPFLMDL EGKQGNFKNL REFVFKNIDG YFKIYSKHTP INIVREPEDL PQGFSALEPL VDLPIGINIT RF QTLLALH RSYLTPGDSS SGWTAGAAAY YVGYLQPRTF LLKYNENGTI TDAVDCALDP LSETKCTLKS FTVEKGIYQT SNF RVQPTE SIVRFPNITN LCPFDEVFNA TRFASVYAWN RKRISNCVAD YSVLYNLAPF FTFKCYGVSP TKLNDLCFTN VYAD SFVIR GDEVRQIAPG QTGNIADYNY KLPDDFTGCV IAWNSNKLDS KVSGNYNYLY RLFRKSNLKP FERDISTEIY QAGNK PCNG VAGFNCYFPL KSYSFRPTYG VGHQPYRVVV LSFELLHAPA TVCGPKKSTN LVKNKCVNFN FNGLKGTGVL TESNKK FLP FQQFGRDIAD TTDAVRDPQT LEILDITPCS FGGVSVITPG TNTSNQVAVL YQGVNCTEVP VAIHADQLTP TWRVYST GS NVFQTRAGCL IGAEYVNNSY ECDIPIGAGI CASYQTQTKS HGSASSVASQ SIIAYTMSLG AENSVAYSNN SIAIPTNF T ISVTTEILPV SMTKTSVDCT MYICGDSTEC SNLLLQYGSF CTQLKRALTG IAVEQDKNTQ EVFAQVKQIY KTPPIKYFG GFNFSQILPD PSKPSKRSPI EDLLFNKVTL ADAGFIKQYG DCLGDIAARD LICAQKFKGL TVLPPLLTDE MIAQYTSALL AGTITSGWT FGAGPALQIP FPMQMAYRFN GIGVTQNVLY ENQKLIANQF NSAIGKIQDS LSSTPSALGK LQDVVNHNAQ A LNTLVKQL SSKFGAISSV LNDIFSRLDP PEAEVQIDRL ITGRLQSLQT YVTQQLIRAA EIRASANLAA TKMSECVLGQ SK RVDFCGK GYHLMSFPQS APHGVVFLHV TYVPAQEKNF TTAPAICHDG KAHFPREGVF VSNGTHWFVT QRNFYEPQII TTD NTFVSG NCDVVIGIVN NTVYDPLQPE LDSFKEELDK YFKNHTSPDV DLGDISGINA SVVNIQKEID RLNEVAKNLN ESLI DLQEL GKYEQGSGYI PEAPRDGQAY VRKDGEWVLL STFLGRSLEV LFQGPGHHHH HHHH

UniProtKB: Spike glycoprotein, Fibritin

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Macromolecule #2: H6 nanobody

MacromoleculeName: H6 nanobody / type: protein_or_peptide / ID: 2 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Lama glama (llama)
Molecular weightTheoretical: 14.588144 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
QVQLVESGGG LVQPGGSLTL SCVASESSLA PYRVAWFRQA PGKEREGVSC ISRDAHPTST YYTASVKGRF TMSRDNAKNT VYLQMNSLK PSDTAVYYCA TDLGGYCSDS NYPRAWWGQG TQVTVSSKHH HHHH

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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

Concentration1 mg/mL
BufferpH: 7.5 / Details: PBS
GridModel: Quantifoil R1.2/1.3 / Material: GOLD / Mesh: 200 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 30 sec.
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 40.5 e/Å2
Electron beamAcceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 3.0 µm / Nominal defocus min: 1.5 µm
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

7qo7

Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.8 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 104001
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial model
PDB IDChain

7qo7

source_name: PDB, initial_model_type: experimental model

8owv

source_name: PDB, initial_model_type: experimental model
Output model

PDB-8oyt:
Stabilised BA.1 SARS-CoV-2 spike with H6 nanobodies in '3 up' RBD conformation

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