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- EMDB-31577: Major cryo-EM structure of S protein trimer of SARS-CoV2 with K-8... -

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Basic information

Entry
Database: EMDB / ID: EMD-31577
TitleMajor cryo-EM structure of S protein trimer of SARS-CoV2 with K-874, composite map
Map dataMajor cryo-EM structure of S protein trimer of SARS-CoV2 with K-874 VHHs, composite map
Sample
  • Complex: Severe acute respiratory syndrome-related coronavirus
    • Protein or peptide: Spike glycoprotein
    • Protein or peptide: K-874A VHH
KeywordsAntibody / PROTEIN BINDING
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 / suppression by virus 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 / 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 / receptor-mediated endocytosis of virus by host cell / membrane fusion / 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
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-related coronavirus / Severe acute respiratory syndrome coronavirus 2 / Homo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.9 Å
AuthorsSong C / Katayama K / Murata K / Yokoyama M / Miyazaki N / Iwasaki K / Murakami K
Funding support Japan, 2 items
OrganizationGrant numberCountry
Japan Agency for Medical Research and Development (AMED)20fk0108295h0001 Japan
Japan Agency for Medical Research and Development (AMED)2833 Japan
CitationJournal: PLoS Pathog / Year: 2021
Title: Nasal delivery of single-domain antibody improves symptoms of SARS-CoV-2 infection in an animal model.
Authors: Kei Haga / Reiko Takai-Todaka / Yuta Matsumura / Chihong Song / Tomomi Takano / Takuto Tojo / Atsushi Nagami / Yuki Ishida / Hidekazu Masaki / Masayuki Tsuchiya / Toshiki Ebisudani / Shinya ...Authors: Kei Haga / Reiko Takai-Todaka / Yuta Matsumura / Chihong Song / Tomomi Takano / Takuto Tojo / Atsushi Nagami / Yuki Ishida / Hidekazu Masaki / Masayuki Tsuchiya / Toshiki Ebisudani / Shinya Sugimoto / Toshiro Sato / Hiroyuki Yasuda / Koichi Fukunaga / Akihito Sawada / Naoto Nemoto / Kazuyoshi Murata / Takuya Morimoto / Kazuhiko Katayama /
Abstract: The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) that causes the disease COVID-19 can lead to serious symptoms, such as severe pneumonia, in the elderly and those with underlying ...The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) that causes the disease COVID-19 can lead to serious symptoms, such as severe pneumonia, in the elderly and those with underlying medical conditions. While vaccines are now available, they do not work for everyone and therapeutic drugs are still needed, particularly for treating life-threatening conditions. Here, we showed nasal delivery of a new, unmodified camelid single-domain antibody (VHH), termed K-874A, effectively inhibited SARS-CoV-2 titers in infected lungs of Syrian hamsters without causing weight loss and cytokine induction. In vitro studies demonstrated that K-874A neutralized SARS-CoV-2 in both VeroE6/TMPRSS2 and human lung-derived alveolar organoid cells. Unlike other drug candidates, K-874A blocks viral membrane fusion rather than viral attachment. Cryo-electron microscopy revealed K-874A bound between the receptor binding domain and N-terminal domain of the virus S protein. Further, infected cells treated with K-874A produced fewer virus progeny that were less infective. We propose that direct administration of K-874A to the lung could be a new treatment for preventing the reinfection of amplified virus in COVID-19 patients.
History
DepositionJul 25, 2021-
Header (metadata) releaseSep 29, 2021-
Map releaseSep 29, 2021-
UpdateOct 30, 2024-
Current statusOct 30, 2024Processing site: PDBj / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.008
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.008
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7fg3
  • Surface level: 0.008
  • Imaged by UCSF Chimera
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  • Simplified surface model + fitted atomic model
  • Atomic modelsPDB-7fg3
  • Imaged by Jmol
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_31577.png

Downloads & links

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Map

FileDownload / File: emd_31577.map.gz / Format: CCP4 / Size: 67 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationMajor cryo-EM structure of S protein trimer of SARS-CoV2 with K-874 VHHs, composite map
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.42 Å/pix.
x 260 pix.
= 369.72 Å		1.42 Å/pix.
x 260 pix.
= 369.72 Å		1.42 Å/pix.
x 260 pix.
= 369.72 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.422 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.008 / Movie #1: 0.008
Minimum - Maximum-0.06779825 - 0.10398137
Average (Standard dev.)0.000017111046 (±0.0016319727)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin-1-1-1
Dimensions260260260
Spacing260260260
CellA=B=C: 369.72 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.4221.4221.422
M x/y/z260260260
origin x/y/z0.0000.0000.000
length x/y/z369.720369.720369.720
α/β/γ90.00090.00090.000
start NX/NY/NZ-220-220-220
NX/NY/NZ440440440
MAP C/R/S123
start NC/NR/NS-1-1-1
NC/NR/NS260260260
D min/max/mean-0.0680.1040.000

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Supplemental data

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Sample components

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Entire : Severe acute respiratory syndrome-related coronavirus

EntireName: Severe acute respiratory syndrome-related coronavirus
Components
  • Complex: Severe acute respiratory syndrome-related coronavirus
    • Protein or peptide: Spike glycoprotein
    • Protein or peptide: K-874A VHH

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Supramolecule #1: Severe acute respiratory syndrome-related coronavirus

SupramoleculeName: Severe acute respiratory syndrome-related coronavirus / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Severe acute respiratory syndrome-related coronavirus

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Macromolecule #1: Spike glycoprotein

MacromoleculeName: Spike glycoprotein / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Molecular weightTheoretical: 141.297422 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MFVFLVLLPL VSSQCVNLTT RTQLPPAYTN SFTRGVYYPD KVFRSSVLHS TQDLFLPFFS NVTWFHAIHV SGTNGTKRFD NPVLPFNDG VYFASTEKSN IIRGWIFGTT LDSKTQSLLI VNNATNVVIK VCEFQFCNDP FLGVYYHKNN KSWMESEFRV Y SSANNCTF ...String:
MFVFLVLLPL VSSQCVNLTT RTQLPPAYTN SFTRGVYYPD KVFRSSVLHS TQDLFLPFFS NVTWFHAIHV SGTNGTKRFD NPVLPFNDG VYFASTEKSN IIRGWIFGTT LDSKTQSLLI VNNATNVVIK VCEFQFCNDP FLGVYYHKNN KSWMESEFRV Y SSANNCTF EYVSQPFLMD LEGKQGNFKN LREFVFKNID GYFKIYSKHT PINLVRDLPQ GFSALEPLVD LPIGINITRF QT LLALHRS YLTPGDSSSG WTAGAAAYYV GYLQPRTFLL KYNENGTITD AVDCALDPLS ETKCTLKSFT VEKGIYQTSN FRV QPTESI VRFPNITNLC PFGEVFNATR FASVYAWNRK RISNCVADYS VLYNSASFST FKCYGVSPTK LNDLCFTNVY ADSF VIRGD EVRQIAPGQT GKIADYNYKL PDDFTGCVIA WNSNNLDSKV GGNYNYLYRL FRKSNLKPFE RDISTEIYQA GSTPC NGVE GFNCYFPLQS YGFQPTNGVG YQPYRVVVLS FELLHAPATV CGPKKSTNLV KNKCVNFNFN GLTGTGVLTE SNKKFL PFQ QFGRDIADTT DAVRDPQTLE ILDITPCSFG GVSVITPGTN TSNQVAVLYQ DVNCTEVPVA IHADQLTPTW RVYSTGS NV FQTRAGCLIG AEHVNNSYEC DIPIGAGICA SYQTQTNSPR RARSVASQSI IAYTMSLGAE NSVAYSNNSI AIPTNFTI S VTTEILPVSM TKTSVDCTMY ICGDSTECSN LLLQYGSFCT QLNRALTGIA VEQDKNTQEV FAQVKQIYKT PPIKDFGGF NFSQILPDPS KPSKRSFIED LLFNKVTLAD AGFIKQYGDC LGDIAARDLI CAQKFNGLTV LPPLLTDEMI AQYTSALLAG TITSGWTFG AGAALQIPFA MQMAYRFNGI GVTQNVLYEN QKLIANQFNS AIGKIQDSLS STASALGKLQ DVVNQNAQAL N TLVKQLSS NFGAISSVLN DILSRLDKVE AEVQIDRLIT GRLQSLQTYV TQQLIRAAEI RASANLAATK MSECVLGQSK RV DFCGKGY HLMSFPQSAP HGVVFLHVTY VPAQEKNFTT APAICHDGKA HFPREGVFVS NGTHWFVTQR NFYEPQIITT DNT FVSGNC DVVIGIVNNT VYDPLQPELD SFKEELDKYF KNHTSPDVDL GDISGINASV VNIQKEIDRL NEVAKNLNES LIDL QELGK YEQYIKWPWY IWLGFIAGLI AIVMVTIMLC CMTSCCSCLK GCCSCGSCCK FDEDDSEPVL KGVKLHYT

UniProtKB: Spike glycoprotein

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Macromolecule #2: K-874A VHH

MacromoleculeName: K-874A VHH / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 14.362724 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString:
AEVQLVESGG GQVETGGSLR LSCQASGSTF SDYVMAWFRQ RPGKEREFVA TISRNGGTTT YGSSVKGRFT ISRDNAKSTV YLQMNSLKP EDTAVYYCYA VGGDGDSWGQ GTQVTVSSEP KTPKPQSHHH HHH

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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
Sugar embeddingMaterial: amorphous ice
VitrificationCryogen name: ETHANE / Chamber humidity: 95 % / Chamber temperature: 277 K

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Electron microscopy

MicroscopeFEI TITAN KRIOS
TemperatureMin: 76.0 K / Max: 77.0 K
Image recordingFilm or detector model: FEI FALCON III (4k x 4k) / Digitization - Dimensions - Width: 4096 pixel / Digitization - Dimensions - Height: 4096 pixel / Digitization - Frames/image: 3-31 / Number real images: 6552 / Average exposure time: 4.6 sec. / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 100.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 0.1 mm / Nominal defocus max: 2.5 µm / Nominal defocus min: 1.0 µm / Nominal magnification: 75000
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: INSILICO MODEL
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.9 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.1) / Number images used: 115297
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3.1)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3.1)
Final 3D classificationSoftware - Name: RELION (ver. 2.0)

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Atomic model buiding 1

RefinementSpace: REAL / Protocol: FLEXIBLE FIT / Overall B value: 146
Output model

PDB-7fg3:
Major cryo-EM structure of S protein trimer of SARS-CoV2 with K-874, composite map

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