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- EMDB-22809: SARS-CoV-2 rS2d RBD-Down State Spike Protein Trimer -

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Basic information

Entry
Database: EMDB / ID: EMD-22809
TitleSARS-CoV-2 rS2d RBD-Down State Spike Protein Trimer
Map dataSharpened and filtered map
Sample
  • Complex: SARS-CoV-2 rS2d Down State Spike Protein Trimer
    • Protein or peptide: SARS-CoV-2 rS2d Down State Spike Protein Trimer
Biological speciesSevere acute respiratory syndrome coronavirus 2
Methodsingle particle reconstruction / negative staining / Resolution: 12.06 Å
AuthorsEdwards RJ / Mansouri K
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)AI145687 United States
CitationJournal: Nat Struct Mol Biol / Year: 2020
Title: Controlling the SARS-CoV-2 spike glycoprotein conformation.
Authors: Rory Henderson / Robert J Edwards / Katayoun Mansouri / Katarzyna Janowska / Victoria Stalls / Sophie M C Gobeil / Megan Kopp / Dapeng Li / Rob Parks / Allen L Hsu / Mario J Borgnia / Barton ...Authors: Rory Henderson / Robert J Edwards / Katayoun Mansouri / Katarzyna Janowska / Victoria Stalls / Sophie M C Gobeil / Megan Kopp / Dapeng Li / Rob Parks / Allen L Hsu / Mario J Borgnia / Barton F Haynes / Priyamvada Acharya /
Abstract: The coronavirus (CoV) spike (S) protein, involved in viral-host cell fusion, is the primary immunogenic target for virus neutralization and the current focus of many vaccine design efforts. The ...The coronavirus (CoV) spike (S) protein, involved in viral-host cell fusion, is the primary immunogenic target for virus neutralization and the current focus of many vaccine design efforts. The highly flexible S-protein, with its mobile domains, presents a moving target to the immune system. Here, to better understand S-protein mobility, we implemented a structure-based vector analysis of available β-CoV S-protein structures. Despite an overall similarity in domain organization, we found that S-proteins from different β-CoVs display distinct configurations. Based on this analysis, we developed two soluble ectodomain constructs for the SARS-CoV-2 S-protein, in which the highly immunogenic and mobile receptor binding domain (RBD) is either locked in the all-RBDs 'down' position or adopts 'up' state conformations more readily than the wild-type S-protein. These results demonstrate that the conformation of the S-protein can be controlled via rational design and can provide a framework for the development of engineered CoV S-proteins for vaccine applications.
History
DepositionOct 5, 2020-
Header (metadata) releaseOct 14, 2020-
Map releaseOct 14, 2020-
UpdateOct 21, 2020-
Current statusOct 21, 2020Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.05
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.05
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_22809.png

Downloads & links

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Map

FileDownload / File: emd_22809.map.gz / Format: CCP4 / Size: 3.4 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationSharpened and filtered map
Voxel sizeX=Y=Z: 4.02 Å
Density
Contour LevelBy AUTHOR: 0.05 / Movie #1: 0.05
Minimum - Maximum-0.11219442 - 0.17463996
Average (Standard dev.)0.00001240802 (±0.011519326)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions969696
Spacing969696
CellA=B=C: 385.91998 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z4.024.024.02
M x/y/z969696
origin x/y/z0.0000.0000.000
length x/y/z385.920385.920385.920
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ304304304
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS969696
D min/max/mean-0.1120.1750.000

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Supplemental data

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Mask #1

Fileemd_22809_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Additional map: Unsharpened map

Fileemd_22809_additional_1.map
AnnotationUnsharpened map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: half-map 1

Fileemd_22809_half_map_1.map
Annotationhalf-map 1
Projections & Slices
AxesZYX

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Histogram

Histogram (log scale)

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Half map: half-map 2

Fileemd_22809_half_map_2.map
Annotationhalf-map 2
Projections & Slices
AxesZYX

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Slices (1/2)
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Histogram

Histogram (log scale)

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Sample components

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Entire : SARS-CoV-2 rS2d Down State Spike Protein Trimer

EntireName: SARS-CoV-2 rS2d Down State Spike Protein Trimer
Components
  • Complex: SARS-CoV-2 rS2d Down State Spike Protein Trimer
    • Protein or peptide: SARS-CoV-2 rS2d Down State Spike Protein Trimer

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Supramolecule #1: SARS-CoV-2 rS2d Down State Spike Protein Trimer

SupramoleculeName: SARS-CoV-2 rS2d Down State Spike Protein Trimer / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Recombinant expressionOrganism: Homo sapiens (human) / Recombinant cell: 293F / Recombinant plasmid: p-alpha-H
Molecular weightTheoretical: 481.8 KDa

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Macromolecule #1: SARS-CoV-2 rS2d Down State Spike Protein Trimer

MacromoleculeName: SARS-CoV-2 rS2d Down State Spike Protein Trimer / type: protein_or_peptide / ID: 1 / Enantiomer: LEVO
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: VNLTTRTQLP PAYTNSFTRG VYYPDKVFRS SVLHSTQDLF LPFFSNVTWF HAIHVSGTNG TKRFDNPVLP FNDGVYFAST EKSNIIRGWI FGTTLDSKTQ SLLIVNNATN VVIKVCEFQF CNDPFLGVYY HKNNKSWMES EFRVYSSANN CTFEYVSQPF LMDLEGKQGN ...String:
VNLTTRTQLP PAYTNSFTRG VYYPDKVFRS SVLHSTQDLF LPFFSNVTWF HAIHVSGTNG TKRFDNPVLP FNDGVYFAST EKSNIIRGWI FGTTLDSKTQ SLLIVNNATN VVIKVCEFQF CNDPFLGVYY HKNNKSWMES EFRVYSSANN CTFEYVSQPF LMDLEGKQGN FKNLREFVFK NIDGYFKIYS KHTPINLVRD LPQGFSALEP LVDLPIGINI TRFQTLLALH RSYLTPGDSS SGWTAGAAAY YVGYLQPRTF LLKYNENGTI TDAVDCALDP LSETKCTLKS FTVEKGIYQT SNFRVQPTES IVRFPNITNL CPFGEVFNAT RFASVYAWNR KRISNCVADY SVLYNSASFS TFKCYGVCPT KLNDLCFTNV YADSFVIRGD EVRQIAPGQT GKIADYNYKL PDDFTGCVIA WNSNNLDSKV GGNYNYLYRL FRKSNLKPFE RDISTEIYQA GSTPCNGVEG FNCYFPLQSY GFQPTNGVGY QPYRVVVLSF ELLHAPATVC GPKKSTNLVK NKCVNFNFNG LTGTGVLTES NKKFLPFQQF GRDIADTTDA VRDPQTLEIL DITPCSFGGV SVITPGTNTS NQVAVLYQDV NCTEVPVAIH ADQLTPTWRV YSTGSNVFQT RAGCLIGAEH VNNSYECDIP IGAGICASYQ TQTNSPGSAS SVASQSIIAY TMSLGAENSV AYSNNSIAIP TNFTISVTTE ILPVSMTKTS VDCTMYICGD STECSNLLLQ YGSFCTQLNR ALTGIAVEQD KNTQEVFAQV KQIYKTPPIK DFGGFNFSQI LPDPSKPSKR SFIEDLLFNK VTLADAGFIK QYGDCLGDIA ARDLICAQKF NGLTVLPPLL TDEMIAQYTS ALLAGTITSG WTFGAGAALQ IPFAMQMAYR FNGIGVTQNV LYENQKLIAN QFNSAIGKIQ DSLSSTASAL GKLQDVVNQN AQALNTLVKQ LSSNFGAISS VLNDILSRLC PPEAEVQIDR LITGRLQSLQ TYVTQQLIRA AEIRASANLA ATKMSECVLG QSKRVDFCGK GYHLMSFPQS APHGVVFLHV TYVPAQEKNF TTAPAICHDG KAHFPREGVF VSNGTHWFVT QRNFYEPQII TTDNTFVSGN CDVVIGIVNN TVYDPLQPEL DSFKEELDKY FKNHTSPDVD LGDISGINAS VVNIQKEIDR LNEVAKNLNE SLIDLQELGK YEQGSGYIPE APRDGQAYVR KDGEWVLLST FLGRSLEVLF QGPGHHHHHH HHSAWSHPQF EKGGGSGGGG SGGSAWSHPQ FEK

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Experimental details

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Structure determination

Methodnegative staining
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration0.1 mg/mL
BufferpH: 7.4
Component:
ConcentrationFormulaName
150.0 mMNaClSodium chloridesodium chloride
20.0 mMHEPES buffer
5.0 g/dLglycerol
StainingType: NEGATIVE / Material: Uranyl Formate
Details: Samples were diluted to 0.1 mg/mL in 20 mM HEPES buffer, pH 7.4, with 5% glycerol, 150 mM NaCl, and 7.5 mM glutaraldehyde. After 5 minute incubation at room temperature, sufficient 1 M Tris ...Details: Samples were diluted to 0.1 mg/mL in 20 mM HEPES buffer, pH 7.4, with 5% glycerol, 150 mM NaCl, and 7.5 mM glutaraldehyde. After 5 minute incubation at room temperature, sufficient 1 M Tris stock, pH 7.4, was added to a final concentration of 75 mM Tris to quench unreacted glutaraldehyde, and was then incubated 5 minutes. Sample was then applied to a carbon film over 400 mesh copper EM grids that had been glow-discharged, incubated 1 minute, and then stained with 2% uranyl formate.
GridModel: Homemade / Material: COPPER / Mesh: 400 / Support film - Material: CARBON / Support film - topology: CONTINUOUS / Support film - Film thickness: 0.05 nm / Pretreatment - Type: GLOW DISCHARGE

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Electron microscopy

MicroscopeFEI/PHILIPS EM420
Electron beamAcceleration voltage: 120 kV / Electron source: LAB6
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Cs: 2.0 mm / Nominal defocus max: 1.5 µm / Nominal defocus min: 0.4 µm / Nominal magnification: 82000
Sample stageSpecimen holder model: SIDE ENTRY, EUCENTRIC
Image recordingFilm or detector model: OTHER / Digitization - Dimensions - Width: 2048 pixel / Digitization - Dimensions - Height: 2048 pixel / Digitization - Sampling interval: 33.0 µm / Number grids imaged: 1 / Number real images: 437 / Average exposure time: 0.5 sec. / Average electron dose: 32.0 e/Å2

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Image processing

CTF correctionSoftware - Name: CTFFIND (ver. 4.1.8)
Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

6vsb


Details: Map of PDB 6VSB was generated within Chimera using the molmap function at 15 Angstrom resolution and 4.02 Angstrom grid spacing. This map was low-pass filtered to 60 Angstrom before initiating refinements.
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3.0)
Final 3D classificationNumber classes: 3 / Avg.num./class: 20000 / Software - Name: RELION (ver. 3.0)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3.0)
Final reconstructionNumber classes used: 1 / Applied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 12.06 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.0) / Number images used: 45400
FSC plot (resolution estimation)

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