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- EMDB-22222: SARS-CoV-2 HexaPro S Two RBD up -

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Basic information

Entry
Database: EMDB / ID: EMD-22222
TitleSARS-CoV-2 HexaPro S Two RBD up
Map dataFull map sharpened
Sample
  • Complex: Prefusion-stabilized SARS-CoV-2 spike trimer with two RBDs up
    • Protein or peptide: SARS-CoV-2 HexaPro S
Biological speciesSevere acute respiratory syndrome coronavirus 2
Methodsingle particle reconstruction / cryo EM / Resolution: 3.2 Å
AuthorsWrapp D / Hsieh C-L / Goldsmith JA / 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: bioRxiv / Year: 2020
Title: Structure-based Design of Prefusion-stabilized SARS-CoV-2 Spikes.
Authors: Ching-Lin Hsieh / Jory A Goldsmith / Jeffrey M Schaub / Andrea M DiVenere / Hung-Che Kuo / Kamyab Javanmardi / Kevin C Le / Daniel Wrapp / Alison Gene-Wei Lee / Yutong Liu / Chia-Wei Chou / ...Authors: Ching-Lin Hsieh / Jory A Goldsmith / Jeffrey M Schaub / Andrea M DiVenere / Hung-Che Kuo / Kamyab Javanmardi / Kevin C Le / Daniel Wrapp / Alison Gene-Wei Lee / Yutong Liu / Chia-Wei Chou / Patrick O Byrne / Christy K Hjorth / Nicole V Johnson / John Ludes-Meyers / Annalee W Nguyen / Juyeon Park / Nianshuang Wang / Dzifa Amengor / Jennifer A Maynard / Ilya J Finkelstein / Jason S McLellan /
Abstract: The COVID-19 pandemic caused by the novel coronavirus SARS-CoV-2 has led to accelerated efforts to develop therapeutics, diagnostics, and vaccines to mitigate this public health emergency. A key ...The COVID-19 pandemic caused by the novel coronavirus SARS-CoV-2 has led to accelerated efforts to develop therapeutics, diagnostics, and vaccines to mitigate this public health emergency. A key target of these efforts is the spike (S) protein, a large trimeric class I fusion protein that is metastable and difficult to produce recombinantly in large quantities. Here, we designed and expressed over 100 structure-guided spike variants based upon a previously determined cryo-EM structure of the prefusion SARS-CoV-2 spike. Biochemical, biophysical and structural characterization of these variants identified numerous individual substitutions that increased protein yields and stability. The best variant, HexaPro, has six beneficial proline substitutions leading to ~10-fold higher expression than its parental construct and is able to withstand heat stress, storage at room temperature, and multiple freeze-thaws. A 3.2 Å-resolution cryo-EM structure of HexaPro confirmed that it retains the prefusion spike conformation. High-yield production of a stabilized prefusion spike protein will accelerate the development of vaccines and serological diagnostics for SARS-CoV-2.
History
DepositionJun 26, 2020-
Header (metadata) releaseJul 15, 2020-
Map releaseJul 15, 2020-
UpdateSep 30, 2020-
Current statusSep 30, 2020Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.15
  • Imaged by UCSF Chimera
  • Download
  • Surface view colored by cylindrical radius
  • Surface level: 0.15
  • Imaged by UCSF Chimera
  • Download
Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_22222.png

Downloads & links

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Map

FileDownload / File: emd_22222.map.gz / Format: CCP4 / Size: 307.5 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationFull map sharpened
Voxel sizeX=Y=Z: 1.08 Å
Density
Contour LevelBy AUTHOR: 0.15 / Movie #1: 0.15
Minimum - Maximum-0.90640354 - 1.8008655
Average (Standard dev.)-0.00047122283 (±0.03113756)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions432432432
Spacing432432432
CellA=B=C: 466.56003 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.081.081.08
M x/y/z432432432
origin x/y/z0.0000.0000.000
length x/y/z466.560466.560466.560
α/β/γ90.00090.00090.000
start NX/NY/NZ212211153
NX/NY/NZ80102186
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS432432432
D min/max/mean-0.9061.801-0.000

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Supplemental data

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Additional map: Full map unsharpened

Fileemd_22222_additional.map
AnnotationFull map unsharpened
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Additional map: Full map unsharpened

Fileemd_22222_additional_1.map
AnnotationFull map unsharpened
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half-map A

Fileemd_22222_half_map_1.map
AnnotationHalf-map A
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half-map B

Fileemd_22222_half_map_2.map
AnnotationHalf-map B
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : Prefusion-stabilized SARS-CoV-2 spike trimer with two RBDs up

EntireName: Prefusion-stabilized SARS-CoV-2 spike trimer with two RBDs up
Components
  • Complex: Prefusion-stabilized SARS-CoV-2 spike trimer with two RBDs up
    • Protein or peptide: SARS-CoV-2 HexaPro S

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Supramolecule #1: Prefusion-stabilized SARS-CoV-2 spike trimer with two RBDs up

SupramoleculeName: Prefusion-stabilized SARS-CoV-2 spike trimer with two RBDs up
type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Recombinant expressionOrganism: Homo sapiens (human)
Molecular weightExperimental: 600 KDa

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Macromolecule #1: SARS-CoV-2 HexaPro S

MacromoleculeName: SARS-CoV-2 HexaPro S / type: protein_or_peptide / ID: 1 / Enantiomer: LEVO
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MFVFLVLLPL VSSQCVNLTT RTQLPPAYTN SFTRGVYYPD KVFRSSVLHS TQDLFLPFFS NVTWFHAIHV SGTNGTKRFD NPVLPFNDGV YFASTEKSNI IRGWIFGTTL DSKTQSLLIV NNATNVVIKV CEFQFCNDPF LGVYYHKNNK SWMESEFRVY SSANNCTFEY ...String:
MFVFLVLLPL VSSQCVNLTT RTQLPPAYTN SFTRGVYYPD KVFRSSVLHS TQDLFLPFFS NVTWFHAIHV SGTNGTKRFD NPVLPFNDGV YFASTEKSNI IRGWIFGTTL DSKTQSLLIV NNATNVVIKV CEFQFCNDPF LGVYYHKNNK SWMESEFRVY SSANNCTFEY VSQPFLMDLE GKQGNFKNLR EFVFKNIDGY FKIYSKHTPI NLVRDLPQGF SALEPLVDLP IGINITRFQT LLALHRSYLT PGDSSSGWTA GAAAYYVGYL QPRTFLLKYN ENGTITDAVD CALDPLSETK CTLKSFTVEK GIYQTSNFRV QPTESIVRFP NITNLCPFGE VFNATRFASV YAWNRKRISN CVADYSVLYN SASFSTFKCY GVSPTKLNDL CFTNVYADSF VIRGDEVRQI APGQTGKIAD YNYKLPDDFT GCVIAWNSNN LDSKVGGNYN YLYRLFRKSN LKPFERDIST EIYQAGSTPC NGVEGFNCYF PLQSYGFQPT NGVGYQPYRV VVLSFELLHA PATVCGPKKS TNLVKNKCVN FNFNGLTGTG VLTESNKKFL PFQQFGRDIA DTTDAVRDPQ TLEILDITPC SFGGVSVITP GTNTSNQVAV LYQDVNCTEV PVAIHADQLT PTWRVYSTGS NVFQTRAGCL IGAEHVNNSY ECDIPIGAGI CASYQTQTNS PGSASSVASQ SIIAYTMSLG AENSVAYSNN SIAIPTNFTI SVTTEILPVS MTKTSVDCTM YICGDSTECS NLLLQYGSFC TQLNRALTGI AVEQDKNTQE VFAQVKQIYK TPPIKDFGGF NFSQILPDPS KPSKRSPIED LLFNKVTLAD AGFIKQYGDC LGDIAARDLI CAQKFNGLTV LPPLLTDEMI AQYTSALLAG TITSGWTFGA GPALQIPFPM QMAYRFNGIG VTQNVLYENQ KLIANQFNSA IGKIQDSLSS TPSALGKLQD VVNQNAQALN TLVKQLSSNF GAISSVLNDI LSRLDPPEAE VQIDRLITGR LQSLQTYVTQ QLIRAAEIRA SANLAATKMS ECVLGQSKRV DFCGKGYHLM SFPQSAPHGV VFLHVTYVPA QEKNFTTAPA ICHDGKAHFP REGVFVSNGT HWFVTQRNFY EPQIITTDNT FVSGNCDVVI GIVNNTVYDP LQPELDSFKE ELDKYFKNHT SPDVDLGDIS GINASVVNIQ KEIDRLNEVA KNLNESLIDL QELGKYEQGS GYIPEAPRDG QAYVRKDGEW VLLSTFLGRS LEVLFQGPGH HHHHHHHSAW SHPQFEKGGG SGGGGSGGSA WSHPQFEK

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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

Concentration0.35 mg/mL
BufferpH: 8
Component:
ConcentrationFormulaName
2.0 mMC4H11NO3Tris
200.0 mMNaClSodium chloridesodium chloride
0.02 %NaN3sodium azide
GridModel: C-flat-1.2/1.3 / Material: COPPER / Mesh: 400 / Pretreatment - Type: PLASMA CLEANING
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277.15 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 45.0 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 695490
CTF correctionSoftware - Name: Warp
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC / Number images used: 90274
FSC plot (resolution estimation)

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