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- EMDB-6703: Prefusion structure of SARS-CoV spike glycoprotein, conformation 1 -

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Basic information

Entry
Database: EMDB / ID: EMD-6703
TitlePrefusion structure of SARS-CoV spike glycoprotein, conformation 1
Map data
Sample
  • Complex: SARS-CoV spike trimer
    • Protein or peptide: Spike glycoproteinSpike protein
  • Ligand: N-ACETYL-D-GLUCOSAMINEN-Acetylglucosamine
Function / homology
Function and homology information


Maturation of spike protein / Translation of Structural Proteins / Virion Assembly and Release / Attachment and Entry / endocytosis involved in viral entry into host cell / SARS-CoV-1 activates/modulates innate immune responses / suppression by virus of host tetherin activity / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / membrane fusion / positive regulation of viral entry into host cell ...Maturation of spike protein / Translation of Structural Proteins / Virion Assembly and Release / Attachment and Entry / endocytosis involved in viral entry into host cell / SARS-CoV-1 activates/modulates innate immune responses / suppression by virus of host tetherin activity / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / membrane fusion / positive regulation of viral entry into host cell / receptor-mediated virion attachment to host cell / host cell surface receptor binding / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / symbiont-mediated suppression of host type I interferon-mediated signaling pathway / host cell plasma membrane / virion membrane / membrane / identical protein binding
Similarity search - Function
Spike (S) protein S1 subunit, receptor-binding domain, SARS-CoV / Spike (S) protein S1 subunit, N-terminal domain, SARS-CoV-like / Betacoronavirus spike (S) glycoprotein S1 subunit N-terminal (NTD) domain profile. / Spike glycoprotein, N-terminal domain superfamily / Betacoronavirus spike (S) glycoprotein S1 subunit C-terminal (CTD) domain profile. / Spike glycoprotein, betacoronavirus / 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 ...Spike (S) protein S1 subunit, receptor-binding domain, SARS-CoV / Spike (S) protein S1 subunit, N-terminal domain, SARS-CoV-like / Betacoronavirus spike (S) glycoprotein S1 subunit N-terminal (NTD) domain profile. / Spike glycoprotein, N-terminal domain superfamily / Betacoronavirus spike (S) glycoprotein S1 subunit C-terminal (CTD) domain profile. / Spike glycoprotein, betacoronavirus / 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 2 (HR2) region profile. / Coronavirus spike (S) glycoprotein S2 subunit heptad repeat 1 (HR1) region profile. / Spike glycoprotein S2 superfamily, coronavirus / Spike glycoprotein S2, coronavirus / Coronavirus spike glycoprotein S2 / Coronavirus spike glycoprotein S1, C-terminal / Coronavirus spike glycoprotein S1, C-terminal
Similarity search - Domain/homology
Biological speciesSARS coronavirus BJ01
Methodsingle particle reconstruction / cryo EM / Resolution: 3.2 Å
AuthorsYuan Y / Cao D / Zhang Y / Ma J / Qi J / Wang Q / Lu G / Wu Y / Yan J / Shi Y ...Yuan Y / Cao D / Zhang Y / Ma J / Qi J / Wang Q / Lu G / Wu Y / Yan J / Shi Y / Zhang X / Gao GF
CitationJournal: Nat Commun / Year: 2017
Title: Cryo-EM structures of MERS-CoV and SARS-CoV spike glycoproteins reveal the dynamic receptor binding domains.
Authors: Yuan Yuan / Duanfang Cao / Yanfang Zhang / Jun Ma / Jianxun Qi / Qihui Wang / Guangwen Lu / Ying Wu / Jinghua Yan / Yi Shi / Xinzheng Zhang / George F Gao /
Abstract: The envelope spike (S) proteins of MERS-CoV and SARS-CoV determine the virus host tropism and entry into host cells, and constitute a promising target for the development of prophylactics and ...The envelope spike (S) proteins of MERS-CoV and SARS-CoV determine the virus host tropism and entry into host cells, and constitute a promising target for the development of prophylactics and therapeutics. Here, we present high-resolution structures of the trimeric MERS-CoV and SARS-CoV S proteins in its pre-fusion conformation by single particle cryo-electron microscopy. The overall structures resemble that from other coronaviruses including HKU1, MHV and NL63 reported recently, with the exception of the receptor binding domain (RBD). We captured two states of the RBD with receptor binding region either buried (lying state) or exposed (standing state), demonstrating an inherently flexible RBD readily recognized by the receptor. Further sequence conservation analysis of six human-infecting coronaviruses revealed that the fusion peptide, HR1 region and the central helix are potential targets for eliciting broadly neutralizing antibodies.
History
DepositionFeb 15, 2017-
Header (metadata) releaseMay 3, 2017-
Map releaseMay 3, 2017-
UpdateMay 3, 2017-
Current statusMay 3, 2017Processing site: PDBj / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.0456
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.0456
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-5x58
  • Surface level: 0.0456
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

Downloads & links

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Map

FileDownload / File: emd_6703.map.gz / Format: CCP4 / Size: 30.5 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Voxel sizeX=Y=Z: 1.3 Å
Density
Contour LevelBy AUTHOR: 0.0456 / Movie #1: 0.0456
Minimum - Maximum-0.18206844 - 0.3090062
Average (Standard dev.)-0.0000168226 (±0.011694076)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin-100-100-100
Dimensions200200200
Spacing200200200
CellA=B=C: 260.0 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.31.31.3
M x/y/z200200200
origin x/y/z0.0000.0000.000
length x/y/z260.000260.000260.000
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS-100-100-100
NC/NR/NS200200200
D min/max/mean-0.1820.309-0.000

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Supplemental data

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Sample components

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Entire : SARS-CoV spike trimer

EntireName: SARS-CoV spike trimer
Components
  • Complex: SARS-CoV spike trimer
    • Protein or peptide: Spike glycoproteinSpike protein
  • Ligand: N-ACETYL-D-GLUCOSAMINEN-Acetylglucosamine

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Supramolecule #1: SARS-CoV spike trimer

SupramoleculeName: SARS-CoV spike trimer / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1
Source (natural)Organism: SARS coronavirus BJ01 / Strain: BJ01
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)

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Macromolecule #1: Spike glycoprotein

MacromoleculeName: Spike glycoprotein / type: protein_or_peptide / ID: 1 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: SARS coronavirus BJ01 / Strain: BJ01
Molecular weightTheoretical: 136.825891 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: SDLDRCTTFD DVQAPNYTQH TSSMRGVYYP DEIFRSDTLY LTQDLFLPFY SNVTGFHTIN HTFDNPVIPF KDGIYFAATE KSNVVRGWV FGSTMNNKSQ SVIIINNSTN VVIRACNFEL CDNPFFAVSK PMGTQTHTMI FDNAFNCTFE YISDAFSLDV S EKSGNFKH ...String:
SDLDRCTTFD DVQAPNYTQH TSSMRGVYYP DEIFRSDTLY LTQDLFLPFY SNVTGFHTIN HTFDNPVIPF KDGIYFAATE KSNVVRGWV FGSTMNNKSQ SVIIINNSTN VVIRACNFEL CDNPFFAVSK PMGTQTHTMI FDNAFNCTFE YISDAFSLDV S EKSGNFKH LREFVFKNKD GFLYVYKGYQ PIDVVRDLPS GFNTLKPIFK LPLGINITNF RAILTAFSPA QDTWGTSAAA YF VGYLKPT TFMLKYDENG TITDAVDCSQ NPLAELKCSV KSFEIDKGIY QTSNFRVVPS GDVVRFPNIT NLCPFGEVFN ATK FPSVYA WERKKISNCV ADYSVLYNST FFSTFKCYGV SATKLNDLCF SNVYADSFVV KGDDVRQIAP GQTGVIADYN YKLP DDFMG CVLAWNTRNI DATSTGNYNY KYRYLRHGKL RPFERDISNV PFSPDGKPCT PPALNCYWPL NDYGFYTTTG IGYQP YRVV VLSFELLNAP ATVCGPKLST DLIKNQCVNF NFNGLTGTGV LTPSSKRFQP FQQFGRDVSD FTDSVRDPKT SEILDI SPC SFGGVSVITP GTNASSEVAV LYQDVNCTDV STAIHADQLT PAWRIYSTGN NVFQTQAGCL IGAEHVDTSY ECDIPIG AG ICASYHTVSL LRSTSQKSIV AYTMSLGADS SIAYSNNTIA IPTNFSISIT TEVMPVSMAK TSVDCNMYIC GDSTECAN L LLQYGSFCTQ LNRALSGIAA EQDRNTREVF AQVKQMYKTP TLKYFGGFNF SQILPDPLKP TKRSFIEDLL FNKVTLADA GFMKQYGECL GDINARDLIC AQKFNGLTVL PPLLTDDMIA AYTAALVSGT ATAGWTFGAG AALQIPFAMQ MAYRFNGIGV TQNVLYENQ KQIANQFNKA ISQIQESLTT TSTALGKLQD VVNQNAQALN TLVKQLSSNF GAISSVLNDI LSRLDKVEAE V QIDRLITG RLQSLQTYVT QQLIRAAEIR ASANLAATKM SECVLGQSKR VDFCGKGYHL MSFPQAAPHG VVFLHVTYVP SQ ERNFTTA PAICHEGKAY FPREGVFVFN GTSWFITQRN FFSPQIITTD NTFVSGNCDV VIGIINNTVY DPLQPELDSF KEE LDKYFK NHTSPDVDLG DISGINASVV NIQKEIDRLN EVAKNLNESL IDLQELGKYE QYIKIKRMKQ IEDKIEEIES KQKK IENEI ARIKKIKLVP RGSLEWSHPQ FEK

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Macromolecule #2: N-ACETYL-D-GLUCOSAMINE

MacromoleculeName: N-ACETYL-D-GLUCOSAMINE / type: ligand / ID: 2 / Number of copies: 42 / Formula: NAG
Molecular weightTheoretical: 221.208 Da

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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: 7.5
VitrificationCryogen name: ETHANE

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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 K2 SUMMIT (4k x 4k) / Average electron dose: 8.0 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Initial angle assignmentType: PROJECTION MATCHING
Final angle assignmentType: PROJECTION MATCHING
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 60000
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial model
PDB IDChain

chain_id: E, residue_range: 323-502

chain_id: A, residue_range: 18-278
RefinementProtocol: RIGID BODY FIT
Output model

PDB-5x58:
Prefusion structure of SARS-CoV spike glycoprotein, conformation 1

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