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- EMDB-9588: Trypsin-cleaved and low pH-treated SARS-CoV spike glycoprotein an... -

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Basic information

Entry
Database: EMDB / ID: EMD-9588
TitleTrypsin-cleaved and low pH-treated SARS-CoV spike glycoprotein and ACE2 complex, ACE2-free conformation with three RBD in down conformation
Map data
Sample
  • Complex: Trypsin-cleaved and low pH-treated SARS-CoV spike glycoprotein
    • Protein or peptide: Spike glycoproteinSpike protein
Function / homology
Function and homology information


Maturation of spike protein / Translation of Structural Proteins / Virion Assembly and Release / Attachment and Entry / suppression by virus of host tetherin activity / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / receptor-mediated virion attachment to host cell / host cell surface receptor binding / endocytosis involved in viral entry into host cell / fusion of virus membrane with host plasma membrane ...Maturation of spike protein / Translation of Structural Proteins / Virion Assembly and Release / Attachment and Entry / suppression by virus of host tetherin activity / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / receptor-mediated virion attachment to host cell / host cell surface receptor binding / endocytosis involved in viral entry into host cell / fusion of virus membrane with host plasma membrane / suppression by virus of host type I interferon-mediated signaling pathway / fusion of virus membrane with host endosome membrane / viral envelope / viral entry into host cell / host cell plasma membrane / virion membrane / integral component of 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. / Betacoronavirus spike (S) glycoprotein S1 subunit C-terminal (CTD) domain profile. / Spike glycoprotein, N-terminal domain superfamily / Spike glycoprotein, betacoronavirus / Spike S1 subunit, receptor binding domain superfamily, betacoronavirus / Betacoronavirus spike glycoprotein S1, receptor binding / Spike (S) protein S1 subunit, receptor-binding domain, betacoronavirus / Spike glycoprotein S2, coronavirus, heptad repeat 1 ...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. / Betacoronavirus spike (S) glycoprotein S1 subunit C-terminal (CTD) domain profile. / Spike glycoprotein, N-terminal domain superfamily / Spike glycoprotein, betacoronavirus / Spike S1 subunit, receptor binding domain superfamily, betacoronavirus / Betacoronavirus spike glycoprotein S1, receptor binding / Spike (S) protein S1 subunit, receptor-binding domain, betacoronavirus / Spike glycoprotein S2, coronavirus, heptad repeat 1 / Spike glycoprotein S2, coronavirus, heptad repeat 2 / Betacoronavirus-like spike glycoprotein S1, N-terminal / Spike glycoprotein S1, N-terminal domain, betacoronavirus-like / Coronavirus spike (S) glycoprotein S2 subunit heptad repeat 1 (HR1) region profile. / Spike glycoprotein S2 superfamily, coronavirus / Coronavirus spike glycoprotein S2 / Spike glycoprotein S2, coronavirus / Coronavirus spike glycoprotein S1, C-terminal / Coronavirus spike glycoprotein S1, C-terminal
Similarity search - Domain/homology
Biological speciesSARS coronavirus / Human SARS coronavirus
Methodsingle particle reconstruction / cryo EM / Resolution: 3.6 Å
AuthorsGui M / Song W
CitationJournal: PLoS Pathog / Year: 2018
Title: Cryo-EM structure of the SARS coronavirus spike glycoprotein in complex with its host cell receptor ACE2.
Authors: Wenfei Song / Miao Gui / Xinquan Wang / Ye Xiang /
Abstract: The trimeric SARS coronavirus (SARS-CoV) surface spike (S) glycoprotein consisting of three S1-S2 heterodimers binds the cellular receptor angiotensin-converting enzyme 2 (ACE2) and mediates fusion ...The trimeric SARS coronavirus (SARS-CoV) surface spike (S) glycoprotein consisting of three S1-S2 heterodimers binds the cellular receptor angiotensin-converting enzyme 2 (ACE2) and mediates fusion of the viral and cellular membranes through a pre- to postfusion conformation transition. Here, we report the structure of the SARS-CoV S glycoprotein in complex with its host cell receptor ACE2 revealed by cryo-electron microscopy (cryo-EM). The complex structure shows that only one receptor-binding domain of the trimeric S glycoprotein binds ACE2 and adopts a protruding "up" conformation. In addition, we studied the structures of the SARS-CoV S glycoprotein and its complexes with ACE2 in different in vitro conditions, which may mimic different conformational states of the S glycoprotein during virus entry. Disassociation of the S1-ACE2 complex from some of the prefusion spikes was observed and characterized. We also characterized the rosette-like structures of the clustered SARS-CoV S2 trimers in the postfusion state observed on electron micrographs. Structural comparisons suggested that the SARS-CoV S glycoprotein retains a prefusion architecture after trypsin cleavage into the S1 and S2 subunits and acidic pH treatment. However, binding to the receptor opens up the receptor-binding domain of S1, which could promote the release of the S1-ACE2 complex and S1 monomers from the prefusion spike and trigger the pre- to postfusion conformational transition.
History
DepositionJul 26, 2018-
Header (metadata) releaseAug 8, 2018-
Map releaseAug 8, 2018-
UpdateNov 6, 2019-
Current statusNov 6, 2019Processing site: PDBj / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 8
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 8
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-6acc
  • Surface level: 8
  • 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_9588.map.gz / Format: CCP4 / Size: 91.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesX (Sec.)Y (Row.)Z (Col.)
1.32 Å/pix.
x 288 pix.
= 380.16 Å
1.32 Å/pix.
x 288 pix.
= 380.16 Å
1.32 Å/pix.
x 288 pix.
= 380.16 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.32 Å
Density
Contour LevelBy AUTHOR: 8.0 / Movie #1: 8
Minimum - Maximum-35.224930000000001 - 52.521389999999997
Average (Standard dev.)-0.000000000000563 (±1.0)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderZYX
Origin000
Dimensions288288288
Spacing288288288
CellA=B=C: 380.16 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.321.321.32
M x/y/z288288288
origin x/y/z0.0000.0000.000
length x/y/z380.160380.160380.160
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ288288288
MAP C/R/S321
start NC/NR/NS000
NC/NR/NS288288288
D min/max/mean-35.22552.521-0.000

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Supplemental data

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Mask #1

Fileemd_9588_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Sample components

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Entire : Trypsin-cleaved and low pH-treated SARS-CoV spike glycoprotein

EntireName: Trypsin-cleaved and low pH-treated SARS-CoV spike glycoprotein
Components
  • Complex: Trypsin-cleaved and low pH-treated SARS-CoV spike glycoprotein
    • Protein or peptide: Spike glycoproteinSpike protein

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Supramolecule #1: Trypsin-cleaved and low pH-treated SARS-CoV spike glycoprotein

SupramoleculeName: Trypsin-cleaved and low pH-treated SARS-CoV spike glycoprotein
type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: SARS coronavirus
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
Molecular weightTheoretical: 400 KDa

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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: Human SARS coronavirus
Molecular weightTheoretical: 133.763422 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MFIFLLFLTL TSGSDLDRCT TFDDVQAPNY TQHTSSMRGV YYPDEIFRSD TLYLTQDLFL PFYSNVTGFH TINHTFGNPV IPFKDGIYF AATEKSNVVR GWVFGSTMNN KSQSVIIINN STNVVIRACN FELCDNPFFA VSKPMGTQTH TMIFDNAFNC T FEYISDAF ...String:
MFIFLLFLTL TSGSDLDRCT TFDDVQAPNY TQHTSSMRGV YYPDEIFRSD TLYLTQDLFL PFYSNVTGFH TINHTFGNPV IPFKDGIYF AATEKSNVVR GWVFGSTMNN KSQSVIIINN STNVVIRACN FELCDNPFFA VSKPMGTQTH TMIFDNAFNC T FEYISDAF SLDVSEKSGN FKHLREFVFK NKDGFLYVYK GYQPIDVVRD LPSGFNTLKP IFKLPLGINI TNFRAILTAF SP AQDIWGT SAAAYFVGYL KPTTFMLKYD ENGTITDAVD CSQNPLAELK CSVKSFEIDK GIYQTSNFRV VPSGDVVRFP NIT NLCPFG EVFNATKFPS VYAWERKKIS NCVADYSVLY NSTFFSTFKC YGVSATKLND LCFSNVYADS FVVKGDDVRQ IAPG QTGVI ADYNYKLPDD FMGCVLAWNT RNIDATSTGN YNYKYRYLRH GKLRPFERDI SNVPFSPDGK PCTPPALNCY WPLND YGFY TTTGIGYQPY RVVVLSFELL NAPATVCGPK LSTDLIKNQC VNFNFNGLTG TGVLTPSSKR FQPFQQFGRD VSDFTD SVR DPKTSEILDI SPCSFGGVSV ITPGTNASSE VAVLYQDVNC TDVSTAIHAD QLTPAWRIYS TGNNVFQTQA GCLIGAE HV DTSYECDIPI GAGICASYHT VSLLRSTSQK SIVAYTMSLG ADSSIAYSNN TIAIPTNFSI SITTEVMPVS MAKTSVDC N MYICGDSTEC ANLLLQYGSF CTQLNRALSG IAAEQDRNTR EVFAQVKQMY KTPTLKYFGG FNFSQILPDP LKPTKRSFI EDLLFNKVTL ADAGFMKQYG ECLGDINARD LICAQKFNGL TVLPPLLTDD MIAAYTAALV SGTATAGWTF GAGAALQIPF AMQMAYRFN GIGVTQNVLY ENQKQIANQF NKAISQIQES LTTTSTALGK LQDVVNQNAQ ALNTLVKQLS SNFGAISSVL N DILSRLDK VEAEVQIDRL ITGRLQSLQT YVTQQLIRAA EIRASANLAA TKMSECVLGQ SKRVDFCGKG YHLMSFPQAA PH GVVFLHV TYVPSQERNF TTAPAICHEG KAYFPREGVF VFNGTSWFIT QRNFFSPQII TTDNTFVSGN CDVVIGIINN TVY DPLQPE LDSFKEELDK YFKNHTSPDV DLGDISGINA SVVNIQKEID RLNEVAKNLN ESLIDLQELG KYEQYIKWPW SHPQ FEK

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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: 5.8
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 exposure time: 8.0 sec. / Average electron dose: 50.0 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Initial angle assignmentType: COMMON LINE
Final angle assignmentType: PROJECTION MATCHING
Final reconstructionApplied symmetry - Point group: C3 (3 fold cyclic) / Resolution.type: BY AUTHOR / Resolution: 3.6 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 1.4) / Number images used: 150269
FSC plot (resolution estimation)

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