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- EMDB-11204: Spike Protein of RaTG13 Bat Coronavirus in Closed Conformation -

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Basic information

Entry
Database: EMDB / ID: EMD-11204
TitleSpike Protein of RaTG13 Bat Coronavirus in Closed Conformation
Map data
Sample
  • Complex: RaTG13 Bat Coronavirus Spike Glycoprotein Ectodomain
    • Protein or peptide: Spike glycoprotein
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
KeywordsSARS-CoV-2 / Spike / Virus Glycoprotein / Coronavirus / VIRAL PROTEIN
Function / homology
Function and homology information


endocytosis involved in viral entry into host cell / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / receptor-mediated virion attachment to host cell / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / host cell plasma membrane / virion membrane / membrane
Similarity search - Function
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 (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 coronavirus 2 / Bat coronavirus RaTG13
Methodsingle particle reconstruction / cryo EM / Resolution: 3.1 Å
AuthorsWrobel AG / Benton DJ
Funding support United Kingdom, 2 items
OrganizationGrant numberCountry
The Francis Crick InstituteFC001078 United Kingdom
The Francis Crick InstituteFC001143 United Kingdom
CitationJournal: Nat Struct Mol Biol / Year: 2020
Title: SARS-CoV-2 and bat RaTG13 spike glycoprotein structures inform on virus evolution and furin-cleavage effects.
Authors: Antoni G Wrobel / Donald J Benton / Pengqi Xu / Chloë Roustan / Stephen R Martin / Peter B Rosenthal / John J Skehel / Steven J Gamblin /
Abstract: SARS-CoV-2 is thought to have emerged from bats, possibly via a secondary host. Here, we investigate the relationship of spike (S) glycoprotein from SARS-CoV-2 with the S protein of a closely related ...SARS-CoV-2 is thought to have emerged from bats, possibly via a secondary host. Here, we investigate the relationship of spike (S) glycoprotein from SARS-CoV-2 with the S protein of a closely related bat virus, RaTG13. We determined cryo-EM structures for RaTG13 S and for both furin-cleaved and uncleaved SARS-CoV-2 S; we compared these with recently reported structures for uncleaved SARS-CoV-2 S. We also biochemically characterized their relative stabilities and affinities for the SARS-CoV-2 receptor ACE2. Although the overall structures of human and bat virus S proteins are similar, there are key differences in their properties, including a more stable precleavage form of human S and about 1,000-fold tighter binding of SARS-CoV-2 to human receptor. These observations suggest that cleavage at the furin-cleavage site decreases the overall stability of SARS-CoV-2 S and facilitates the adoption of the open conformation that is required for S to bind to the ACE2 receptor.
History
DepositionJun 18, 2020-
Header (metadata) releaseJul 1, 2020-
Map releaseJul 1, 2020-
UpdateNov 13, 2024-
Current statusNov 13, 2024Processing site: PDBe / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.7
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.7
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-6zgf
  • Surface level: 0.7
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_11204.png

Downloads & links

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Map

FileDownload / File: emd_11204.map.gz / Format: CCP4 / Size: 244.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.08 Å/pix.
x 400 pix.
= 431.2 Å		1.08 Å/pix.
x 400 pix.
= 431.2 Å		1.08 Å/pix.
x 400 pix.
= 431.2 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.078 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.7 / Movie #1: 0.7
Minimum - Maximum-2.5703344 - 4.839896
Average (Standard dev.)0.0028458536 (±0.07169755)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions400400400
Spacing400400400
CellA=B=C: 431.19998 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.0781.0781.078
M x/y/z400400400
origin x/y/z0.0000.0000.000
length x/y/z431.200431.200431.200
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS400400400
D min/max/mean-2.5704.8400.003

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Supplemental data

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Mask #1

Fileemd_11204_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_11204_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_11204_half_map_2.map
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : RaTG13 Bat Coronavirus Spike Glycoprotein Ectodomain

EntireName: RaTG13 Bat Coronavirus Spike Glycoprotein Ectodomain
Components
  • Complex: RaTG13 Bat Coronavirus Spike Glycoprotein Ectodomain
    • Protein or peptide: Spike glycoprotein
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose

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Supramolecule #1: RaTG13 Bat Coronavirus Spike Glycoprotein Ectodomain

SupramoleculeName: RaTG13 Bat Coronavirus Spike Glycoprotein Ectodomain / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Molecular weightTheoretical: 500 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: Bat coronavirus RaTG13
Molecular weightTheoretical: 141.875578 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MGILPSPGMP ALLSLVSLLS VLLMGCVAET GMFVFLVLLP LVSSQCVNLT TRTQLPPAYT NSSTRGVYYP DKVFRSSVLH LTQDLFLPF FSNVTWFHAI HVSGTNGIKR FDNPVLPFND GVYFASTEKS NIIRGWIFGT TLDSKTQSLL IVNNATNVVI K VCEFQFCN ...String:
MGILPSPGMP ALLSLVSLLS VLLMGCVAET GMFVFLVLLP LVSSQCVNLT TRTQLPPAYT NSSTRGVYYP DKVFRSSVLH LTQDLFLPF FSNVTWFHAI HVSGTNGIKR FDNPVLPFND GVYFASTEKS NIIRGWIFGT TLDSKTQSLL IVNNATNVVI K VCEFQFCN DPFLGVYYHK NNKSWMESEF RVYSSANNCT FEYVSQPFLM DLEGKQGNFK NLREFVFKNI DGYFKIYSKH TP INLVRDL PPGFSALEPL VDLPIGINIT RFQTLLALHR SYLTPGDSSS GWTAGAAAYY VGYLQPRTFL LKYNENGTIT DAV DCALDP LSETKCTLKS FTVEKGIYQT SNFRVQPTDS IVRFPNITNL CPFGEVFNAT TFASVYAWNR KRISNCVADY SVLY NSTSF STFKCYGVSP TKLNDLCFTN VYADSFVITG DEVRQIAPGQ TGKIADYNYK LPDDFTGCVI AWNSKHIDAK EGGNF NYLY RLFRKANLKP FERDISTEIY QAGSKPCNGQ TGLNCYYPLY RYGFYPTDGV GHQPYRVVVL SFELLNAPAT VCGPKK STN LVKNKCVNFN FNGLTGTGVL TESNKKFLPF QQFGRDIADT TDAVRDPQTL EILDITPCSF GGVSVITPGT NTSNQVA VL YQDVNCTEVP VAIHADQLTP TWRVYSTGSN VFQTRAGCLI GAEHVNNSYE CDIPIGAGIC ASYQTQTNSR SVASQSII A YTMSLGAENS VAYSNNSIAI PTNFTISVTT EILPVSMTKT SVDCTMYICG DSTECSNLLL QYGSFCTQLN RALTGIAVE QDKNTQEVFA QVKQIYKTPP IKDFGGFNFS QILPDPSKPS KRSFIEDLLF NKVTLADAGF IKQYGDCLGD IAARDLICAQ KFNGLTVLP PLLTDEMIAQ YTSALLAGTI TSGWTFGAGA ALQIPFAMQM AYRFNGIGVT QNVLYENQKL IANQFNSAIG K IQDSLSST ASALGKLQDV VNQNAQALNT LVKQLSSNFG AISSVLNDIL SRLDPPEAEV QIDRLITGRL QSLQTYVTQQ LI RAAEIRA SANLAATKMS ECVLGQSKRV DFCGKGYHLM SFPQSAPHGV VFLHVTYVPA QEKNFTTAPA ICHDGKAHFP REG VFVSNG THWFVTQRNF YEPQIITTDN TFVSGSCDVV IGIVNNTVYD PLQPELDSFK EELDKYFKNH TSPDVDLGDI SGIN ASVVN IQKEIDRLNE VAKNLNESLI DLQELGKYEQ SGRENLYFQG GGGSGYIPEA PRDGQAYVRK DGEWVLLSTF LGHHH HHH

UniProtKB: Spike glycoprotein

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Macromolecule #6: 2-acetamido-2-deoxy-beta-D-glucopyranose

MacromoleculeName: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 6 / Number of copies: 27 / Formula: NAG
Molecular weightTheoretical: 221.208 Da
Chemical component information

ChemComp-NAG:
2-acetamido-2-deoxy-beta-D-glucopyranose

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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

Concentration0.1 mg/mL
BufferpH: 8
GridModel: Quantifoil R2/2 / Material: COPPER / Mesh: 200 / Support film - Material: CARBON / Support film - topology: CONTINUOUS
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK III

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Specialist opticsEnergy filter - Name: GIF Quantum LS / Energy filter - Slit width: 20 eV
Image recordingFilm or detector model: GATAN K2 QUANTUM (4k x 4k) / Detector mode: COUNTING / Average exposure time: 8.0 sec. / Average electron dose: 54.4 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 3.0 µm / Nominal defocus min: 1.5 µm
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 / In silico model: cryoSPARC Ab Initio
Final reconstructionApplied symmetry - Point group: C3 (3 fold cyclic) / Algorithm: FOURIER SPACE / Resolution.type: BY AUTHOR / Resolution: 3.1 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. 2.15) / Number images used: 62000
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. 2.15)
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial modelPDB ID:

6vxx


Chain - Chain ID: A / Chain - Source name: PDB / Chain - Initial model type: experimental model
RefinementSpace: REAL / Protocol: OTHER
Output model

PDB-6zgf:
Spike Protein of RaTG13 Bat Coronavirus in Closed Conformation

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