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- EMDB-33456: Structure of SARS-CoV-2 Spike Protein with Engineered x3 Disulfid... -
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Open data
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Basic information
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Title | Structure of SARS-CoV-2 Spike Protein with Engineered x3 Disulfide (x3(D427C, V987C) and single Arg S1/S2 cleavage site), Locked-2 Conformation | ||||||||||||
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Function / homology | ![]() Maturation of spike protein / viral translation / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / suppression by virus of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / entry receptor-mediated virion attachment to host cell ...Maturation of spike protein / viral translation / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / suppression by virus of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / entry receptor-mediated virion attachment to host cell / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / receptor-mediated endocytosis of virus by host cell / Attachment and Entry / membrane fusion / positive regulation of viral entry into host cell / receptor-mediated virion attachment to host cell / receptor ligand activity / symbiont-mediated suppression of host innate immune response / host cell surface receptor binding / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / virion attachment to host cell / SARS-CoV-2 activates/modulates innate and adaptive immune responses / host cell plasma membrane / virion membrane / identical protein binding / membrane / plasma membrane Similarity search - Function | ||||||||||||
Biological species | ![]() ![]() | ||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.2 Å | ||||||||||||
![]() | Qu K / Chen Q / Ciazynska KA / Liu B / Zhang X / Wang J / He Y / Guan J / He J / Liu T ...Qu K / Chen Q / Ciazynska KA / Liu B / Zhang X / Wang J / He Y / Guan J / He J / Liu T / Carter AP / Xiong X / Briggs JAG | ||||||||||||
Funding support | European Union, ![]()
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![]() | ![]() Title: Engineered disulfide reveals structural dynamics of locked SARS-CoV-2 spike. Authors: Kun Qu / Qiuluan Chen / Katarzyna A Ciazynska / Banghui Liu / Xixi Zhang / Jingjing Wang / Yujie He / Jiali Guan / Jun He / Tian Liu / Xiaofei Zhang / Andrew P Carter / Xiaoli Xiong / John A G Briggs / ![]() ![]() ![]() ![]() Abstract: The spike (S) protein of SARS-CoV-2 has been observed in three distinct pre-fusion conformations: locked, closed and open. Of these, the function of the locked conformation remains poorly understood. ...The spike (S) protein of SARS-CoV-2 has been observed in three distinct pre-fusion conformations: locked, closed and open. Of these, the function of the locked conformation remains poorly understood. Here we engineered a SARS-CoV-2 S protein construct "S-R/x3" to arrest SARS-CoV-2 spikes in the locked conformation by a disulfide bond. Using this construct we determined high-resolution structures confirming that the x3 disulfide bond has the ability to stabilize the otherwise transient locked conformations. Structural analyses reveal that wild-type SARS-CoV-2 spike can adopt two distinct locked-1 and locked-2 conformations. For the D614G spike, based on which all variants of concern were evolved, only the locked-2 conformation was observed. Analysis of the structures suggests that rigidified domain D in the locked conformations interacts with the hinge to domain C and thereby restrains RBD movement. Structural change in domain D correlates with spike conformational change. We propose that the locked-1 and locked-2 conformations of S are present in the acidic high-lipid cellular compartments during virus assembly and egress. In this model, release of the virion into the neutral pH extracellular space would favour transition to the closed or open conformations. The dynamics of this transition can be altered by mutations that modulate domain D structure, as is the case for the D614G mutation, leading to changes in viral fitness. The S-R/x3 construct provides a tool for the further structural and functional characterization of the locked conformations of S, as well as how sequence changes might alter S assembly and regulation of receptor binding domain dynamics. | ||||||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 98.4 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 20.6 KB 20.6 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 12.7 KB | Display | ![]() |
Images | ![]() | 60.7 KB | ||
Others | ![]() ![]() | 141.3 MB 140.9 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 723.6 KB | Display | ![]() |
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Full document | ![]() | 723.2 KB | Display | |
Data in XML | ![]() | 20.4 KB | Display | |
Data in CIF | ![]() | 26.8 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7xu2MC ![]() 7xtzC ![]() 7xu0C ![]() 7xu1C ![]() 7xu3C ![]() 7xu4C ![]() 7xu5C ![]() 7xu6C C: citing same article ( M: atomic model generated by this map |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Voxel size | X=Y=Z: 1.061 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Half map: #2
File | emd_33456_half_map_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #1
File | emd_33456_half_map_2.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
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Sample components
-Entire : Severe acute respiratory syndrome coronavirus 2 Spike protein
Entire | Name: Severe acute respiratory syndrome coronavirus 2 Spike protein |
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Components |
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-Supramolecule #1: Severe acute respiratory syndrome coronavirus 2 Spike protein
Supramolecule | Name: Severe acute respiratory syndrome coronavirus 2 Spike protein type: complex / Chimera: Yes / ID: 1 / Parent: 0 / Macromolecule list: #1 |
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Source (natural) | Organism: ![]() ![]() |
Recombinant expression | Organism: ![]() |
-Macromolecule #1: Spike glycoprotein
Macromolecule | Name: Spike glycoprotein / type: protein_or_peptide / ID: 1 / Number of copies: 3 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 124.727242 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: ETGTQCVNLT TRTQLPPAYT NSFTRGVYYP DKVFRSSVLH STQDLFLPFF SNVTWFHAIH VSGTNGTKRF DNPVLPFNDG VYFASTEKS NIIRGWIFGT TLDSKTQSLL IVNNATNVVI KVCEFQFCND PFLGVYYHKN NKSWMESEFR VYSSANNCTF E YVSQPFLM ...String: ETGTQCVNLT TRTQLPPAYT NSFTRGVYYP DKVFRSSVLH STQDLFLPFF SNVTWFHAIH VSGTNGTKRF DNPVLPFNDG VYFASTEKS NIIRGWIFGT TLDSKTQSLL IVNNATNVVI KVCEFQFCND PFLGVYYHKN NKSWMESEFR VYSSANNCTF E YVSQPFLM DLEGKQGNFK NLREFVFKNI DGYFKIYSKH TPINLVRDLP QGFSALEPLV DLPIGINITR FQTLLALHRS YL TPGDSSS GWTAGAAAYY VGYLQPRTFL LKYNENGTIT DAVDCALDPL SETKCTLKSF TVEKGIYQTS NFRVQPTESI VRF PNITNL CPFGEVFNAT RFASVYAWNR KRISNCVADY SVLYNSASFS TFKCYGVSPT KLNDLCFTNV YADSFVIRGD EVRQ IAPGQ TGKIADYNYK LPCDFTGCVI AWNSNNLDSK VGGNYNYLYR LFRKSNLKPF ERDISTEIYQ AGSTPCNGVE GFNCY FPLQ SYGFQPTNGV GYQPYRVVVL SFELLHAPAT VCGPKKSTNL VKNKCVNFNF NGLTGTGVLT ESNKKFLPFQ QFGRDI ADT TDAVRDPQTL EILDITPCSF GGVSVITPGT NTSNQVAVLY QDVNCTEVPV AIHADQLTPT WRVYSTGSNV FQTRAGC LI GAEHVNNSYE CDIPIGAGIC ASYQTQTNSR SVASQSIIAY TMSLGAENSV AYSNNSIAIP TNFTISVTTE ILPVSMTK T SVDCTMYICG DSTECSNLLL QYGSFCTQLN RALTGIAVEQ DKNTQEVFAQ VKQIYKTPPI KDFGGFNFSQ ILPDPSKPS KRSFIEDLLF NKVTLADAGF IKQYGDCLGD IAARDLICAQ KFNGLTVLPP LLTDEMIAQY TSALLAGTIT SGWTFGAGAA LQIPFAMQM AYRFNGIGVT QNVLYENQKL IANQFNSAIG KIQDSLSSTA SALGKLQDVV NQNAQALNTL VKQLSSNFGA I SSVLNDIL SRLDKCEAEV QIDRLITGRL QSLQTYVTQQ LIRAAEIRAS ANLAATKMSE CVLGQSKRVD FCGKGYHLMS FP QSAPHGV VFLHVTYVPA QEKNFTTAPA ICHDGKAHFP REGVFVSNGT HWFVTQRNFY EPQIITTDNT FVSGNCDVVI GIV NNTVYD P |
-Macromolecule #3: 2-acetamido-2-deoxy-beta-D-glucopyranose
Macromolecule | Name: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 3 / Number of copies: 36 / Formula: NAG |
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Molecular weight | Theoretical: 221.208 Da |
Chemical component information | ![]() ChemComp-NAG: |
-Macromolecule #4: BILIVERDINE IX ALPHA
Macromolecule | Name: BILIVERDINE IX ALPHA / type: ligand / ID: 4 / Number of copies: 3 / Formula: BLA |
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Molecular weight | Theoretical: 582.646 Da |
Chemical component information | ![]() ChemComp-BLA: |
-Macromolecule #5: LINOLEIC ACID
Macromolecule | Name: LINOLEIC ACID / type: ligand / ID: 5 / Number of copies: 3 / Formula: EIC |
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Molecular weight | Theoretical: 280.445 Da |
Chemical component information | ![]() ChemComp-EIC: |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Concentration | 0.6 mg/mL |
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Buffer | pH: 7.4 |
Grid | Model: C-flat-2/2 / Support film - Material: CARBON / Support film - topology: HOLEY ARRAY / Pretreatment - Type: GLOW DISCHARGE |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 298 K |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Specialist optics | Energy filter - Name: GIF Quantum LS |
Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Number grids imaged: 1 / Number real images: 6642 / Average electron dose: 50.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.4 µm / Nominal defocus min: 1.0 µm / Nominal magnification: 81000 |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |