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- EMDB-30999: Cryo-EM structure of the SARS-CoV-2 wild-type S-Trimer from a sub... -

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Basic information

Entry
Database: EMDB / ID: EMD-30999
TitleCryo-EM structure of the SARS-CoV-2 wild-type S-Trimer from a subunit vaccine candidate
Map data
Sample
  • Complex: SARS-CoV-2 spike protein fused to the C-terminal region of human type 1a collagen
    • Protein or peptide: Spike glycoprotein,Collagen alpha-1(I) chain
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: 9-OCTADECENOIC ACID
Function / homology
Function and homology information


cellular response to fluoride / collagen type I trimer / tooth mineralization / cellular response to vitamin E / bone trabecula formation / Anchoring fibril formation / Crosslinking of collagen fibrils / collagen biosynthetic process / Collagen chain trimerization / extracellular matrix structural constituent conferring tensile strength ...cellular response to fluoride / collagen type I trimer / tooth mineralization / cellular response to vitamin E / bone trabecula formation / Anchoring fibril formation / Crosslinking of collagen fibrils / collagen biosynthetic process / Collagen chain trimerization / extracellular matrix structural constituent conferring tensile strength / platelet-derived growth factor binding / intramembranous ossification / embryonic skeletal system development / Extracellular matrix organization / cartilage development involved in endochondral bone morphogenesis / Collagen biosynthesis and modifying enzymes / skin morphogenesis / collagen-activated tyrosine kinase receptor signaling pathway / Platelet Adhesion to exposed collagen / endochondral ossification / cellular response to fibroblast growth factor stimulus / Scavenging by Class A Receptors / collagen fibril organization / face morphogenesis / negative regulation of cell-substrate adhesion / response to steroid hormone / skin development / Assembly of collagen fibrils and other multimeric structures / MET activates PTK2 signaling / Syndecan interactions / GP1b-IX-V activation signalling / blood vessel development / RUNX2 regulates osteoblast differentiation / Platelet Aggregation (Plug Formation) / Collagen degradation / Non-integrin membrane-ECM interactions / protein localization to nucleus / ECM proteoglycans / response to hyperoxia / positive regulation of epithelial to mesenchymal transition / Integrin cell surface interactions / response to mechanical stimulus / cellular response to retinoic acid / response to cAMP / cellular response to epidermal growth factor stimulus / GPVI-mediated activation cascade / cellular response to transforming growth factor beta stimulus / visual perception / extracellular matrix organization / ossification / secretory granule / skeletal system development / cellular response to glucose stimulus / cellular response to amino acid stimulus / Cell surface interactions at the vascular wall / sensory perception of sound / response to insulin / response to hydrogen peroxide / osteoblast differentiation / cellular response to mechanical stimulus / positive regulation of canonical Wnt signaling pathway / Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell / protein transport / response to estradiol / cellular response to tumor necrosis factor / collagen-containing extracellular matrix / 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 / protease binding / structural constituent of virion / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / entry receptor-mediated virion attachment to host cell / 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 / host cell surface receptor binding / positive regulation of cell migration / response to xenobiotic stimulus / fusion of virus membrane with host plasma membrane / endoplasmic reticulum lumen / fusion of virus membrane with host endosome membrane / viral envelope / symbiont-mediated suppression of host type I interferon-mediated signaling pathway / virion attachment to host cell / SARS-CoV-2 activates/modulates innate and adaptive immune responses / host cell plasma membrane / virion membrane / positive regulation of DNA-templated transcription / extracellular space / extracellular region / membrane
Similarity search - Function
Fibrillar collagen, C-terminal / Fibrillar collagen C-terminal domain / Fibrillar collagen C-terminal non-collagenous (NC1) domain profile. / Fibrillar collagens C-terminal domain / von Willebrand factor type C domain / VWFC domain signature. / VWFC domain profile. / von Willebrand factor (vWF) type C domain / VWFC domain / Collagen triple helix repeat ...Fibrillar collagen, C-terminal / Fibrillar collagen C-terminal domain / Fibrillar collagen C-terminal non-collagenous (NC1) domain profile. / Fibrillar collagens C-terminal domain / von Willebrand factor type C domain / VWFC domain signature. / VWFC domain profile. / von Willebrand factor (vWF) type C domain / VWFC domain / Collagen triple helix repeat / Collagen triple helix repeat (20 copies) / Spike (S) protein S1 subunit, receptor-binding domain, SARS-CoV-2 / 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
Collagen alpha-1(I) chain / Spike glycoprotein
Similarity search - Component
Biological speciesSevere acute respiratory syndrome coronavirus 2 / Homo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.2 Å
AuthorsZheng S / Ma J
Funding support China, 1 items
OrganizationGrant numberCountry
Ministry of Science and Technology (MoST, China) China
CitationJournal: J Virol / Year: 2021
Title: Cryo-EM structure of S-Trimer, a subunit vaccine candidate for COVID-19.
Authors: Jiahao Ma / Danmei Su / Yinyan Sun / Xueqin Huang / Ying Liang / Linqiang Fang / Yan Ma / Wenhui Li / Peng Liang / Sanduo Zheng /
Abstract: Within a year after its emergence, the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has infected over 100 million people worldwide with a death toll over 2 million. Vaccination ...Within a year after its emergence, the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has infected over 100 million people worldwide with a death toll over 2 million. Vaccination remains the best hope to ultimately put this pandemic to an end. Here, using Trimer-Tag technology, we produced both wild-type (WT) and furin site mutant (MT) S-Trimers for COVID-19 vaccine studies. Cryo-EM structures of the WT and MT S-Trimers, determined at 3.2 Å and 2.6 Å respectively, revealed that both antigens adopt a tightly closed conformation and their structures are essentially identical to that of the previously solved full-length WT S protein in detergent. The tightly closed conformation is stabilized by fatty acid and polysorbate 80 binding at the receptor binding domains (RBDs) and the N terminal domains (NTDs) respectively. Additionally, we identified an important pH switch in the WT S-Trimer that shows dramatic conformational change and accounts for its increased stability at lower pH. These results validate Trimer-Tag as a platform technology in production of metastable WT S-Trimer as a candidate for COVID-19 subunit vaccine.Effective vaccine against SARS-CoV-2 is critical to end the COVID-19 pandemic. Here, using Trimer-Tag technology, we are able to produce stable and large quantities of WT S-Trimer, a subunit vaccine candidate for COVID-19 with high safety and efficacy from animal and Phase 1 clinical trial studies. Cryo-EM structures of the S-Trimer subunit vaccine candidate show that it predominately adopts tightly closed pre-fusion state, and resembles that of the native and full-length spike in detergent, confirming its structural integrity. WT S-Trimer is currently being evaluated in global Phase 2/3 clinical trial. Combining with published structures of the S protein, we also propose a model to dissect the conformation change of the spike protein before receptor binding.
History
DepositionFeb 25, 2021-
Header (metadata) releaseMar 24, 2021-
Map releaseMar 24, 2021-
UpdateDec 7, 2022-
Current statusDec 7, 2022Processing site: PDBj / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.013
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.013
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7e7d
  • Surface level: 0.013
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_30999.png

Downloads & links

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Map

FileDownload / File: emd_30999.map.gz / Format: CCP4 / Size: 83.7 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Voxel sizeX=Y=Z: 1.087 Å
Density
Contour LevelBy AUTHOR: 0.013 / Movie #1: 0.013
Minimum - Maximum-0.05412025 - 0.10967209
Average (Standard dev.)0.0002482199 (±0.0027508999)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions280280280
Spacing280280280
CellA=B=C: 304.36002 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.0871.0871.087
M x/y/z280280280
origin x/y/z0.0000.0000.000
length x/y/z304.360304.360304.360
α/β/γ90.00090.00090.000
start NX/NY/NZ1219875
NX/NY/NZ141223232
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS280280280
D min/max/mean-0.0540.1100.000

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Supplemental data

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Sample components

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Entire : SARS-CoV-2 spike protein fused to the C-terminal region of human ...

EntireName: SARS-CoV-2 spike protein fused to the C-terminal region of human type 1a collagen
Components
  • Complex: SARS-CoV-2 spike protein fused to the C-terminal region of human type 1a collagen
    • Protein or peptide: Spike glycoprotein,Collagen alpha-1(I) chain
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: 9-OCTADECENOIC ACID

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Supramolecule #1: SARS-CoV-2 spike protein fused to the C-terminal region of human ...

SupramoleculeName: SARS-CoV-2 spike protein fused to the C-terminal region of human type 1a collagen
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2

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Macromolecule #1: Spike glycoprotein,Collagen alpha-1(I) chain

MacromoleculeName: Spike glycoprotein,Collagen alpha-1(I) chain / type: protein_or_peptide / ID: 1 / Details: Chimeric protein / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 168.164328 KDa
Recombinant expressionOrganism: Cricetulus griseus (Chinese hamster)
SequenceString: MFVFLVLLPL VSSQCVNLTT RTQLPPAYTN SFTRGVYYPD KVFRSSVLHS TQDLFLPFFS NVTWFHAIHV SGTNGTKRFD NPVLPFNDG VYFASTEKSN IIRGWIFGTT LDSKTQSLLI VNNATNVVIK VCEFQFCNDP FLGVYYHKNN KSWMESEFRV Y SSANNCTF ...String:
MFVFLVLLPL VSSQCVNLTT RTQLPPAYTN SFTRGVYYPD KVFRSSVLHS TQDLFLPFFS NVTWFHAIHV SGTNGTKRFD NPVLPFNDG VYFASTEKSN IIRGWIFGTT LDSKTQSLLI VNNATNVVIK VCEFQFCNDP FLGVYYHKNN KSWMESEFRV Y SSANNCTF EYVSQPFLMD LEGKQGNFKN LREFVFKNID GYFKIYSKHT PINLVRDLPQ GFSALEPLVD LPIGINITRF QT LLALHRS YLTPGDSSSG WTAGAAAYYV GYLQPRTFLL KYNENGTITD AVDCALDPLS ETKCTLKSFT VEKGIYQTSN FRV QPTESI VRFPNITNLC PFGEVFNATR FASVYAWNRK RISNCVADYS VLYNSASFST FKCYGVSPTK LNDLCFTNVY ADSF VIRGD EVRQIAPGQT GKIADYNYKL PDDFTGCVIA WNSNNLDSKV GGNYNYLYRL FRKSNLKPFE RDISTEIYQA GSTPC NGVE GFNCYFPLQS YGFQPTNGVG YQPYRVVVLS FELLHAPATV CGPKKSTNLV KNKCVNFNFN GLTGTGVLTE SNKKFL PFQ QFGRDIADTT DAVRDPQTLE ILDITPCSFG GVSVITPGTN TSNQVAVLYQ DVNCTEVPVA IHADQLTPTW RVYSTGS NV FQTRAGCLIG AEHVNNSYEC DIPIGAGICA SYQTQTNSPR RARSVASQSI IAYTMSLGAE NSVAYSNNSI AIPTNFTI S VTTEILPVSM TKTSVDCTMY ICGDSTECSN LLLQYGSFCT QLNRALTGIA VEQDKNTQEV FAQVKQIYKT PPIKDFGGF NFSQILPDPS KPSKRSFIED LLFNKVTLAD AGFIKQYGDC LGDIAARDLI CAQKFNGLTV LPPLLTDEMI AQYTSALLAG TITSGWTFG AGAALQIPFA MQMAYRFNGI GVTQNVLYEN QKLIANQFNS AIGKIQDSLS STASALGKLQ DVVNQNAQAL N TLVKQLSS NFGAISSVLN DILSRLDKVE AEVQIDRLIT GRLQSLQTYV TQQLIRAAEI RASANLAATK MSECVLGQSK RV DFCGKGY HLMSFPQSAP HGVVFLHVTY VPAQEKNFTT APAICHDGKA HFPREGVFVS NGTHWFVTQR NFYEPQIITT DNT FVSGNC DVVIGIVNNT VYDPLQPELD SFKEELDKYF KNHTSPDVDL GDISGINASV VNIQKEIDRL NEVAKNLNES LIDL QELGK YEQYIKRSNG LPGPIGPPGP RGRTGDAGPV GPPGPPGPPG PPGPPSAGFD FSFLPQPPQE KAHDGGRYYR ANDAN VVRD RDLEVDTTLK SLSQQIENIR SPEGSRKNPA RTCRDLKMCH SDWKSGEYWI DPNQGCNLDA IKVFCNMETG ETCVYP TQP SVAQKNWYIS KNPKDKRHVW FGESMTDGFQ FEYGGQGSDP ADVAIQLTFL RLMSTEASQN ITYHCKNSVA YMDQQTG NL KKALLLKGSN EIEIRAEGNS RFTYSVTVDG CTSHTGAWGK TVIEYKTTKS SRLPIIDVAP LDVGAPDQEF GFDVGPVC

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Macromolecule #3: 2-acetamido-2-deoxy-beta-D-glucopyranose

MacromoleculeName: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 3 / Number of copies: 19 / Formula: NAG
Molecular weightTheoretical: 221.208 Da
Chemical component information

ChemComp-NAG:
2-acetamido-2-deoxy-beta-D-glucopyranose / N-Acetylglucosamine

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Macromolecule #4: 9-OCTADECENOIC ACID

MacromoleculeName: 9-OCTADECENOIC ACID / type: ligand / ID: 4 / Number of copies: 3 / Formula: ELA
Molecular weightTheoretical: 282.461 Da
Chemical component information

ChemComp-ELA:
9-OCTADECENOIC ACID / Elaidic acid

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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

Concentration0.3 mg/mL
BufferpH: 7.4
GridModel: Quantifoil R1.2/1.3 / Support film - #0 - Film type ID: 1 / Support film - #0 - Material: CARBON / Support film - #0 - topology: HOLEY / Support film - #1 - Film type ID: 2 / Support film - #1 - Material: GRAPHENE OXIDE / Support film - #1 - topology: CONTINUOUS
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 282 K / Instrument: FEI VITROBOT MARK I
Details: blot time 2 seconds, blot force 4, waiting time 8 seconds.
Detailsmonodisperse

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Electron microscopy

MicroscopeTFS KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsCalibrated defocus max: 2.8000000000000003 µm / Calibrated defocus min: 0.6 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Cs: 0.0 mm / Nominal magnification: 64000
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Number grids imaged: 2 / Number real images: 2000 / Average electron dose: 50.0 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 1504770
Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

6vxx

Initial angle assignmentType: ANGULAR RECONSTITUTION
Final angle assignmentType: ANGULAR RECONSTITUTION
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.0.7) / Software - details: reconstruction / Number images used: 173288
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial modelPDB ID:

6vxx

RefinementSpace: REAL
Output model

PDB-7e7d:
Cryo-EM structure of the SARS-CoV-2 wild-type S-Trimer from a subunit vaccine candidate

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