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- EMDB-30998: Cryo-EM structure of the SARS-CoV-2 furin site mutant S-Trimer fr... -
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Basic information
Entry | Database: EMDB / ID: EMD-30998 | |||||||||
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Title | Cryo-EM structure of the SARS-CoV-2 furin site mutant S-Trimer from a subunit vaccine candidate | |||||||||
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![]() | spike protein / COVID-19 / vaccine / VIRAL PROTEIN | |||||||||
Function / homology | ![]() collagen type I trimer / cellular response to vitamin E / tooth mineralization / cellular response to fluoride / Anchoring fibril formation / Crosslinking of collagen fibrils / collagen biosynthetic process / Collagen chain trimerization / Defective VWF binding to collagen type I / platelet-derived growth factor binding ...collagen type I trimer / cellular response to vitamin E / tooth mineralization / cellular response to fluoride / Anchoring fibril formation / Crosslinking of collagen fibrils / collagen biosynthetic process / Collagen chain trimerization / Defective VWF binding to collagen type I / platelet-derived growth factor binding / Enhanced cleavage of VWF variant by ADAMTS13 / Defective VWF cleavage by ADAMTS13 variant / bone trabecula formation / extracellular matrix structural constituent conferring tensile strength / Enhanced binding of GP1BA variant to VWF multimer:collagen / Defective binding of VWF variant to GPIb:IX:V / intramembranous ossification / Extracellular matrix organization / embryonic skeletal system development / cartilage development involved in endochondral bone morphogenesis / Collagen biosynthesis and modifying enzymes / skin morphogenesis / collagen-activated tyrosine kinase receptor signaling pathway / endochondral ossification / Platelet Adhesion to exposed collagen / collagen fibril organization / response to steroid hormone / face morphogenesis / Assembly of collagen fibrils and other multimeric structures / Scavenging by Class A Receptors / MET activates PTK2 signaling / GP1b-IX-V activation signalling / Syndecan interactions / skin development / blood vessel development / RUNX2 regulates osteoblast differentiation / Platelet Aggregation (Plug Formation) / Collagen degradation / Non-integrin membrane-ECM interactions / protein localization to nucleus / cellular response to fibroblast growth factor stimulus / ECM proteoglycans / negative regulation of cell-substrate adhesion / response to hyperoxia / Integrin cell surface interactions / positive regulation of epithelial to mesenchymal transition / response to mechanical stimulus / response to cAMP / cellular response to transforming growth factor beta stimulus / cellular response to retinoic acid / GPVI-mediated activation cascade / cellular response to epidermal growth factor stimulus / extracellular matrix organization / ossification / visual perception / secretory granule / skeletal system development / Cell surface interactions at the vascular wall / response to insulin / cellular response to amino acid stimulus / cellular response to glucose stimulus / sensory perception of sound / response to hydrogen peroxide / cellular response to mechanical stimulus / osteoblast differentiation / Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell / positive regulation of canonical Wnt signaling pathway / protein transport / cellular response to tumor necrosis factor / response to estradiol / protease binding / collagen-containing extracellular matrix / Maturation of spike protein / viral translation / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / symbiont-mediated-mediated suppression 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 / membrane fusion / Attachment and Entry / positive regulation of viral entry into host cell / receptor-mediated virion attachment to host cell / host cell surface receptor binding / symbiont-mediated suppression of host innate immune response / positive regulation of cell migration / receptor ligand activity / endocytosis involved in viral entry into host cell / response to xenobiotic stimulus / endoplasmic reticulum lumen / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / virion attachment to host cell / positive regulation of DNA-templated transcription / SARS-CoV-2 activates/modulates innate and adaptive immune responses Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 2.6 Å | |||||||||
![]() | Zheng S / Ma J | |||||||||
Funding support | ![]()
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![]() | ![]() 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 |
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Structure visualization
Movie |
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 8.6 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 15.2 KB 15.2 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 9.9 KB | Display | ![]() |
Images | ![]() | 44.2 KB | ||
Filedesc metadata | ![]() | 7 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 435.1 KB | Display | ![]() |
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Full document | ![]() | 434.6 KB | Display | |
Data in XML | ![]() | 11.3 KB | Display | |
Data in CIF | ![]() | 15.2 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7e7bMC ![]() 7e7dC M: atomic model generated by this map C: citing same article ( |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
File | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.087 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
-Entire : SARS-CoV-2 spike protein fused to the C-terminal region of human ...
Entire | Name: SARS-CoV-2 spike protein fused to the C-terminal region of human type 1a collagen |
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Components |
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-Supramolecule #1: SARS-CoV-2 spike protein fused to the C-terminal region of human ...
Supramolecule | Name: 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 |
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Source (natural) | Organism: ![]() ![]() |
-Macromolecule #1: Spike glycoprotein,Collagen alpha-1(I) chain
Macromolecule | Name: Spike glycoprotein,Collagen alpha-1(I) chain / type: protein_or_peptide / ID: 1 / Details: Chimeric protein / Number of copies: 3 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 168.078203 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: 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 RAASVASQSI 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 UniProtKB: Spike glycoprotein, Collagen alpha-1(I) chain |
-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: 15 / Formula: NAG |
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Molecular weight | Theoretical: 221.208 Da |
Chemical component information | ![]() ChemComp-NAG: |
-Macromolecule #4: 9-OCTADECENOIC ACID
Macromolecule | Name: 9-OCTADECENOIC ACID / type: ligand / ID: 4 / Number of copies: 3 / Formula: ELA |
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Molecular weight | Theoretical: 282.461 Da |
Chemical component information | ![]() ChemComp-ELA: |
-Macromolecule #5: 2-hydroxyethyl 2-deoxy-3,5-bis-O-(2-hydroxyethyl)-6-O-(2-{[(9E)-o...
Macromolecule | Name: 2-hydroxyethyl 2-deoxy-3,5-bis-O-(2-hydroxyethyl)-6-O-(2-{[(9E)-octadec-9-enoyl]oxy}ethyl)-alpha-L-xylo-hexofuranoside type: ligand / ID: 5 / Number of copies: 3 / Formula: VCG |
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Molecular weight | Theoretical: 604.813 Da |
Chemical component information | ![]() ChemComp-VCG: |
-Macromolecule #6: water
Macromolecule | Name: water / type: ligand / ID: 6 / Number of copies: 36 / Formula: HOH |
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Molecular weight | Theoretical: 18.015 Da |
Chemical component information | ![]() ChemComp-HOH: |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Concentration | 0.3 mg/mL |
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Buffer | pH: 7.4 |
Grid | Model: Quantifoil R1.2/1.3 / Material: GOLD / Mesh: 400 / 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 / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 20 sec. / Pretreatment - Atmosphere: AIR |
Vitrification | Cryogen 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. |
Details | monodisperse |
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Electron microscopy
Microscope | TFS KRIOS |
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Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Number grids imaged: 2 / Number real images: 2000 / Average electron dose: 50.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Calibrated defocus max: 2.8000000000000003 µm / Calibrated defocus min: 0.6 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 0.0 mm / Nominal magnification: 64000 |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |