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Yorodumi- PDB-7eiz: Coupling of N7-methyltransferase and 3'-5' exoribonuclease with S... -
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Open data
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Basic information
| Entry | Database: PDB / ID: 7eiz | |||||||||||||||||||||||||||||||||
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| Title | Coupling of N7-methyltransferase and 3'-5' exoribonuclease with SARS-CoV-2 polymerase reveals mechanisms for capping and proofreading | |||||||||||||||||||||||||||||||||
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Keywords | VIRAL PROTEIN/RNA / VIRAL PROTEIN-RNA COMPLEX | |||||||||||||||||||||||||||||||||
| Function / homology | Function and homology informationviral genome replication / methyltransferase activity / protein guanylyltransferase activity / RNA endonuclease activity producing 3'-phosphomonoesters, hydrolytic mechanism / mRNA guanylyltransferase activity / 5'-3' RNA helicase activity / Lyases; Phosphorus-oxygen lyases / Assembly of the SARS-CoV-2 Replication-Transcription Complex (RTC) / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of TBK1 activity / Maturation of replicase proteins ...viral genome replication / methyltransferase activity / protein guanylyltransferase activity / RNA endonuclease activity producing 3'-phosphomonoesters, hydrolytic mechanism / mRNA guanylyltransferase activity / 5'-3' RNA helicase activity / Lyases; Phosphorus-oxygen lyases / Assembly of the SARS-CoV-2 Replication-Transcription Complex (RTC) / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of TBK1 activity / Maturation of replicase proteins / TRAF3-dependent IRF activation pathway / ISG15-specific peptidase activity / Transcription of SARS-CoV-2 sgRNAs / Translation of Replicase and Assembly of the Replication Transcription Complex / snRNP Assembly / Replication of the SARS-CoV-2 genome / Hydrolases; Acting on ester bonds; Exoribonucleases producing 5'-phosphomonoesters / host cell endoplasmic reticulum-Golgi intermediate compartment / double membrane vesicle viral factory outer membrane / SARS coronavirus main proteinase / 5'-3' DNA helicase activity / 3'-5'-RNA exonuclease activity / endonuclease activity / host cell endosome / symbiont-mediated degradation of host mRNA / mRNA guanylyltransferase / symbiont-mediated suppression of host ISG15-protein conjugation / G-quadruplex RNA binding / symbiont-mediated suppression of host toll-like receptor signaling pathway / methylation / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of IRF3 activity / omega peptidase activity / SARS-CoV-2 modulates host translation machinery / mRNA (guanine-N7)-methyltransferase / methyltransferase cap1 / host cell Golgi apparatus / symbiont-mediated suppression of host NF-kappaB cascade / symbiont-mediated perturbation of host ubiquitin-like protein modification / DNA helicase / methyltransferase cap1 activity / ubiquitinyl hydrolase 1 / cysteine-type deubiquitinase activity / mRNA 5'-cap (guanine-N7-)-methyltransferase activity / Hydrolases; Acting on peptide bonds (peptidases); Cysteine endopeptidases / single-stranded RNA binding / regulation of autophagy / host cell perinuclear region of cytoplasm / viral protein processing / lyase activity / host cell endoplasmic reticulum membrane / RNA helicase / symbiont-mediated suppression of host type I interferon-mediated signaling pathway / symbiont-mediated suppression of host gene expression / copper ion binding / viral translational frameshifting / symbiont-mediated activation of host autophagy / RNA-directed RNA polymerase / cysteine-type endopeptidase activity / viral RNA genome replication / RNA-directed RNA polymerase activity / DNA-templated transcription / lipid binding / host cell nucleus / SARS-CoV-2 activates/modulates innate and adaptive immune responses / ATP hydrolysis activity / proteolysis / RNA binding / zinc ion binding / ATP binding / membrane Similarity search - Function | |||||||||||||||||||||||||||||||||
| Biological species | ![]() | |||||||||||||||||||||||||||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.78 Å | |||||||||||||||||||||||||||||||||
Authors | Yan, L. / Yang, Y.X. / Li, M.Y. / Zhang, Y. / Zheng, L.T. / Ge, J. / Huang, Y.C. / Liu, Z.Y. / Wang, T. / Gao, S. ...Yan, L. / Yang, Y.X. / Li, M.Y. / Zhang, Y. / Zheng, L.T. / Ge, J. / Huang, Y.C. / Liu, Z.Y. / Wang, T. / Gao, S. / Zhang, R. / Huang, Y.Y. / Guddat, L.W. / Gao, Y. / Rao, Z.H. / Lou, Z.Y. | |||||||||||||||||||||||||||||||||
| Funding support | China, 2items
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Citation | Journal: Cell / Year: 2021Title: Coupling of N7-methyltransferase and 3'-5' exoribonuclease with SARS-CoV-2 polymerase reveals mechanisms for capping and proofreading. Authors: Liming Yan / Yunxiang Yang / Mingyu Li / Ying Zhang / Litao Zheng / Ji Ge / Yucen C Huang / Zhenyu Liu / Tao Wang / Shan Gao / Ran Zhang / Yuanyun Y Huang / Luke W Guddat / Yan Gao / Zihe Rao / Zhiyong Lou / ![]() Abstract: The capping of mRNA and the proofreading play essential roles in SARS-CoV-2 replication and transcription. Here, we present the cryo-EM structure of the SARS-CoV-2 replication-transcription complex ...The capping of mRNA and the proofreading play essential roles in SARS-CoV-2 replication and transcription. Here, we present the cryo-EM structure of the SARS-CoV-2 replication-transcription complex (RTC) in a form identified as Cap(0)-RTC, which couples a co-transcriptional capping complex (CCC) composed of nsp12 NiRAN, nsp9, the bifunctional nsp14 possessing an N-terminal exoribonuclease (ExoN) and a C-terminal N7-methyltransferase (N7-MTase), and nsp10 as a cofactor of nsp14. Nsp9 and nsp12 NiRAN recruit nsp10/nsp14 into the Cap(0)-RTC, forming the N7-CCC to yield cap(0) (GpppA) at 5' end of pre-mRNA. A dimeric form of Cap(0)-RTC observed by cryo-EM suggests an in trans backtracking mechanism for nsp14 ExoN to facilitate proofreading of the RNA in concert with polymerase nsp12. These results not only provide a structural basis for understanding co-transcriptional modification of SARS-CoV-2 mRNA but also shed light on how replication fidelity in SARS-CoV-2 is maintained. | |||||||||||||||||||||||||||||||||
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Structure visualization
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| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 7eiz.cif.gz | 652.1 KB | Display | PDBx/mmCIF format |
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| PDB format | pdb7eiz.ent.gz | Display | PDB format | |
| PDBx/mmJSON format | 7eiz.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 7eiz_validation.pdf.gz | 919.3 KB | Display | wwPDB validaton report |
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| Full document | 7eiz_full_validation.pdf.gz | 1.1 MB | Display | |
| Data in XML | 7eiz_validation.xml.gz | 106.5 KB | Display | |
| Data in CIF | 7eiz_validation.cif.gz | 168.3 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/ei/7eiz ftp://data.pdbj.org/pub/pdb/validation_reports/ei/7eiz | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 31146MC ![]() 7egqC M: map data used to model this data C: citing same article ( |
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| Similar structure data |
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Links
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Assembly
| Deposited unit | ![]()
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Components
-Protein , 3 types, 4 molecules AKEF
| #1: Protein | Mass: 106440.562 Da / Num. of mol.: 1 / Fragment: UNP residues 4393-5324 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Gene: rep, 1a-1b / Production host: ![]() |
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| #8: Protein | Mass: 59887.480 Da / Num. of mol.: 1 / Fragment: UNP residues 5926-6452 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Production host: ![]() References: UniProt: P0DTD1, Hydrolases; Acting on ester bonds; Exoribonucleases producing 5'-phosphomonoesters |
| #9: Protein | Mass: 66930.531 Da / Num. of mol.: 2 / Fragment: UNP residues 5325-5925 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Production host: ![]() |
-Non-structural protein ... , 4 types, 5 molecules BDCGH
| #2: Protein | Mass: 21903.047 Da / Num. of mol.: 2 / Fragment: UNP residues 3943-4140 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Gene: rep, 1a-1b / Production host: ![]() #3: Protein | | Mass: 9248.804 Da / Num. of mol.: 1 / Fragment: UNP residues 3860-3942 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Production host: ![]() #4: Protein | | Mass: 12391.171 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Production host: ![]() #5: Protein | | Mass: 14802.930 Da / Num. of mol.: 1 / Fragment: UNP residues 4254-4392 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Production host: ![]() |
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-RNA chain , 2 types, 2 molecules IJ
| #6: RNA chain | Mass: 8172.932 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Production host: ![]() |
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| #7: RNA chain | Mass: 8522.079 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Production host: ![]() |
-Non-polymers , 2 types, 14 molecules 


| #10: Chemical | ChemComp-ZN / #11: Chemical | ChemComp-MG / | |
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-Details
| Has ligand of interest | Y |
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| Has protein modification | Y |
-Experimental details
-Experiment
| Experiment | Method: ELECTRON MICROSCOPY |
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| EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
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| Buffer solution | pH: 7 | ||||||||||||||||||||||||
| Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||||||
| Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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| Microscopy | Model: FEI TITAN KRIOS |
| Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
| Electron lens | Mode: BRIGHT FIELD |
| Image recording | Electron dose: 60 e/Å2 / Film or detector model: GATAN K2 QUANTUM (4k x 4k) |
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Processing
| Software | Name: PHENIX / Version: 1.18rc3_3805: / Classification: refinement | ||||||||||||||||||||||||
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| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
| 3D reconstruction | Resolution: 3.78 Å / Num. of particles: 80256 / Symmetry type: POINT | ||||||||||||||||||||||||
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China, 2items
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