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Open data
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Basic information
| Entry | Database: PDB / ID: 7tj2 | ||||||||||||
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| Title | SARS-CoV-2 endoribonuclease Nsp15 bound to dsRNA | ||||||||||||
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Keywords | VIRAL PROTEIN/RNA / endoribonuclease / VIRAL PROTEIN / VIRAL PROTEIN-RNA complex | ||||||||||||
| Function / homology | Function and homology informationprotein 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 ...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 / snRNP Assembly / Translation of Replicase and Assembly of the Replication Transcription Complex / Replication of the SARS-CoV-2 genome / Hydrolases; Acting on ester bonds; Exoribonucleases producing 5'-phosphomonoesters / double membrane vesicle viral factory outer membrane / host cell endoplasmic reticulum-Golgi intermediate compartment / SARS coronavirus main proteinase / 5'-3' DNA helicase activity / 3'-5'-RNA exonuclease 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 / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of IRF3 activity / omega peptidase activity / mRNA (guanine-N7)-methyltransferase / methyltransferase cap1 / SARS-CoV-2 modulates host translation machinery / 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 / viral protein processing / host cell perinuclear region of cytoplasm / 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 | ![]() synthetic construct (others) | ||||||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.2 Å | ||||||||||||
Authors | Frazier, M.N. / Krahn, J.M. / Butay, K.J. / Dillard, L.B. / Borgnia, M.J. / Stanley, R.E. | ||||||||||||
| Funding support | United States, 3items
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Citation | Journal: Nucleic Acids Res / Year: 2022Title: Flipped over U: structural basis for dsRNA cleavage by the SARS-CoV-2 endoribonuclease. Authors: Meredith N Frazier / Isha M Wilson / Juno M Krahn / Kevin John Butay / Lucas B Dillard / Mario J Borgnia / Robin E Stanley Abstract: Coronaviruses generate double-stranded (ds) RNA intermediates during viral replication that can activate host immune sensors. To evade activation of the host pattern recognition receptor MDA5, ...Coronaviruses generate double-stranded (ds) RNA intermediates during viral replication that can activate host immune sensors. To evade activation of the host pattern recognition receptor MDA5, coronaviruses employ Nsp15, which is a uridine-specific endoribonuclease. Nsp15 is proposed to associate with the coronavirus replication-transcription complex within double-membrane vesicles to cleave these dsRNA intermediates. How Nsp15 recognizes and processes dsRNA is poorly understood because previous structural studies of Nsp15 have been limited to small single-stranded (ss) RNA substrates. Here we present cryo-EM structures of SARS-CoV-2 Nsp15 bound to a 52nt dsRNA. We observed that the Nsp15 hexamer forms a platform for engaging dsRNA across multiple protomers. The structures, along with site-directed mutagenesis and RNA cleavage assays revealed critical insight into dsRNA recognition and processing. To process dsRNA Nsp15 utilizes a base-flipping mechanism to properly orient the uridine within the active site for cleavage. Our findings show that Nsp15 is a distinctive endoribonuclease that can cleave both ss- and dsRNA effectively. #1: Journal: bioRxiv / Year: 2022 Title: Flipped Over U: Structural Basis for dsRNA Cleavage by the SARS-CoV-2 Endoribonuclease. Authors: Meredith N Frazier / Isha M Wilson / Juno M Krahn / Kevin John Butay / Lucas B Dillard / Mario J Borgnia / Robin E Stanley / ![]() Abstract: Coronaviruses generate double-stranded (ds) RNA intermediates during viral replication that can activate host immune sensors. To evade activation of the host pattern recognition receptor MDA5, ...Coronaviruses generate double-stranded (ds) RNA intermediates during viral replication that can activate host immune sensors. To evade activation of the host pattern recognition receptor MDA5, coronaviruses employ Nsp15, which is uridine-specific endoribonuclease. Nsp15 is proposed to associate with the coronavirus replication-transcription complex within double-membrane vesicles to cleave these dsRNA intermediates. How Nsp15 recognizes and processes dsRNA is poorly understood because previous structural studies of Nsp15 have been limited to small single-stranded (ss) RNA substrates. Here we present cryo-EM structures of SARS-CoV-2 Nsp15 bound to a 52nt dsRNA. We observed that the Nsp15 hexamer forms a platform for engaging dsRNA across multiple protomers. The structures, along with site-directed mutagenesis and RNA cleavage assays revealed critical insight into dsRNA recognition and processing. To process dsRNA Nsp15 utilizes a base-flipping mechanism to properly orient the uridine within the active site for cleavage. Our findings show that Nsp15 is a distinctive endoribonuclease that can cleave both ss- and dsRNA effectively. | ||||||||||||
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Structure visualization
| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 7tj2.cif.gz | 415.2 KB | Display | PDBx/mmCIF format |
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| PDB format | pdb7tj2.ent.gz | 333.9 KB | Display | PDB format |
| PDBx/mmJSON format | 7tj2.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 7tj2_validation.pdf.gz | 886.1 KB | Display | wwPDB validaton report |
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| Full document | 7tj2_full_validation.pdf.gz | 897.4 KB | Display | |
| Data in XML | 7tj2_validation.xml.gz | 53.6 KB | Display | |
| Data in CIF | 7tj2_validation.cif.gz | 82.2 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/tj/7tj2 ftp://data.pdbj.org/pub/pdb/validation_reports/tj/7tj2 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 25915MC ![]() 7tqvC M: map data used to model this data C: citing same article ( |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Assembly
| Deposited unit | ![]()
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| Noncrystallographic symmetry (NCS) | NCS domain:
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About Yorodumi






United States, 3items
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