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Yorodumi- PDB-9kmt: Bat SARSr-CoV RaTG15 Nsp1 bound to the Human 40S Ribosomal subuni... -
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Open data
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Basic information
| Entry | Database: PDB / ID: 9kmt | ||||||||||||||||||||||||
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| Title | Bat SARSr-CoV RaTG15 Nsp1 bound to the Human 40S Ribosomal subunit-State1 | ||||||||||||||||||||||||
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Keywords | RIBOSOME / 40S / Nsp1 / betacoronaviruses / cryo-EM | ||||||||||||||||||||||||
| Function / homology | Function and homology informationnegative regulation of endoplasmic reticulum unfolded protein response / oxidized pyrimidine DNA binding / response to TNF agonist / positive regulation of base-excision repair / positive regulation of intrinsic apoptotic signaling pathway in response to DNA damage / positive regulation of respiratory burst involved in inflammatory response / positive regulation of gastrulation / protein tyrosine kinase inhibitor activity / IRE1-RACK1-PP2A complex / positive regulation of Golgi to plasma membrane protein transport ...negative regulation of endoplasmic reticulum unfolded protein response / oxidized pyrimidine DNA binding / response to TNF agonist / positive regulation of base-excision repair / positive regulation of intrinsic apoptotic signaling pathway in response to DNA damage / positive regulation of respiratory burst involved in inflammatory response / positive regulation of gastrulation / protein tyrosine kinase inhibitor activity / IRE1-RACK1-PP2A complex / positive regulation of Golgi to plasma membrane protein transport / nucleolus organization / TNFR1-mediated ceramide production / positive regulation of ubiquitin-protein transferase activity / positive regulation of DNA-templated transcription initiation / negative regulation of RNA splicing / negative regulation of DNA repair / erythrocyte homeostasis / supercoiled DNA binding / regulation of establishment of cell polarity / cysteine-type endopeptidase activator activity involved in apoptotic process / oxidized purine DNA binding / NF-kappaB complex / cytoplasmic translational initiation / rRNA modification in the nucleus and cytosol / negative regulation of intrinsic apoptotic signaling pathway in response to hydrogen peroxide / negative regulation of phagocytosis / negative regulation of bicellular tight junction assembly / ubiquitin-like protein conjugating enzyme binding / cytoplasmic side of rough endoplasmic reticulum membrane / Formation of the ternary complex, and subsequently, the 43S complex / laminin receptor activity / negative regulation of myoblast fusion / ion channel inhibitor activity / protein kinase A binding / positive regulation of mitochondrial depolarization / Ribosomal scanning and start codon recognition / PELO:HBS1L and ABCE1 dissociate a ribosome on a non-stop mRNA / Translation initiation complex formation / negative regulation of Wnt signaling pathway / fibroblast growth factor binding / ZNF598 and the Ribosome-associated Quality Trigger (RQT) complex dissociate a ribosome stalled on a no-go mRNA / Protein hydroxylation / TOR signaling / BH3 domain binding / negative regulation of translational frameshifting / iron-sulfur cluster binding / regulation of adenylate cyclase-activating G protein-coupled receptor signaling pathway / monocyte chemotaxis / mTORC1-mediated signalling / SARS-CoV-1 modulates host translation machinery / regulation of cell division / positive regulation of GTPase activity / Peptide chain elongation / cellular response to ethanol / Selenocysteine synthesis / Dengue Virus Attachment and Entry / Formation of a pool of free 40S subunits / negative regulation of protein binding / positive regulation of intrinsic apoptotic signaling pathway by p53 class mediator / Eukaryotic Translation Termination / negative regulation of respiratory burst involved in inflammatory response / protein serine/threonine kinase inhibitor activity / SRP-dependent cotranslational protein targeting to membrane / Response of EIF2AK4 (GCN2) to amino acid deficiency / negative regulation of ubiquitin-dependent protein catabolic process / ubiquitin ligase inhibitor activity / Viral mRNA Translation / endonucleolytic cleavage to generate mature 3'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / positive regulation of signal transduction by p53 class mediator / GTP hydrolysis and joining of the 60S ribosomal subunit / L13a-mediated translational silencing of Ceruloplasmin expression / Major pathway of rRNA processing in the nucleolus and cytosol / regulation of translational fidelity / positive regulation of microtubule polymerization / phagocytic cup / spindle assembly / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / gastrulation / positive regulation of intrinsic apoptotic signaling pathway / Protein methylation / endonucleolytic cleavage in ITS1 to separate SSU-rRNA from 5.8S rRNA and LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / translation regulator activity / Nuclear events stimulated by ALK signaling in cancer / rough endoplasmic reticulum / Ribosome Quality Control (RQC) complex extracts and degrades nascent peptide / ribosomal small subunit export from nucleus / Amplification of signal from unattached kinetochores via a MAD2 inhibitory signal / laminin binding / DNA-(apurinic or apyrimidinic site) endonuclease activity / negative regulation of protein ubiquitination / positive regulation of cell cycle / rescue of stalled cytosolic ribosome / signaling adaptor activity / Maturation of protein E / MDM2/MDM4 family protein binding / Maturation of protein E / liver regeneration / ER Quality Control Compartment (ERQC) / Mitotic Prometaphase Similarity search - Function | ||||||||||||||||||||||||
| Biological species | Homo sapiens (human) SARS bat coronavirus | ||||||||||||||||||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.81 Å | ||||||||||||||||||||||||
Authors | Yuan, S. / Yan, R. / Wu, M. | ||||||||||||||||||||||||
| Funding support | China, 1items
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Citation | Journal: Nucleic Acids Res / Year: 2026Title: Strategic variations in sarbecovirus and merbecovirus Nsp1 linker regions for translation inhibition. Authors: Ruixi Yan / Mingbo Wu / Xiangyu Ge / Qianqian Jin / Moyu Wang / Haolong Zhou / Yan Li / Yue Wang / Shuai Yuan / ![]() Abstract: Nonstructural protein 1 (Nsp1) is a key virulence factor of coronaviruses, and its stable binding to the 40S ribosomal mRNA entry channel facilitates multiple functions, including suppression of host ...Nonstructural protein 1 (Nsp1) is a key virulence factor of coronaviruses, and its stable binding to the 40S ribosomal mRNA entry channel facilitates multiple functions, including suppression of host immune responses and degradation of host mRNA. To understand the structural basis of the conserved protein across viral lineages, we determined the cryo-EM structures of Nsp1-40S complexes of four coronaviruses from wild animals. Our results show that all Nsp1 proteins engage the mRNA entry channel via their C-terminal domain (CTD), but do not fully restrict the rotational mobility of the 40S head, which retains ∼5° of movement and repositions the Nsp1 linker region. Comparative analysis revealed distinct patterns in the linker regions connecting the N- and CTDs. Sarbecovirus Nsp1 contains a longer linker, whereas the merbecovirus Nsp1 adopts a shorter linker that navigates structural constraints more readily. Functionally, we find that linker length correlates with translation inhibition efficiency, suggesting a structural tuning mechanism. Additionally, variations in linker and helix 1 of the CTD among different lineages may serve as molecular markers for viral classification. Together, our results provide a comparative structural framework for understanding how coronavirus Nsp1 proteins modulate host translation and reflect evolutionary adaptations in ribosome engagement. | ||||||||||||||||||||||||
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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 | 9kmt.cif.gz | 1.8 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb9kmt.ent.gz | 1.4 MB | Display | PDB format |
| PDBx/mmJSON format | 9kmt.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/km/9kmt ftp://data.pdbj.org/pub/pdb/validation_reports/km/9kmt | HTTPS FTP |
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-Related structure data
| Related structure data | ![]() 62444MC ![]() 9kmuC ![]() 9kmvC ![]() 9kmwC ![]() 9kmxC ![]() 9kmyC ![]() 9kmzC ![]() 9kn0C 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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Links
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Assembly
| Deposited unit | ![]()
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Components
+Small ribosomal subunit protein ... , 34 types, 34 molecules ABCDEFGHIJKLMNOPQRSTUVWXYZabcd...
-RNA chain / Protein , 2 types, 2 molecules 2n
| #1: RNA chain | Mass: 602777.875 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human) / References: GenBank: 2845463023 |
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| #36: Protein | Mass: 19477.045 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Details: The sequence of organism SARS bat coronavirus is not available during the biocuration, replaced by A0A8F0ZWG1 temporarily. Source: (gene. exp.) SARS bat coronavirus / Gene: ORF1ab / Production host: ![]() |
-Details
| Has protein modification | N |
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-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
| Component | Name: The complex of Bat SARSr-CoV RaTG15 Nsp1 and Human 40S Ribosomal subunit Type: RIBOSOME / Entity ID: all / Source: RECOMBINANT | ||||||||||||
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| Source (natural) |
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| Source (recombinant) |
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| Buffer solution | pH: 8 | ||||||||||||
| Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||
| Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
| Microscopy | Model: JEOL CRYO ARM 300 |
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| Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
| Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 1000 nm |
| Image recording | Electron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) |
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Processing
| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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| 3D reconstruction | Resolution: 2.81 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 80699 / Symmetry type: POINT |
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About Yorodumi



Homo sapiens (human)
SARS bat coronavirus
China, 1items
Citation














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FIELD EMISSION GUN