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Yorodumi- EMDB-9704: Cryo-EM structure of the HCV IRES dependently initiated CMV-stall... -
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Basic information
| Entry | Database: EMDB / ID: EMD-9704 | |||||||||
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| Title | Cryo-EM structure of the HCV IRES dependently initiated CMV-stalled 80S ribosome, rotated (Structure v) | |||||||||
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| Function / homology | Function and homology informationtranslation termination factor activity / translation release factor complex / cytoplasmic translational termination / regulation of translational termination / translation release factor activity, codon specific / translation at presynapse / protein methylation / exit from mitosis / eukaryotic 80S initiation complex / negative regulation of protein neddylation ...translation termination factor activity / translation release factor complex / cytoplasmic translational termination / regulation of translational termination / translation release factor activity, codon specific / translation at presynapse / protein methylation / exit from mitosis / eukaryotic 80S initiation complex / negative regulation of protein neddylation / response to insecticide / translation release factor activity / optic nerve development / regulation of translation involved in cellular response to UV / negative regulation of endoplasmic reticulum unfolded protein response / oxidized pyrimidine DNA binding / response to TNF agonist / positive regulation of base-excision repair / axial mesoderm development / negative regulation of formation of translation preinitiation complex / positive regulation of respiratory burst involved in inflammatory response / regulation of G1 to G0 transition / ribosomal protein import into nucleus / positive regulation of intrinsic apoptotic signaling pathway in response to DNA damage / positive regulation of gastrulation / protein tyrosine kinase inhibitor activity / protein-DNA complex disassembly / positive regulation of endodeoxyribonuclease activity / IRE1-RACK1-PP2A complex / nucleolus organization / sequence-specific mRNA binding / positive regulation of Golgi to plasma membrane protein transport / positive regulation of intrinsic apoptotic signaling pathway in response to DNA damage by p53 class mediator / 90S preribosome assembly / retinal ganglion cell axon guidance / TNFR1-mediated ceramide production / negative regulation of DNA repair / negative regulation of RNA splicing / GAIT complex / peptidyl-tRNA hydrolase activity / positive regulation of DNA damage response, signal transduction by p53 class mediator / supercoiled DNA binding / TORC2 complex binding / neural crest cell differentiation / alpha-beta T cell differentiation / G1 to G0 transition / NF-kappaB complex / nuclear-transcribed mRNA catabolic process, nonsense-mediated decay / cysteine-type endopeptidase activator activity involved in apoptotic process / oxidized purine DNA binding / positive regulation of ubiquitin-protein transferase activity / negative regulation of intrinsic apoptotic signaling pathway in response to hydrogen peroxide / regulation of establishment of cell polarity / negative regulation of bicellular tight junction assembly / ubiquitin-like protein conjugating enzyme binding / middle ear morphogenesis / negative regulation of phagocytosis / rRNA modification in the nucleus and cytosol / Formation of the ternary complex, and subsequently, the 43S complex / erythrocyte homeostasis / cytoplasmic side of rough endoplasmic reticulum membrane / laminin receptor activity / negative regulation of ubiquitin protein ligase activity / protein kinase A binding / ion channel inhibitor activity / Ribosomal scanning and start codon recognition / homeostatic process / Translation initiation complex formation / pigmentation / positive regulation of mitochondrial depolarization / macrophage chemotaxis / positive regulation of T cell receptor signaling pathway / negative regulation of Wnt signaling pathway / fibroblast growth factor binding / lung morphogenesis / monocyte chemotaxis / male meiosis I / positive regulation of natural killer cell proliferation / positive regulation of activated T cell proliferation / negative regulation of translational frameshifting / TOR signaling / Protein hydroxylation / BH3 domain binding / SARS-CoV-1 modulates host translation machinery / regulation of adenylate cyclase-activating G protein-coupled receptor signaling pathway / iron-sulfur cluster binding / regulation of cell division / cellular response to ethanol / mTORC1-mediated signalling / Peptide chain elongation / Selenocysteine synthesis / Formation of a pool of free 40S subunits / positive regulation of intrinsic apoptotic signaling pathway by p53 class mediator / endonucleolytic cleavage to generate mature 3'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / Eukaryotic Translation Termination / ubiquitin ligase inhibitor activity / positive regulation of GTPase activity / cellular response to actinomycin D / Response of EIF2AK4 (GCN2) to amino acid deficiency / blastocyst development Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 4.6 Å | |||||||||
Authors | Yokoyama T / Shigematsu H / Shirouzu M / Imataka H / Ito T | |||||||||
Citation | Journal: Mol Cell / Year: 2019Title: HCV IRES Captures an Actively Translating 80S Ribosome. Authors: Takeshi Yokoyama / Kodai Machida / Wakana Iwasaki / Tomoaki Shigeta / Madoka Nishimoto / Mari Takahashi / Ayako Sakamoto / Mayumi Yonemochi / Yoshie Harada / Hideki Shigematsu / Mikako ...Authors: Takeshi Yokoyama / Kodai Machida / Wakana Iwasaki / Tomoaki Shigeta / Madoka Nishimoto / Mari Takahashi / Ayako Sakamoto / Mayumi Yonemochi / Yoshie Harada / Hideki Shigematsu / Mikako Shirouzu / Hisashi Tadakuma / Hiroaki Imataka / Takuhiro Ito / ![]() Abstract: Translation initiation of hepatitis C virus (HCV) genomic RNA is induced by an internal ribosome entry site (IRES). Our cryoelectron microscopy (cryo-EM) analysis revealed that the HCV IRES binds to ...Translation initiation of hepatitis C virus (HCV) genomic RNA is induced by an internal ribosome entry site (IRES). Our cryoelectron microscopy (cryo-EM) analysis revealed that the HCV IRES binds to the solvent side of the 40S platform of the cap-dependently translating 80S ribosome. Furthermore, we obtained the cryo-EM structures of the HCV IRES capturing the 40S subunit of the IRES-dependently translating 80S ribosome. In the elucidated structures, the HCV IRES "body," consisting of domain III except for subdomain IIIb, binds to the 40S subunit, while the "long arm," consisting of domain II, remains flexible and does not impede the ongoing translation. Biochemical experiments revealed that the cap-dependently translating ribosome becomes a better substrate for the HCV IRES than the free ribosome. Therefore, the HCV IRES is likely to efficiently induce the translation initiation of its downstream mRNA with the captured translating ribosome as soon as the ongoing translation terminates. | |||||||||
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Structure visualization
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| Structure viewer | EM map: SurfView Molmil Jmol/JSmol |
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Downloads & links
-EMDB archive
| Map data | emd_9704.map.gz | 264.9 MB | EMDB map data format | |
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| Header (meta data) | emd-9704-v30.xml emd-9704.xml | 21.3 KB 21.3 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_9704_fsc.xml | 14.8 KB | Display | FSC data file |
| Images | emd_9704.png | 158.2 KB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-9704 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-9704 | HTTPS FTP |
-Validation report
| Summary document | emd_9704_validation.pdf.gz | 78.3 KB | Display | EMDB validaton report |
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| Full document | emd_9704_full_validation.pdf.gz | 77.4 KB | Display | |
| Data in XML | emd_9704_validation.xml.gz | 493 B | Display | |
| Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-9704 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-9704 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 9699C ![]() 9701C ![]() 9702C ![]() 9703C ![]() 6ip5C ![]() 6ip6C ![]() 6ip8C C: citing same article ( |
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| Similar structure data |
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Links
| EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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| Related items in Molecule of the Month |
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Map
| File | Download / File: emd_9704.map.gz / Format: CCP4 / Size: 282.6 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 1.49 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 : Human 80S ribosome
| Entire | Name: Human 80S ribosome |
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| Components |
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-Supramolecule #1: Human 80S ribosome
| Supramolecule | Name: Human 80S ribosome / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#84 |
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| Source (natural) | Organism: Homo sapiens (human) |
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | particle |
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Sample preparation
| Buffer | pH: 7.5 |
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| Grid | Model: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 300 / Support film - Material: CARBON / Support film - topology: CONTINUOUS |
| Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
| Microscope | FEI TECNAI ARCTICA |
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| Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Average electron dose: 50.0 e/Å2 |
| Electron beam | Acceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | C2 aperture diameter: 50.0 µm / Calibrated magnification: 33557 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal magnification: 23500 |
| Sample stage | Cooling holder cryogen: NITROGEN |
| Experimental equipment | ![]() Model: Talos Arctica / Image courtesy: FEI Company |
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