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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 / translation release factor activity, codon specific / protein methylation / translation at presynapse / exit from mitosis / optic nerve development ...translation termination factor activity / translation release factor complex / cytoplasmic translational termination / regulation of translational termination / translation release factor activity / translation release factor activity, codon specific / protein methylation / translation at presynapse / exit from mitosis / optic nerve development / response to insecticide / sequence-specific mRNA binding / regulation of translation involved in cellular response to UV / eukaryotic 80S initiation complex / ribosomal protein import into nucleus / negative regulation of endoplasmic reticulum unfolded protein response / negative regulation of formation of translation preinitiation complex / regulation of G1 to G0 transition / axial mesoderm development / retinal ganglion cell axon guidance / oxidized pyrimidine DNA binding / response to TNF agonist / positive regulation of base-excision repair / peptidyl-tRNA hydrolase activity / positive regulation of intrinsic apoptotic signaling pathway in response to DNA damage by p53 class mediator / protein-DNA complex disassembly / positive regulation of respiratory burst involved in inflammatory response / positive regulation of gastrulation / nuclear-transcribed mRNA catabolic process, nonsense-mediated decay / 90S preribosome assembly / positive regulation of ubiquitin-protein transferase activity / protein tyrosine kinase inhibitor activity / positive regulation of intrinsic apoptotic signaling pathway in response to DNA damage / positive regulation of DNA-templated transcription initiation / IRE1-RACK1-PP2A complex / positive regulation of Golgi to plasma membrane protein transport / alpha-beta T cell differentiation / nucleolus organization / TNFR1-mediated ceramide production / positive regulation of DNA damage response, signal transduction by p53 class mediator / GAIT complex / negative regulation of RNA splicing / TORC2 complex binding / neural crest cell differentiation / supercoiled DNA binding / G1 to G0 transition / cytoplasmic translational initiation / NF-kappaB complex / negative regulation of DNA repair / oxidized purine DNA binding / middle ear morphogenesis / cysteine-type endopeptidase activator activity involved in apoptotic process / rRNA modification in the nucleus and cytosol / negative regulation of intrinsic apoptotic signaling pathway in response to hydrogen peroxide / negative regulation of bicellular tight junction assembly / ubiquitin-like protein conjugating enzyme binding / regulation of establishment of cell polarity / negative regulation of phagocytosis / erythrocyte homeostasis / cytoplasmic side of rough endoplasmic reticulum membrane / Formation of the ternary complex, and subsequently, the 43S complex / ion channel inhibitor activity / protein kinase A binding / laminin receptor activity / homeostatic process / pigmentation / Ribosomal scanning and start codon recognition / positive regulation of mitochondrial depolarization / macrophage chemotaxis / Translation initiation complex formation / lung morphogenesis / negative regulation of Wnt signaling pathway / positive regulation of natural killer cell proliferation / fibroblast growth factor binding / male meiosis I / Protein hydroxylation / BH3 domain binding / monocyte chemotaxis / negative regulation of translational frameshifting / regulation of adenylate cyclase-activating G protein-coupled receptor signaling pathway / TOR signaling / mTORC1-mediated signalling / SARS-CoV-1 modulates host translation machinery / positive regulation of GTPase activity / iron-sulfur cluster binding / regulation of cell division / cellular response to ethanol / Peptide chain elongation / Selenocysteine synthesis / Formation of a pool of free 40S subunits / negative regulation of protein binding / blastocyst development / protein serine/threonine kinase inhibitor activity / Eukaryotic Translation Termination / positive regulation of intrinsic apoptotic signaling pathway by p53 class mediator / SRP-dependent cotranslational protein targeting to membrane / Response of EIF2AK4 (GCN2) to amino acid deficiency / negative regulation of respiratory burst involved in inflammatory response / ubiquitin ligase inhibitor activity / Viral mRNA Translation 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 |
-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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