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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-3221 | |||||||||
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Title | Mammalian 80S HCV-IRES complex, Classical | |||||||||
![]() | Reconstruction of ribosome complex | |||||||||
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![]() | ribosome / translation initiation / Hepatitis C Virus internal ribosome entry site | |||||||||
Function / homology | ![]() 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 respiratory burst involved in inflammatory response / positive regulation of intrinsic apoptotic signaling pathway in response to DNA damage / positive regulation of gastrulation / protein tyrosine kinase inhibitor activity / IRE1-RACK1-PP2A complex / positive regulation of endodeoxyribonuclease activity ...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 respiratory burst involved in inflammatory response / positive regulation of intrinsic apoptotic signaling pathway in response to DNA damage / positive regulation of gastrulation / protein tyrosine kinase inhibitor activity / IRE1-RACK1-PP2A complex / positive regulation of endodeoxyribonuclease activity / nucleolus organization / positive regulation of Golgi to plasma membrane protein transport / TNFR1-mediated ceramide production / negative regulation of DNA repair / negative regulation of RNA splicing / positive regulation of intrinsic apoptotic signaling pathway by p53 class mediator / supercoiled DNA binding / neural crest cell differentiation / NF-kappaB complex / positive regulation of ubiquitin-protein transferase activity / cysteine-type endopeptidase activator activity involved in apoptotic process / oxidized purine DNA binding / negative regulation of intrinsic apoptotic signaling pathway in response to hydrogen peroxide / ubiquitin-like protein conjugating enzyme binding / negative regulation of bicellular tight junction assembly / regulation of establishment of cell polarity / 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 / pigmentation / Ribosomal scanning and start codon recognition / Translation initiation complex formation / positive regulation of mitochondrial depolarization / positive regulation of T cell receptor signaling pathway / fibroblast growth factor binding / negative regulation of Wnt signaling pathway / monocyte chemotaxis / positive regulation of activated T cell proliferation / negative regulation of translational frameshifting / Protein hydroxylation / TOR signaling / BH3 domain binding / regulation of cell division / SARS-CoV-1 modulates host translation machinery / mTORC1-mediated signalling / cellular response to ethanol / regulation of adenylate cyclase-activating G protein-coupled receptor signaling pathway / iron-sulfur cluster binding / Peptide chain elongation / Selenocysteine synthesis / Formation of a pool of free 40S subunits / 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 / Response of EIF2AK4 (GCN2) to amino acid deficiency / negative regulation of ubiquitin-dependent protein catabolic process / positive regulation of signal transduction by p53 class mediator / SRP-dependent cotranslational protein targeting to membrane / protein serine/threonine kinase inhibitor activity / Viral mRNA Translation / negative regulation of respiratory burst involved in inflammatory response / Maturation of protein E / Maturation of protein E / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / GTP hydrolysis and joining of the 60S ribosomal subunit / ER Quality Control Compartment (ERQC) / Myoclonic epilepsy of Lafora / FLT3 signaling by CBL mutants / Prevention of phagosomal-lysosomal fusion / L13a-mediated translational silencing of Ceruloplasmin expression / IRAK2 mediated activation of TAK1 complex / Alpha-protein kinase 1 signaling pathway / Glycogen synthesis / IRAK1 recruits IKK complex / IRAK1 recruits IKK complex upon TLR7/8 or 9 stimulation / Membrane binding and targetting of GAG proteins / Endosomal Sorting Complex Required For Transport (ESCRT) / Regulation of TBK1, IKKε (IKBKE)-mediated activation of IRF3, IRF7 / Negative regulation of FLT3 / PTK6 Regulates RTKs and Their Effectors AKT1 and DOK1 / Regulation of TBK1, IKKε-mediated activation of IRF3, IRF7 upon TLR3 ligation / Constitutive Signaling by NOTCH1 HD Domain Mutants / IRAK2 mediated activation of TAK1 complex upon TLR7/8 or 9 stimulation / NOTCH2 Activation and Transmission of Signal to the Nucleus / Major pathway of rRNA processing in the nucleolus and cytosol / TICAM1,TRAF6-dependent induction of TAK1 complex / phagocytic cup / TICAM1-dependent activation of IRF3/IRF7 / APC/C:Cdc20 mediated degradation of Cyclin B / regulation of translational fidelity / Regulation of FZD by ubiquitination / Downregulation of ERBB4 signaling / p75NTR recruits signalling complexes / APC-Cdc20 mediated degradation of Nek2A Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.9 Å | |||||||||
![]() | Yamamoto H / Collier M / Loerke J / Ismer J / Schmidt A / Hilal T / Sprink T / Yamamoto K / Mielke T / Burger J ...Yamamoto H / Collier M / Loerke J / Ismer J / Schmidt A / Hilal T / Sprink T / Yamamoto K / Mielke T / Burger J / Shaikh TR / Dabrowski M / Hildebrand PW / Scheerer P / Spahn CMT | |||||||||
![]() | ![]() Title: Molecular architecture of the ribosome-bound Hepatitis C Virus internal ribosomal entry site RNA. Authors: Hiroshi Yamamoto / Marianne Collier / Justus Loerke / Jochen Ismer / Andrea Schmidt / Tarek Hilal / Thiemo Sprink / Kaori Yamamoto / Thorsten Mielke / Jörg Bürger / Tanvir R Shaikh / ...Authors: Hiroshi Yamamoto / Marianne Collier / Justus Loerke / Jochen Ismer / Andrea Schmidt / Tarek Hilal / Thiemo Sprink / Kaori Yamamoto / Thorsten Mielke / Jörg Bürger / Tanvir R Shaikh / Marylena Dabrowski / Peter W Hildebrand / Patrick Scheerer / Christian M T Spahn / ![]() ![]() Abstract: Internal ribosomal entry sites (IRESs) are structured cis-acting RNAs that drive an alternative, cap-independent translation initiation pathway. They are used by many viruses to hijack the ...Internal ribosomal entry sites (IRESs) are structured cis-acting RNAs that drive an alternative, cap-independent translation initiation pathway. They are used by many viruses to hijack the translational machinery of the host cell. IRESs facilitate translation initiation by recruiting and actively manipulating the eukaryotic ribosome using only a subset of canonical initiation factor and IRES transacting factors. Here we present cryo-EM reconstructions of the ribosome 80S- and 40S-bound Hepatitis C Virus (HCV) IRES. The presence of four subpopulations for the 80S•HCV IRES complex reveals dynamic conformational modes of the complex. At a global resolution of 3.9 Å for the most stable complex, a derived atomic model reveals a complex fold of the IRES RNA and molecular details of its interaction with the ribosome. The comparison of obtained structures explains how a modular architecture facilitates mRNA loading and tRNA binding to the P-site. This information provides the structural foundation for understanding the mechanism of HCV IRES RNA-driven translation initiation. | |||||||||
History |
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Structure visualization
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 11.9 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 11 KB 11 KB | Display Display | ![]() |
Images | ![]() | 227.8 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 270.2 KB | Display | ![]() |
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Full document | ![]() | 269.3 KB | Display | |
Data in XML | ![]() | 7.3 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 5flxMC ![]() 3223C ![]() 3224C ![]() 3225C ![]() 3226C M: atomic model generated by this map C: citing same article ( |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Annotation | Reconstruction of ribosome complex | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.07 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 : Mammalian 80S-HCV-IRES complex, classical
Entire | Name: Mammalian 80S-HCV-IRES complex, classical |
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Components |
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-Supramolecule #1000: Mammalian 80S-HCV-IRES complex, classical
Supramolecule | Name: Mammalian 80S-HCV-IRES complex, classical / type: sample / ID: 1000 / Number unique components: 2 |
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Molecular weight | Theoretical: 4.6 MDa |
-Supramolecule #1: 80S ribosome
Supramolecule | Name: 80S ribosome / type: complex / ID: 1 / Recombinant expression: No / Ribosome-details: ribosome-eukaryote: ALL |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 4.5 MDa |
-Macromolecule #1: HCV-IRES
Macromolecule | Name: HCV-IRES / type: rna / ID: 1 / Classification: OTHER / Structure: DOUBLE HELIX / Synthetic?: Yes |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 162 KDa |
Sequence | String: GCCAGCCCCC UGAUGGGGGC GACACUCCAC CAUGAAUCAC UCCCCUGUGA GGAACUACUG UCUUCACGCA GAAAGCGUCU AGCCAUGGCG UUAGUAUGAG UGUCGUGCAG CCUCCAGGAC CCCCCCUCCC GGGAGAGCCA UAGUGGUCUG CGGAACCGGU GAGUACACCG ...String: GCCAGCCCCC UGAUGGGGGC GACACUCCAC CAUGAAUCAC UCCCCUGUGA GGAACUACUG UCUUCACGCA GAAAGCGUCU AGCCAUGGCG UUAGUAUGAG UGUCGUGCAG CCUCCAGGAC CCCCCCUCCC GGGAGAGCCA UAGUGGUCUG CGGAACCGGU GAGUACACCG GAAUUGCCAG GACGACCGGG UCCUUUCUUG GAUAAACCCG CUCAAUGCCU GGAGAUUUGG GCGUGCCCCC GCAAGACUGC UAGCCGAGUA GUGUUGGGUC GCGAAAGGCC UUGUGGUACU GCCUGAUAGG GUGCUUGCGA GUGCCCCGGG AGGUCUCGUA GACCGUGCAC CAUGAGCACG AAUCCUAAAC CUCAAAGAAA AACCAAACGU AACACCAACC GUCGCCCACA GGACGUCAAG UUCCCGGGUG GCGGUCUAGA CGCCGAGAUC AGAAAUCCCU CUCUCGGAUC GCAUUUGGAC UUCUGCCUUC GGGCACCACG GUCGGAUCCG AAUU |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Concentration | 0.15 mg/mL |
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Buffer | pH: 7.6 Details: 20mM Tris-HCl, 7.5mM MgCl2, 100mM KCl, 0.2mM spermidine, 2mM DTT |
Grid | Details: Quantifoil R3-3 Cu 300 mesh with 2 nm carbon support film |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 93 K / Instrument: FEI VITROBOT MARK I / Method: blot for 2-4 seconds before plunging |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Date | Oct 16, 2014 |
Image recording | Category: CCD / Film or detector model: FEI FALCON II (4k x 4k) / Number real images: 7707 / Average electron dose: 20 e/Å2 / Details: Automated data collection on using EPU |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Calibrated magnification: 130293 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 4.0 µm / Nominal defocus min: 1.0 µm / Nominal magnification: 75000 |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
CTF correction | Details: CTFFIND3 |
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Final reconstruction | Applied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.9 Å / Resolution method: OTHER / Software - Name: spider, sparx Details: To avoid overfitting, the data was refined in a resolution-limited scheme using SPIDER. A final local refinement and the final reconstruction were calculated in Sparx. Number images used: 171820 |