+Open data
-Basic information
Entry | Database: PDB / ID: 4v92 | ||||||||||||
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Title | Kluyveromyces lactis 80S ribosome in complex with CrPV-IRES | ||||||||||||
Components |
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Keywords | RIBOSOME / EUKARYOTIC / TRANSLATION / INITIATION / IRES | ||||||||||||
Function / homology | RNA / RNA (> 10) / RNA (> 100) / RNA (> 1000) Function and homology information | ||||||||||||
Biological species | KLUYVEROMYCES LACTIS (yeast) CRICKET PARALYSIS VIRUS | ||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.7 Å | ||||||||||||
Authors | Fernandez, I.S. / Bai, X. / Scheres, S.H.W. / Ramakrishnan, V. | ||||||||||||
Citation | Journal: Cell / Year: 2014 Title: Initiation of translation by cricket paralysis virus IRES requires its translocation in the ribosome. Authors: Israel S Fernández / Xiao-Chen Bai / Garib Murshudov / Sjors H W Scheres / V Ramakrishnan / Abstract: The cricket paralysis virus internal ribosome entry site (CrPV-IRES) is a folded structure in a viral mRNA that allows initiation of translation in the absence of any host initiation factors. By ...The cricket paralysis virus internal ribosome entry site (CrPV-IRES) is a folded structure in a viral mRNA that allows initiation of translation in the absence of any host initiation factors. By using recent advances in single-particle electron cryomicroscopy, we have solved the structure of CrPV-IRES bound to the ribosome of the yeast Kluyveromyces lactis in both the canonical and rotated states at overall resolutions of 3.7 and 3.8 Å, respectively. In both states, the pseudoknot PKI of the CrPV-IRES mimics a tRNA/mRNA interaction in the decoding center of the A site of the 40S ribosomal subunit. The structure and accompanying factor-binding data show that CrPV-IRES binding mimics a pretranslocation rather than initiation state of the ribosome. Translocation of the IRES by elongation factor 2 (eEF2) is required to bring the first codon of the mRNA into the A site and to allow the start of translation. | ||||||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | Molecule: MolmilJmol/JSmol |
-Downloads & links
-Download
PDBx/mmCIF format | 4v92.cif.gz | 2.1 MB | Display | PDBx/mmCIF format |
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PDB format | pdb4v92.ent.gz | Display | PDB format | |
PDBx/mmJSON format | 4v92.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Summary document | 4v92_validation.pdf.gz | 1.1 MB | Display | wwPDB validaton report |
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Full document | 4v92_full_validation.pdf.gz | 1.6 MB | Display | |
Data in XML | 4v92_validation.xml.gz | 147.6 KB | Display | |
Data in CIF | 4v92_validation.cif.gz | 255.7 KB | Display | |
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/v9/4v92 ftp://data.pdbj.org/pub/pdb/validation_reports/v9/4v92 | HTTPS FTP |
-Related structure data
Related structure data | 2603MC 2604MC 2599C 4v91C C: citing same article (ref.) M: map data used to model this data |
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Similar structure data |
-Links
-Assembly
Deposited unit |
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1 |
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-Components
-RNA chain , 2 types, 2 molecules A2AZ
#1: RNA chain | Mass: 569191.250 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: 18S RRNA / Source: (natural) KLUYVEROMYCES LACTIS (yeast) |
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#2: RNA chain | Mass: 60767.703 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: CRICKET-PARALYSIS-VIRUS-IRES / Source: (natural) CRICKET PARALYSIS VIRUS |
+Protein , 33 types, 33 molecules BABBBCBDBEBFBGBHBIBJBKBLBMBNBOBPBQBRBSBTBUBVBWBXBYBZBaBbBcBd...
-Details
Has protein modification | Y |
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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 |
-Sample preparation
Component | Name: Kluyveromyces lactis 80S ribosome in complex with CrPV-IRES Type: RIBOSOME |
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Buffer solution | pH: 6.5 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Specimen support | Details: CARBON |
Vitrification | Instrument: FEI VITROBOT MARK I / Cryogen name: PROPANE / Details: LIQUID ETHANE |
-Electron microscopy imaging
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS / Date: Jul 7, 2013 |
Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: OTHER |
Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 47000 X / Nominal defocus max: 3 nm / Nominal defocus min: 1.8 nm / Cs: 2.7 mm |
Image recording | Electron dose: 40 e/Å2 / Film or detector model: FEI FALCON II (4k x 4k) |
Image scans | Num. digital images: 1900 |
Radiation wavelength | Relative weight: 1 |
-Processing
EM software |
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CTF correction | Details: EACH PARTICLE | ||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||
3D reconstruction | Method: RELION / Resolution: 3.7 Å / Num. of particles: 18132 / Nominal pixel size: 1.34 Å / Symmetry type: POINT | ||||||||||||
Atomic model building | B value: 60 / Protocol: FLEXIBLE FIT / Space: RECIPROCAL / Target criteria: R-FACTOR, FSC / Details: METHOD--FLEXIBLE | ||||||||||||
Atomic model building | PDB-ID: 3B31 Accession code: 3B31 / Source name: PDB / Type: experimental model | ||||||||||||
Refinement | Highest resolution: 3.7 Å | ||||||||||||
Refinement step | Cycle: LAST / Highest resolution: 3.7 Å
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