2HUA

Solution Structure of CSFV IRES Domain IIa


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 11 
  • Selection Criteria: lowest restraint violation and total energy 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

HCV and CSFV IRES domain II mediate eIF2 release during 80S ribosome assembly.

Locker, N.Easton, L.E.Lukavsky, P.J.

(2007) EMBO J 26: 795-805

  • DOI: https://doi.org/10.1038/sj.emboj.7601549
  • Primary Citation of Related Structures:  
    2HUA

  • PubMed Abstract: 

    Internal ribosome entry site (IRES) RNAs from the hepatitis C virus (HCV) and classical swine fever virus (CSFV) coordinate cap-independent assembly of eukaryotic 48S initiation complexes, consisting of the 40S ribosomal subunit, eukaryotic initiation factor (eIF) 3 and the eIF2/GTP/Met-tRNA(i)(Met) ternary complex. Here, we report that these IRESes also play a functional role during 80S ribosome assembly downstream of 48S complex formation, in promoting eIF5-induced GTP hydrolysis and eIF2/GDP release from the initiation complex. We show that this function is encoded in their independently folded IRES domain II and that it depends both on its characteristic bent conformation and two conserved RNA motifs, an apical hairpin loop and a loop E. Our data suggest a general mode of subunit joining in HCV and HCV-like IRESes.


  • Organizational Affiliation

    MRC Laboratory of Molecular Biology, Hills Road, Cambridge CB2 2QH, UK.


Macromolecules
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Entity ID: 1
MoleculeChains LengthOrganismImage
CSFV IRES Domain IIa40N/A
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 11 
  • Selection Criteria: lowest restraint violation and total energy 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-04-17
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-03-09
    Changes: Data collection, Database references, Derived calculations
  • Version 1.4: 2024-05-29
    Changes: Data collection