2NOQ

Structure of ribosome-bound cricket paralysis virus IRES RNA


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.30 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Starting Models: experimental
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This is version 1.4 of the entry. See complete history


Literature

Structure of the ribosome-bound cricket paralysis virus IRES RNA.

Schuler, M.Connell, S.R.Lescoute, A.Giesebrecht, J.Dabrowski, M.Schroeer, B.Mielke, T.Penczek, P.A.Westhof, E.Spahn, C.M.

(2006) Nat Struct Mol Biol 13: 1092-1096

  • DOI: https://doi.org/10.1038/nsmb1177
  • Primary Citation of Related Structures:  
    2NOQ

  • PubMed Abstract: 

    Internal ribosome entry sites (IRESs) facilitate an alternative, end-independent pathway of translation initiation. A particular family of dicistroviral IRESs can assemble elongation-competent 80S ribosomal complexes in the absence of canonical initiation factors and initiator transfer RNA. We present here a cryo-EM reconstruction of a dicistroviral IRES bound to the 80S ribosome. The resolution of the cryo-EM reconstruction, in the subnanometer range, allowed the molecular structure of the complete IRES in its active, ribosome-bound state to be solved. The structure, harboring three pseudoknot-containing domains, each with a specific functional role, shows how defined elements of the IRES emerge from a compactly folded core and interact with the key ribosomal components that form the A, P and E sites, where tRNAs normally bind. Our results exemplify the molecular strategy for recruitment of an IRES and reveal the dynamic features necessary for internal initiation.


  • Organizational Affiliation

    Institut für Medizinische Physik und Biophysik, Charite-Universitätsmedizin Berlin, Ziegelstrasse 5-9, 10117-Berlin, Germany.


Macromolecules

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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S5150Saccharomyces cerevisiaeMutation(s): 0 
UniProt
Find proteins for P26783 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Go to UniProtKB:  P26783
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UniProt GroupP26783
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
60S ribosomal protein L1213Saccharomyces cerevisiaeMutation(s): 0 
UniProt
Find proteins for P0CX43 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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UniProt GroupP0CX43
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Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
60S ribosomal protein L11-B165Saccharomyces cerevisiaeMutation(s): 0 
UniProt
Find proteins for Q3E757 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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UniProt GroupQ3E757
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Entity ID: 1
MoleculeChains LengthOrganismImage
CrPV IRES190N/A
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Entity ID: 2
MoleculeChains LengthOrganismImage
18S ribosomal RNA46Saccharomyces cerevisiae
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Entity ID: 3
MoleculeChains LengthOrganismImage
18S ribosomal RNA13Saccharomyces cerevisiae
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Entity ID: 4
MoleculeChains LengthOrganismImage
18S ribosomal RNA15Saccharomyces cerevisiae
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Entity ID: 5
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25S ribosomal RNA53Saccharomyces cerevisiae
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.30 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-11-21
    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: 2012-02-15
    Changes: Atomic model
  • Version 1.4: 2023-12-27
    Changes: Data collection, Database references, Refinement description