3BNQ

Crystal Structure of the Homo sapiens Mitochondrial Ribosomal Decoding Site in the Presence of SrCl2 (A1555G mutant, Br-derivative)

  • Classification: RNA
  • Mutation(s): No 

  • Deposited: 2007-12-14 Released: 2008-06-24 
  • Deposition Author(s): Kondo, J., Westhof, E.

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.229 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

The bacterial and mitochondrial ribosomal A-site molecular switches possess different conformational substates

Kondo, J.Westhof, E.

(2008) Nucleic Acids Res 36: 2654-2666

  • DOI: 10.1093/nar/gkn112
  • Primary Citation of Related Structures:  
    3BNO, 3BNP, 3BNQ, 3BNR, 3BNS, 3BNT, 3BNL, 3BNN

  • PubMed Abstract: 
  • The A site of the small ribosomal subunit participates in the fidelity of decoding by switching between two states, a resting 'off' state and an active decoding 'on' state. Eight crystal structures of RNA duplexes containing two minimal decoding A sites of the Homo sapiens mitochondrial wild-type, the A1555G mutant or bacteria have been solved ...

    The A site of the small ribosomal subunit participates in the fidelity of decoding by switching between two states, a resting 'off' state and an active decoding 'on' state. Eight crystal structures of RNA duplexes containing two minimal decoding A sites of the Homo sapiens mitochondrial wild-type, the A1555G mutant or bacteria have been solved. The resting 'off' state of the mitochondrial wild-type A site is surprisingly different from that of the bacterial A site. The mitochondrial A1555G mutant has two types of the 'off' states; one is similar to the mitochondrial wild-type 'off' state and the other is similar to the bacterial 'off' state. Our present results indicate that the dynamics of the A site in bacteria and mitochondria are different, a property probably related to the small number of tRNAs used for decoding in mitochondria. Based on these structures, we propose a hypothesis for the molecular mechanism of non-syndromic hearing loss due to the mitochondrial A1555G mutation.


    Organizational Affiliation

    Architecture et Réactivité de l'ARN, Université Louis Pasteur, Institut de Biologie Moléculaire et Cellulaire, CNRS, 15 rue René Descartes, 67084 Strasbourg, France.



Macromolecules
Find similar nucleic acids by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsLengthOrganismImage
A site of human mitochondrial ribosome, A chainA, B, C23N/A
Find similar nucleic acids by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsLengthOrganismImage
A site of human mitochondrial ribosome, B chainD21N/A
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.229 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 71.266α = 90
b = 76.056β = 117.06
c = 55.912γ = 90
Software Package:
Software NamePurpose
SCALAdata processing
SOLVEphasing
CNSrefinement
PDB_EXTRACTdata extraction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2007-12-14 
  • Released Date: 2008-06-24 
  • Deposition Author(s): Kondo, J., Westhof, E.

Revision History  (Full details and data files)

  • Version 1.0: 2008-06-24
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance