3BBV

The tRNA(phe) fitted into the low resolution Cryo-EM map of the 50S.nc-tRNA.Hsp15 complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 2.0 of the entry. See complete history

Literature

Recycling of Aborted Ribosomal 50S Subunit-Nascent Chain-tRNA Complexes by the Heat Shock Protein Hsp15.

Jiang, L.Schaffitzel, C.Bingel-Erlenmeyer, R.Ban, N.Korber, P.Koning, R.I.de Geus, D.C.Plaisier, J.R.Abrahams, J.P.

(2009) J.Mol.Biol. 386: 1357-1367

  • DOI: 10.1016/j.jmb.2008.10.079
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • When heat shock prematurely dissociates a translating bacterial ribosome, its 50S subunit is prevented from reinitiating protein synthesis by tRNA covalently linked to the unfinished protein chain that remains threaded through the exit tunnel. Hsp15, ...

    When heat shock prematurely dissociates a translating bacterial ribosome, its 50S subunit is prevented from reinitiating protein synthesis by tRNA covalently linked to the unfinished protein chain that remains threaded through the exit tunnel. Hsp15, a highly upregulated bacterial heat shock protein, reactivates such dead-end complexes. Here, we show with cryo-electron microscopy reconstructions and functional assays that Hsp15 translocates the tRNA moiety from the A site to the P site of stalled 50S subunits. By stabilizing the tRNA in the P site, Hsp15 indirectly frees up the A site, allowing a release factor to land there and cleave off the tRNA. Such a release factor must be stop codon independent, suggesting a possible role for a poorly characterized class of putative release factors that are upregulated by cellular stress, lack a codon recognition domain and are conserved in eukaryotes.


    Organizational Affiliation

    Department of Biophysical Structural Chemistry, Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsLengthOrganism
tRNA(Phe)z76Thermus thermophilus
Small Molecules
Modified Residues  6 Unique
IDChainsTypeFormula2D DiagramParent
PSU
Query on PSU
z
RNA LINKINGC9 H13 N2 O9 PU
4SU
Query on 4SU
z
RNA LINKINGC9 H13 N2 O8 P SU
MIA
Query on MIA
z
RNA LINKINGC16 H24 N5 O7 P SA
7MG
Query on 7MG
z
RNA LINKINGC11 H18 N5 O8 PG
5MU
Query on 5MU
z
RNA LINKINGC10 H15 N2 O9 PU
H2U
Query on H2U
z
RNA LINKINGC9 H15 N2 O9 PU
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-10-21
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2018-07-18
    Type: Data collection
  • Version 2.0: 2019-07-03
    Type: Data collection, Derived calculations, Non-polymer description, Structure summary