3BBX

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


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 10.0 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.2 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:  
    3BBU, 3BBV, 3BBX

  • 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

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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
50S ribosomal protein L4E201Escherichia coliMutation(s): 0 
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Entity ID: 29
MoleculeChainsSequence LengthOrganismDetailsImage
50S ribosomal protein L35364Escherichia coliMutation(s): 0 
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Entity ID: 10
MoleculeChainsSequence LengthOrganismDetailsImage
50S ribosomal protein L13J142Escherichia coliMutation(s): 0 
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Entity ID: 11
MoleculeChainsSequence LengthOrganismDetailsImage
50S ribosomal protein L14K123Escherichia coliMutation(s): 0 
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Entity ID: 12
MoleculeChainsSequence LengthOrganismDetailsImage
50S ribosomal protein L15L144Escherichia coliMutation(s): 0 
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Entity ID: 13
MoleculeChainsSequence LengthOrganismDetailsImage
50S ribosomal protein L16M136Escherichia coliMutation(s): 0 
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Entity ID: 14
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50S ribosomal protein L17N127Escherichia coliMutation(s): 0 
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Entity ID: 15
MoleculeChainsSequence LengthOrganismDetailsImage
50S ribosomal protein L18O117Escherichia coliMutation(s): 0 
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Entity ID: 16
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50S ribosomal protein L19P114Escherichia coliMutation(s): 0 
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Entity ID: 17
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50S ribosomal protein L20Q117Escherichia coliMutation(s): 0 
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Entity ID: 18
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50S ribosomal protein L21R103Escherichia coliMutation(s): 0 
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Entity ID: 19
MoleculeChainsSequence LengthOrganismDetailsImage
50S ribosomal protein L22S110Escherichia coliMutation(s): 0 
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Entity ID: 20
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50S ribosomal protein L23T100Escherichia coliMutation(s): 0 
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Entity ID: 21
MoleculeChainsSequence LengthOrganismDetailsImage
50S ribosomal protein L24U103Escherichia coliMutation(s): 0 
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Entity ID: 22
MoleculeChainsSequence LengthOrganismDetailsImage
50S ribosomal protein L27W84Escherichia coliMutation(s): 0 
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Entity ID: 23
MoleculeChainsSequence LengthOrganismDetailsImage
50S ribosomal protein L29X63Escherichia coliMutation(s): 0 
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Entity ID: 24
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50S ribosomal protein L30Y58Escherichia coliMutation(s): 0 
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Entity ID: 25
MoleculeChainsSequence LengthOrganismDetailsImage
50S ribosomal protein L31Z70Escherichia coliMutation(s): 0 
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Entity ID: 26
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50S ribosomal protein L32056Escherichia coliMutation(s): 0 
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Entity ID: 27
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50S ribosomal protein L33154Escherichia coliMutation(s): 0 
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Entity ID: 28
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50S ribosomal protein L34246Escherichia coliMutation(s): 0 
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
50S ribosomal protein L25V94Escherichia coliMutation(s): 0 
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Entity ID: 30
MoleculeChainsSequence LengthOrganismDetailsImage
50S ribosomal protein L36438Escherichia coliMutation(s): 0 
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
50S ribosomal protein L2C273Escherichia coliMutation(s): 0 
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
50S ribosomal protein L3D209Escherichia coliMutation(s): 0 
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
50S ribosomal protein L5F178Escherichia coliMutation(s): 0 
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
50S ribosomal protein L6G176Escherichia coliMutation(s): 0 
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Entity ID: 9
MoleculeChainsSequence LengthOrganismDetailsImage
50S ribosomal protein L9H149Escherichia coliMutation(s): 0 
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Entity ID: 1
MoleculeChainsLengthOrganismImage
5S ribosomal RNAA120Escherichia coli
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Entity ID: 2
MoleculeChainsLengthOrganismImage
23S ribosomal RNAB2904Escherichia coli
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download CCD File 
2, B, C, E, L, Q, S, T, U
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 10.0 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-10-21
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2018-07-18
    Changes: Data collection