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, a h ...

    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: 3
MoleculeChainsSequence LengthOrganismDetailsImage
50S ribosomal protein L25 V94Escherichia coliMutation(s): 0 
Find proteins for P68919 (Escherichia coli (strain K12))
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Entity ID: 4
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50S ribosomal protein L2 C273Escherichia coliMutation(s): 0 
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Entity ID: 5
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50S ribosomal protein L3 D209Escherichia coliMutation(s): 0 
Find proteins for P60438 (Escherichia coli (strain K12))
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Entity ID: 6
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50S ribosomal protein L4 E201Escherichia coliMutation(s): 0 
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Entity ID: 7
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50S ribosomal protein L5 F178Escherichia coliMutation(s): 0 
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Entity ID: 8
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50S ribosomal protein L6 G176Escherichia coliMutation(s): 0 
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Entity ID: 9
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50S ribosomal protein L9 H149Escherichia coliMutation(s): 0 
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Entity ID: 10
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50S ribosomal protein L13 J142Escherichia coliMutation(s): 0 
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Entity ID: 11
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50S ribosomal protein L14 K123Escherichia coliMutation(s): 0 
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Entity ID: 12
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50S ribosomal protein L15 L144Escherichia coliMutation(s): 0 
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Entity ID: 13
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50S ribosomal protein L16 M136Escherichia coliMutation(s): 0 
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Entity ID: 14
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50S ribosomal protein L17 N127Escherichia coliMutation(s): 0 
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Entity ID: 15
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50S ribosomal protein L18 O117Escherichia coliMutation(s): 0 
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Entity ID: 16
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50S ribosomal protein L19 P114Escherichia coliMutation(s): 0 
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Entity ID: 17
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50S ribosomal protein L20 Q117Escherichia coliMutation(s): 0 
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Entity ID: 18
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50S ribosomal protein L21 R103Escherichia coliMutation(s): 0 
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Entity ID: 19
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50S ribosomal protein L22 S110Escherichia coliMutation(s): 0 
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Entity ID: 20
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50S ribosomal protein L23 T100Escherichia coliMutation(s): 0 
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Entity ID: 21
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50S ribosomal protein L24 U103Escherichia coliMutation(s): 0 
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Entity ID: 22
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50S ribosomal protein L27 W84Escherichia coliMutation(s): 0 
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Entity ID: 23
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50S ribosomal protein L29 X63Escherichia coliMutation(s): 0 
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Entity ID: 24
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50S ribosomal protein L30 Y58Escherichia coliMutation(s): 0 
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Entity ID: 25
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50S ribosomal protein L31 Z70Escherichia coliMutation(s): 0 
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Entity ID: 26
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50S ribosomal protein L32 056Escherichia coliMutation(s): 0 
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Entity ID: 27
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50S ribosomal protein L33 154Escherichia coliMutation(s): 0 
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Entity ID: 28
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50S ribosomal protein L34 246Escherichia coliMutation(s): 0 
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Entity ID: 29
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50S ribosomal protein L35 364Escherichia coliMutation(s): 0 
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50S ribosomal protein L36 438Escherichia coliMutation(s): 0 
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Entity ID: 1
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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 Ideal Coordinates 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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View more in-depth experimental data

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