4UE4

Structural basis for targeting and elongation arrest of Bacillus signal recognition particle


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Translational Arrest by a Prokaryotic Signal Recognition Particle is Mediated by RNA Interactions.

Beckert, B.Kedrov, A.Sohmen, D.Kempf, G.Wild, K.Sinning, I.Stahlberg, H.Wilson, D.N.Beckmann, R.

(2015) Nat Struct Mol Biol 22: 767

  • DOI: 10.1038/nsmb.3086
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The signal recognition particle (SRP) recognizes signal sequences of nascent polypeptides and targets ribosome-nascent chain complexes to membrane translocation sites. In eukaryotes, translating ribosomes are slowed down by the Alu domain of SRP to a ...

    The signal recognition particle (SRP) recognizes signal sequences of nascent polypeptides and targets ribosome-nascent chain complexes to membrane translocation sites. In eukaryotes, translating ribosomes are slowed down by the Alu domain of SRP to allow efficient targeting. In prokaryotes, however, little is known about the structure and function of Alu domain-containing SRPs. Here, we report a complete molecular model of SRP from the Gram-positive bacterium Bacillus subtilis, based on cryo-EM. The SRP comprises two subunits, 6S RNA and SRP54 or Ffh, and it facilitates elongation slowdown similarly to its eukaryotic counterpart. However, protein contacts with the small ribosomal subunit observed for the mammalian Alu domain are substituted in bacteria by RNA-RNA interactions of 6S RNA with the α-sarcin-ricin loop and helices H43 and H44 of 23S rRNA. Our findings provide a structural basis for cotranslational targeting and RNA-driven elongation arrest in prokaryotes.


    Organizational Affiliation

    Center for Integrated Protein Science Munich (CIPSM), Munich, Germany.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
FTSQ SIGNAL SEQUENCE
B
22Bacillus subtilis subsp. subtilis str. 168Mutation(s): 0 
Find proteins for P06136 (Escherichia coli (strain K12))
Go to UniProtKB:  P06136

Find similar proteins by: Sequence  |  Structure

Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
SIGNAL RECOGNITION PARTICLE PROTEIN
C
102Bacillus subtilis subsp. subtilis str. 168Mutation(s): 0 
Gene Names: ffhBSU15980
Find proteins for P37105 (Bacillus subtilis (strain 168))
Go to UniProtKB:  P37105

Find similar nucleic acids by: Sequence   |  Structure

Entity ID: 1
MoleculeChainsLengthOrganism
6S RNAA266Bacillus subtilis subsp. subtilis str. 168
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-09-09
    Type: Initial release
  • Version 1.1: 2015-09-23
    Changes: Database references
  • Version 1.2: 2015-10-21
    Changes: Database references
  • Version 1.3: 2017-08-30
    Changes: Data collection
  • Version 1.4: 2018-10-03
    Changes: Data collection