4UE5

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


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 9.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.6 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
  • Primary Citation of Related Structures:  
    4UE4, 4UE5

  • 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

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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
SRP14B75Canis lupus familiarisMutation(s): 0 
Gene Names: SRP14
Find proteins for P16255 (Canis lupus familiaris)
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  • Reference Sequence
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
SIGNAL RECOGNITION PARTICLE 9 KDA PROTEINF107Canis lupus familiarisMutation(s): 0 
Gene Names: SRP19
Find proteins for J9PAS6 (Canis lupus familiaris)
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
SIGNAL RECOGNITION PARTICLE SUBUNIT SRP68C195Canis lupus familiarisMutation(s): 0 
Gene Names: SRP68
Find proteins for Q00004 (Canis lupus familiaris)
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
SIGNAL RECOGNITION PARTICLE 54 KDA PROTEIND433Canis lupus familiarisMutation(s): 0 
Gene Names: SRP54
EC: 3.6.5
Find proteins for P61010 (Canis lupus familiaris)
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
SRP9E74Canis lupus familiarisMutation(s): 0 
Gene Names: SRP9
Find proteins for P21262 (Canis lupus familiaris)
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
SIGNAL SEQUENCES18Canis lupus familiarisMutation(s): 0 
Gene Names: RHO
Find proteins for P32308 (Canis lupus familiaris)
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  • Reference Sequence
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Entity ID: 1
MoleculeChainsLengthOrganismImage
7S RNAA299Canis lupus familiaris
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 9.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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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: 2018-06-20
    Changes: Advisory, Data collection, Derived calculations
  • Version 1.5: 2018-10-03
    Changes: Data collection, Derived calculations
  • Version 1.6: 2018-10-24
    Changes: Advisory, Data collection, Derived calculations