2J37

MODEL OF MAMMALIAN SRP BOUND TO 80S RNCS

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 8.70 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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This is version 1.4 of the entry. See complete history. 


Literature

Following the signal sequence from ribosomal tunnel exit to signal recognition particle.

Halic, M., Blau, M., Becker, T., Mielke, T., Pool, M.R., Wild, K., Sinning, I., Beckmann, R.

(2006) Nature 444: 507-511

  • DOI: 10.1038/nature05326
  • Primary Citation of Related Structures:  
    2J28, 2J37

  • PubMed Abstract: 

    • Membrane and secretory proteins can be co-translationally inserted into or translocated across the membrane. This process is dependent on signal sequence recognition on the ribosome by the signal recognition particle (SRP), which results in targeting of the ribosome-nascent-chain complex to the protein-conducting channel at the membrane ...

    Membrane and secretory proteins can be co-translationally inserted into or translocated across the membrane. This process is dependent on signal sequence recognition on the ribosome by the signal recognition particle (SRP), which results in targeting of the ribosome-nascent-chain complex to the protein-conducting channel at the membrane. Here we present an ensemble of structures at subnanometre resolution, revealing the signal sequence both at the ribosomal tunnel exit and in the bacterial and eukaryotic ribosome-SRP complexes. Molecular details of signal sequence interaction in both prokaryotic and eukaryotic complexes were obtained by fitting high-resolution molecular models. The signal sequence is presented at the ribosomal tunnel exit in an exposed position ready for accommodation in the hydrophobic groove of the rearranged SRP54 M domain. Upon ribosome binding, the SRP54 NG domain also undergoes a conformational rearrangement, priming it for the subsequent docking reaction with the NG domain of the SRP receptor. These findings provide the structural basis for improving our understanding of the early steps of co-translational protein sorting.

    Organizational Affiliation: 

    Gene Center, Department of Chemistry and Biochemistry, University of Munich, Feodor-Lynen-Strasse 25, 81377 Munich, Germany.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
60S RIBOSOMAL PROTEIN L23A [auth 4]152Triticum sp.Mutation(s): 0 
Find proteins for O81229 (Zea mays)
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
RIBOSOMAL PROTEIN L35B [auth 5]124Triticum sp.Mutation(s): 0 
Find proteins for Q8L805 (Triticum aestivum)
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
RIBOSOMAL PROTEIN L31C [auth 6]123Triticum sp.Mutation(s): 0 
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
SIGNAL RECOGNITION PARTICLE 19 KDA PROTEIN (SRP19)E [auth B]108Homo sapiensMutation(s): 0 
Gene Names: SRP19
Find proteins for P09132 (Homo sapiens)
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NIH Common Fund Data Resources
GTEx:  ENSG00000153037
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
SIGNAL SEQUENCEF [auth S]17Canis sp.Mutation(s): 0 
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
SIGNAL RECOGNITION PARTICLE 54 KDA PROTEIN (SRP54)G [auth W]504Canis sp.Mutation(s): 0 
EC: 3.6.5
Find proteins for P61010 (Canis lupus familiaris)
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Entity ID: 4
MoleculeChainsLengthOrganismImage
SRP RNAD [auth A]128Canis sp.
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Entity ID: 8
MoleculeChainsLengthOrganismImage
RIBOSOMAL RNAH [auth Z]280Haloarcula marismortui
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 8.70 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-11-08
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-03-07
    Changes: Data collection, Database references, Structure summary
  • Version 1.4: 2019-04-10
    Changes: Data collection, Database references, Source and taxonomy