2J28

MODEL OF E. COLI SRP BOUND TO 70S RNCS


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 9.50 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.5 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: 508-511

  • 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 ...

    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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50S RIBOSOMAL PROTEIN L32056Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L33154Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L34246Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L35364Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L36438Escherichia coliMutation(s): 0 
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Entity ID: 6
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SIGNAL SEQUENCE718Escherichia coliMutation(s): 0 
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SIGNAL RECOGNITION PARTICLE 549430Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L2C267Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L4E201Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L5F178Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L6G176Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L9H149Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L13J140Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L14K121Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L15L144Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L16M136Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L17N127Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L18O117Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L19P114Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L20Q117Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L22S110Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L23T99Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L25V94Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L27W84Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L29X63Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L30Y58Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L31Z70Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L3D209Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L11I141Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L21R103Escherichia coliMutation(s): 0 
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50S RIBOSOMAL PROTEIN L24U102Escherichia coliMutation(s): 0 
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MoleculeChainsLengthOrganismImage
4.5S SIGNAL RECOGNITION PARTICLE RNA874Escherichia coli
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Entity ID: 9
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5S RIBOSOMAL RNAA117Escherichia coli
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Entity ID: 10
MoleculeChainsLengthOrganismImage
23S RIBOSOMAL RNAB2904Escherichia coli
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download CCD File 
B, N
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 9.50 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • 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: 2017-04-19
    Changes: Other
  • Version 1.4: 2017-08-30
    Changes: Data collection, Source and taxonomy
  • Version 1.5: 2018-10-03
    Changes: Data collection, Derived calculations