2J37

MODEL OF MAMMALIAN SRP BOUND TO 80S RNCS


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 8.7 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.3 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:  
  • Also Cited By: 3KL4

  • 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

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
60S RIBOSOMAL PROTEIN L23
4
152Zea maysMutation(s): 0 
Find proteins for O81229 (Zea mays)
Go to UniProtKB:  O81229
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
RIBOSOMAL PROTEIN L35
5
124Triticum aestivumMutation(s): 0 
Gene Names: RPL35
Find proteins for Q8L805 (Triticum aestivum)
Go to Gene View: RPL35
Go to UniProtKB:  Q8L805
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
RIBOSOMAL PROTEIN L31
6
123Zea maysMutation(s): 0 
Find proteins for Q5XLD9 (Zea mays)
Go to UniProtKB:  Q5XLD9
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
SIGNAL RECOGNITION PARTICLE 19 KDA PROTEIN (SRP19)
B
108Homo sapiensMutation(s): 0 
Gene Names: SRP19
Find proteins for P09132 (Homo sapiens)
Go to Gene View: SRP19
Go to UniProtKB:  P09132
Entity ID: 6
MoleculeChainsSequence LengthOrganismDetails
SIGNAL SEQUENCE
S
17Alligator sinensisMutation(s): 0 
Find proteins for Q1WHN3 (Alligator sinensis)
Go to UniProtKB:  Q1WHN3
Entity ID: 7
MoleculeChainsSequence LengthOrganismDetails
SIGNAL RECOGNITION PARTICLE 54 KDA PROTEIN (SRP54)
W
504Canis lupus familiarisMutation(s): 0 
Gene Names: SRP54
Find proteins for P61010 (Canis lupus familiaris)
Go to Gene View: SRP54
Go to UniProtKB:  P61010
Entity ID: 4
MoleculeChainsLengthOrganism
SRP RNAA128Canis sp.
Entity ID: 8
MoleculeChainsLengthOrganism
RIBOSOMAL RNAZ280Haloarcula marismortui
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 8.7 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-11-08
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2018-03-07
    Type: Data collection, Database references, Structure summary