1ZN1

Coordinates of RRF fitted into Cryo-EM map of the 70S post-termination complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 14.1 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

Mechanism for the disassembly of the posttermination complex inferred from cryo-EM studies.

Gao, N.Zavialov, A.V.Li, W.Sengupta, J.Valle, M.Gursky, R.P.Ehrenberg, M.Frank, J.

(2005) Mol.Cell 18: 663-674

  • DOI: 10.1016/j.molcel.2005.05.005
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Ribosome recycling, the disassembly of the posttermination complex after each round of protein synthesis, is an essential step in mRNA translation, but its mechanism has remained obscure. In eubacteria, recycling is catalyzed by RRF (ribosome recycli ...

    Ribosome recycling, the disassembly of the posttermination complex after each round of protein synthesis, is an essential step in mRNA translation, but its mechanism has remained obscure. In eubacteria, recycling is catalyzed by RRF (ribosome recycling factor) and EF-G (elongation factor G). By using cryo-electron microscopy, we have obtained two density maps, one of the RRF bound posttermination complex and one of the 50S subunit bound with both EF-G and RRF. Comparing the two maps, we found domain I of RRF to be in the same orientation, while domain II in the EF-G-containing 50S subunit is extensively rotated (approximately 60 degrees) compared to its orientation in the 70S complex. Mapping the 50S conformation of RRF onto the 70S posttermination complex suggests that it can disrupt the intersubunit bridges B2a and B3, and thus effect a separation of the two subunits. These observations provide the structural basis for the mechanism by which the posttermination complex is split into subunits by the joint action of RRF and EF-G.


    Related Citations: 
    • Locking and unlocking of ribosomal motions
      Valle, M.,Zavialov, A.,Sengupta, J.,Rawat, U.,Ehrenberg, M.,Frank, J.
      (2003) Cell 114: 123
    • Study of structural dynamics of E.coli 70S ribosome using real-space refinement
      Gao, H.,Sengupta, J.,Valle, M.,Korostelev, A.,Eswar, N.,Stagg, S.M.,Van Roey, P.,Agrawal, R.K.,Harvey, S.C.,Sali, A.,Chapman, M.S.,Frank, J.
      (2003) Cell 113: 789
    • Crystal structure of the ribosome recycling factor from E.coli
      Kim, K.K.,Min, K.,Suh, S.W.
      (2000) Embo J. 19: 2362


    Organizational Affiliation

    Wadsworth Center, State University of New York at Albany, Empire State Plaza, Albany, New York 12201, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Ribosome recycling factor
A
185Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: frr (rrf)
Find proteins for P0A805 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A805
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
30S ribosomal protein S12
L
97Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: rpsL (strA)
Find proteins for P0A7S3 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A7S3
Entity ID: 1
MoleculeChainsLengthOrganism
ribosomal 23S RNAB59Escherichia coli
Entity ID: 2
MoleculeChainsLengthOrganism
ribosomal 16S RNAC40Escherichia coli
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 14.1 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: 2005-06-14
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2018-01-31
    Type: Data collection, Database references