1ZN0

Coordinates of RRF and EF-G fitted into Cryo-EM map of the 50S subunit bound with both EF-G (GDPNP) and RRF


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 15.5 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 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:  
    1ZN0, 1ZN1

  • 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 recycling factor) and EF-G (elongation factor G) ...

    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
    • 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

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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Ribosome recycling factorB [auth A]185Escherichia coliMutation(s): 0 
UniProt
Find proteins for P0A805 (Escherichia coli (strain K12))
Explore P0A805 
Go to UniProtKB:  P0A805
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UniProt GroupP0A805
Protein Feature View
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
ELONGATION FACTOR GC [auth B]655Escherichia coliMutation(s): 0 
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Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Protein Feature View
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  • Reference Sequence
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Entity ID: 1
MoleculeChainsLengthOrganismImage
16S RIBOSOMAL RNAA [auth C]40Escherichia coli
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 15.5 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: 2005-06-14
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance