1ZO1

IF2, IF1, and tRNA fitted to cryo-EM data OF E. COLI 70S initiation complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 13.8 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

The Cryo-EM Structure of a Translation Initiation Complex from Escherichia coli.

Allen, G.S.Zavialov, A.Gursky, R.Ehrenberg, M.Frank, J.

(2005) Cell 121: 703-712

  • DOI: 10.1016/j.cell.2005.03.023
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The 70S ribosome and its complement of factors required for initiation of translation in E. coli were purified separately and reassembled in vitro with GDPNP, producing a stable initiation complex (IC) stalled after 70S assembly. We have obtained a c ...

    The 70S ribosome and its complement of factors required for initiation of translation in E. coli were purified separately and reassembled in vitro with GDPNP, producing a stable initiation complex (IC) stalled after 70S assembly. We have obtained a cryo-EM reconstruction of the IC showing IF2*GDPNP at the intersubunit cleft of the 70S ribosome. IF2*GDPNP contacts the 30S and 50S subunits as well as fMet-tRNA(fMet). IF2 here adopts a conformation radically different from that seen in the recent crystal structure of IF2. The C-terminal domain of IF2 binds to the single-stranded portion of fMet-tRNA(fMet), thereby forcing the tRNA into a novel orientation at the P site. The GTP binding domain of IF2 binds to the GTPase-associated center of the 50S subunit in a manner similar to EF-G and EF-Tu. Additionally, we present evidence for the localization of IF1, IF3, one C-terminal domain of L7/L12, and the N-terminal domain of IF2 in the initiation complex.


    Organizational Affiliation

    Howard Hughes Medical Institute, Health Research, Inc. at the Wadsworth Center, Albany, New York 12201, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
translation initiation factor 2
I
501Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: infB (gicD, ssyG)
Find proteins for P0A705 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A705
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
translation Initiation Factor 1
W
71Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: infA
Find proteins for P69222 (Escherichia coli (strain K12))
Go to UniProtKB:  P69222
Entity ID: 1
MoleculeChainsLengthOrganism
P/I-site tRNAF76Escherichia coli
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 13.8 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