1AH9

THE STRUCTURE OF THE TRANSLATIONAL INITIATION FACTOR IF1 FROM ESCHERICHIA COLI, NMR, 19 STRUCTURES


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 19 
  • Selection Criteria: LEAST RESTRAINT VIOLATIONS 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The structure of the translational initiation factor IF1 from E.coli contains an oligomer-binding motif.

Sette, M.van Tilborg, P.Spurio, R.Kaptein, R.Paci, M.Gualerzi, C.O.Boelens, R.

(1997) EMBO J. 16: 1436-1443

  • DOI: 10.1093/emboj/16.6.1436

  • PubMed Abstract: 
  • The structure of the translational initiation factor IF1 from Escherichia coli has been determined with multidimensional NMR spectroscopy. Using 1041 distance and 78 dihedral constraints, 40 distance geometry structures were calculated, which were re ...

    The structure of the translational initiation factor IF1 from Escherichia coli has been determined with multidimensional NMR spectroscopy. Using 1041 distance and 78 dihedral constraints, 40 distance geometry structures were calculated, which were refined by restrained molecular dynamics. From this set, 19 structures were selected, having low constraint energy and few constraint violations. The ensemble of 19 structures displays a root-mean-square deviation versus the average of 0.49 A for the backbone atoms and 1.12 A for all atoms for residues 6-36 and 46-67. The structure of IF1 is characterized by a five-stranded beta-barrel. The loop connecting strands three and four contains a short 3(10) helix but this region shows considerably higher flexibility than the beta-barrel. The fold of IF1 is very similar to that found in the bacterial cold shock proteins CspA and CspB, the N-terminal domain of aspartyl-tRNA synthetase and the staphylococcal nuclease, and can be identified as the oligomer-binding motif. Several proteins of this family are nucleic acid-binding proteins. This suggests that IF1 plays its role in the initiation of protein synthesis by nucleic acid interactions. Specific changes of NMR signals of IF1 upon titration with 30S ribosomal subunit identifies several residues that are involved in the interaction with ribosomes.


    Organizational Affiliation

    Bijvoet Center for Biomolecular Research, Utrecht University, The Netherlands.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
INITIATION FACTOR 1
A
71Escherichia coli (strain K12)Gene Names: infA
Find proteins for P69222 (Escherichia coli (strain K12))
Go to UniProtKB:  P69222
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 19 
  • Selection Criteria: LEAST RESTRAINT VIOLATIONS 
  • Olderado: 1AH9 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-07-07
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance