1K8B

NMR Structure Analysis of the N-terminal Domain of Archaeal Translation Initiation Factor 2 Subunit beta


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 170 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of the beta subunit of translation initiation factor 2 from the archaeon Methanococcus jannaschii: a representative of the eIF2beta/eIF5 family of proteins.

Cho, S.Hoffman, D.W.

(2002) Biochemistry 41: 5730-5742

  • Primary Citation of Related Structures:  1K81

  • PubMed Abstract: 
  • The beta subunit of archaeal translation initiation factor 2 (aIF2beta) is a representative of a family of proteins whose members include the beta subunit of eukaryotic translation initiation factor 2 (eIF2beta) and the N-terminal domain within trans ...

    The beta subunit of archaeal translation initiation factor 2 (aIF2beta) is a representative of a family of proteins whose members include the beta subunit of eukaryotic translation initiation factor 2 (eIF2beta) and the N-terminal domain within translation initiation factor 5 (eIF5); no members of this family of proteins have been structurally characterized up to this time. In the work presented here, aIF2beta from Methanococcus jannaschii was expressed in Escherichia coli, purified, and analyzed using multidimensional NMR methods. The aIF2beta was found to contain two independent structural domains. The N-terminal domain contains a four-stranded antiparallel beta sheet and two alpha helices, and is structurally similar to the DNA-binding domain of a yeast heat shock transcription factor and a domain within ribosomal protein S4. This structural similarity was an unanticipated result, since no significant homology was detected at the level of primary sequence. The C-terminal domain of aIF2beta contains a zinc-binding motif of three antiparallel beta strands, with four conserved cysteines arranged as two CXXC units separated by 17 residues. Conserved residues on the surface of each domain that are likely candidates for direct interaction with other components of the translational apparatus were identified. The significant primary sequence homology between archaeal aIF2beta and the eukaryotic eIF2beta and eIF5, when combined with the structural results in the work presented here, permitted structural features to be predicted for these latter two eukaryotic proteins.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, Texas 78712, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROBABLE TRANSLATION INITIATION FACTOR 2 BETA SUBUNIT
A
52Methanocaldococcus jannaschii (strain ATCC 43067 / DSM 2661 / JAL-1 / JCM 10045 / NBRC 100440)Gene Names: eif2b
Find proteins for Q57562 (Methanocaldococcus jannaschii (strain ATCC 43067 / DSM 2661 / JAL-1 / JCM 10045 / NBRC 100440))
Go to UniProtKB:  Q57562
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 170 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 1K8B Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2001-10-23 
  • Released Date: 2002-04-24 
  • Deposition Author(s): Cho, S., Hoffman, D.W.

Revision History 

  • Version 1.0: 2002-04-24
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance