3TL4

Crystal Structure of the tRNA Binding Domain of Glutaminyl-tRNA Synthetase from Saccharomyces cerevisiae


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.182 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural conservation of an ancient tRNA sensor in eukaryotic glutaminyl-tRNA synthetase.

Grant, T.D.Snell, E.H.Luft, J.R.Quartley, E.Corretore, S.Wolfley, J.R.Snell, M.E.Hadd, A.Perona, J.J.Phizicky, E.M.Grayhack, E.J.

(2012) Nucleic Acids Res. 40: 3723-3731

  • DOI: 10.1093/nar/gkr1223

  • PubMed Abstract: 
  • In all organisms, aminoacyl tRNA synthetases covalently attach amino acids to their cognate tRNAs. Many eukaryotic tRNA synthetases have acquired appended domains, whose origin, structure and function are poorly understood. The N-terminal appended do ...

    In all organisms, aminoacyl tRNA synthetases covalently attach amino acids to their cognate tRNAs. Many eukaryotic tRNA synthetases have acquired appended domains, whose origin, structure and function are poorly understood. The N-terminal appended domain (NTD) of glutaminyl-tRNA synthetase (GlnRS) is intriguing since GlnRS is primarily a eukaryotic enzyme, whereas in other kingdoms Gln-tRNA(Gln) is primarily synthesized by first forming Glu-tRNA(Gln), followed by conversion to Gln-tRNA(Gln) by a tRNA-dependent amidotransferase. We report a functional and structural analysis of the NTD of Saccharomyces cerevisiae GlnRS, Gln4. Yeast mutants lacking the NTD exhibit growth defects, and Gln4 lacking the NTD has reduced complementarity for tRNA(Gln) and glutamine. The 187-amino acid Gln4 NTD, crystallized and solved at 2.3 Å resolution, consists of two subdomains, each exhibiting an extraordinary structural resemblance to adjacent tRNA specificity-determining domains in the GatB subunit of the GatCAB amidotransferase, which forms Gln-tRNA(Gln). These subdomains are connected by an apparent hinge comprised of conserved residues. Mutation of these amino acids produces Gln4 variants with reduced affinity for tRNA(Gln), consistent with a hinge-closing mechanism proposed for GatB recognition of tRNA. Our results suggest a possible origin and function of the NTD that would link the phylogenetically diverse mechanisms of Gln-tRNA(Gln) synthesis.


    Organizational Affiliation

    Hauptman-Woodward Medical Research Institute, Buffalo, NY 14203, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Glutaminyl-tRNA synthetase
X
187Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: GLN4
EC: 6.1.1.18
Find proteins for P13188 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P13188
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
X
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.182 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 40.800α = 90.00
b = 34.620β = 97.61
c = 74.269γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
PDB_EXTRACTdata extraction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-11-30
    Type: Initial release
  • Version 1.1: 2011-12-28
    Type: Database references
  • Version 1.2: 2012-06-13
    Type: Database references