1QRT

GLUTAMINYL-TRNA SYNTHETASE MUTANT D235G COMPLEXED WITH GLUTAMINE TRANSFER RNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Work: 0.216 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal structures of three misacylating mutants of Escherichia coli glutaminyl-tRNA synthetase complexed with tRNA(Gln) and ATP.

Arnez, J.G.Steitz, T.A.

(1996) Biochemistry 35: 14725-14733

  • DOI: 10.1021/bi961532o
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Three previously described mutant Escherichia coli glutaminyl-tRNA synthetase (GlnRS) proteins that incorrectly aminoacylate the amber suppressor derived from tRNATyr (supF) with glutamine were cocrystallized with wild-type tRNAGln and their structur ...

    Three previously described mutant Escherichia coli glutaminyl-tRNA synthetase (GlnRS) proteins that incorrectly aminoacylate the amber suppressor derived from tRNATyr (supF) with glutamine were cocrystallized with wild-type tRNAGln and their structures determined. In two of the mutant enzymes studied, Asp235, which contacts base pair G3-C70 in the acceptor stem, has been changed to asparagine in GlnRS7 and to glycine in GlnRS10. These mutations result in changed interactions between Asn235 of GlnRS7 and G3-C70 of the tRNA and an altered water structure between Gly235 of GlnRS10 and base pair G3-C70. These structures suggest how the mutant enzymes can show only small changes in their ability to aminoacylate wild-type cognate tRNA on the one hand and yet show a lack of discrimination against a noncognate U3-A70 base pair on the other. In contrast, the change of Ile129 to Thr in GlnRS15 causes virtually no change in the structure of the complex, and the explanation for its ability to misacylate supF is unclear.


    Related Citations: 
    • Structure of E. Coli Glutaminyl-tRNA Synthetase Complexed with tRNA(Gln) and ATP at 2.8 A Resolution
      Rould, M.A.,Perona, J.J.,Soll, D.,Steitz, T.A.
      (1989) Science 246: 1135
    • Transfer RNA Mischarging Mediated by a Mutant Escherichia Coli Glutaminyl-tRNA Synthetase
      Inokuchi, H.,Hoben, P.,Yamao, F.,Ozeki, H.,Soll, D.
      (1984) Proc.Natl.Acad.Sci.USA 81: 5076
    • Structural Basis of Anticodon Loop Recognition by Glutaminyl-tRNA Synthetase
      Rould, M.A.,Perona, J.J.,Steitz, T.A.
      (1991) Nature 352: 213
    • Structural Basis for Misaminoacylation by Mutant E. Coli Glutaminyl-tRNA Synthetase Enzymes
      Perona, J.J.,Swanson, R.N.,Rould, M.A.,Steitz, T.A.,Soll, D.
      (1989) Science 246: 1152


    Organizational Affiliation

    Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut 06520-8114, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (GLUTAMINYL-TRNA SYNTHETASE (E.C.6.1.1.18))
A
553Escherichia coli (strain K12)Mutation(s): 1 
Gene Names: glnS
EC: 6.1.1.18
Find proteins for P00962 (Escherichia coli (strain K12))
Go to UniProtKB:  P00962
Entity ID: 1
MoleculeChainsLengthOrganism
TRNAGLN2B75Escherichia coli
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ATP
Query on ATP

Download SDF File 
Download CCD File 
A
ADENOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O13 P3
ZKHQWZAMYRWXGA-KQYNXXCUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Work: 0.216 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 243.500α = 90.00
b = 93.700β = 90.00
c = 115.900γ = 90.00
Software Package:
Software NamePurpose
SDMSdata reduction
SDMSdata collection
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1996-12-07
    Type: Initial release
  • Version 1.1: 2008-05-22
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2011-11-16
    Type: Atomic model