1GSG

Structure of E.coli glutaminyl-tRNA synthetase complexed with trnagln and ATP at 2.8 Angstroms resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Work: 0.279 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

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: 1135-1142


  • PubMed Abstract: 
  • The crystal structure of Escherichia coli glutaminyl-tRNA synthetase (GlnRS) complexed with its cognate glutaminyl transfer RNA (tRNA(Gln] and adenosine triphosphate (ATP) has been derived from a 2.8 angstrom resolution electron density map and the k ...

    The crystal structure of Escherichia coli glutaminyl-tRNA synthetase (GlnRS) complexed with its cognate glutaminyl transfer RNA (tRNA(Gln] and adenosine triphosphate (ATP) has been derived from a 2.8 angstrom resolution electron density map and the known protein and tRNA sequences. The 63.4-kilodalton monomeric enzyme consists of four domains arranged to give an elongated molecule with an axial ratio greater than 3 to 1. Its interactions with the tRNA extend from the anticodon to the acceptor stem along the entire inside of the L of the tRNA. The complexed tRNA retains the overall conformation of the yeast phenylalanine tRNA (tRNA(Phe] with two major differences: the 3' acceptor strand of tRNA(Gln) makes a hairpin turn toward the inside of the L, with the disruption of the final base pair of the acceptor stem, and the anticodon loop adopts a conformation not seen in any of the previously determined tRNA structures. Specific recognition elements identified so far include (i) enzyme contacts with the 2-amino groups of guanine via the tRNA minor groove in the acceptor stem at G2 and G3; (ii) interactions between the enzyme and the anticodon nucleotides; and (iii) the ability of the nucleotides G73 and U1.A72 of the cognate tRNA to assume a conformation stabilized by the protein at a lower free energy cost than noncognate sequences. The central domain of this synthetase binds ATP, glutamine, and the acceptor end of the tRNA as well as making specific interactions with the acceptor stem.2+t is


    Related Citations: 
    • Overproduction and Purification of Escherichia Coli tRNA(2Gln) and its Use in Crystallization of the Glutaminyl-tRNA Synthetase-tRNA(Gln) Complex
      Perona, J.J.,Swanson, R.,Steitz, T.A.,Soell, D.
      (1988) J.Mol.Biol. 202: 121
    • Structural Basis for Misaminoacylation by Mutant E. Coli Glutaminyl-tRNA Synthetase Enzymes
      Perona, J.J.,Swanson, R.N.,Rould, M.A.,Steitz, T.A.,Soell, D.
      (1989) Science 246: 1152


    Organizational Affiliation

    Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06511.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
GLUTAMINYL-TRNA SYNTHETASE
P
553Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: glnS
EC: 6.1.1.18
Find proteins for P00962 (Escherichia coli (strain K12))
Go to UniProtKB:  P00962
Entity ID: 1
MoleculeChainsLengthOrganism
TRNAGLNT75N/A
Small Molecules
Modified Residues  7 Unique
IDChainsTypeFormula2D DiagramParent
PSU
Query on PSU
T
RNA LINKINGC9 H13 N2 O9 PU
OMU
Query on OMU
T
RNA LINKINGC10 H15 N2 O9 PU
4SU
Query on 4SU
T
RNA LINKINGC9 H13 N2 O8 P SU
OMG
Query on OMG
T
RNA LINKINGC11 H16 N5 O8 PG
5MU
Query on 5MU
T
RNA LINKINGC10 H15 N2 O9 PU
2MA
Query on 2MA
T
RNA LINKINGC11 H16 N5 O7 PA
H2U
Query on H2U
T
RNA LINKINGC9 H15 N2 O9 PU
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Work: 0.279 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 242.800α = 90.00
b = 93.600β = 90.00
c = 115.700γ = 90.00
Software Package:
Software NamePurpose
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1992-02-24
    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: 2011-12-07
    Type: Other
  • Version 1.4: 2012-05-09
    Type: Other