1GTR

STRUCTURAL BASIS OF ANTICODON LOOP RECOGNITION BY GLUTAMINYL-TRNA SYNTHETASE

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Work: 0.210 
  • R-Value Observed: 0.210 

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This is version 1.3 of the entry. See complete history. 


Literature

Structural basis of anticodon loop recognition by glutaminyl-tRNA synthetase.

Rould, M.A., Perona, J.J., Steitz, T.A.

(1991) Nature 352: 213-218

  • DOI: 10.1038/352213a0
  • Primary Citation of Related Structures:  
    1GTR

  • PubMed Abstract: 

    • The refined crystal structure of Escherichia coli glutaminyl transfer RNA synthetase complexed with transfer RNA(Gln) and ATP reveals that the structure of the anticodon loop of the enzyme-bound tRNA(Gln) differs extensively from that of the known crystal structures of uncomplexed tRNA molecules ...

    The refined crystal structure of Escherichia coli glutaminyl transfer RNA synthetase complexed with transfer RNA(Gln) and ATP reveals that the structure of the anticodon loop of the enzyme-bound tRNA(Gln) differs extensively from that of the known crystal structures of uncomplexed tRNA molecules. The anticodon stem is extended by two non-Watson-Crick base pairs, leaving the three anti-codon bases unpaired and splayed out to bind snugly into three separate complementary pockets in the protein. These interactions suggest that the entire anticodon loop provides essential sites for glutaminyl tRNA synthetase discrimination among tRNA molecules.

    Organizational Affiliation: 

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



Macromolecules

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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
GLUTAMINYL-tRNA SYNTHETASEB [auth A]553Escherichia coliMutation(s): 0 
EC: 6.1.1.18
UniProt
Find proteins for P00962 (Escherichia coli (strain K12))
Explore P00962 
Go to UniProtKB:  P00962
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00962
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsLengthOrganismImage
RNA (74-MER)A [auth B]74N/A
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ATP
Query on ATP
Download Ideal Coordinates CCD File 
C [auth A]ADENOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O13 P3
ZKHQWZAMYRWXGA-KQYNXXCUSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Work: 0.210 
  • R-Value Observed: 0.210 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 242.8α = 90
b = 94.3β = 90
c = 115.8γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1995-02-07
    Type: Initial release
  • Version 1.1: 2008-05-22
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2011-11-16
    Changes: Atomic model