Biological Assembly 1  

 3D View: Structure | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 87695.95 
• Atom Count: 5883 
• Residue Count: 627 
• Unique protein chains: 1
• Unique nucleic acid chains: 1

1GTR

STRUCTURAL BASIS OF ANTICODON LOOP RECOGNITION BY GLUTAMINYL-TRNA SYNTHETASE

• DOI: 10.2210/pdb1GTR/pdb
• NDB: PTR003

• Classification: COMPLEX (LIGASE/TRNA)
• Organism(s): Escherichia coli (strain K12)


• Deposited: 1993-09-15 Released: 1995-02-07 
• Deposition Author(s): Rould, M.A., Perona, J.J., Steitz, T.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.5 Å
• R-Value Work: 0.210 

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

• PubMed: 1857417 
• DOI: 10.1038/352213a0


• 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 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.

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Organizational Affiliation: 

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

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
GLUTAMINYL-tRNA SYNTHETASE	A	553	Escherichia coli (strain K12)	Gene Names: glnS EC: 6.1.1.18
Find proteins for P00962 (Escherichia coli (strain K12)) Go to UniProtKB:  P00962

Entity ID: 1
Molecule	Chains	Length	Organism
RNA (74-MER)	B	74	N/A

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
ATP	A	ADENOSINE-5'-TRIPHOSPHATE C10 H16 N5 O13 P3 ZKHQWZAMYRWXGA-KQYNXXCUSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.5 Å
• R-Value Work: 0.210 
• Space Group: C 2 2 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 242.800	α = 90.00
b = 94.300	β = 90.00
c = 115.800	γ = 90.00

Software Package:

Software Name	Purpose
X-PLOR	phasing
X-PLOR	refinement
X-PLOR	model building

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1993-09-15 
• Released Date: 1995-02-07 
• Deposition Author(s): Rould, M.A., Perona, J.J., Steitz, T.A.

Revision History 

• Version 1.0: 1995-02-07
  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