1QE0

CRYSTAL STRUCTURE OF APO S. AUREUS HISTIDYL-TRNA SYNTHETASE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.197 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Cooperative structural dynamics and a novel fidelity mechanism in histidyl-tRNA synthetases.

Qiu, X.Janson, C.A.Blackburn, M.N.Chhohan, I.K.Hibbs, M.Abdel-Meguid, S.S.

(1999) Biochemistry 38: 12296-12304


  • PubMed Abstract: 
  • The crystal structure of the Staphylococcus aureus histidyl-tRNA synthetase apoprotein has been determined at 2.7 A resolution. Several important loops in the active site either become disordered or adopt very different conformations compared to thei ...

    The crystal structure of the Staphylococcus aureus histidyl-tRNA synthetase apoprotein has been determined at 2.7 A resolution. Several important loops in the active site either become disordered or adopt very different conformations compared to their ligand-bound states. These include the histidine A motif (Arg257-Tyr262) that is essential for substrate recognition, a loop (Gly52-Lys62) that seems to control the communication between the histidine and ATP binding sites, the motif 2 loop (Glu114-Arg120) that binds ATP, and the insertion domain that is likely to bind tRNA. These ligand-induced structural changes are supported by fluorescence experiments, which also suggest highly cooperative dynamics. A dynamic and cooperative active site is most likely necessary for the proper functioning of the histidyl-tRNA synthetase, and suggests a novel mechanism for improving charging fidelity.


    Organizational Affiliation

    Department of Structural Biology, Department of Protein Biochemistry, SmithKline Beecham Pharmaceuticals, King of Prussia, Pennsylvania 19406, USA. xiayang_qiu-1@sbphrd.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Histidine--tRNA ligase
A, B
420Staphylococcus aureusGene Names: hisS
EC: 6.1.1.21
Find proteins for P60911 (Staphylococcus aureus)
Go to UniProtKB:  P60911
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.197 
  • Space Group: P 65
Unit Cell:
Length (Å)Angle (°)
a = 125.650α = 90.00
b = 125.650β = 90.00
c = 115.990γ = 120.00
Software Package:
Software NamePurpose
SMARTdata collection
AMoREphasing
SAINTdata reduction
SMARTdata reduction
SAINTdata scaling
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-07-12
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-06-28
    Type: Database references, Source and taxonomy, Structure summary