1HTT

HISTIDYL-TRNA SYNTHETASE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.327 
  • R-Value Work: 0.246 
  • R-Value Observed: 0.246 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal structure of histidyl-tRNA synthetase from Escherichia coli complexed with histidyl-adenylate.

Arnez, J.G.Harris, D.C.Mitschler, A.Rees, B.Francklyn, C.S.Moras, D.

(1995) EMBO J 14: 4143-4155

  • Primary Citation of Related Structures:  
    1HTT

  • PubMed Abstract: 
  • The crystal structure at 2.6 A of the histidyl-tRNA synthetase from Escherichia coli complexed with histidyl-adenylate has been determined. The enzyme is a homodimer with a molecular weight of 94 kDa and belongs to the class II of aminoacyl-tRNA synthetases (aaRS) ...

    The crystal structure at 2.6 A of the histidyl-tRNA synthetase from Escherichia coli complexed with histidyl-adenylate has been determined. The enzyme is a homodimer with a molecular weight of 94 kDa and belongs to the class II of aminoacyl-tRNA synthetases (aaRS). The asymmetric unit is composed of two homodimers. Each monomer consists of two domains. The N-terminal catalytic core domain contains a six-stranded antiparallel beta-sheet sitting on two alpha-helices, which can be superposed with the catalytic domains of yeast AspRS, and GlyRS and SerRS from Thermus thermophilus with a root-mean-square difference on the C alpha atoms of 1.7-1.9 A. The active sites of all four monomers are occupied by histidyl-adenylate, which apparently forms during crystallization. The 100 residue C-terminal alpha/beta domain resembles half of a beta-barrel, and provides an independent domain oriented to contact the anticodon stem and part of the anticodon loop of tRNA(His). The modular domain organization of histidyl-tRNA synthetase reiterates a repeated theme in aaRS, and its structure should provide insight into the ability of certain aaRS to aminoacylate minihelices and other non-tRNA molecules.


    Related Citations: 
    • Crystallization of Histidyl-tRNA Synthetase from Escherichia Coli
      Francklyn, C., Harris, D., Moras, D.
      (1994) J Mol Biol 241: 275
    • Primary Structure of Histidine-tRNA Synthetase and Characterization of Hiss Transcripts
      Freedman, R., Gibson, B., Donovan, D., Biemann, K., Eisenbeis, S., Parker, J., Schimmel, P.
      (1985) J Biol Chem 260: 10063

    Organizational Affiliation

    INSERM/ULP BP 163, Illkirch, France.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HISTIDYL-TRNA SYNTHETASEA, B, C, D423Escherichia coliMutation(s): 0 
EC: 6.1.1.21
UniProt
Find proteins for P60906 (Escherichia coli (strain K12))
Explore P60906 
Go to UniProtKB:  P60906
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.327 
  • R-Value Work: 0.246 
  • R-Value Observed: 0.246 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 61.4α = 115
b = 110.7β = 97.4
c = 108.7γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
MARXDSdata reduction
AGROVATAdata scaling
X-PLORphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1997-01-27
    Type: Initial release
  • Version 1.1: 2008-03-07
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance