4PHC

Crystal Structure of a human cytosolic histidyl-tRNA synthetase, histidine-bound


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.844 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.201 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Comparison of histidine recognition in human and trypanosomatid histidyl-tRNA synthetases.

Koh, C.Y.Wetzel, A.B.de van der Schueren, W.J.Hol, W.G.

(2014) Biochimie 106: 111-120

  • DOI: 10.1016/j.biochi.2014.08.005

  • PubMed Abstract: 
  • As part of a project aimed at obtaining selective inhibitors and drug-like compounds targeting tRNA synthetases from trypanosomatids, we have elucidated the crystal structure of human cytosolic histidyl-tRNA synthetase (Hs-cHisRS) in complex with his ...

    As part of a project aimed at obtaining selective inhibitors and drug-like compounds targeting tRNA synthetases from trypanosomatids, we have elucidated the crystal structure of human cytosolic histidyl-tRNA synthetase (Hs-cHisRS) in complex with histidine in order to be able to compare human and parasite enzymes. The resultant structure of Hs-cHisRS•His represents the substrate-bound state (H-state) of the enzyme. It provides an interesting opportunity to compare with ligand-free and imidazole-bound structures Hs-cHisRS published recently, both of which represent the ligand-free state (F-state) of the enzyme. The H-state Hs-cHisRS undergoes conformational changes in active site residues and several conserved motif of HisRS, compared to F-state structures. The histidine forms eight hydrogen bonds with HisRS of which six engage the amino and carboxylate groups of this amino acid. The availability of published imidazole-bound structure provides a unique opportunity to dissect the structural roles of individual chemical groups of histidine. The analysis revealed the importance of the amino and carboxylate groups, of the histidine in leading to these dramatic conformational changes of the H-state. Further, comparison with previously published trypanosomatid HisRS structures reveals a pocket in the F-state of the parasite enzyme that may provide opportunities for developing specific inhibitors of Trypanosoma brucei HisRS.


    Organizational Affiliation

    Department of Biochemistry, University of Washington, Seattle, WA 98195, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Histidine--tRNA ligase, cytoplasmic
A, B, C, D
509Homo sapiensMutation(s): 0 
Gene Names: HARS (HRS)
EC: 6.1.1.21
Find proteins for P12081 (Homo sapiens)
Go to Gene View: HARS
Go to UniProtKB:  P12081
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
A, B, C
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
HIS
Query on HIS

Download SDF File 
Download CCD File 
A, B, C, D
HISTIDINE
C6 H10 N3 O2
HNDVDQJCIGZPNO-YFKPBYRVSA-O
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.844 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.201 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 89.087α = 90.00
b = 92.993β = 90.00
c = 261.083γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
XDSdata reduction
Aimlessdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious DiseasesUnited StatesRO1AI084004

Revision History 

  • Version 1.0: 2014-08-27
    Type: Initial release
  • Version 1.1: 2014-09-24
    Type: Database references
  • Version 1.2: 2015-06-03
    Type: Database references
  • Version 1.3: 2017-09-06
    Type: Author supporting evidence, Database references, Derived calculations, Other, Source and taxonomy
  • Version 1.4: 2017-11-22
    Type: Refinement description