1U88

Crystal Structure Of The 26 Kda Glutathione S-Transferase Y7F mutant From Schistosoma Japonicum Complexed With S-Octyl Glutathione

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.50 Å
  • R-Value Free: 0.317 
  • R-Value Work: 0.220 
  • R-Value Observed: 0.220 

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Literature

Crystallographic and Thermodynamic Analysis of the Binding of S-Octylglutathione to the Tyr 7 to Phe Mutant of Glutathione S-Transferase from Schistosoma japonicum(,)

Andujar-Sanchez, M., Smith, A.W., Clemente-Jimenez, J.M., Rodriguez-Vico, F., Las Heras-Vazquez, F.J., Jara-Perez, V., Camara-Artigas, A.

(2005) Biochemistry 44: 1174-1183

  • DOI: 10.1021/bi0483110
  • Primary Citation of Related Structures:  
    1U87, 1U88

  • PubMed Abstract: 

    • Glutathione S-transferases are a family of multifunctional enzymes involved in the metabolism of drugs and xenobiotics. Two tyrosine residues, Tyr 7 and Tyr 111, in the active site of the enzyme play an important role in the binding and catalysis of substrate ligands ...

    Glutathione S-transferases are a family of multifunctional enzymes involved in the metabolism of drugs and xenobiotics. Two tyrosine residues, Tyr 7 and Tyr 111, in the active site of the enzyme play an important role in the binding and catalysis of substrate ligands. The crystal structures of Schistosoma japonicum glutathione S-transferase tyrosine 7 to phenylalanine mutant [SjGST(Y7F)] in complex with the substrate glutathione (GSH) and the competitive inhibitor S-octylglutathione (S-octyl-GSH) have been obtained. These new structural data combined with fluorescence spectroscopy and thermodynamic data, obtained by means of isothermal titration calorimetry, allow for detailed characterization of the ligand-binding process. The binding of S-octyl-GSH to SjGST(Y7F) is enthalpically and entropically driven at temperatures below 30 degrees C. The stoichiometry of the binding is one molecule of S-octyl-GSH per mutant dimer, whereas shorter alkyl derivatives bind with a stoichiometry of two molecules per mutant dimer. The SjGST(Y7F).GSH structure showed no major structural differences compared to the wild-type enzyme. In contrast, the structure of SjGST(Y7F).S-octyl-GSH showed asymmetric binding of S-octyl-GSH. This lack of symmetry is reflected in the lower symmetry space group of the SjGST(Y7F).S-octyl-GSH crystals (P6(3)) compared to that of the SjGST(Y7F).GSH crystals (P6(3)22). Moreover, the binding of S-octyl-GSH to the A subunit is accompanied by conformational changes that may be responsible for the lack of binding to the B subunit.

    Organizational Affiliation: 

    Departamento Química Física, Bioquímica y Química Inorgánica, Universidad de Almería, España.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Glutathione S-transferase 26 kDaA, B218Schistosoma japonicumMutation(s): 1 
EC: 2.5.1.18
UniProt
Find proteins for P08515 (Schistosoma japonicum)
Explore P08515 
Go to UniProtKB:  P08515
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP08515
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GTY
Query on GTY
Download Ideal Coordinates CCD File 
C [auth A]L-GAMMA-GLUTAMYL-S-OCTYL-D-CYSTEINYLGLYCINE
C18 H33 N3 O6 S
MJWCZWAVSJZQNL-KBPBESRZSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.50 Å
  • R-Value Free: 0.317 
  • R-Value Work: 0.220 
  • R-Value Observed: 0.220 
  • Space Group: P 63
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 116.1α = 90
b = 116.1β = 90
c = 73.2γ = 120
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
CCP4data scaling
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-02-22
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2021-11-10
    Changes: Database references, Derived calculations