3GSS

HUMAN GLUTATHIONE S-TRANSFERASE P1-1 IN COMPLEX WITH ETHACRYNIC ACID-GLUTATHIONE CONJUGATE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

The three-dimensional structure of the human Pi class glutathione transferase P1-1 in complex with the inhibitor ethacrynic acid and its glutathione conjugate.

Oakley, A.J.Rossjohn, J.Lo Bello, M.Caccuri, A.M.Federici, G.Parker, M.W.

(1997) Biochemistry 36: 576-585

  • DOI: 10.1021/bi962316i
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The potent diuretic drug ethacrynic acid has been tested in clinical trials as an adjuvant in chemotherapy. Its target is the detoxifying enzyme glutathione transferase which is often found overexpressed in cancer tissues. We have solved the crystal ...

    The potent diuretic drug ethacrynic acid has been tested in clinical trials as an adjuvant in chemotherapy. Its target is the detoxifying enzyme glutathione transferase which is often found overexpressed in cancer tissues. We have solved the crystal structures of human pi class glutathione transferase P1-1 in complex with the inhibitor ethacrynic acid and its glutathione conjugate. Ethacrynic acid is found to bind in a nonproductive mode to one of the ligand binding sites of the enzyme (the H site) while the glutathione binding site (G site) is occupied by solvent molecules. There are no structural rearrangements of the G site in the absence of ligand. The structure indicates that bound glutathione is required for ethacrynic acid to dock into the H site in a productive binding mode. The binding of the ethacrynic acid-glutathione conjugate shows that the contacts of the glutathione moiety with the protein are identical to those observed in crystal structures of the enzyme with other glutathione-based substrates and inhibitors. The ethacrynic acid moiety of the conjugate binds in the H site in a fashion that has not been observed in crystal structures of other glutathione-based inhibitor complexes. The crystal structures implicate Tyr 108 as an electrophilic participant in the Michael addition of glutathione to ethacrynic acid.


    Related Citations: 
    • Three-Dimensional Structure of Class Pi Glutathione S-Transferase from Human Placenta in Complex with S-Hexylglutathione at 2.8 A Resolution
      Reinemer, P.,Dirr, H.W.,Ladenstein, R.,Huber, R.,Lo Bello, M.,Federici, G.,Parker, M.W.
      (1992) J.Mol.Biol. 227: 214


    Organizational Affiliation

    Ian Porter Foundation Protein Crystallography Laboratory, St. Vincent's Institute of Medical Research, Fitzroy, Victoria, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GLUTATHIONE S-TRANSFERASE P1-1
A, B
209Homo sapiensMutation(s): 0 
Gene Names: GSTP1 (FAEES3, GST3)
EC: 2.5.1.18
Find proteins for P09211 (Homo sapiens)
Go to Gene View: GSTP1
Go to UniProtKB:  P09211
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GSH
Query on GSH

Download SDF File 
Download CCD File 
A, B
GLUTATHIONE
C10 H17 N3 O6 S
RWSXRVCMGQZWBV-WDSKDSINSA-N
 Ligand Interaction
EAA
Query on EAA

Download SDF File 
Download CCD File 
A, B
ETHACRYNIC ACID
C13 H12 Cl2 O4
AVOLMBLBETYQHX-UHFFFAOYSA-N
 Ligand Interaction
MES
Query on MES

Download SDF File 
Download CCD File 
A, B
2-(N-MORPHOLINO)-ETHANESULFONIC ACID
C6 H13 N O4 S
SXGZJKUKBWWHRA-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.206 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 77.657α = 90.00
b = 89.347β = 97.44
c = 68.596γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
X-PLORrefinement
SCALEPACKdata scaling
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-11-12
    Type: Initial release
  • Version 1.1: 2008-03-03
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2011-12-14
    Type: Non-polymer description