11GS

Glutathione s-transferase complexed with ethacrynic acid-glutathione conjugate (form ii)

• PDB DOI: https://doi.org/10.2210/pdb11GS/pdb

• Classification: TRANSFERASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1997-11-03 Released: 1999-01-13 
• Deposition Author(s): Oakley, A.J., Lo Bello, M., Mazzetti, A.P., Federici, G., Parker, M.W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.270 
• R-Value Work: 0.214 
• R-Value Observed: 0.214 

Starting Model: experimental

Literature

The glutathione conjugate of ethacrynic acid can bind to human pi class glutathione transferase P1-1 in two different modes.

Oakley, A.J., Lo Bello, M., Mazzetti, A.P., Federici, G., Parker, M.W.

(1997) FEBS Lett 419: 32-36

• PubMed: 9426214 
• DOI: https://doi.org/10.1016/s0014-5793(97)01424-5
• Primary Citation of Related Structures:  
  11GS


• PubMed Abstract: 
  

  The diuretic drug ethacrynic acid, an inhibitor of pi class glutathione S-transferase, has been tested in clinical trials as an adjuvant in chemotherapy. We recently solved the crystal structure of this enzyme in complex with ethacrynic acid and its glutathione conjugate. Here we present a new structure of the ethacrynic-glutathione conjugate complex. In this structure the ethacrynic moiety of the complex is shown to bind in a completely different orientation to that previously observed. Thus there are at least two binding modes possible, an observation of great importance to the design of second generation inhibitors of the enzyme.

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Organizational Affiliation: 

The Ian Potter Foundation Protein Crystallography Laboratory, St. Vincent's Institute of Medical Research, Fitzroy, Vic., Australia.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 48.37 kDa 
• Atom Count: 3,538 
• Modelled Residue Count: 416 
• Deposited Residue Count: 420 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
GLUTATHIONE S-TRANSFERASE	A, B	210	Homo sapiens	Mutation(s): 0  Gene Names: GSTP1 EC: 2.5.1.18
UniProt & NIH Common Fund Data Resources
Find proteins for P09211 (Homo sapiens) Explore P09211  Go to UniProtKB:  P09211
PHAROS:  P09211 GTEx:  ENSG00000084207

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GSH	C [auth A], F [auth B]	GLUTATHIONE C10 H17 N3 O6 S RWSXRVCMGQZWBV-WDSKDSINSA-N
EAA	D [auth A], G [auth B]	ETHACRYNIC ACID C13 H12 Cl2 O4 AVOLMBLBETYQHX-UHFFFAOYSA-N
MES	E [auth A], H [auth B]	2-(N-MORPHOLINO)-ETHANESULFONIC ACID C6 H13 N O4 S SXGZJKUKBWWHRA-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
EAA	BindingDB:  11GS	IC50: min: 3400, max: 2.60e+4 (nM) from 3 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.270 
• R-Value Work: 0.214 
• R-Value Observed: 0.214 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 77.78	α = 90
b = 89.56	β = 97.62
c = 68.65	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
DENZO	data reduction
SCALEPACK	data scaling
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1999-01-13 
Deposition Author(s): Oakley, A.J., Lo Bello, M., Mazzetti, A.P., Federici, G., Parker, M.W.

Revision History  

• Version 1.0: 1999-01-13
  Type: Initial release
  
• Version 1.1: 2008-03-03
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2023-08-02
  Changes: Database references, Derived calculations, Other, Refinement description
• Version 1.4: 2024-05-22
  Changes: Data collection