1A0F

CRYSTAL STRUCTURE OF GLUTATHIONE S-TRANSFERASE FROM ESCHERICHIA COLI COMPLEXED WITH GLUTATHIONESULFONIC ACID


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.183 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Three-dimensional structure of Escherichia coli glutathione S-transferase complexed with glutathione sulfonate: catalytic roles of Cys10 and His106.

Nishida, M.Harada, S.Noguchi, S.Satow, Y.Inoue, H.Takahashi, K.

(1998) J.Mol.Biol. 281: 135-147

  • DOI: 10.1006/jmbi.1998.1927

  • PubMed Abstract: 
  • Cytosolic glutathione S-transferase is a family of multi-functional enzymes involved in the detoxification of a large variety of xenobiotic and endobiotic compounds through glutathione conjugation. The three-dimensional structure of Escherichia coli ...

    Cytosolic glutathione S-transferase is a family of multi-functional enzymes involved in the detoxification of a large variety of xenobiotic and endobiotic compounds through glutathione conjugation. The three-dimensional structure of Escherichia coli glutathione S-transferase complexed with glutathione sulfonate, N-(N-L-gamma-glutamyl-3-sulfo-L-alanyl)-glycine, has been determined by the multiple isomorphous replacement method and refined to a crystallographic R factor of 0.183 at 2.1 A resolution. The E. coli enzyme is a globular homodimer with dimensions of 58 Ax56 Ax52 A. Each subunit, consisting of a polypeptide of 201 amino acid residues, is divided into a smaller N-terminal domain (residues 1 to 80) and a larger C-terminal one (residues 89 to 201). The core of the N-terminal domain is constructed by a four-stranded beta-sheet and two alpha-helices, and that of the C-terminal one is constructed by a right-handed bundle of four alpha-helices. Glutathione sulfonate, a competitive inhibitor against glutathione, is bound in a cleft between the N and C-terminal domains. Therefore, the E. coli enzyme conserves overall constructions common to the eukaryotic enzymes, in its polypeptide fold, dimeric assembly, and glutathione-binding site. In the case of the eukaryotic enzymes, tyrosine and serine residues near the N terminus are located in the proximity of the sulfur atom of the bound glutathione, and are proposed to be catalytically essential. In the E. coli enzyme, Tyr5 and Ser11 corresponding to these residues are not involved in the interaction with the inhibitor, although they are located in the vicinity of catalytic site. Instead, Cys10 N and His106 Nepsilon2 atoms are hydrogen-bonded to the sulfonate group of the inhibitor. On the basis of this structural study, Cys10 and His106 are ascribed to the catalytic residues that are distinctive from the family of the eukaryotic enzymes. We propose that glutathione S-transferases have diverged from a common origin and acquired different catalytic apparatuses in the process of evolution.


    Organizational Affiliation

    Graduate School of Pharmaceutical Sciences, University of Tokyo, Hongo 7-3-1, Tokyo, Bunkyo-ku, 113-0033, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GLUTATHIONE S-TRANSFERASE
A, B
201Escherichia coli (strain K12)Gene Names: gstA (gst)
EC: 2.5.1.18
Find proteins for P0A9D2 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A9D2
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GTS
Query on GTS

Download SDF File 
Download CCD File 
A, B
GLUTATHIONE SULFONIC ACID
C10 H17 N3 O9 S
QGWRMTHFAZVWAM-WDSKDSINSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.183 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 90.650α = 90.00
b = 95.390β = 90.00
c = 51.210γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
DENZOdata reduction
X-PLORmodel building
X-PLORphasing
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-01-13
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance