Structure of Onchocerca Volvulus Pi-class Glutathione S-transferase

Experimental Data Snapshot

  • Resolution: 1.50 Å
  • R-Value Free: 0.181 
  • R-Value Work: 0.150 
  • R-Value Observed: 0.152 

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Structure of the Major Cytosolic Glutathione S-Transferase from the Parasitic Nematode Onchocerca volvulus

Perbandt, M.Hoppner, J.Betzel, C.Walter, R.D.Liebau, E.

(2005) J Biol Chem 280: 12630-12636

  • DOI: https://doi.org/10.1074/jbc.M413551200
  • Primary Citation of Related Structures:  
    1TU7, 1TU8

  • PubMed Abstract: 

    Onchocerciasis is a debilitating parasitic disease caused by the filarial worm Onchocerca volvulus. Similar to other helminth parasites, O. volvulus is capable of evading the host's immune responses by a variety of defense mechanisms, including the detoxification activities of the glutathione S-transferases (GSTs). Additionally, in response to drug treatment, helminth GSTs are highly up-regulated, making them tempting targets both for chemotherapy and for vaccine development. We analyzed the three-dimensional x-ray structure of the major cytosolic GST from O. volvulus (Ov-GST2) in complex with its natural substrate glutathione and its competitive inhibitor S-hexylglutathione at 1.5 and 1.8 angstrom resolution, respectively. From the perspective of the biochemical classification, the Ov-GST2 seems to be related to pi-class GSTs. However, in comparison to other pi-class GSTs, in particular to the host's counterpart, the Ov-GST2 reveals significant and unusual differences in the sequence and overall structure. Major differences can be found in helix alpha-2, an important region for substrate recognition. Moreover, the binding site for the electrophilic co-substrate is spatially increased and more solvent-accessible. These structural alterations are responsible for different substrate specificities and will form the basis of parasite-specific structure-based drug design investigations.

  • Organizational Affiliation

    Institute of Biochemistry and Foodchemistry, Department of Biochemistry and Molecularbiology, University of Hamburg, Martin Luther King Platz 6, 20146 Hamburg, Germany. Perbandt@chemie.uni-hamburg.de

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Glutathione S-transferase 2
A, B
208Onchocerca volvulusMutation(s): 0 
Gene Names: GST2
Find proteins for P46427 (Onchocerca volvulus)
Explore P46427 
Go to UniProtKB:  P46427
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP46427
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.50 Å
  • R-Value Free: 0.181 
  • R-Value Work: 0.150 
  • R-Value Observed: 0.152 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.645α = 90
b = 82.33β = 95.89
c = 56.662γ = 90
Software Package:
Software NamePurpose

Structure Validation

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Entry History 

Deposition Data

  • Released Date: 2005-01-11 
  • Deposition Author(s): Perbandt, M.

Revision History  (Full details and data files)

  • Version 1.0: 2005-01-11
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 1.3: 2011-12-07
    Changes: Non-polymer description
  • Version 1.4: 2018-10-03
    Changes: Advisory, Data collection