The crystal structure of Plasmodium falciparum glutamate dehydrogenase, a putative target for novel antimalarial drugs

Experimental Data Snapshot

  • Resolution: 2.70 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.249 
  • R-Value Observed: 0.249 

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The Crystal Structure of Plasmodium Falciparum Glutamate Dehydrogenase, a Putative Target for Novel Antimalarial Drugs

Werner, C.Stubbs, M.T.Krauth-Siege, R.L.Klebe, G.

(2005) J Mol Biol 349: 597

  • DOI: https://doi.org/10.1016/j.jmb.2005.03.077
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Plasmodium falciparum is the main causative agent of tropical malaria, the most severe parasitic disease in the world. Growing resistance of Plasmodia towards available drugs is an increasing problem in countries where malaria is endemic. As Plasmodia are sensitive to oxidative stress, augmenting this in the parasite represents a promising principle for the development of novel antimalarial drugs. The NADP-dependent glutamate dehydrogenase (GDH) of P.falciparum is largely responsible for the production of NADPH in the parasite, which in turn serves as electron source for the antioxidative enzymes glutathione reductase and thioredoxin reductase. As GDH does not occur in the host erythrocyte, GDH is a particularly attractive target for drug therapy. The three-dimensional structure of P.falciparum GDH in the unligated state has been determined by X-ray crystallography to a resolution of 2.7A. Compared to the mammalian enzymes, two amino acid residues are exchanged in the putative active site of the parasite GDH. The most obvious differences between parasite and human GDH are the subunit interfaces of the hexameric proteins. In the parasite protein, several salt-bridges mediate contacts between the subunits whereas in the human enzyme these interactions are mainly of hydrophobic nature. Furthermore, P.falciparum GDH possesses a unique N-terminal extension that does not occur in any other GDH sequence so far studied. These findings might be exploited for the design of peptidomimetics capable of disrupting the oligomeric organisation of the parasite enzyme.

  • Organizational Affiliation

    Institute of Pharmaceutical Chemistry, Philipps-University Marburg, Marbacher Weg 6, D-35037 Marburg, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D, E
A, B, C, D, E, F
470Plasmodium falciparumMutation(s): 0 
Find proteins for O96940 (Plasmodium falciparum)
Explore O96940 
Go to UniProtKB:  O96940
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO96940
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.70 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.249 
  • R-Value Observed: 0.249 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 167.612α = 90
b = 96.851β = 91.72
c = 196.192γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-05-19
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-12-13
    Changes: Data collection, Database references, Other, Refinement description