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Related Experiment Videos

Trypanosomal dUTPases as potential targets for drug design.

F Hidalgo-Zarco1, D González-Pazanowska

  • 1Instituto de Parasitologia y Biomedicina López-Neyra, C/Ventanilla 11, 18001-Granada, Spain.

Current Protein & Peptide Science
|October 11, 2002
PubMed
Summary

New drug targets for trypanosomatid diseases may exist. Researchers identified novel deoxyuridine triphosphate nucleotidohydrolase (dUTPase) enzymes in Leishmania and Trypanosoma cruzi, distinct from known human enzymes, offering potential for specific drug development.

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Kinetic properties and inhibition of the dimeric dUTPase-dUDPase from Leishmania major.

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New crystal forms of Trypanosoma cruzi dUTPase.

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Properties of Leishmania major dUTP nucleotidohydrolase, a distinct nucleotide-hydrolysing enzyme in kinetoplastids.

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Area of Science:

  • Biochemistry
  • Parasitology
  • Drug Discovery

Background:

  • Trypanosomatid parasites cause widespread diseases, necessitating new drug treatments.
  • Drug discovery often involves targeting unique biochemical pathways.
  • Deoxyuridine triphosphate nucleotidohydrolase (dUTPase) is crucial for DNA synthesis and a potential drug target.

Purpose of the Study:

  • To identify and characterize novel dUTPase enzymes in Leishmania major and Trypanosoma cruzi.
  • To investigate the biochemical and kinetic properties of these enzymes.
  • To assess their potential as drug targets for treating trypanosomatid infections.

Main Methods:

  • Genetic complementation in Escherichia coli mutants.
  • Sequence analysis and motif identification.

Related Experiment Videos

  • Enzyme kinetics studies and substrate specificity assays.
  • Investigating enzyme essentiality and regulation in Leishmania.

    • Main Results:

    • Novel dUTPase genes were isolated from L. major and T. cruzi.
    • These enzymes showed no significant similarity to known eukaryotic dUTPases but shared limited motifs with T phage and Campylobacter jejuni enzymes.
    • The identified dUTPases specifically hydrolyzed dUTP and dUDP, and were essential for Leishmania viability.
    • Enzyme activity was upregulated by inhibitors of dTMP synthesis.

    Conclusions:

    • A new family of dUTPases may exist in trypanosomatids, lacking sequence and structural similarity to known eukaryotic counterparts.
    • These novel enzymes represent promising drug targets for developing specific inhibitors against debilitating parasitic diseases.