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Related Experiment Videos

Tubulin expression in trypanosomes.

J M Gallo1, E Precigout

  • 1Laboratoire de Biologie Cellulaire, URA CNRS 80, UFR Sciences, Poitiers, France.

Biology of the Cell
|January 1, 1988
PubMed
Summary
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Microtubules in trypanosomes, composed of alpha- and beta-tubulin, form essential structures like the flagellar axoneme and subpellicular corset. Specific tubulin forms and post-translational modifications likely regulate these structures, influencing parasite morphology and cell division.

Area of Science:

  • Cell Biology
  • Parasitology
  • Molecular Biology

Background:

  • Microtubules are critical for trypanosome morphology, forming the flagellar axoneme and subpellicular microtubule corset.
  • Tubulin, the protein subunit of microtubules, exists as alpha- and beta-tubulin dimers.
  • In Trypanosoma brucei, tubulin genes are tandemly repeated and transcribed into a single RNA precursor.

Purpose of the Study:

  • To investigate the structural organization and potential functional roles of specific tubulin forms in trypanosomes.
  • To explore the post-translational modifications of tubulin and their impact on microtubule dynamics.
  • To understand the involvement of specific tubulin domains in the subpellicular microtubule quartet (SFMQ) and trypanosome morphogenesis.

Main Methods:

  • Analysis of tubulin gene organization and transcription in Trypanosoma brucei.

Related Experiment Videos

  • Characterization of tubulin post-translational modifications, including C-terminal tyrosine cleavage/readdition and acetylation.
  • Use of monoclonal antibodies (e.g., 1B41, 24E3) to identify and localize specific tubulin domains within the cytoskeleton.

    • Main Results:

    • Tubulin genes in T. brucei are clustered and transcribed as a single precursor RNA.
    • Tubulin undergoes post-translational modifications: C-terminal tyrosine modification and acetylation.
    • Specific beta-tubulin forms are localized to distinct cytoskeletal domains, such as the flagellar adhesion zone and SFMQ.

    Conclusions:

    • Specific tubulin forms and their post-translational modifications are likely key regulators of microtubule dynamics in trypanosomes.
    • The subpellicular microtubule quartet (SFMQ) and its associated tubulin domains may play crucial roles in cell division and morphogenesis.
    • Further research into these specific tubulin forms could reveal novel targets for antiparasitic therapies.