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Jupiter, a new Drosophila protein associated with microtubules

Nina Karpova1, Yves Bobinnec, Sylvaine Fouix

  • 1Laboratoire du Biologie du Développement, UMR7009 CNRS UPMC, Observatoire Océanologique, Villefranche-sur-mer, France. nina.karpova@gmail.com

Cell Motility and the Cytoskeleton
|March 7, 2006
PubMed

Insights

Researchers identified Jupiter, a novel protein in Drosophila, that binds to microtubules. This protein, when fused with GFP, serves as an excellent marker for observing microtubule dynamics in living organisms and cell lines.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Genetics

Background:

  • Microtubules are essential cytoskeletal components involved in various cellular processes.
  • Microtubule-associated proteins (MAPs) regulate microtubule stability and dynamics.
  • Existing MAPs have limitations in real-time in vivo visualization.

Purpose of the Study:

  • To characterize a novel Drosophila protein, Jupiter, with MAP-like properties.
  • To develop Jupiter as a reliable marker for visualizing microtubule dynamics in vivo.
  • To establish cell lines for studying microtubule behavior.

Main Methods:

  • Generated a transgenic Drosophila strain using the "protein-trap" technique to create Jupiter:GFP fusion proteins.
  • Utilized microscopy to observe Jupiter:GFP localization and microtubule dynamics in vivo.
  • Established permanent cell lines from Jupiter:GFP embryos for further analysis.
  • Observed cellular responses to microtubule-disrupting drugs (colchicine and taxol).

Main Results:

  • Jupiter protein associates with microtubules in vitro and in vivo.
  • Jupiter:GFP fusion protein effectively labels the microtubule network throughout the cell cycle and development.
  • High concentrations of Jupiter:GFP were observed in early embryos, larval nervous system, eye photoreceptor precursors, and adult ovaries.
  • Established cell lines exhibit stable, fluorescent microtubules and accurately reflect drug-induced microtubule alterations.

Conclusions:

  • Jupiter is a novel, soluble protein with characteristics of structural microtubule-associated proteins.
  • Jupiter:GFP is a valuable tool for real-time in vivo visualization of microtubule dynamics.
  • The developed Jupiter cell lines and transgenic fly strain offer significant potential for microtubule research.

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