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Grenoble Institut des Neurosciences Grenoble Institut des Neurosciences

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Home > Research > Research teams > Cytoskeleton dynamics and structure (Isabelle ARNAL)

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Team "Cytoskeleton dynamics and structure"

Director: Isabelle ARNAL

Study the molecular mechanisms of microtubule regulation by cytoskeletal-associated proteins, using complementary approaches of biochemistry, optical video-microscopy and electron cryomicroscopy.
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The team "Cytoskeleton dynamics and structure" is known for its expertise in the analysis of the architecture of the cytoskeleton of the nanoscale to the three-dimensional molecular organization.

Research themes and techniques used

Microtubules are major components of the eukaryotic cytoskeleton and are involved in cell division, motility and morphogenesis. Important for these functions are the dynamic and structural properties of microtubules, which are finely regulated in vivo by numerous microtubule-associated proteins (MAPs).

Our team focuses on the molecular basis underlying microtubule regulation by MAPs that are specifically involved in cytoskeleton organisation in mitosis, neuronal differentiation and neuronal plasticity. For that, we use light microscopy imaging to study microtubule properties in both simple cell-free systems and cellular differentiation models. In parallel, we are using electron cryomicroscopy and cryotomography methods to investigate how the MAPs of interest precisely interact with microtubules and affect the structure and spatial arrangement of these polymers.

This correlative approach combining light- and electron microscopy on various complexity level systems should help to understand at a molecular level how a MAP network elaborate complex cytoskeleton architecture in cells.

Techniques used:

  • Biochemistry and cellular biology: subcloning, recombinant protein expression, protein purification, centrosome purification, preparation of cellular extracts, study of protein interactions, spectrophotometry, stable cell line and neuronal primary cell cultures.

  • Light microscopy: total internal reflection fluorescence microscopy, video fluorescence microscopy.

  • Electron microscopy: negative stain, electron cryomicroscopy and cryotomography.

 

 

Publications

Velot L, Molina A, Rodrigues-Ferreira S, Nehlig A, Bouchet BP, Morel M, Leconte L, Serre L, ARNAL I, Braguer D, Savina A, Honore S and Nahmias C (2015). Negative regulation of EB1 turnover at microtubule plus ends by interaction with microtubule-associated protein ATIP3. Oncotarget 6, 43557-70.

Elie A, Prezel E, Guérin C, Denarier E, Ramirez-Rios S, Serre L, Andrieux A, Fourest-Lieuvin A, Blanchoin L and ARNAL I (2015) Tau co-organizes dynamic microtubule and actin networks. Sci Rep 5:9964. doi: 10.1038/srep09964

Sayas CL, Tortosa E, Bollati F, Ramirez-Rios S, ARNAL I and Avila J (2015) Tau regulates the localization and function of End binding proteins 1 and 3 (EB1/3) in neuronal cells. J Neurochem 133, 653-667.

Frandemiche M.L., De Seranno S., Rush T., Borel E., Elie A., Arnal I., Lanté F. and Buisson A. (2014). Activity dependent tau protein translocation to excitatory synapse is disrupted by exposure to Amyloid ? oligomers. J. Neuroscience, 34, 6084-6097.

Portran D., Zoccoler M., Gaillard J., Stoppin-Mellet V., Neumann E., Arnal I., Martiel J.L. and Vantard M. (2013). Map65/Ase1 promote microtubule flexibility. Mol. Biol. Cell 24: 1964-1973.


Updated on April 24, 2018

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