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  • Title: [Microtubules: functional polymorphisms of tubulin and associated proteins (structural and motor MAP's)].
    Author: Regnard C, Audebert S, Boucher D, Larcher JC, Eddé B, Denoulet P.
    Journal: C R Seances Soc Biol Fil; 1996; 190(2-3):255-68. PubMed ID: 8869236.
    Abstract:
    In neuronal cells, microtubules are built from a very large number of alpha- and beta-tubulin variants. This diversity is due to the expression of a multigene family and to a combination of several original posttranslational modifications. Similarly, structural and motor microtubule-associated proteins, which regulate the assembly of microtubules, the modeling of their network and the mediation of their functions, are also very heterogeneous. As a consequence, mixing of these two protein polymorphisms leads to the formation of functionally-distinct microtubules. We have shown that polyglutamylation, the major posttranslational modification of neuronal tubulin, was used as a progressive regulator in the binding of structural and motor microtubule-associated proteins, in modulating gradually the conformation of the tubulin carboxy-terminal domain, playing thus a crucial role in microtubule dynamics.
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