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Brain Res Bull. 2007 Mar 30;71(6):541-58. Epub 2006 Dec 27.

Microtubule-associated protein 1B, a growth-associated and phosphorylated scaffold protein.

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  • 1D√©partement de Biologie Cellulaire et de Morphologi), Universit√© de Lausanne, 9 rue du Bugnon, CH-1005 Lausanne, Switzerland. Beat.Riederer@unil.ch


Microtubule-associated protein 1B, MAP1B, is one of the major growth associated and cytoskeletal proteins in neuronal and glial cells. It is present as a full length protein or may be fragmented into a heavy chain and a light chain. It is essential to stabilize microtubules during the elongation of dendrites and neurites and is involved in the dynamics of morphological structures such as microtubules, microfilaments and growth cones. MAP1B function is modulated by phosphorylation and influences microtubule stability, microfilaments and growth cone motility. Considering its large size, several interactions with a variety of other proteins have been reported and there is increasing evidence that MAP1B plays a crucial role in the stability of the cytoskeleton and may have other cellular functions. Here we review molecular and functional aspects of this protein, evoke its role as a scaffold protein and have a look at several pathologies where the protein may be involved.

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