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HMWMAP2: new perspectives on a pathway to dendritic identity.
Carole Abi Farah1, Nicole Leclerc
1Département de Pathologie et Biologie Cellulaire, Université de Montréal, C.P.6128, Succ. Centre-ville, Montréal, Québec, Canada. carole.abifarah@mcgill.ca
Cell Motility and the Cytoskeleton
|May 14, 2008
Summary
High molecular weight MAP2 proteins (HMWMAP2) are crucial for neuronal polarity, establishing dendritic identity. Beyond microtubule stabilization, HMWMAP2 anchor organelles and signaling proteins, and act as neurosteroid receptors.
Area of Science:
- Neuroscience
- Cell Biology
- Molecular Biology
Background:
- Neuronal polarity, essential for nervous system function, is established by differentiating dendrites and axons.
- Microtubule-associated proteins (MAPs) like high molecular weight MAP2 proteins (HMWMAP2) and tau proteins distinguish dendritic and axonal compartments.
- HMWMAP2 are traditionally recognized for promoting microtubule assembly and stability in dendrites.
Purpose of the Study:
- To expand the understanding of HMWMAP2's role in dendritic development.
- To highlight HMWMAP2's function beyond microtubule stabilization in defining dendritic identity.
Main Methods:
- This article presents a conceptual overview based on recent research findings.
- It synthesizes evidence regarding the multifaceted functions of HMWMAP2.
Main Results:
- HMWMAP2 actively contribute to dendritic identity by anchoring membranous organelles and signaling proteins to microtubules.
- HMWMAP2 also function as receptors for neurosteroids, suggesting a role in modulating dendritic function.
- These findings broaden the scope of HMWMAP2's influence on dendritic microtubules.
Conclusions:
- HMWMAP2 are key players in establishing and maintaining dendritic identity.
- Their roles include microtubule stabilization, organelle/protein anchoring, and neurosteroid reception.
- A comprehensive understanding of HMWMAP2 is vital for comprehending neuronal structure and function.
