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A conceptual view at microtubule plus end dynamics in neuronal axons

View ORCID ProfileAndré Voelzmann, View ORCID ProfileInes Hahn, View ORCID ProfileSimon P. Pearce, View ORCID ProfileNatalia Sánchez-Soriano, View ORCID ProfileAndreas Prokop
doi: https://doi.org/10.1101/062711
André Voelzmann
1The University of Manchester, Faculty of Biology, Medicine and Health, Michael Smith Building, Oxford Road, Manchester M13 9PT, UK
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Ines Hahn
1The University of Manchester, Faculty of Biology, Medicine and Health, Michael Smith Building, Oxford Road, Manchester M13 9PT, UK
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Simon P. Pearce
1The University of Manchester, Faculty of Biology, Medicine and Health, Michael Smith Building, Oxford Road, Manchester M13 9PT, UK
2The University of Manchester, School of Mathematics, Alan Turing Building, Oxford Road, Manchester M13 9PL, UK
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Natalia Sánchez-Soriano
3University of Liverpool, Institute of Translational Medicine, Department of Cellular and Molecular Physiology, Crown Street, Liverpool, L69 3BX, UK
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Andreas Prokop
1The University of Manchester, Faculty of Biology, Medicine and Health, Michael Smith Building, Oxford Road, Manchester M13 9PT, UK
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Abstract

Axons are the cable-like protrusions of neurons which wire up the nervous system. Polar bundles of microtubules (MTs) constitute their structural backbones and are highways for life-sustaining transport between proximal cell bodies and distal synapses. Any morphogenetic changes of axons during development, plastic rearrangement, regeneration or degeneration depend on dynamic changes of these MT bundles. A key mechanism for implementing such changes is the coordinated polymerisation and depolymerisation at the plus ends of MTs within these bundles. To gain an understanding of how such regulation can be achieved at the cellular level, we provide here an integrated overview of the extensive knowledge we have about the molecular mechanisms regulating MT de/polymerisation. We first summarise insights gained from work in vitro, then describe the machinery which supplies the essential tubulin building blocks, the protein complexes associating with MT plus ends, and MT shaft-based mechanisms that influence plus end dynamics. We briefly summarise the contribution of MT plus end dynamics to important cellular functions in axons, and conclude by discussing the challenges and potential strategies of integrating the existing molecular knowledge into conceptual understanding at the level of axons.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted August 15, 2016.
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A conceptual view at microtubule plus end dynamics in neuronal axons
André Voelzmann, Ines Hahn, Simon P. Pearce, Natalia Sánchez-Soriano, Andreas Prokop
bioRxiv 062711; doi: https://doi.org/10.1101/062711
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A conceptual view at microtubule plus end dynamics in neuronal axons
André Voelzmann, Ines Hahn, Simon P. Pearce, Natalia Sánchez-Soriano, Andreas Prokop
bioRxiv 062711; doi: https://doi.org/10.1101/062711

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