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    S. pombe CLASP needs dynein, not EB1 or CLIP170, to induce microtubule instability and slows polymerization rates at cell tips in a dynein-dependent manner.

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    Authors
    Grallert, Agnes
    Beuter, Christoph
    Craven, Rachel A
    Bagley, Steven
    Wilks, Deepti P
    Fleig, Ursula
    Hagan, Iain M
    Affiliation
    Cancer Research UK Cell Division Group, Paterson Institute for Cancer Research, Manchester M20 4BX, United Kingdom.
    Issue Date
    2006-09-01
    
    Metadata
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    Abstract
    The Schizosaccharomyces pombe CLIP170-associated protein (CLASP) Peg1 was identified in a screen for mutants with spindle formation defects and a screen for molecules that antagonized EB1 function. The conditional peg1.1 mutant enabled us to identify key features of Peg1 function. First, Peg1 was required to form a spindle and astral microtubules, yet destabilized interphase microtubules. Second, Peg1 was required to slow the polymerization rate of interphase microtubules that establish end-on contact with the cortex at cell tips. Third, Peg1 antagonized the action of S. pombe CLIP170 (Tip1) and EB1 (Mal3). Fourth, although Peg1 resembled higher eukaryotic CLASPs by physically associating with both Mal3 and Tip1, neither Tip1 nor Mal3 was required for Peg1 to destabilize interphase microtubules or for it to associate with microtubules. Conversely, neither Mal3 nor Tip1 required Peg1 to associate with microtubules or cell tips. Consistently, while mal3.Delta and tip1.Delta disrupted linear growth, corrupting peg1 (+) did not. Fifth, peg1.1 phenotypes resembled those arising from deletion of the single heavy or both light chains of fission yeast dynein. Furthermore, all interphase phenotypes arising from peg1 (+) manipulation relied on dynein function. Thus, the impact of S. pombe CLASP on interphase microtubule behavior is more closely aligned to dynein than EB1 or CLIP170.
    Citation
    S. pombe CLASP needs dynein, not EB1 or CLIP170, to induce microtubule instability and slows polymerization rates at cell tips in a dynein-dependent manner. 2006, 20 (17):2421-36 Genes Dev.
    Journal
    Genes & Development
    URI
    http://hdl.handle.net/10541/72738
    DOI
    10.1101/gad.381306
    PubMed ID
    16951255
    Type
    Article
    Language
    en
    ISSN
    0890-9369
    ae974a485f413a2113503eed53cd6c53
    10.1101/gad.381306
    Scopus Count
    Collections
    All Paterson Institute for Cancer Research

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