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- W2150834170 abstract "Microtubules (MTs) are often organized by a nucleus-associated MT organizing center (MTOC). In addition, in neurons and epithelial cells, motor-based transport of assembled MTs determines the polarity of the MT array. Here, we show that MT motility participates in MT organization in the fungus Ustilago maydis. In budding cells, most MTs are nucleated by three to six small and motile gamma-tubulin-containing MTOCs at the boundary of mother and daughter cell, which results in a polarized MT array. In addition, free MTs and MTOCs move rapidly throughout the cytoplasm. Disruption of MTs with benomyl and subsequent washout led to an equal distribution of the MTOC and random formation of highly motile and randomly oriented MTs throughout the cytoplasm. Within 3 min after washout, MTOCs returned to the neck region and the polarized MT array was reestablished. MT motility and polarity of the MT array was lost in dynein mutants, indicating that dynein-based transport of MTs and MTOCs polarizes the MT cytoskeleton. Observation of green fluorescent protein-tagged dynein indicated that this is achieved by off-loading dynein from the plus-ends of motile MTs. We propose that MT organization in U. maydis involves dynein-mediated motility of MTs and nucleation sites." @default.
- W2150834170 created "2016-06-24" @default.
- W2150834170 creator A5039810233 @default.
- W2150834170 creator A5063715755 @default.
- W2150834170 date "2006-07-01" @default.
- W2150834170 modified "2023-09-27" @default.
- W2150834170 title "Dynein-dependent Motility of Microtubules and Nucleation Sites Supports Polarization of the Tubulin Array in the Fungus<i>Ustilago maydis</i>" @default.
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- W2150834170 doi "https://doi.org/10.1091/mbc.e05-12-1118" @default.
- W2150834170 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/1483053" @default.
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