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Benomyl resistant mutants of Schizosaccharomyces pombe cold-sensitive for mitosis

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Summary

We have isolated 150 benomyl resistant mutants of the fission yeast Schizosaccharomyces pombe. Seven of these mutants were found to be cold sensitive for mitosis. These mutants were the subject of physiological, cytological and genetical characterisation. Growth and division of the seven mutants were similar to the wild type strain at 35 °C. After shift from the permissive (35 °C) to the restrictive temperature (20 °C) the mutants became blocked in mitosis whilst cellular growth continued. Consequently, elongate cells were formed. Six of the seven benomyl resistant mutants became blocked in mitosis at 20 °C with a single aberrant nucleus. In every case the benomyl resistant and cold sensitive phenotype was due to a mutation in a single nuclear gene. These mutants were found to comprise a single genetic linkage group (ben4) and were unlinked to existing TBZ/MBC resistant mutants of S. pombe. Whilst no cross resistance was found in our mutants to TBZ, six of the seven mutants were super sensitive to the spindle poison CIPC. We believe that the phenotype exhibited by these mutants is consistent with a defective tubulin subunit.

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Authors and Affiliations

  1. Department of Zoology, University of Edinburgh, EH9 3JT, Edinburgh, UK

    Douglas Roy & Peter A. Fantes

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  1. Douglas Roy
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  2. Peter A. Fantes
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Roy, D., Fantes, P.A. Benomyl resistant mutants of Schizosaccharomyces pombe cold-sensitive for mitosis. Curr Genet 6, 195–201 (1982). https://doi.org/10.1007/BF00390338

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  • DOI: https://doi.org/10.1007/BF00390338

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