Mol._Cell._Biol.-2005-Morishita-8074-83.pdf (467.24 kB)
Role of the Schizosaccharomyces pombe F-box DNA helicase in processing recombination intermediates.
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posted on 2023-06-08, 06:26 authored by Takashi Morishita, Fumiko Furukawa, Chikako Sakaguchi, Takashi Toda, Antony CarrAntony Carr, Hiroshi Iwasaki, Hideo ShinagawaIn an effort to identify novel genes involved in recombination repair, we isolated fission yeast Schizosaccharomyces pombe mutants sensitive to methyl methanesulfonate (MMS) and a synthetic lethal with rad2. A gene that complements such mutations was isolated from the S. pombe genomic library, and subsequent analysis identified it as the fbh1 gene encoding the F-box DNA helicase, which is conserved in mammals but not conserved in Saccharomyces cerevisiae. An fbh1 deletion mutant is moderately sensitive to UV, MMS, and ¿ rays. The rhp51 (RAD51 ortholog) mutation is epistatic to fbh1. fbh1 is essential for viability in stationary-phase cells and in the absence of either Srs2 or Rqh1 DNA helicase. In each case, lethality is suppressed by deletion of the recombination gene rhp57. These results suggested that fbh1 acts downstream of rhp51 and rhp57. Following UV irradiation or entry into the stationary phase, nuclear chromosomal domains of the fbh1¿ mutant shrank, and accumulation of some recombination intermediates was suggested by pulsed-field gel electrophoresis. Focus formation of Fbh1 protein was induced by treatment that damages DNA. Thus, the F-box DNA helicase appears to process toxic recombination intermediates, the formation of which is dependent on the function of Rhp51.
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- Published
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- Published version
Journal
Molecular and Cellular BiologyISSN
0270-7306External DOI
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18Volume
25Page range
8074-8083Pages
10.0Department affiliated with
- Sussex Centre for Genome Damage Stability Publications
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- Yes
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- Yes
Legacy Posted Date
2012-02-06First Open Access (FOA) Date
2016-03-22First Compliant Deposit (FCD) Date
2016-11-16Usage metrics
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