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. 1985 Apr;82(8):2447–2451. doi: 10.1073/pnas.82.8.2447

Negative control for the initiation of meiosis in Schizosaccharomyces pombe

Yuichi Iino 1, Masayuki Yamamoto 1,*
PMCID: PMC397575  PMID: 16593556

Abstract

Temperature-sensitive mutants of the pat1 gene of Schizosaccharomyces pombe are able to produce poorly viable spores from the haploid state without the requirement for nitrogen starvation if exposed to the restrictive temperature. Three lines of evidence strongly suggest that this gene codes for a factor whose physiological role is inhibition of initiation of meiosis. First, pat1 haploids arrested in G1 phase undergo apparent premeiotic DNA synthesis at the restrictive temperature. Second, the pat1 gene was found to exert its function at a specified stage of the meiotic pathway by comparison with other meiotic mutants. Third, meiotic recombination and chromosome segregation take place quite normally in pat1 diploids at the restrictive temperature, resulting in the production of highly viable spores. A negative control mechanism for meiosis is proposed.

Keywords: pat1 mutation, haploid sporulation, premeiotic DNA synthesis, recombination, chromosome segregation

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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