REGULATION OF MATING AND MEIOSIS IN YEAST BY THE MATING-TYPE REGION
نویسندگان
چکیده
منابع مشابه
Regulation of mating and meiosis in yeast by the mating-type region.
A supposed sporulation-deficient mutation of Saccharomyces cerevisiae is found to affect mating in haploids and in diploids, and to be inseparable from the mating-type locus by recombination. The mutation is regarded as a defective a allele and is designated a*. This is confirmed by its dominance relations in diploids, triploids, and tetraploids. Tetrad analysis of tetraploids and of their spor...
متن کاملRegulation of fission yeast mating-type interconversion by chromosome imprinting.
Mating types of the fission yeast Schizosaccharomyces pombe interchange nonrandomly in a cell lineage so that only one cell among four granddaughters of a cell ever switches, and the sister of the newly switched cell switches efficiently in consecutive cell divisions, thereby producing chains of recurrent switching. The programme of cellular differentiation is mediated by inheritance of parenta...
متن کاملYeast Mating Type
Saccharomyces cerevisiae, baker’s yeast, can exist in either a haploid (1n) or a diploid (2n) state. Haploids express one of two mating types, a or a (alpha). Haploids of either mating type are capable of mating with haploids of the opposite mating type in response to the action of mating pheromones. Mating results in fusion of haploid cells, forming an a/a diploid, which is no longer capable o...
متن کاملRegulation of yeast mating-type interconversion: feedback control of HO gene expression by the mating-type locus.
The ultimate product of yeast mating-type interconversion is a stable a/alpha diploid cell. A haploid cell carrying the HO gene gives rise to a diploid cell in a two-step process: first, the cell switches mating type as a result of genetic rearrangement (cassette substitution) catalyzed by HO; then, cells of opposite type mate to form a/alpha diploids. Mating-type interconversion does not occur...
متن کاملThe mating-type proteins of fission yeast induce meiosis by directly activating mei3 transcription.
Cell type control of meiotic gene regulation in the budding yeast Saccharomyces cerevisiae is mediated by a cascade of transcriptional repressors, a1-alpha2 and Rme1. Here, we investigate the analogous regulatory pathway in the fission yeast Schizosaccharomyces pombe by analyzing the promoter of mei3, the single gene whose expression is sufficient to trigger meiosis. The mei3 promoter does not ...
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ژورنال
عنوان ژورنال: Genetics
سال: 1976
ISSN: 1943-2631
DOI: 10.1093/genetics/82.2.187