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A novel type of life cycle "delayed homothallism" in Saccharomyces cerevisiae wy2 showed slow interconversion of mating-type.
- Source :
-
Bioscience, biotechnology, and biochemistry [Biosci Biotechnol Biochem] 1994 Dec; Vol. 58 (12), pp. 2228-31. - Publication Year :
- 1994
-
Abstract
- Saccharomyces cerevisiae wy2 segregated to 2 mater and 2 non-mater in relation to mating ability. The non-mater segregants behaved as the normal type of homothallic life cycle. On the other hand, the mater segregants gradually formed spores during successive subcultures, indicating that slow interconversion of mating-type happened to occur during subcultures. We termed this novel type of life cycle "delayed homothallism". The results of complementation tests with standard ho strains and introduction of a wild type HO gene showed that delayed homothallism was caused by a defective HO gene. The amino acid sequence deduced from the nucleotide sequence of the wy2 HO gene differed from the wild type HO gene in three amino acid residues. In the carboxy terminus of HO protein, there are three repeats of cysteine and histidine that are postulated to play a role in binding of HO protein to DNA. However, wy2 HO protein lacked one such repeat at residues Cys470-His475, where His was replaced by Leu.
- Subjects :
- Amino Acid Sequence
Base Sequence
Cloning, Molecular
Deoxyribonucleases, Type II Site-Specific chemistry
Deoxyribonucleases, Type II Site-Specific metabolism
Genetic Complementation Test
Molecular Sequence Data
Saccharomyces cerevisiae growth & development
Saccharomyces cerevisiae Proteins
Sequence Homology, Amino Acid
Spores, Fungal
Transformation, Genetic
Deoxyribonucleases, Type II Site-Specific genetics
Genes, Fungal
Genes, Mating Type, Fungal
Saccharomyces cerevisiae genetics
Subjects
Details
- Language :
- English
- ISSN :
- 0916-8451
- Volume :
- 58
- Issue :
- 12
- Database :
- MEDLINE
- Journal :
- Bioscience, biotechnology, and biochemistry
- Publication Type :
- Academic Journal
- Accession number :
- 7765716
- Full Text :
- https://doi.org/10.1271/bbb.58.2228