Saccharomyces cerevisiae
Ontology highlight
ABSTRACT:
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| DRR093936_1.fastq.gz | Fastqsanger.gz | |||
| DRR093936_2.fastq.gz | Fastqsanger.gz | |||
| DRR093937_1.fastq.gz | Fastqsanger.gz | |||
| DRR093937_2.fastq.gz | Fastqsanger.gz | |||
| DRR093938_1.fastq.gz | Fastqsanger.gz |
Items per page: 5 1 - 5 of 22 |
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Project description:Genetic characterization of Mie sake yeast strains
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Project description:Aneuploidy and aging are correlated; however, a causal link between these two phenomena has remained elusive. Here we show that yeast disomic for a single native yeast chromosome generally have a decreased replicative lifespan. In addition, the extent of this lifespan deficit correlates with the size of the extra chromosome. We identified a mutation in BUL1 that rescues both the lifespan deficit and a protein trafficking defect in yeast disomic for chromosome 5. Bul1 is an E4 ubiquitin ligase adaptor involved in a protein quality-control pathway that targets membrane proteins for endocytosis and destruction in the lysosomal vacuole thereby maintaining protein homeostasis. Concurrent suppression of the aging and trafficking phenotypes suggests that disrupted membrane protein homeostasis in aneuploid yeast may contribute to their accelerated aging. The data reported here demonstrate that aneuploidy can impair protein homeostasis, shorten lifespan, and may contribute to age-associated phenotypes.
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Project description:Our previous report revealed that protein phosphatase 2A (PP2A), complexed with the B55delta-type regulatory subunit (i.e. Cdc55p), is solely responsible for the outstanding glycolytic activity of sake yeast strains (Watanabe et al., Appl. Environ. Microbiol. 85, e02083-18 (2019). However, how PP2A mediates yeast alcoholic fermentation remains elusive. Thus, RNA-seq analysis of S. cerevisiae cdc55-delta cells at the initial fermentation stage was performed to identify the downstream effector targeting the glycolytic control.
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Project description:Aneuploidy and epigenetic alterations have long been associated with carcinogenesis, but it was unknown whether aneuploidy could disrupt the epigenetic states required for cellular differentiation. In this study, we found that ~3% of random aneuploid karyotypes in yeast disrupt the stable inheritance of silenced chromatin during cell proliferation. Karyotype analysis revealed that this phenotype was significantly correlated with gains of chromosomes III and X. Chromosome X disomy alone was sufficient to disrupt chromatin silencing and yeast mating-type identity as indicated by a lack of growth response to pheromone. The silencing defect was not limited to the cryptic mating type loci but was associated with global changes in histone modifications and chromatin localization of Sir2 histone deacetylase. The chromatin-silencing defect of disome X can be partially recapitulated by increasing the copy number of several genes on chromosome X. These results suggest that aneuploidy can directly cause epigenetic instability and disrupt cellular differentiation.
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Project description:Breeding sake yeast and identification of mutation patterns by synchrotron light irradiation
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Project description:Aneuploidy and aging are correlated; however, a causal link between these two phenomena has remained elusive. Here we show that yeast disomic for a single native yeast chromosome generally have a decreased replicative lifespan. In addition, the extent of this lifespan deficit correlates with the size of the extra chromosome. We identified a mutation in BUL1 that rescues both the lifespan deficit and a protein trafficking defect in yeast disomic for chromosome 5. Bul1 is an E4 ubiquitin ligase adaptor involved in a protein quality-control pathway that targets membrane proteins for endocytosis and destruction in the lysosomal vacuole thereby maintaining protein homeostasis. Concurrent suppression of the aging and trafficking phenotypes suggests that disrupted membrane protein homeostasis in aneuploid yeast may contribute to their accelerated aging. The data reported here demonstrate that aneuploidy can impair protein homeostasis, shorten lifespan, and may contribute to age-associated phenotypes. These are all CGH arrays comparing DNA content between the indicated strain of interest and a wt control.
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