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"HYS2, an essential gene required for DNA replication in Saccharomyces cerevisiae." |
Sugimoto K, Sakamoto Y, Takahashi O, Matsumoto K |
Published Sept. 11, 1995 in Nucleic Acids Res volume 23 .
Pubmed ID: 7567461
Abstract:
| To investigate cell cycle regulation at the S or G2 phase in Saccharomyces cerevisiae, we have isolated mutants displaying supersensitivity to hydroxyurea (HU), a chemical that inhibits DNA replication. Such mutants, which we have named hydroxyurea sensitive (hys), defined four linkage groups and we characterized the hys2 mutation in this study. The hys2-1 mutant displays temperature sensitive growth and a constellation of phenotypes indicating defective DNA metabolism. At the restrictive temperature, hys2-1 cells arrest as large budded cells with a single nucleus at the neck of the bud and a short spindle. The hys2-1 mutant exhibits increased rates of chromosome loss and recombination. Additionally, hys2-1 appears to accumulate incompletely replicated DNA that can be detected by a pulse field electrophoresis assay. Finally, deletion of RAD9 in a hys2-1 strain decreases the percentage of arrested cells, suggesting that an intact RAD9-checkpoint is required for the cell cycle arrest in hys2-1 cells. HYS2 encodes a 55 kDa protein that is essential for viability at all temperatures. Taken together, these data suggest that Hys2 plays a role in DNA replication. |
This publication refers to following REPAIRtoire entries:
| Proteins |
Last modification of this entry: Oct. 6, 2010
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