Project description:Expression profiles indicate that C-terminal of rep2 is essential for its transactivation activity. Keywords: rep2 mutants cells treated with 8 mM HU for different time points vs wildtype untreated cells
Project description:Expression profiles indicate that C-terminal of rep2 is essential for its transactivation activity. Keywords: rep2 mutants cells treated with 8 mM HU for different time points vs wildtype untreated cells We analyzed 40 arrays for rep2 mutants cells treated with 8 mM HU to wild type cells.
Project description:DNA replication checkpiont kinase rad3 (human ATM/ATR-like kinase) and cds1 (human CHK2-like kinase) are known to restore stalled replication forks and prevent subsequent cell cycle progression during a replication block imposed by HU-treatment in fission yeast. In order to identify cell cycle-specific exression which are modulated by replication checkpoint kinase rad3 and cds1, microarray approach was used to profile asynchronous and synchronous cells of wildtype and mutants treated and untreated with HU Keywords: HU treated cells vs wildtype untreated cells
Project description:Hydroxyurea (HU) is toxic to Sulfolobus cells. To address the basis of the HU toxicity, we performed transcriptome analyses on untreated cells and cells following exposure to 5 mM HU for 4 hours.
Project description:DNA replication checkpiont kinase rad3 (human ATM/ATR-like kinase) and cds1 (human CHK2-like kinase) are known to restore stalled replication forks and prevent subsequent cell cycle progression during a replication block imposed by HU-treatment in fission yeast. In order to identify cell cycle-specific exression which are modulated by replication checkpoint kinase rad3 and cds1, microarray approach was used to profile asynchronous and synchronous cells of wildtype and mutants treated and untreated with HU Keywords: HU treated cells vs wildtype untreated cells
Project description:In this study, we map sites of replication initiation and breakage in primary cells at high resolution under conditions of replication stress. We show that replication initiates between transcribed genes within nucleosome-depleted structures established by long asymmetrical poly(dA:dT) tracts flanking the initiation site. Paradoxically, large (>20 bp) homopolymeric (dA/dT) tracts are also preferential sites of polar replication fork stalling and collapse. We propose that the evolutionary expansion of poly(dA:dT) tracts in eukaryotic genomes serves to promote replication initiation, but at the cost of increasing chromosome fragility.
Project description:In this study, we map sites of replication initiation and breakage in primary cells at high resolution under conditions of replication stress. We show that replication initiates between transcribed genes within nucleosome-depleted structures established by long asymmetrical poly(dA:dT) tracts flanking the initiation site. Paradoxically, large (>20 bp) homopolymeric (dA/dT) tracts are also preferential sites of polar replication fork stalling and collapse. We propose that the evolutionary expansion of poly(dA:dT) tracts in eukaryotic genomes serves to promote replication initiation, but at the cost of increasing chromosome fragility.