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Altered genes expression profile of Rep2 mutants in Fission Yeast upon HU treatment.

ABSTRACT: 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

ORGANISM(S): Schizosaccharomyces pombe

PROVIDER: GSE10901 | GEO | 2010/01/08

SECONDARY ACCESSION(S): PRJNA107307

REPOSITORIES: GEO

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Altered genes expression profile of Rep2 mutants in Fission Yeast upon HU treatment.

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.

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Project description:Analysis of the response to hydroxyurea in a yeast aft1 mutant strain compared to wild-type strain (BY4741 or BY4742 backgrounds). Cells were grown in YPD rich medium containong 200 mM hydroxyurea (HU) for 2 hours. Analysis of the response to hydroxyurea in a yeast aft1aft2 mutant strain (Y18aft2d) compared to wild-type strain (CM3260). Cells were grown in YPD rich medium containing 200 mM hydroxyurea (HU) for 2 hours. Gene expression changes due to the aft1 mutation were also analysed in absence of HU (BY4741 background). Analysis of mid-term response to hydroxyurea in a yeast wild-type strain (W303a). Cells were grown in YPD rich medium containing 200 mM hydroxyurea (HU) for 2 hours. Gene expression changes were analysed compared to the same strain grown in the same medium without HU. Keywords: repeat sample

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RNAs binding to the nucleoid protein HU in Escherichia coli

Project description:HU is a conserved prokaryotic nucleoid-associated protein known for its role in DNA binding and maintaining negative supercoils in DNA. HU also binds to a few RNAs but the natural targets are unknown. To understand the biology of HU interactions with RNA in Escherichia coli, potential HU-RNA in vivo complexes were immunoprecipitated and bound RNAs were examined by hybridization to whole-genome tiling arrays. We observed HU associations with rRNA, multiple tRNAs, a few sRNAs and a small, distinct set of mRNAs. More importantly, we also identified associations between HU and ten intragenic non-coding (nonc) RNAs, two of which are homologous to the annotated Bacterial Interspersed Mosaic Elements (BIME) and boxC elements; the other eight RNAs have not been annotated. We confirmed binding of HU to BIME RNA in vitro. Since HU and some unidentified RNAs have been implicated in the nucleoid structure, we explored an idea that HU, along with some or all of the nonc RNA species discovered here bind to BIME and/or boxC repeats to condense chromosomal DNA in a specific fashion. We propose that nonc RNAs may interact with both HU and DNA repeats to form ternary complexes, which are the anchoring points separating different chromosomal domains.

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Yeast proteomic analysis upon Trp uptake

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HU treated cells vs wildtype untreated cells (asynchronized cells)

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Kc167 ORC Localization in hydroxyurea (HU)

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