Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Transcription profiling of yeast at high hydrostatic pressure


ABSTRACT: S. cerevisiae Y440 Mat a leu2 was grown in YEPD at 28 0C with aeration to exponential growth phase and was subjected to a hydrostatic pressure of 50 and 200 MPa for 30 minutes at room temperature. Total RNA was extracted using phenol/chloroform and further precipitated with 3 M sodium acetate / absolute ethanol. Extracted RNA samples were treated for 10 min with 0.5 U of RNAse-free DNAse I /g RNA at 37 oC to remove any residual genomic DNA. RNA pellets were washed in 70 % ethanol and resuspended in DEPC treated water. Purified mRNA from pressurized and unpressurized cells was reversed-transcribed, labeled with fluorescent-tagged nucleotides, and hybridized against a common refernce pool of mRNA for 18 h at 65 0C on cDNA microarray. After several washes, arrays were scanned using a commercially available scanning laser microscope (GenePix 4000) from Axon Instruments (Foster City, CA), the data obtained was normalized (mean value) applying a linear regression method.

ORGANISM(S): Saccharomyces cerevisiae

SUBMITTER: Janos Demeter 

PROVIDER: E-SMDB-2406 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Genomic expression pattern in Saccharomyces cerevisiae cells in response to high hydrostatic pressure.

Fernandes Patricia M B PM   Domitrovic Tatiana T   Kao Camilla M CM   Kurtenbach Eleonora E  

FEBS letters 20040101 1-3


Gene expression patterns in response to hydrostatic pressure were determined by whole genome microarray hybridization. Functional classification of the 274 genes affected by pressure treatment of 200 MPa for 30 min revealed a stress response expression profile. The majority of the >2-fold upregulated genes were involved in stress defense and carbohydrate metabolism while most of the repressed ones were in cell cycle progression and protein synthesis categories. Furthermore, uncharacterized genes  ...[more]

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