title: Piezophysiology of genome wide gene expression levels in the yeast Saccharomyces cerevisiae.
abstract: Hydrostatic pressure is one of the physical factors affecting cellular physiology. Hydrostatic pressure of a few hundred MPa decreases the viability of yeast cells, and pressure of a few tens MPa decreases the growth rate. To understand the effect of hydrostatic pressure, we employed yeast DNA microarrays and analyzed genome-wide gene-expression levels after the pressure treatment with 180 MPa (immediate) at 4 degrees C and recovery incubation for 1 h and 40 MPa (16 h) at 4 degrees C and recovery incubation for 1 h. The transcription of genes involved in energy metabolism, cell defense, and protein metabolism was significantly induced by the pressure treatment. Genome-wide expression profiles suggested that high pressure caused damage to cellular organelles, since the induced gene products were localized in the membrane structure and/or cellular organelles. Hierarchical clustering analysis suggested that the damage caused by the pressure was similar to that caused by detergents, oils, and freezing/thawing. We also estimated the contribution of induced genes to barotolerance using some strains that have the deletion in the corresponding genes.
authors.affiliation: Human Stress Signal Research Center, National Institute of Advanced Industrial Science and Technology, Central-6, Higashi 1-1, Tsukuba 305-8566, Ibaraki, Japan. hitoshi.iwahashi@aist.go.jp
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Iwahashi
authors.forename: Hisayo
authors.initials: H
authors.lastname: Shimizu
authors.forename: Mine
authors.initials: M
authors.lastname: Odani
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Komatsu
mesh_terms: D000818:Animals; D016000:Cluster Analysis; D020869:Gene Expression Profiling; D015966:Gene Expression Regulation, Fungal; D016681:Genome, Fungal; D006874:Hydrostatic Pressure; D020411:Oligonucleotide Array Sequence Analysis / Q000379:methods; D012441:Saccharomyces cerevisiae / Q000201:enzymology / Q000235:genetics* / Q000502:physiology*; D029701:Saccharomyces cerevisiae Proteins / Q000032:analysis / Q000235:genetics
chemical_list: D029701:Saccharomyces cerevisiae Proteins