title: Transcriptional response of Saccharomyces cerevisiae to desiccation and rehydration.
abstract: A transcriptional analysis of the response of Saccharomyces cerevisiae strain BY4743 to controlled air-drying (desiccation) and subsequent rehydration under minimal glucose conditions was performed. Expression of genes involved in fatty acid oxidation and the glyoxylate cycle was observed to increase during drying and remained in this state during the rehydration phase. When the BY4743 expression profile for the dried sample was compared to that of a commercially prepared dry active yeast, strikingly similar expression changes were observed. The fact that these two samples, dried by different means, possessed very similar transcriptional profiles supports the hypothesis that the response to desiccation is a coordinated event independent of the particular conditions involved in water removal. Similarities between "stationary-phase-essential genes" and those upregulated during desiccation were also noted, suggesting commonalities in different routes to reduced metabolic states. Trends in extracellular and intracellular glucose and trehalose levels suggested that the cells were in a "holding pattern" during the rehydration phase, a concept that was reinforced by cell cycle analyses. Application of a "redescription mining" algorithm suggested that sulfur metabolism is important for cell survival during desiccation and rehydration.
authors.affiliation: Virginia Tech Center for Genomics, Department of Biochemistry, Virginia Tech, Blacksburg, VA 24061, USA.
authors.forename: Jatinder
authors.initials: J
authors.lastname: Singh
authors.forename: Deept
authors.initials: D
authors.lastname: Kumar
authors.forename: Naren
authors.initials: N
authors.lastname: Ramakrishnan
authors.forename: Vibha
authors.initials: V
authors.lastname: Singhal
authors.forename: Jody
authors.initials: J
authors.lastname: Jervis
authors.forename: James F
authors.initials: JF
authors.lastname: Garst
authors.forename: Stephen M
authors.initials: SM
authors.lastname: Slaughter
authors.forename: Andrea M
authors.initials: AM
authors.lastname: DeSantis
authors.forename: Malcolm
authors.initials: M
authors.lastname: Potts
authors.forename: Richard F
authors.initials: RF
authors.lastname: Helm
mesh_terms: D002470:Cell Survival; D003890:Desiccation; D005227:Fatty Acids / Q000378:metabolism; D005800:Genes, Fungal; D005947:Glucose / Q000378:metabolism; D006038:Glyoxylates / Q000378:metabolism; D007700:Kinetics; D008954:Models, Biological; D010084:Oxidation-Reduction; D012441:Saccharomyces cerevisiae / Q000166:cytology / Q000235:genetics / Q000502:physiology*; D014158:Transcription, Genetic; D014199:Trehalose / Q000378:metabolism
chemical_list: D005227:Fatty Acids; D006038:Glyoxylates; D014199:Trehalose; D005947:Glucose