Sci. Signal., 29 January 2008
Cell Biology How Yeast Responds to Change
L. Bryan Ray
Science, Science Signaling, AAAS, Washington, DC 20005, USA
The origin of the rapid adaptive response of yeast cells to changes in environmental osmolarity has been unclear. Mettetal et al. (see the Perspective by Lipan) now show that increases in extracellular osmolarity activate the high-osmolarity glycerol signaling pathway, which changes transcription of particular target genes. By measuring the cellular response to pulses of medium with increased ionic strength, the authors were able to develop a predictive model of the dynamics of this regulatory system. Rather than changes in gene expression, which have often been suggested to be at the core of the response to osmotic shock, the fast response is actually dominated by a nontranscriptional response that probably involves altered glycerol transport.
Citation: L. B. Ray, How Yeast Responds to Change. Sci. Signal. 1, ec39 (2008).
Science Signaling. ISSN 1937-9145 (online), 1945-0877 (print). Pre-2008: Science's STKE. ISSN 1525-8882