Format

Send to

Choose Destination
EMBO J. 2010 Jan 6;29(1):4-13. doi: 10.1038/emboj.2009.346. Epub 2009 Nov 26.

Multilayered control of gene expression by stress-activated protein kinases.

Author information

1
Cell Signaling Unit, Departament de Ciències Experimentals i de Salut, Universitat Pompeu Fabra, Barcelona, Spain. eulalia.nadal@upf.edu

Abstract

Stress-activated protein kinases (SAPKs) are key elements for intracellular signalling networks that serve to respond and adapt to extracellular changes. Exposure of yeast to high osmolarity results in the activation of p38-related SAPK, Hog1, which is essential for reprogramming the gene expression capacity of the cell by regulation of several steps of the transcription process. At initiation, active Hog1 not only directly phosphorylates several transcription factors to alter their activities, but also associates at stress-responsive promoters through such transcription factors. Once at the promoters, Hog1 serves as a platform to recruit general transcription factors, chromatin-modifying activities and RNA Pol II. In addition, the SAPK pathway has a role in elongation. At the stress-responsive ORFs, Hog1 recruits the RSC chromatin-remodelling complex to modify nucleosome organization. Several SAPKs from yeast to mammals have maintained some of the regulatory abilities of Hog1. Thus, elucidating the control of gene expression by the Hog1 SAPK should help to understand how eukaryotic cells implement a massive and rapid change on their transcriptional capacity in response to adverse conditions.

PMID:
19942851
PMCID:
PMC2808381
DOI:
10.1038/emboj.2009.346
[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for Wiley Icon for PubMed Central
Loading ...
Support Center