Genome-wide characterisation of the Gcn5 histone acetyltransferase in budding yeast during stress adaptation reveals evolutionarily conserved and diverged roles
2010 (English)In: BMC Genomics, ISSN 1471-2164, E-ISSN 1471-2164, Vol. 11, 200Article in journal (Refereed) Published
Background: Gcn5 is a transcriptional coactivator with histone cetyltransferase activity that is conserved with regard to structure as ell as its histone substrates throughout the eukaryotes. Gene egulatory networks within cells are thought to be evolutionarily iverged. The use of evolutionarily divergent yeast species, such as S. erevisiae and S. pombe, which can be studied under similar nvironmental conditions, provides an opportunity to examine the nterface between conserved regulatory components and their cellular pplications in different organisms. esults: We show that Gcn5 is important for a common set of stress esponses in evolutionarily diverged yeast species and that the activity f the conserved histone acetyltransferase domain is required. We define group of KCl stress response genes in S. cerevisiae that are pecifically dependent on Gcn5. Gcn5 is localised to many Gcn5-dependent enes including Gcn5 repressed targets such as FLO8. Gcn5 regulates ivergent sets of KCl responsive genes in S. cerevisiae and S. pombe. enome-wide localization studies showed a tendency for redistribution of cn5 during KCl stress adaptation in S. cerevisiae from short genes to he transcribed regions of long genes. An analogous redistribution was ot observed in S. pombe. onclusions: Gcn5 is required for the regulation of divergent sets of Cl stress-response genes in S. cerevisiae and S. pombe even though it s required a common group of stress responses, including the response o KCl. Genes that are physically associated with Gcn5 require its ctivity for their repression or activation during stress adaptation, roviding support for a role of Gcn5 as a corepressor as well as a oactivator. The tendency of Gcn5 to re-localise to the transcribed egions of long genes during KCl stress adaptation suggests that Gcn5 lays a specific role in the expression of long genes under adaptive onditions, perhaps by regulating transcriptional elongation as has been een for Gcn5 in S. pombe. Interestingly an analogous redistribution of cn5 is not seen in S. pombe. The study thus provides important new nsights in relation to why coregulators like Gcn5 are required for the orrect expression of some genes but not others.
Place, publisher, year, edition, pages
2010. Vol. 11, 200
Medical Biotechnology (with a focus on Cell Biology (including Stem Cell Biology), Molecular Biology, Microbiology, Biochemistry or Biopharmacy)
IdentifiersURN: urn:nbn:se:sh:diva-13712DOI: 10.1186/1471-2164-11-200ISI: 000277270600002PubMedID: 2861062ScopusID: 2-s2.0-77952260641OAI: oai:DiVA.org:sh-13712DiVA: diva2:462187
Som manuskript i avhandling. As manuscript in dissertation.
Functional aspects of the Gcn5 histone acetyltransferase in stress responses of evolutionarily diverged yest species2011-12-062011-12-062016-09-15Bibliographically approved