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National Repository of Grey Literature 1 records found  Search took 0.00 seconds. 
Chromatin remodeling during temperature sensing in plants
 Šlesingerová, Terezie
The evolutionary conserved transcriptional co-activator Spt–Ada–Gcn5 Acetyltransferase (SAGA) complex in Arabidopsis thaliana is tightly involved in numerous cellular processes by histone posttranslational modifications. The GENERAL CONTROL NON-REPRESSED PROTEIN 5 (GCN5), a SAGA subunit, is a histone acetyltransferase that impacts chromatin remodeling. Arabidopsis mutants lacking GCN5 are sensitive to heat stress, but the molecular mechanisms implicating GCN5 in heat stress are currently unknown. To get an insight into the molecular pathways underlying the heat sensitivity of gcn5, we assessed global proteome changes triggered by heat stress in the gcn5 background. Even though most of the identified proteins responded similarly both in gcn5 and wild type plants, some of them like CONSTITUTIVE PHOTOMORPHOGENIC 11 (COP11) were unaffected by heat in the gcn5 mutant background but decreased drastically in the wild type. We further screened mutants affected in putative GCN5 interactors under heat stress and identified that lack of SAGA COMPLEX SUBUNIT 2A (SCS2A) and INHIBITOR OF GROWTH 1 (ING1) results in heat sensitivity. Taken together, our results pave the way for a more detailed understanding of the role of GCN5 in stress responses.
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