Mechanisms of stimulation of SAGA-mediated nucleosome acetylation by a transcriptional activator.

ABSTRACT: Eukaryotic gene expression requires the coordination of multiple factors to overcome the repressive nature of chromatin. However, the mechanistic details of this coordination are not well understood. The SAGA family of transcriptional coactivators interacts with DNA-binding activators to establish regions of hyperacetylation. We have previously shown that, contrary to the prevailing model in which activator protein increases SAGA affinity for nucleosome substrate, the Gal4-VP16 activator model system augments the rate of acetylation turnover for the SAGA complex from budding yeast. To better understand how this stimulation occurs, we have identified necessary components using both kinetics assays and binding interactions studies. We find that Gal4-VP16-mediated stimulation requires activat

SUBMITTER: Culbertson SJ 

PROVIDER: S-EPMC7786029 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature