KAT2A / GCN5 is a transcriptional co-activator that has histone acetyltransferase activity. It exhibits significant histone acetyltransferase activity with core histones but not with nucleosome core particles. KAT2A is a component of the TFTC-HAT and STAGA complexes. KAT2A is also recruited by the viral protein Tat during HIV infection, inducing chromatin remodelling of proviral genes.
