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The elongator complex is a major component of the RNA polymerase II (RNAPII) holoenzyme responsible for transcriptional elongation in yeast. Here we identify Elp3, the 60-kilodalton subunit of elongator/RNAPII holoenzyme, as a highly conserved histone acetyltransferase (HAT) capable of acetylating core histones in vitro. In vivo, ELP3 gene deletion confers typical elp phenotypes such as slow growth...
The form of RNA polymerase II (RNAPII) engaged in transcriptional elongation was isolated. Elongating RNAPII was associated with a novel multisubunit complex, termed elongator, whose stable interaction was dependent on a hyperphosphorylated state of the RNAPII carboxy-terminal domain (CTD). A free form of elongator was also isolated, demonstrating the discrete nature of the complex, and free elongator...