Component of the mst2 complex which is a highly specific H3 lysine 14 (H3K14) acetyltransferase that functions together with gcn5 to regulate global levels of H3K14 acetylation (H3K14ac), critical for DNA damage checkpoint activation. Component of the mst2 complex composed of at least eaf6, mst2, nto1, pdp3, ptf1, ptf2 and tfg3.