Lysine Acetyltransferase Antibody Sampler Kit

Background

CREB-binding protein (CBP) and p300 are highly conserved and functionally related transcriptional co-activators that associate with transcriptional regulators and signaling molecules, integrating multiple signal transduction pathways with the transcriptional machinery (1,2). CBP/p300 also contain histone acetyltransferase (HAT) activity, allowing them to acetylate histones and other proteins (2). The role of acetylation of CBP/p300 is of particular interest (2,3). Acetylation of p300 at Lys1499 has been demonstrated to enhance its HAT activity and affect a wide variety of signaling events (4). p300/CBP-associated factor (PCAF), also known as lysine acetyl-transferase 2B (KAT2B) (5), and General Control of Amino Acid Synthesis Yeast Homolog Like 2 (GCN5L2) (6) are transcriptional adaptor proteins in addition to HATs. PCAF functions as the catalytic subunit of the PCAF transcriptional co-activator complex (5). GCN5L2 functions as the catalytic subunit of the STAGA and TFTC transcription coactivator complexes (6). PCAF and GCN5L2 acetylate histone H3 at Lys14 and histone H4 at Lys8, both of which contribute to gene activation by modulating chromatin structure and recruiting additional co-activator proteins that contain acetyl-lysine binding bromo-domains (7,8). PCAF also acetylates non-histone proteins including transcriptional activators (p53, E2F1, MyoD) and general transcription factors (TFIIEβ and TFIIF) (9-12). GCN5L2 also acetylates non-histone proteins such as transcription activators (TAT, c-Myb) (13,14), transcription co-activators (PGC1-α) (15), and nuclear receptors (Steroidogenic Factor 1) (16). Acetylation of these proteins regulates their nuclear localization, protein stability, DNA binding, and co-activator association (13-16).