FEATURES

FAMILY

DESCRIPTION

Also known as KAT2B_MOUSE, Kat2b, Pcaf. Functions as a histone acetyltransferase (HAT) to promote transcriptional activation. Has significant histone acetyltransferase activity with core histones (H3 and H4), and also with nucleosome core particles. Also acetylates non-histone proteins, such as ACLY, PLK4, RRP9/U3-55K and TBX5. Acts as a circadian transcriptional coactivator which enhances the activity of the circadian transcriptional activators: NPAS2-ARNTL/BMAL1 and CLOCK-ARNTL/BMAL1 heterodimers. Involved in heart and limb development by mediating acetylation of TBX5, acetylation regulating nucleocytoplasmic shuttling of TBX5. Acts as a negative regulator of centrosome amplification by mediating acetylation of PLK4. Acetylates RRP9/U3-55K, a core subunit of the U3 snoRNP complex, impairing pre-rRNA processing. Also acetylates spermidine. Interacts with BCAS3. Interacts with SIRT1. Interacts with EP300, CREBBP and DDX17. Component of a large chromatin remodeling complex, at least composed of MYSM1, KAT2B/PCAF, RBM10 and KIF11/TRIP5. Interacts with KLF1; the interaction does not acetylate KLF1 and there is no enhancement of its transactivational activity. Interacts with NFE4. Interacts with MECOM. Interacts with NR2C2 (hypophosphorylated and unsumoylated form); the interaction promotes the transactivation activity of NR2C2. Interacts with NFE4. Interacts with MECOM. Interacts with E2F1; the interaction acetylates E2F1 augmenting its DNA-binding and transcriptional activity. Interacts with NPAS2, ARNTL/BMAL1 and CLOCK (By similarity). Interacts (unsumoylated form) with NR2C1; the interaction promotes transactivation activity. Interacts with CEBPB (By similarity). Interacts with NR4A3 (PubMed:12709428). Interacts with TBX5 (By similarity). Interacts with PLK4 (By similarity). Interacts with RB1; this interaction leads to RB1 acetylation (PubMed:20940255).

EXTERNAL LINKS

Kat2b

Histone acetyltransferase KAT2B

Kat2b

Molecular Synopsis