FEATURES

FAMILY

DESCRIPTION

Also known as KAT2B_HUMAN, KAT2B, PCAF. Functions as a histone acetyltransferase (HAT) to promote transcriptional activation (PubMed:8945521). Has significant histone acetyltransferase activity with core histones (H3 and H4), and also with nucleosome core particles (PubMed:8945521). Also acetylates non-histone proteins, such as ACLY, PLK4, RRP9/U3-55K and TBX5 (PubMed:9707565, PubMed:10675335, PubMed:27796307, PubMed:23932781, PubMed:26867678, PubMed:29174768). Inhibits cell-cycle progression and counteracts the mitogenic activity of the adenoviral oncoprotein E1A (PubMed:8684459). Acts as a circadian transcriptional coactivator which enhances the activity of the circadian transcriptional activators: NPAS2-ARNTL/BMAL1 and CLOCK-ARNTL/BMAL1 heterodimers (PubMed:14645221). Involved in heart and limb development by mediating acetylation of TBX5, acetylation regulating nucleocytoplasmic shuttling of TBX5 (PubMed:29174768). Acts as a negative regulator of centrosome amplification by mediating acetylation of PLK4 (PubMed:27796307). Acetylates RRP9/U3-55K, a core subunit of the U3 snoRNP complex, impairing pre-rRNA processing (PubMed:26867678). Also acetylates spermidine (PubMed:27389534)., (Microbial infection) In case of HIV-1 infection, it is recruited by the viral protein Tat. Regulates Tat's transactivating activity and may help inducing chromatin remodeling of proviral genes. Interacts with SIRT1. Interacts (unsumoylated form) with NR2C1; the interaction promotes transactivation activity (By similarity). Interacts with EP300, CREBBP and DDX17. Interacts with NCOA1 and NCOA3. Component of a large chromatin remodeling complex, at least composed of MYSM1, KAT2B/PCAF, RBM10 and KIF11/TRIP5. Interacts with NR2C2 (hypophosphorylated and unsumoylated form); the interaction promotes the transactivation activity of NR2C2. 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 E2F1; the interaction acetylates E2F1 augmenting its DNA-binding and transcriptional activity. Interacts with NPAS2, ARNTL/BMAL1 and CLOCK. Interacts with BCAS3. Interacts with CEBPB (PubMed:17301242). Interacts with NR4A3 (By similarity). Interacts with NFATC2 (By similarity). Interacts with TBX5 (PubMed:29174768). Interacts with PLK4 (PubMed:27796307). Interacts with RB1; this interaction leads to RB1 acetylation (By similarity).

EXTERNAL LINKS

KAT2B

Histone acetyltransferase KAT2B

KAT2B

Molecular Synopsis