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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. Inhibits cell-cycle progression and counteracts the mitogenic activity of the adenoviral oncoprotein E1A. 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. Acts as a circadian transcriptional coactivator which enhances the activity of the circadian transcriptional activators: NPAS2-ARNTL/BMAL1 and CLOCK-ARNTL/BMAL1 heterodimers.
Gene Name: | K(lysine) acetyltransferase 2B |
Synonyms: | KAT2B, CREBBP-associated factor, GCN5, Histone acetyltransferase PCAF, K(lysine) acetyltransferase 2B, Lysine acetyltransferase 2B, Histone acetylase PCAF, PCAF, p300/CBP-associated factor, CAF, GCN5L |
Target Sequences: | NM_003884 NP_003875.3 Q92831 |
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