该基因编码腺病毒E1A相关的细胞p300转录辅激活蛋白。作为组蛋白乙酰转移酶，通过染色质重塑调节转录，在细胞增殖和分化过程中起重要作用。通过与磷酸化CREB蛋白特异性结合来介导cAMP基因调控。该基因也被鉴定为HIF1A（缺氧诱导因子1α）的共激活物，因此在缺氧诱导基因如VEGF的刺激中起到作用。这种基因的缺陷是鲁宾斯坦-泰比综合征的原因，也可能在上皮癌中起作用。
This gene encodes the adenovirus E1A-associated cellular p300 transcriptional co-activator protein. It functions as histone acetyltransferase that regulates transcription via chromatin remodeling and is important in the processes of cell proliferation and differentiation. It mediates cAMP-gene regulation by binding specifically to phosphorylated CREB protein. This gene has also been identified as a co-activator of HIF1A (hypoxia-inducible factor 1 alpha), and thus plays a role in the stimulation of hypoxia-induced genes such as VEGF. Defects in this gene are a cause of Rubinstein-Taybi syndrome and may also play a role in epithelial cancer.