CREBBP is a symbol for the gene, CREB binding protein, in humans. Other names include: CREB-binding protein; CREB-binding protein ; CBP; KAT3A; RSTS. The encoded protein is an enzyme with an amino acid length of 2442 and a mass of 265.4 kDa. Other isoforms may exist. This gene shares homology with other species, including: Mouse, Rat, Frog, Chicken.