cbp-1 encodes a homolog of the mammalian transcriptional cofactors CBP that have been shown to possess histone acetyltransferase activity, and which, when mutated, lead to Rubinstein-Taybi syndrome and colorectal cancer in human; CBP-1 is required during embryogenesis for differentiation of all non-neuronal somatic cell types; isolated from Caenorhabditis elegans; amino acid sequence in first source