Acetyltransferase enzyme (By similarity). Acetylates histones, giving a specific tag for transcriptional activation (By similarity). May prevent DNA damage-induced apoptosis by inhibiting cep-1-dependent transcription activation of the programmed cell death activator egl-1 (PubMed:19521535). In differentiated cells, negatively regulates localization of heterochromatin to the nuclear periphery (PubMed:31118512). Plays a role in migration of gonadal distal tip cells, where it probably modulates expression of genes involved in integrin-mediated adhesion (PubMed:24811939). acetyl-CoA + L-lysyl-[protein] = CoA + H(+) + N(6)-acetyl-L-lysyl-[protein] Interacts (via N-terminus domain and HAT domain) with prmt-5; the interaction results in methylation of cbp-1 (PubMed:19521535). Interacts (via HAT domain) with cep-1; cep-1 transcriptional activity may be inhibited by interaction with methylated cbp-1 (PubMed:19521535). Component of a complex that contains prmt-5 and cbp-1 (PubMed:19521535). Expressed in the gonadal distal tip cells (DTC) during larval stages L2, L3 and L4. Methylation by prmt-5 may repress the capacity of cbp-1 to enhance cep-1-dependent transcription of egl-1. RNAi-mediated knockdown targeted to the gonadal distal tip cells (DTC) causes DTC migration defects (PubMed:24811939). Significant reduction in expression of src-1, tln-1 and nmy-2 in DTCs (PubMed:24811939). RNAi-mediated knockdown on an mrg-1;cec-4 double mutant background restores positioning of heterochromatin to the nuclear periphery (PubMed:31118512).