Enables p53 binding activity. Acts upstream of or within negative regulation of cellular senescence and negative regulation of intrinsic apoptotic signaling pathway in response to DNA damage by p53 class mediator. Predicted to be located in nucleus. Is expressed in several structures, including adrenal gland; genitourinary system; gut; quadriceps femoris muscle; and respiratory system. Orthologous to human BCL2L12 (BCL2 like 12). [provided by Alliance of Genome Resources, Apr 2022]