Acts as a negative regulator of the Wnt signaling pathway via its interaction with DVL1 (By similarity). Binds preferentially to DNA containing cytidine-phosphate-guanosine (CpG) dinucleotides over CpH (H=A, T, and C), hemimethylated-CpG and hemimethylated-hydroxymethyl-CpG (By similarity). Interacts with the PDZ domain of DVL1. Highest expression in cerebrum, cerebellum and heart, and lower expression in thymus and testis. The CXXC zinc finger mediates binding to CpG-DNA.