Substrate-recognition component of the SCF (SKP1-CUL1-F-box protein)-type E3 ubiquitin ligase complex (By similarity). Binds to DNA containing unmethylated cytidine-phosphate-guanosine (CpG) dinucleotides (PubMed:29276034). Directly interacts with SKP1 and CUL1. The CXXC zinc finger mediates binding to DNA containing unmethylated cytidine-phosphate-guanosine (CpG) dinucleotides. It is uncertain whether Met-1 or Met-21 is the initiator. Truncated N-terminus. Truncated N-terminus.