Sequences in this family bear similarity to the central region of PLU-1 (Swiss:Q9Y3Q5). This is a nuclear protein that may have a role in DNA-binding and transcription, and is closely associated with the malignant phenotype of breast cancer [1]. This region is found in various other Jumonji/ARID domain-containing proteins (see Pfam:PF02373, Pfam:PF01388).

1: A novel gene (PLU-1) containing highly conserved putative DNA/chromatin binding motifs is specifically up-regulated in breast cancer. Lu PJ, Sundquist K, Baeckstrom D, Poulsom R, Hanby A, Meier-Ewert S, Jones T, Mitchell M, Pitha-Rowe P, Freemont P, Taylor-Papadimitriou J; J Biol Chem 1999;274:15633-15645. PMID:10336460