This domain is often found in the N-terminal region of proteins carrying the SET domain (pfam00856), such as the SETDB1 protein present in Homo sapiens. SETDB1 is a histone methyltransferase that suppresses gene expression and modulates heterochromatin formation through H3K9me2/3.
Jiyao W et al.(2023). "The conserved domain database in 2023.",