This domain is often found in the N-terminal region of proteins carrying the SET domain (Pfam:PF00856), 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 [1].

1: SETDB1 plays an essential role in maintenance of gonocyte survival in pigs. Liu T, Zhang P, Li T, Chen X, Zhu Z, Lyu Y, Li X, Tian X, Zeng W; Reproduction. 2017;154:23-34. PMID:28420800