SET domain found in SET domain-containing protein 8 (SETD8) and similar proteins
SETD8 (EC 2.1.1.43; also termed N-lysine methyltransferase KMT5A, H4-K20-HMTase KMT5A, lysine N-methyltransferase 5A, lysine-specific methylase 5A, PR/SET domain-containing protein 07, PR-Set7 or PR/SET07) is a nucleosomal histone-lysine N-methyltransferase that specifically monomethylates 'Lys-20' of histone H4 (H4K20me1). It plays a central role in the silencing of euchromatic genes.