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Histone methyltransferase that specifically trimethylates 'Lys-9' of histone H3. H3 'Lys-9' trimethylation represents a specific tag for epigenetic transcriptional repression by recruiting HP1 (CBX1, CBX3 and/or CBX5) proteins to methylated histones. Mainly functions in euchromatin regions, thereby playing a central role in the silencing of euchromatic genes. H3 'Lys-9' trimethylation is coordinated with DNA methylation. Probably forms a complex with MBD1 and ATF7IP that represses transcription and couples DNA methylation and histone 'Lys-9' trimethylation. Its activity is dependent on MBD1 and is heritably maintained through DNA replication by being recruited by CAF-1. SETDB1 is targeted to histone H3 by TRIM28/TIF1B, a factor recruited by KRAB zinc-finger proteins.
Gene Name: | SET domain, bifurcated 1 |
Synonyms: | SETDB1, H3-K9-HMTase4, ESET, KMT1E, H3-K9-HMTase 4, KG1T, SET domain, bifurcated 1, SET domain bifurcated 1, KIAA0067, Lysine N-methyltransferase 1E |
Target Sequences: | NM_012432 NP_036564.3 Q15047 |
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