Family

Histone-lysine N-methyltransferase, SET (IPR017155)

Short name: Hist-Lys_N-MeTrfase_SET

Family relationships

None.

Description

This entry represents histone-lysine N-methyltransferase (SETD7 or SET7/9) (EC:2.1.1.43), which contains a SET domain [PMID: 18391193]. This enzyme specifically monomethylate Lys-4 of histone H3, thereby creating a specific tag for epigenetic transcriptional activation. Methylation of lysine residues in the N-terminal tails of histones is thought to represent an important component of the mechanism that regulates chromatin structure. As such SETD7 plays a central role in the transcriptional activation of genes such as collagenase and insulin. It is recruited by IPF1/PDX-1 to the insulin promoter, leading to activate transcription. SETD7 also has methyltransferase activity toward non-histone proteins, including TAF10 and p53/TP53. SETD7 monomethylates Lys-189 of TAF10, which increases the affinity of TAF10 for RNA polymerase II. SETD7 monomethylates Lys-372 of p53/TP53, which stabilises p53/TP53 and increases p53/TP53-mediated transcriptional activation [PMID: 15525938].

These enzymes contain a SET domain, which is necessary but not sufficient for histone methyltransferase activity [PMID: 12389038]. Human SETD7 contains an N-terminal beta-sheet domain in addition to the conserved SET domain [PMID: 12514135]. Mutagenesis studies [PMID: 12372304] identified two residues in the C terminus of the protein that appear essential for catalytic activity toward lysine-4 of histone H3; cofactor AdoMet binds to this domain.

GO terms

Biological Process

GO:0034968 histone lysine methylation
GO:0006355 regulation of transcription, DNA-templated

Molecular Function

GO:0018024 histone-lysine N-methyltransferase activity

Cellular Component

GO:0005694 chromosome

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.
PROSITE profiles
PIRSF