N-lysine methyltransferase SETD8 - Q9NQR1 (SETD8_HUMAN)

 

Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for Q9NQR1: 8
 
Function
Protein-lysine N-methyltransferase that monomethylates both histones and non-histone proteins. Specifically monomethylates 'Lys-20' of histone H4 (H4K20me1). H4K20me1 is enriched during mitosis and represents a specific tag for epigenetic transcriptional repression. Mainly functions in euchromatin regions, thereby playing a central role in the silencing of euchromatic genes. Required for cell proliferation, probably by contributing to the maintenance of proper higher-order structure of DNA during mitosis. Involved in chromosome condensation and proper cytokinesis. Nucleosomes are preferred as substrate compared to free histones. Mediates monomethylation of p53/TP53 at 'Lys-382', leading to repress p53/TP53-target genes. Plays a negative role in TGF-beta response regulation and a positive role in cell migration. UniProt
Catalytic Activity
S-adenosyl-L-methionine + L-lysine-[histone] = S-adenosyl-L-homocysteine + N6-methyl-L-lysine-[histone]. UniProt
Pathway Maps
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Subunit Structure
Interacts with L3MBTL1. Isoform 2 interacts with SIRT2 (phosphorylated form); the interaction is direct, stimulates KMT5A-mediated methyltransferase activity at histone H4 'Lys-20' (H4K20me1) and is increased in a H(2)O(2)-induced oxidative stress-dependent manner. UniProt
Domain
Although the SET domain contains the active site of enzymatic activity, both sequences upstream and downstream of the SET domain are required for methyltransferase activity. UniProt
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