Histone-lysine N-methyltransferase SUV420H1 is an enzyme that in humans is encoded by the SUV420H1gene.[1][2][3] The enzyme along with WHSC1 is responsible for dimethylation of lysine 20 on histone 4 in mouse and humans.[4][5]
This gene encodes a protein that contains a SET domain. SET domains appear to be protein-protein interaction domains that mediate interactions with a family of proteins that display similarity with dual-specificity phosphatases (dsPTPases). The function of this gene has not been determined. Two alternatively spliced transcript variants have been found for this gene.[3]
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Tryndyak VP, Kovalchuk O, Pogribny IP (2006). "Loss of DNA methylation and histone H4 lysine 20 trimethylation in human breast cancer cells is associated with aberrant expression of DNA methyltransferase 1, Suv4-20h2 histone methyltransferase and methyl-binding proteins". Cancer Biol. Ther. 5 (1): 65–70. doi:10.4161/cbt.5.1.2288. PMID16322686.