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EC 1.14.11.69 Details
EC number
1.14.11.69
Accepted name
[histone H3]-trimethyl-L-lysine36 demethylase
Reaction
a [histone H3]-N6,N6,N6-trimethyl-L-lysine36 + 2 2-oxoglutarate + 2 O2 = a [histone H3]-N6-methyl-L-lysine36 + 2 succinate + 2 formaldehyde + 2 CO2 (overall reaction);;(1a) a [histone H3]-N6,N6,N6-trimethyl-L-lysine36 + 2-oxoglutarate + O2 = a [histone H3]-N6,N6-dimethyl-L-lysine36 + succinate + formaldehyde + CO2;;(1b) a [histone H3]-N6,N6-dimethyl-L-lysine36 + 2-oxoglutarate + O2 = a [histone H3]-N6-methyl-L-lysine36 + succinate + formaldehyde + CO2
Other name(s)
KDM4A (gene name), KDM4B (gene name), RPH1 (gene name), JHDM3A (gene name), JHDM3B (gene name), JMJD2A (gene name), JMJD2B (gene name)
Systematic name
[histone H3]-N6,N6,N6-trimethyl-L-lysine36,2-oxoglutarate:oxygen oxidoreductase
Comment
Requires iron(II). This entry describes a group of enzymes that demethylate N-methylated Lys36 residues in the tail of the histone protein H3 (H3K36). This lysine residue can exist in three methylation states (mono-, di- and trimethylated), but this group of enzymes only act on the the tri- and di-methylated forms. The enzymes are dioxygenases and act by hydroxylating the methyl group, forming an unstable hemiaminal that leaves as formaldehyde. Since trimethylation of H3K36 enhances transcription, this enzyme acts as a transcription repressor. The enzymes that possess this activity often also catalyse the activity of EC 1.14.11.66, [histone H3]-trimethyl-L-lysine9 demethylase. cf. EC 1.14.11.27, [histone H3]-dimethyl-L-lysine36 demethylase.
History
created 2019
EC Tree
3.1.1.9 created 1961, deleted 1972
3.1.1.12 created 1961, deleted 1972
3.1.1.16 created 1961, deleted 1972
3.1.1.18 created 1961, deleted 1982
3.1.1.62 created 1989, deleted 1992
3.1.1.69 created 1992, deleted 2002