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Information on EC 1.14.11.69 - [histone H3]-trimethyl-L-lysine36 demethylase

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IUBMB Comments
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.
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Word Map
The enzyme appears in viruses and cellular organisms
Synonyms
jmjc protein, jmjc demethylase, histone h3k36 demethylase, jmjd-2, h3k36 histone demethylase, rph1/kdm4, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
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
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overall reaction
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a [histone H3]-N6,N6,N6-trimethyl-L-lysine36 + 2-oxoglutarate + O2 = a [histone H3]-N6,N6-dimethyl-L-lysine36 + succinate + formaldehyde + CO2
show the reaction diagram
(1a)
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a [histone H3]-N6,N6-dimethyl-L-lysine36 + 2-oxoglutarate + O2 = a [histone H3]-N6-methyl-L-lysine36 + succinate + formaldehyde + CO2
show the reaction diagram
(1b)
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