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Information on EC 2.1.1.63 - methylated-DNA-[protein]-cysteine S-methyltransferase

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EC Tree
IUBMB Comments
This protein is involved in the repair of methylated DNA. Unlike EC 3.2.2.20, DNA-3-methyladenine glycosidase I and EC 3.2.2.21, DNA-3-methyladenine glycosidase II, which remove the methylated base leaving an apurinic/apyrimidinic site, this enzyme transfers the methyl group from the methylated DNA to an internal cysteine residue, leaving an intact nucleotide. Since the methyl transfer is irreversible, the enzyme can only catalyse a single turnover.
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Word Map
The enzyme appears in viruses and cellular organisms
Synonyms
o6-methylguanine-dna methyltransferase, atase, o6-alkylguanine-dna alkyltransferase, ada protein, o6-methylguanine dna methyltransferase, o6-methylguanine-dna-methyltransferase, o6-methylguanine methyltransferase, o6-alkylguanine dna alkyltransferase, o6-mgmt, methylguanine dna methyltransferase, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
DNA (containing 4-O-methylthymine) + protein L-cysteine = DNA (without 4-O-methylthymine) + protein S-methyl-L-cysteine
show the reaction diagram
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DNA (containing 6-O-methylguanine) + protein L-cysteine = DNA (without 6-O-methylguanine) + protein S-methyl-L-cysteine
show the reaction diagram
(1)
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