Protein
Monomethylxanthine methyltransferase 1
Function
Involved in the biosynthesis of caffeine. Catalyzes the conversion of 7-methylxanthine (7mX) to theobromine and of paraxanthine to caffeine. Has a 5-fold preference for 7mX.
Similarity
Belongs to the methyltransferase superfamily. Type-7 methyltransferase family.
Sequence
MELQEVLHMNEGEGDTSYAKNASYNLALAKVKPFLEQCIRELLRANLPNINKCIKVADLGCASGPNTLLTVRDIVQSIDKVGQEEKNELERPTIQIFLNDLFQNDFNSVFKLLPSFYRKLEKENGRKIGSCLISAMPGSFYGRLFPEESMHFLHSCYSVHWLSQVPSGLVIELGIGANKGSIYSSKGCRPPVQKAYLDQFTKDFTTFLRIHSKELFSRGRMLLTCICKVDEFDEPNPLDLLDMAINDLIVEGLLEEEKLDSFNIPFFTPSAEEVKCIVEEEGSCEILYLETFKAHYDAAFSIDDDYPVRSHEQIKAEYVASLIRSVYEPILASHFGEAIMPDLFHRLAKHAAKVLHMGKGCYNNLIISLAKKPEKSDV