ID   3.2.2.25
DE   N-methyl nucleosidase.
AN   7-methylxanthosine nucleosidase.
AN   methylpurine nucleosidase.
AN   N-MeNase.
AN   N-methyl nucleoside hydrolase.
CA   7-methylxanthosine + H2O = 7-methylxanthine + D-ribose + H(+).
CC   -!- Preferentially hydrolyzes 3- and 7-methylpurine nucleosides, such as
CC       3-methylxanthosine, 3-methyladenosine and 7-methylguanosine.
CC   -!- Hydrolysis of 7-methylxanthosine to form 7-methylxanthine is the
CC       second step in the caffeine biosynthesis pathway.
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