7-methylxanthosine synthase EC#: 2.1.1.158; ChemWhat Code: 1376359
| Product Name | 7-methylxanthosine synthase |
| Example Structure |  |
| Synonyms | 7-methylxanthine 3-N-methyltransferase, 7-methylxanthine synthase, 7-methylxanthosine synthase, 7-methylxanthosine synthase 1, 7-N-methyltransferase, 7NMT, CmXRS1, N-methyltransferase, SAM:xanthosine 7-N-methyltransferase, xanthosine methyltransferase, xanthosine-N7-methyltransferase, xanthosine:S-adenosyl-L-methionine methyltransferase, XMT, XMT1, XRS1 |
| EC Number | 2.1.1.158 |
| CAS Registry Number | |
| Comments | The enzyme is specific for xanthosine, as XMP and xanthine cannot act as substrates [2,4]. The enzyme does not have N1- or N3- methylation activity [2]. This is the first methylation step in the production of caffeine. |
| Cofactor | |
| History | |
| Reactions | S-adenosyl-L-methionine + xanthosine = S-adenosyl-L-homocysteine + 7-methylxanthosine. |
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