“Theobromine synthase”的意思、由来-开放百科全书

词条

Theobromine synthase

释义

References

{{enzyme
| Name = Theobromine synthase
| EC_number = 2.1.1.159
| CAS_number =
| IUBMB_EC_number = 2/1/1/159
| GO_code =
| image =
| width =
| caption =
}}

In enzymology, a theobromine synthase ({{EC number|2.1.1.159}}) is an enzyme that catalyzes the chemical reaction

S-adenosyl-L-methionine + 7-methylxanthine S-adenosyl-L-homocysteine + 3,7-dimethylxanthine

Thus, the two substrates of this enzyme are S-adenosyl methionine and 7-methylxanthine, whereas its two products are S-adenosylhomocysteine and 3,7-dimethylxanthine.

This enzyme belongs to the family of transferases, specifically those transferring one-carbon group methyltransferases. The systematic name of this enzyme class is S-adenosyl-L-methionine:7-methylxanthine N3-methyltransferase. Other names in common use include monomethylxanthine methyltransferase, MXMT, CTS1, CTS2, and S-adenosyl-L-methionine:7-methylxanthine 3-N-methyltransferase.

References

{{cite journal | vauthors = Ogawa M, Herai Y, Koizumi N, Kusano T, Sano H | date = 2001 | title = 7-Methylxanthine methyltransferase of coffee plants. Gene isolation and enzymatic properties | journal = J. Biol. Chem. | volume = 276 | pages = 8213–8 | pmid = 11108716 | doi = 10.1074/jbc.M009480200 | issue = 11 }}
{{cite journal | vauthors = Uefuji H, Ogita S, Yamaguchi Y, Koizumi N, Sano H | date = 2003 | title = Molecular cloning and functional characterization of three distinct N-methyltransferases involved in the caffeine biosynthetic pathway in coffee plants | journal = Plant Physiol. | volume = 132 | pages = 372–80 | pmid = 12746542 | doi = 10.1104/pp.102.019679 | issue = 1 | pmc = 166982 }}
{{cite journal | vauthors = Yoneyama N, Morimoto H, Ye CX, Ashihara H, Mizuno K, Kato M | date = 2006 | title = Substrate specificity of N-methyltransferase involved in purine alkaloids synthesis is dependent upon one amino acid residue of the enzyme | journal = Mol. Genet. Genomics. | volume = 275 | pages = 125–35 | pmid = 16333668 | doi = 10.1007/s00438-005-0070-z | issue = 2 }}

2 : EC 2.1.1|Enzymes of unknown structure

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