The Enzyme Database

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Accepted name: emodin O-methyltransferase
Reaction: S-adenosyl-L-methionine + emodin = S-adenosyl-L-homocysteine + questin
Glossary: emodin = 1,3,8-trihydroxy-6-methyl-9,10-anthraquinone
questin = 1,6-dihydroxy-8-methoxy-3-methyl-9,10-anthraquinone
Other name(s): EOMT
Systematic name: S-adenosyl-L-methionine:emodin 8-O-methyltransferase
Comments: The enzyme is involved in biosynthesis of the seco-anthraquinone (+)-geodin.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc
1.  Chen, Z.G., Fujii, I., Ebizuka, Y. and Sankawa, U. Emodin O-methyltransferase from Aspergillus terreus. Arch. Microbiol. 158 (1992) 29–34. [PMID: 1444712]
[EC created 2013]
Accepted name: hydroxyanthraquinone glucosyltransferase
Reaction: UDP-glucose + an hydroxyanthraquinone = UDP + a glucosyloxyanthraquinone
Other name(s): uridine diphosphoglucose-anthraquinone glucosyltransferase; anthraquinone-specific glucosyltransferase
Systematic name: UDP-glucose:hydroxyanthraquinone O-glucosyltransferase
Comments: A range of anthraquinones and some flavones can act as acceptors; best substrates are emodin, anthrapurpurin, quinizarin, 2,6-dihydroanthraquinone and 1,8-dihydroxyanthraquinone.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number: 112198-78-4
1.  Khouri, H.E. and Ibrahim, R.K. Purification and some properties of five anthraquinone-specific glucosyltransferases from Cinchona succiruba cell suspension culture. Phytochemistry 26 (1987) 2531–2535.
[EC created 1990]

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