The Enzyme Database

Your query returned 1 entry.    printer_iconPrintable version

EC 2.1.1.84     
Accepted name: methylquercetagetin 6-O-methyltransferase
Reaction: S-adenosyl-L-methionine + 5,6,3′,4′-tetrahydroxy-3,7-dimethoxyflavone = S-adenosyl-L-homocysteine + 5,3′,4′-trihydroxy-3,6,7-trimethoxyflavone
Other name(s): flavonol 6-O-methyltransferase; flavonol 6-methyltransferase; 6-OMT; S-adenosyl-L-methionine:3′,4′,5,6-tetrahydroxy-3,7-dimethoxyflavone 6-O-methyltransferase
Systematic name: S-adenosyl-L-methionine:5,6,3′,4′-tetrahydroxy-3,7-dimethoxyflavone 6-O-methyltransferase
Comments: The enzymes from Chrysosplenium americanum also methylates 3,7,3′-trimethylquercetagetin at the 6-position. Does not act on flavones, dihydroflavonols, or their glucosides.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number: 97089-68-4
References:
1.  De Luca, V. and Ibrahim, R.K. Enzymatic synthesis of polymethylated flavonols in Chrysosplenium americanum. I. Partial purification and some properties of S-adenosyl-L-methionine:flavonol 3-, 6-, 7-, and 4′-O-methyltransferases. Arch. Biochem. Biophys. 238 (1985) 596–605. [PMID: 3994393]
2.  De Luca, V. and Ibrahim, R.K. Enzymatic synthesis of polymethylated flavonols in Chrysosplenium americanum. II. Substrate interaction and product inhibition studies of flavonol 3-, 6-, and 4′-O-methyltransferases. Arch. Biochem. Biophys. 238 (1985) 606–618. [PMID: 3994394]
[EC 2.1.1.84 created 1989]
 
 


Data © 2001–2017 IUBMB
Web site © 2005–2017 Andrew McDonald