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Literature summary extracted from

  • Ibrahim, R.K.; De Luca, V.
    Polymethylated flavonol synthesis is catalysed by distinct O-methyltranferases (1982), Naturwissenschaften, 69, 41-42.
No PubMed abstract available

KM Value [mM]

EC Number KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
2.1.1.76 0.0014
-
 quercetin
-
 Chrysosplenium americanum
2.1.1.76 0.07
-
 S-adenosyl-L-methionine
-
 Chrysosplenium americanum

Metals/Ions

EC Number Metals/Ions Comment Organism Structure
2.1.1.76 Mg2+ required for activity Chrysosplenium americanum

Molecular Weight [Da]

EC Number Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
2.1.1.76 65000
-
 gel filtration Chrysosplenium americanum

Natural Substrates/ Products (Substrates)

EC Number Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
2.1.1.76 S-adenosyl-L-methionine + 3,5,7,3',4'-pentahydroxyflavone Chrysosplenium americanum involved in metabolism of secondary plant products, especially formation of lignin and detoxification of flavonoids S-adenosyl-L-homocysteine + 3-methoxy-5,7,3',4'-tetrahydroxyflavone 3-O-methylquercetin ?

Organism

EC Number Organism UniProt Comment Textmining
2.1.1.76 Chrysosplenium americanum
-
-
-

Purification (Commentary)

EC Number Purification (Comment) Organism
2.1.1.76 partially Chrysosplenium americanum

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
2.1.1.76 S-adenosyl-L-methionine + 3,5,7,3',4'-pentahydroxyflavone
-
 Chrysosplenium americanum S-adenosyl-L-homocysteine + 3-methoxy-5,7,3',4'-tetrahydroxyflavone
-
 ?
2.1.1.76 S-adenosyl-L-methionine + 3,5,7,3',4'-pentahydroxyflavone involved in metabolism of secondary plant products, especially formation of lignin and detoxification of flavonoids Chrysosplenium americanum S-adenosyl-L-homocysteine + 3-methoxy-5,7,3',4'-tetrahydroxyflavone 3-O-methylquercetin ?

Synonyms

EC Number Synonyms Comment Organism
2.1.1.76 S-adenosyl-L-methionine:quercetin 3-O-methyltransferase
-
 Chrysosplenium americanum

pH Optimum

EC Number pH Optimum Minimum pH Optimum Maximum Comment Organism
2.1.1.76 7.5 8.5
-
 Chrysosplenium americanum