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Literature summary for 2.1.1.75 extracted from

  • Kuroki, G.; Poulton, J.E.
    The para-O-methylation of apigenin to acacetin by cell-free extracts of Robinia pseudoacacia L. (1981), Z. Naturforsch. C, 36c, 916-920.
No PubMed abstract available

Activating Compound

Activating Compound Comment Organism Structure
2-mercaptoethanol 5 mM, required for optimum activity Robinia pseudoacacia

Inhibitors

Inhibitors Comment Organism Structure
S-adenosyl-L-homocysteine 0.1 mM, 47% inhibition Robinia pseudoacacia

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.031
-
S-adenosyl-L-methionine
-
Robinia pseudoacacia
0.05
-
apigenin
-
Robinia pseudoacacia

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
S-adenosyl-L-methionine + 5,7,4'-trihydroxyflavone Robinia pseudoacacia enzyme is involved in biosynthesis of 4'-methoxylated flavonoids S-adenosyl-L-homocysteine + 4'-methoxy-5,7-dihydroxyflavone
-
?

Organism

Organism UniProt Comment Textmining
Robinia pseudoacacia
-
-
-

Source Tissue

Source Tissue Comment Organism Textmining
callus
-
Robinia pseudoacacia
-
seedling
-
Robinia pseudoacacia
-
shoot
-
Robinia pseudoacacia
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
S-adenosyl-L-methionine + 5,7,4'-trihydroxyflavone i.e. apigenin Robinia pseudoacacia S-adenosyl-L-homocysteine + 4'-methoxy-5,7-dihydroxyflavone i.e. acacetin ?
S-adenosyl-L-methionine + 5,7,4'-trihydroxyflavone enzyme is involved in biosynthesis of 4'-methoxylated flavonoids Robinia pseudoacacia S-adenosyl-L-homocysteine + 4'-methoxy-5,7-dihydroxyflavone
-
?

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
9
-
glycine-NaOH buffer Robinia pseudoacacia

pH Range

pH Minimum pH Maximum Comment Organism
7.5 10 about 50% of activity maximum at pH 7.5 and 10, glycine-NaOH buffer Robinia pseudoacacia