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Literature summary extracted from

  • Vance, C.P.; Bryan, J.W.
    Purification and properties of caffeic acid O-methyltransferase from alfalfa root nodules (1981), Phytochemistry, 20, 41-43.
No PubMed abstract available

Inhibitors

EC Number Inhibitors Comment Organism Structure
2.1.1.68 S-adenosyl-L-homocysteine strong, product inhibition, competitive Medicago sativa

KM Value [mM]

EC Number KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
2.1.1.68 0.0041
-
S-adenosyl-L-methionine
-
Medicago sativa
2.1.1.68 0.058
-
caffeic acid
-
Medicago sativa

Molecular Weight [Da]

EC Number Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
2.1.1.68 103000
-
gel filtration Medicago sativa

Natural Substrates/ Products (Substrates)

EC Number Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
2.1.1.68 S-adenosyl-L-methionine + 3,4-dihydroxy-trans-cinnamate Medicago sativa i.e. caffeic acid, involved in the biosynthesis of lignin S-adenosyl-L-homocysteine + 3-methoxy-4-hydroxy-trans-cinnamate
-
?
2.1.1.68 S-adenosyl-L-methionine + 3,4-dihydroxy-trans-cinnamate Medicago sativa Saranac i.e. caffeic acid, involved in the biosynthesis of lignin S-adenosyl-L-homocysteine + 3-methoxy-4-hydroxy-trans-cinnamate
-
?

Organism

EC Number Organism UniProt Comment Textmining
2.1.1.68 Medicago sativa
-
alfalfa
-
2.1.1.68 Medicago sativa Saranac
-
alfalfa
-

Purification (Commentary)

EC Number Purification (Comment) Organism
2.1.1.68 affinity chromatography Medicago sativa

Source Tissue

EC Number Source Tissue Comment Organism Textmining
2.1.1.68 root nodule
-
Medicago sativa
-

Specific Activity [micromol/min/mg]

EC Number Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
2.1.1.68 0.017
-
-
Medicago sativa

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
2.1.1.68 S-adenosyl-L-methionine + 3,4-dihydroxy-trans-cinnamate
-
Medicago sativa S-adenosyl-L-homocysteine + 3-methoxy-4-hydroxy-trans-cinnamate i.e. ferulate ?
2.1.1.68 S-adenosyl-L-methionine + 3,4-dihydroxy-trans-cinnamate i.e. caffeic acid, involved in the biosynthesis of lignin Medicago sativa S-adenosyl-L-homocysteine + 3-methoxy-4-hydroxy-trans-cinnamate
-
?
2.1.1.68 S-adenosyl-L-methionine + 3,4-dihydroxy-trans-cinnamate
-
Medicago sativa Saranac S-adenosyl-L-homocysteine + 3-methoxy-4-hydroxy-trans-cinnamate i.e. ferulate ?
2.1.1.68 S-adenosyl-L-methionine + 3,4-dihydroxy-trans-cinnamate i.e. caffeic acid, involved in the biosynthesis of lignin Medicago sativa Saranac S-adenosyl-L-homocysteine + 3-methoxy-4-hydroxy-trans-cinnamate
-
?
2.1.1.68 S-adenosyl-L-methionine + 5-hydroxyferulic acid at 70% the rate of caffeic acid methylation Medicago sativa S-adenosyl-L-homocysteine + sinapic acid
-
?
2.1.1.68 S-adenosyl-L-methionine + 5-hydroxyferulic acid at 70% the rate of caffeic acid methylation Medicago sativa Saranac S-adenosyl-L-homocysteine + sinapic acid
-
?
2.1.1.68 S-adenosyl-L-methionine + daidzein poor substrate Medicago sativa ?
-
?
2.1.1.68 S-adenosyl-L-methionine + daidzein poor substrate Medicago sativa Saranac ?
-
?
2.1.1.68 S-adenosyl-L-methionine + genistein poor substrate Medicago sativa ?
-
?
2.1.1.68 S-adenosyl-L-methionine + protocatechuic acid poor substrate Medicago sativa S-adenosyl-L-homocysteine + 4-hydroxy-3-methoxybenzoate
-
?
2.1.1.68 S-adenosyl-L-methionine + protocatechuic acid poor substrate Medicago sativa Saranac S-adenosyl-L-homocysteine + 4-hydroxy-3-methoxybenzoate
-
?
2.1.1.68 S-adenosyl-L-methionine + pyrogallol poor substrate Medicago sativa ?
-
?

pH Optimum

EC Number pH Optimum Minimum pH Optimum Maximum Comment Organism
2.1.1.68 7
-
around Medicago sativa

pH Range

EC Number pH Minimum pH Maximum Comment Organism
2.1.1.68 6.5 8 more than half-maximal activity at pH 6.5 and 8.0 Medicago sativa

Ki Value [mM]

EC Number Ki Value [mM] Ki Value maximum [mM] Inhibitor Comment Organism Structure
2.1.1.68 0.00044
-
S-adenosyl-L-homocysteine
-
Medicago sativa