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Literature summary for 2.4.1.234 extracted from

  • Taylor, L.P.; Strenge, D.; Miller, K.D.
    The role of glycosylation in flavonol-induced pollen germination (1998), Adv. Exp. Med. Biol., 439, 35-44.
    View publication on PubMed

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.011
-
kaempferol forward reaction Petunia sp.
0.013
-
UDP cosubstrate kaempferol 3-O-beta-D-galactoside, reverse reaction Petunia sp.
0.039
-
kaempferol 3-O-beta-D-galactoside reverse reaction Petunia sp.
0.318
-
UDP-galactose cosubstrate kaempferol, forward reaction Petunia sp.

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
UDP-D-galactose + quercetin Petunia sp. role in pollen germination UDP + quercetin 3-O-beta-D-galactoside quercetin 3-O-beta-D-galactoside induces pollen germination via the reverse activity r
UDP-galactose + flavonol Petunia sp. F3GalTase controls the formation of glycosylated flavonols in pollen, enzyme also catalzes the reverse reaction, i.e the production of flavonol aglycone from the galactoside and UDP, and has therefore the potential to control the level of the bioactive flavonol species and as a result, pollen germination, the direction of the reaction could be controlled in vivo by localized hydronium ion changes, control mechanisms of the reversible reaction UDP + flavonol 3-O-beta-D-galactoside
-
r
UDP-galactose + kaempferol Petunia sp. role in pollen germination, the direction of the reaction could be controlled in vivo by localized hydronium ion changes UDP + kaempferol 3-O-beta-D-galactoside kaempferol 3-O-beta-D-galactoside induces pollen germination via the reverse activity r

Organism

Organism UniProt Comment Textmining
Petunia sp.
-
-
-

Purification (Commentary)

Purification (Comment) Organism
-
Petunia sp.

Source Tissue

Source Tissue Comment Organism Textmining
pollen surface localized Petunia sp.
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
additional information not: UDP-glucose Petunia sp. ?
-
?
UDP-D-galactose + quercetin
-
Petunia sp. UDP + quercetin 3-O-beta-D-galactoside
-
r
UDP-D-galactose + quercetin role in pollen germination Petunia sp. UDP + quercetin 3-O-beta-D-galactoside quercetin 3-O-beta-D-galactoside induces pollen germination via the reverse activity r
UDP-galactose + flavonol F3GalTase controls the formation of glycosylated flavonols in pollen, enzyme also catalzes the reverse reaction, i.e the production of flavonol aglycone from the galactoside and UDP, and has therefore the potential to control the level of the bioactive flavonol species and as a result, pollen germination, the direction of the reaction could be controlled in vivo by localized hydronium ion changes, control mechanisms of the reversible reaction Petunia sp. UDP + flavonol 3-O-beta-D-galactoside
-
r
UDP-galactose + flavonol absolute requirement for UDP-galactose Petunia sp. UDP + flavonol 3-O-beta-D-galactoside
-
r
UDP-galactose + kaempferol
-
Petunia sp. UDP + kaempferol 3-O-beta-D-galactoside
-
r
UDP-galactose + kaempferol role in pollen germination, the direction of the reaction could be controlled in vivo by localized hydronium ion changes Petunia sp. UDP + kaempferol 3-O-beta-D-galactoside kaempferol 3-O-beta-D-galactoside induces pollen germination via the reverse activity r

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
5.5
-
reverse reaction Petunia sp.
7.5
-
forward reaction Petunia sp.

pH Range

pH Minimum pH Maximum Comment Organism
5.5 7.5 the activity of the forward reaction is 1.6fold higher at pH 7.5 than at 5.5, the activity of the reverse reaction is 8fold higher at pH 5.5 than at 7.5 Petunia sp.