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Literature summary for 2.4.1.203 extracted from

  • Dixon, S.C.; Martin, R.C.; Mok, M.C.; Shaw, G.; Mok, D.W.S.
    Zeatin glycosylation enzymes in Phaseolus - isolation of O-glucosyltransferase from Phaseolus lunatus and comparison to O-xylosyltransferase from P. vulgaris (1989), Plant Physiol., 90, 1316-1321.
    View publication on PubMedView publication on EuropePMC

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.028
-
trans-zeatin
-
Phaseolus lunatus
0.216
-
UDP-glucose
-
Phaseolus lunatus
2.7
-
UDP-xylose
-
Phaseolus lunatus

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
44000
-
gel filtration Phaseolus lunatus

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
UDP-glucose + zeatin Phaseolus lunatus important in regulating the level of active cytokinin, i.e. zeatin, in plant tissues UDP + O-beta-D-glucosyl-trans-zeatin
-
?

Organism

Organism UniProt Comment Textmining
no activity in Phaseolus vulgaris
-
-
-
Phaseolus lunatus
-
cv. Kingston
-

Purification (Commentary)

Purification (Comment) Organism
-
Phaseolus lunatus

Source Tissue

Source Tissue Comment Organism Textmining
embryo immature Phaseolus lunatus
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
0.57
-
purified enzyme Phaseolus lunatus

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
UDP-galactose + trans-zeatin
-
Phaseolus lunatus UDP + O-galactosylzeatin
-
?
UDP-glucose + trans-zeatin cis-zeatin, ribosylzeatin, and dihydrozeatin are no substrates Phaseolus lunatus UDP + O-beta-D-glucosyl-trans-zeatin
-
?
UDP-glucose + trans-zeatin specific for trans-zeatin Phaseolus lunatus UDP + O-beta-D-glucosyl-trans-zeatin
-
?
UDP-glucose + zeatin important in regulating the level of active cytokinin, i.e. zeatin, in plant tissues Phaseolus lunatus UDP + O-beta-D-glucosyl-trans-zeatin
-
?
UDP-xylose + trans-zeatin
-
Phaseolus lunatus UDP + O-xylosylzeatin
-
?

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
27
-
assay at Phaseolus lunatus

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
8
-
-
Phaseolus lunatus