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Literature summary for 2.7.7.9 extracted from

  • Elling, L.
    Kinetic characterization of UDP-glucose pyrophosphorylase from germinated barley (malt) (1996), Phytochemistry, 42, 955-960.
No PubMed abstract available

Application

Application Comment Organism
synthesis easy available enzyme can be used for synthesis of nucleotide sugars in enzymic glycoconjugate synthesis Hordeum vulgare subsp. vulgare

Inhibitors

Inhibitors Comment Organism Structure
diphosphate noncompetitive to glucose 1-phosphate and UTP Hordeum vulgare subsp. vulgare
phosphate noncompetitive to glucose 1-phosphate and UTP Hordeum vulgare subsp. vulgare
UDP-glucose competitive to UTP, noncompetitive to glucose 1-phosphate Hordeum vulgare subsp. vulgare
UTP competitive to UDP-glucose; product inhibition Hordeum vulgare subsp. vulgare

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
additional information
-
additional information kinetics Hordeum vulgare subsp. vulgare
0.074
-
alpha-D-glucose 1-phosphate pH 8.35,25°C Hordeum vulgare subsp. vulgare
0.093
-
UTP pH 8.35, 25°C Hordeum vulgare subsp. vulgare
0.17
-
diphosphate pH 8.35, 25°C Hordeum vulgare subsp. vulgare
0.19
-
UDP-glucose pH 8.35, 25°C Hordeum vulgare subsp. vulgare

Metals/Ions

Metals/Ions Comment Organism Structure
Mg2+ requirement Hordeum vulgare subsp. vulgare

Organism

Organism UniProt Comment Textmining
Hordeum vulgare subsp. vulgare
-
-
-

Reaction

Reaction Comment Organism Reaction ID
UTP + alpha-D-glucose 1-phosphate = diphosphate + UDP-glucose sequential ordered bi bi reaction mechanism Hordeum vulgare subsp. vulgare

Source Tissue

Source Tissue Comment Organism Textmining
seedling germinated, malt Hordeum vulgare subsp. vulgare
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
ATP + alpha-D-glucose 1-phosphate 13.7% of the activity with UTP Hordeum vulgare subsp. vulgare diphosphate + ADP-glucose
-
r
diphosphate + CDP-glucose 18.5% of the activity with UTP Hordeum vulgare subsp. vulgare CTP + alpha-D-glucose 1-phosphate
-
r
diphosphate + GDP-glucose 14.3% of the activity with UTP Hordeum vulgare subsp. vulgare GTP + alpha-D-glucose 1-phosphate
-
r
additional information substrate specificity Hordeum vulgare subsp. vulgare ?
-
?
UTP + alpha-D-glucose 1-phosphate
-
Hordeum vulgare subsp. vulgare diphosphate + UDP-glucose
-
r

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
25
-
assay at Hordeum vulgare subsp. vulgare

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
8.35
-
assay at Hordeum vulgare subsp. vulgare

Ki Value [mM]

Ki Value [mM] Ki Value maximum [mM] Inhibitor Comment Organism Structure
0.015
-
UDP-glucose versus glucose 1-phosphate, pH 8.35, 25°C Hordeum vulgare subsp. vulgare
0.12
-
UDP-glucose versus UTP, pH 8.35, 25°C Hordeum vulgare subsp. vulgare
0.17
-
UTP versus UDP-glucose, pH 8.35, 25°C Hordeum vulgare subsp. vulgare
0.213
-
diphosphate versus glucose 1-phosphate, pH 8.35, 25°C Hordeum vulgare subsp. vulgare
0.95
-
diphosphate versus UTP, pH 8.35, 25°C Hordeum vulgare subsp. vulgare
10.9
-
phosphate versus UTP, pH 8.35, 25°C Hordeum vulgare subsp. vulgare
12.2
-
phosphate versus glucose 1-phosphate, pH 8.35, 25°C Hordeum vulgare subsp. vulgare