Activating Compound | Comment | Organism | Structure |
---|---|---|---|
additional information | no effectors of UDP-galactose-forming reaction are MgUDP, magnesium citrate, magnesium oxaloacetate or sucrose | Cucumis sativus |
Inhibitors | Comment | Organism | Structure |
---|---|---|---|
Mg-diphosphate | strong inhibition, UDP-galactose synthesis | Cucumis sativus |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.1 | 0.14 | UTP | pH 7.2, 30°C | Cucumis sativus | |
0.18 | - |
diphosphate | pH 7.2, 30°C | Cucumis sativus | |
0.18 | - |
diphosphate | phosphate in form of Mg-diphosphate | Cucumis sativus | |
0.75 | - |
alpha-D-glucose 1-phosphate | pH 7.2, 30°C | Cucumis sativus | |
1.2 | - |
alpha-D-galactose 1-phosphate | pH 7.2, 30°C | Cucumis sativus |
Metals/Ions | Comment | Organism | Structure |
---|---|---|---|
Mg2+ | requirement | Cucumis sativus | |
Mg2+ | MgH2P2O7 | Cucumis sativus | |
additional information | phosphate is no effector of UDP-galactose synthesis | Cucumis sativus |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Cucumis sativus | - |
cv. Calypiso | - |
Purification (Comment) | Organism |
---|---|
partial | Cucumis sativus |
Source Tissue | Comment | Organism | Textmining |
---|---|---|---|
fruit peduncle | - |
Cucumis sativus | - |
fruit peduncle | of unpollinated ovaries | Cucumis sativus | - |
Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
---|---|---|---|
0.36 | - |
peduncles of developing fruits | Cucumis sativus |
0.56 | - |
unpollinated peduncles | Cucumis sativus |
3.8 | - |
partially purified enzyme, substrate alpha-D-galactose 1-phosphate | Cucumis sativus |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
diphosphate + UDP-alpha-D-galactose | - |
Cucumis sativus | UTP + alpha-D-galactose 1-phosphate | - |
? | |
UTP + alpha-D-galactose 1-phosphate | preferred substrate | Cucumis sativus | diphosphate + UDP-galactose | - |
r | |
UTP + alpha-D-glucose 1-phosphate | - |
Cucumis sativus | diphosphate + UDP-glucose | - |
r |
Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
---|---|---|---|
30 | - |
assay at | Cucumis sativus |
Temperature Stability Minimum [°C] | Temperature Stability Maximum [°C] | Comment | Organism |
---|---|---|---|
56 | - |
2.5 min, 80% loss of activity in crude desalted extracts | Cucumis sativus |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
6 | 7.5 | broad, forward reaction | Cucumis sativus |
6 | - |
reverse reaction | Cucumis sativus |
Ki Value [mM] | Ki Value maximum [mM] | Inhibitor | Comment | Organism | Structure |
---|---|---|---|---|---|
0.58 | - |
Mg-diphosphate | pH 7.2, 30°C | Cucumis sativus |