Inhibitors | Comment | Organism | Structure |
---|---|---|---|
D-inositol 3-phosphate | substrate inhibition above 0.7 mM | Arabidopsis thaliana |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.107 | - |
beta-L-galactose 1-phosphate | pH 7.5, 22°C | Arabidopsis thaliana | |
0.191 | - |
D-inositol 3-phosphate | pH 7.5, 22°C | Arabidopsis thaliana |
Metals/Ions | Comment | Organism | Structure |
---|---|---|---|
Mg2+ | about 3fold activation, optimum concentration 3-4 mM | Arabidopsis thaliana |
Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
---|---|---|---|
33100 | - |
x * 39700, SDS-PAGE, x * 33100, calculated | Arabidopsis thaliana |
39700 | - |
x * 39700, SDS-PAGE, x * 33100, calculated | Arabidopsis thaliana |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Arabidopsis thaliana | Q9M8S8 | bifunctional L-galactose 1-phosphate phosphatase/myo-inositol monophosphatase | - |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
alpha-D-glucose 1-phosphate + H2O | 19% of the activity with myo-inositol | Arabidopsis thaliana | alpha-D-glucose + phosphate | - |
? | |
beta-L-galactose 1-phosphate + H2O | 166-240% of the activity with myo-inositol | Arabidopsis thaliana | L-galactose + phosphate | - |
? | |
D-galactose 1-phosphate + H2O | 16.6% of the activity with myo-inositol | Arabidopsis thaliana | D-galactose + phosphate | - |
? | |
D-inositol 3-phosphate + H2O | - |
Arabidopsis thaliana | D-inositol + phosphate | - |
? | |
glycerol 2-phosphate + H2O | 52% of the activity with myo-inositol | Arabidopsis thaliana | glycerol + phosphate | - |
? | |
additional information | Fru 1-phosphate, Fru 1,6-bisphosphate, Glc 6-phosphate, D-alpha-glycerophosphate, sorbitol 6-phosphate, and myo-inositol 2-V show little to no hydrolysis in assays | Arabidopsis thaliana | ? | - |
? | |
myo-inositol 1-phosphate + H2O | - |
Arabidopsis thaliana | myo-inositol + phosphate | - |
? |
Subunits | Comment | Organism |
---|---|---|
? | x * 39700, SDS-PAGE, x * 33100, calculated | Arabidopsis thaliana |
Synonyms | Comment | Organism |
---|---|---|
VTC4 | - |
Arabidopsis thaliana |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
7.5 | - |
- |
Arabidopsis thaliana |
General Information | Comment | Organism |
---|---|---|
physiological function | knockout lines of isoform VTC4 exhibit small perturbations in abscisic acid, salt, and cold responses. Less myo-inositol and ascorbate accumulate in these mutants | Arabidopsis thaliana |