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Literature summary for 2.7.1.67 extracted from

  • Okpodu, C.M.; Gross, W.; Burkhart, W.; Boss, W.F.
    Purification and Characterization of a Soluble Phosphatidylinositol 4-Kinase from Carrot Suspension Culture Cells (1995), Plant Physiol., 107, 491-500.
    View publication on PubMedView publication on EuropePMC

Activating Compound

Activating Compound Comment Organism Structure
Triton X-100 maximal activity occurs when the substrate is added as Triton X-100/phosphatidylinositol mixed micelles Daucus carota

Inhibitors

Inhibitors Comment Organism Structure
adenosine 0.1 mM, no effect Daucus carota
ADP up to 0.1 mM, no effect Daucus carota
Ca2+ 0.01 mM to 1 mM: no effect Daucus carota

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.4
-
ATP pH 8.0, 25°C Daucus carota

Metals/Ions

Metals/Ions Comment Organism Structure
Ca2+ 0.01-1 mM, no effect Daucus carota
Mg2+ divalent cation required. At 1-5 mM, Mn2+ is more effective than Mg2+ in increasing enzyme activity. Maximal activity occurs at 25-40 mM Daucus carota
Mn2+ divalent cation required. At 1-5 mM, Mn2+ is more effective than Mg2+ in increasing enzyme activity Daucus carota

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
80000
-
1 * 80000, SDS-PAGE Daucus carota
83000
-
gel filtration Daucus carota

Organism

Organism UniProt Comment Textmining
Daucus carota
-
-
-

Purification (Commentary)

Purification (Comment) Organism
-
Daucus carota

Source Tissue

Source Tissue Comment Organism Textmining
cell suspension culture
-
Daucus carota
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
0.0075
-
-
Daucus carota

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
ATP + 1-phosphatidyl-1D-myo-inositol
-
Daucus carota ADP + 1-phosphatidyl-1D-myo-inositol 4-phosphate
-
?

Subunits

Subunits Comment Organism
monomer 1 * 80000, SDS-PAGE Daucus carota

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
8 8.5
-
Daucus carota

pH Range

pH Minimum pH Maximum Comment Organism
6.5 8.5 pH 6.5: about 40% of maximal activity, pH 8.0-8.5: optimium Daucus carota