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Literature summary for 2.5.1.54 extracted from

  • Suzich, J.A.; Dean, J.F.D.; Herrmann, K.M.
    3-Deoxy-D-arabino-heptulosonate 7-phosphate synthase from carrot root (Daucus carota) is a hysteretic enzyme (1985), Plant Physiol., 79, 765-770.
    View publication on PubMedView publication on EuropePMC

Activating Compound

Activating Compound Comment Organism Structure
L-Trp activates Daucus carota

General Stability

General Stability Organism
Mn2+ stabilizes during purification Daucus carota

Inhibitors

Inhibitors Comment Organism Structure
7-phospho-2-dehydro-3-deoxy-D-arabino-heptonate product inhibition Daucus carota
EDTA
-
Daucus carota
metal chelators
-
Daucus carota
phosphate non-competitive with respect to both phosphoenolpyruvate and D-erythrose 4-phosphate Daucus carota

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.03
-
phosphoenolpyruvate pH 7.0, 25°C Daucus carota
0.07
-
D-erythrose 4-phosphate pH 7.0, 25°C Daucus carota

Metals/Ions

Metals/Ions Comment Organism Structure
Mn2+ stimulates Daucus carota

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
53000
-
2 * 53000, SDS-PAGE Daucus carota
103000
-
gel filtration Daucus carota

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
phosphoenolpyruvate + D-erythrose 4-phosphate + H2O Daucus carota first enzyme of the aromatic amino acid biosynthesis 2-dehydro-3-deoxy-D-arabino-heptonate 7-phosphate + phosphate
-
?

Organism

Organism UniProt Comment Textmining
Daucus carota
-
3 enzymes: I, II, and II
-

Purification (Commentary)

Purification (Comment) Organism
enzyme III Daucus carota

Source Tissue

Source Tissue Comment Organism Textmining
root
-
Daucus carota
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
7.1
-
purified enzyme Daucus carota

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
phosphoenolpyruvate + D-erythrose 4-phosphate + H2O
-
Daucus carota 2-dehydro-3-deoxy-D-arabino-heptonate 7-phosphate + phosphate
-
?
phosphoenolpyruvate + D-erythrose 4-phosphate + H2O first enzyme of the aromatic amino acid biosynthesis Daucus carota 2-dehydro-3-deoxy-D-arabino-heptonate 7-phosphate + phosphate
-
?

Subunits

Subunits Comment Organism
dimer 2 * 53000, SDS-PAGE Daucus carota

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
25
-
assay at Daucus carota

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
7
-
assay at Daucus carota
7.1
-
-
Daucus carota