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Literature summary for 2.4.1.14 extracted from

  • Mendicino, J.
    Sucrose phosphate synthesis in wheat germ and green leaves (1960), J. Biol. Chem., 235, 3347-3352.
    View publication on PubMed

Inhibitors

Inhibitors Comment Organism Structure
D-fructose 6-phosphate inhibitory at high concentrations Triticum aestivum
UDP
-
Spinacia oleracea
UDP competitive with UDP-glucose Triticum aestivum

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
3
-
D-fructose 6-phosphate
-
Triticum aestivum
7.4
-
UDP-glucose
-
Triticum aestivum

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
UDP-alpha-D-glucose + D-fructose 6-phosphate Triticum aestivum catalyzes the penultimate step of sucrose synthesis UDP + sucrose 6-phosphate
-
?
UDP-alpha-D-glucose + D-fructose 6-phosphate Spinacia oleracea catalyzes the penultimate step of sucrose synthesis UDP + sucrose 6-phosphate
-
?

Organism

Organism UniProt Comment Textmining
Spinacia oleracea
-
-
-
Triticum aestivum
-
wheat
-

Purification (Commentary)

Purification (Comment) Organism
partial Triticum aestivum
partial Spinacia oleracea

Source Tissue

Source Tissue Comment Organism Textmining
germ
-
Triticum aestivum
-
leaf
-
Spinacia oleracea
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
1.1
-
purified enzyme Triticum aestivum

Storage Stability

Storage Stability Organism
-10°C, 2 months, 10% loss of activity Triticum aestivum

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
additional information fructose or fructose 1-phosphate are not accepted as substrates Triticum aestivum ?
-
?
UDP-alpha-D-glucose + D-fructose 6-phosphate
-
Spinacia oleracea UDP + sucrose 6-phosphate
-
r
UDP-alpha-D-glucose + D-fructose 6-phosphate
-
Triticum aestivum UDP + sucrose 6-phosphate equilibrium lies far on the product side r
UDP-alpha-D-glucose + D-fructose 6-phosphate catalyzes the penultimate step of sucrose synthesis Triticum aestivum UDP + sucrose 6-phosphate
-
?
UDP-alpha-D-glucose + D-fructose 6-phosphate catalyzes the penultimate step of sucrose synthesis Spinacia oleracea UDP + sucrose 6-phosphate
-
?

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
37
-
stable for at least 20 min Triticum aestivum

Ki Value [mM]

Ki Value [mM] Ki Value maximum [mM] Inhibitor Comment Organism Structure
3.6
-
UDP
-
Triticum aestivum