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Literature summary for 2.4.2.9 extracted from

  • McIvor, R.S.; Wohlhueter, R.M.; Plagemann, P.G.W.
    Uracil phosphoribosyltransferase from Acholeplasma laidlawii: partial purification and kinetic properties (1983), J. Bacteriol., 156, 192-197.
    View publication on PubMedView publication on EuropePMC

General Stability

General Stability Organism
UMP stabilizes the enzyme Acholeplasma laidlawii

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.0042
-
Uracil
-
Acholeplasma laidlawii
0.066
-
5-phospho-alpha-D-ribose 1-diphosphate
-
Acholeplasma laidlawii

Metals/Ions

Metals/Ions Comment Organism Structure
Mg2+ required Acholeplasma laidlawii
Mg2+ optimal concentration: 5 mM Acholeplasma laidlawii

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
80000
-
gel filtration Acholeplasma laidlawii

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
uracil + 5-phospho-alpha-D-ribose 1-diphosphate Acholeplasma laidlawii incorporation of uracil into nucleotides UMP + diphosphate
-
?

Organism

Organism UniProt Comment Textmining
Acholeplasma laidlawii
-
-
-

Purification (Commentary)

Purification (Comment) Organism
partial Acholeplasma laidlawii

Reaction

Reaction Comment Organism Reaction ID
UMP + diphosphate = uracil + 5-phospho-alpha-D-ribose 1-diphosphate ping-pong reaction mechanism Acholeplasma laidlawii

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
0.22
-
partially purified enzyme Acholeplasma laidlawii

Storage Stability

Storage Stability Organism
4°C, rapid loss of activity when stored in presence of Mg2+ Acholeplasma laidlawii

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
uracil + 5-phospho-alpha-D-ribose 1-diphosphate
-
Acholeplasma laidlawii UMP + diphosphate
-
?
uracil + 5-phospho-alpha-D-ribose 1-diphosphate incorporation of uracil into nucleotides Acholeplasma laidlawii UMP + diphosphate
-
?

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
37
-
assay at Acholeplasma laidlawii

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
7.5 8
-
Acholeplasma laidlawii

pH Range

pH Minimum pH Maximum Comment Organism
7.2 8 pH 7.2: about 50% of activity maximum, pH 8.0: about 70% of activity maximum Acholeplasma laidlawii