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Literature summary for 4.3.1.12 extracted from

  • Costilow, R.N.; Laycock, L.
    Ornithine cyclase (deaminating). Purification of a protein that converts ornithine to proline and definition of the optimal assay conditions (1971), J. Biol. Chem., 246, 6655-6660.
    View publication on PubMed

General Stability

General Stability Organism
low concentrations of ornithine stabilize Clostridium sporogenes

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.0061
-
NAD+
-
Clostridium sporogenes
3.3
-
NADP+
-
Clostridium sporogenes
11.1
-
L-ornithine
-
Clostridium sporogenes

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
L-ornithine Clostridium sporogenes
-
?
-
?

Organism

Organism UniProt Comment Textmining
Clostridium sporogenes
-
National Canners Association, PA 3679
-
Clostridium sporogenes
-
ATCC 7955
-

Oxidation Stability

Oxidation Stability Organism
enzyme activity in the presence of air is 80 to 90% of those in argon atmosphere Clostridium sporogenes

Purification (Commentary)

Purification (Comment) Organism
partial Clostridium sporogenes

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
additional information
-
-
Clostridium sporogenes
3.12
-
-
Clostridium sporogenes

Storage Stability

Storage Stability Organism
-10°C, rapid loss of activity during storage Clostridium sporogenes

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
L-ornithine reaction is either irreversible or equilibrium is far in the direction of proline Clostridium sporogenes L-proline + NH3
-
?
L-ornithine specific Clostridium sporogenes L-proline + NH3
-
?
L-ornithine
-
Clostridium sporogenes ?
-
?

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
44
-
-
Clostridium sporogenes

Temperature Range [°C]

Temperature Minimum [°C] Temperature Maximum [°C] Comment Organism
33 52 50% of maximal activity at 33°C and 52°C Clostridium sporogenes

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
8 8.2
-
Clostridium sporogenes

pH Range

pH Minimum pH Maximum Comment Organism
6.6 9.8 50% of maximal activity at pH 6.6 and pH 9.8 Clostridium sporogenes

Cofactor

Cofactor Comment Organism Structure
NAD+ required for maximal activity Clostridium sporogenes