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Literature summary for 3.1.1.27 extracted from

  • Jong, Y.J.; Snell, E.E.
    Enzymes of vitamin B6 degradation. Purification and properties of 4- and 5-pyridoxolactonases (1986), J. Biol. Chem., 261, 15112-15114.
    View publication on PubMed

Inhibitors

Inhibitors Comment Organism Structure
5-Pyridoxolactone
-
Pseudomonas sp.
HgCl2
-
Pseudomonas sp.
p-chloromercuribenzoate
-
Pseudomonas sp.
Zn2+
-
Pseudomonas sp.

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.0059
-
4-Pyridoxolactone
-
Pseudomonas sp.

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
28000
-
2 * 28000, SDS-PAGE Pseudomonas sp.
54000
-
gel filtration Pseudomonas sp.

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
4-Pyridoxolactone + H2O Pseudomonas sp. vitamin B6 degradation ?
-
?

Organism

Organism UniProt Comment Textmining
Pseudomonas sp.
-
MA-1
-

Purification (Commentary)

Purification (Comment) Organism
-
Pseudomonas sp.

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
35.2
-
-
Pseudomonas sp.

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
4-pyridoxolactone + H2O no hydrolysis of 5-pyridoxolactone Pseudomonas sp. 4-pyridoxate
-
?
4-Pyridoxolactone + H2O vitamin B6 degradation Pseudomonas sp. ?
-
?

Subunits

Subunits Comment Organism
dimer 2 * 28000, SDS-PAGE Pseudomonas sp.

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
7
-
-
Pseudomonas sp.

pH Range

pH Minimum pH Maximum Comment Organism
5.9 8.7 50% of maximal activity at pH 5.9 and pH 8.7 Pseudomonas sp.