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Literature summary for 1.1.3.8 extracted from

  • Fujitsuka, N.; Yokozawa, T.; Oura, H.; Akao, T.; Kobashi, K.; Ienaga, K.; Nakamura, K.
    L-Gulono-gamma-lactone oxidase is the enzyme responsible for the production of methylguanidine in the rat liver (1993), Nephron, 63, 445-451.
    View publication on PubMed

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.005
-
L-gulono-1,4-lactone at pH 7.4 Rattus norvegicus
4.28
-
creatol at pH 9.0 Rattus norvegicus
12.8
-
creatol at pH 7.4 Rattus norvegicus

Localization

Localization Comment Organism GeneOntology No. Textmining
microsome
-
Rattus norvegicus
-
-

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
50000
-
SDS-PAGE Rattus norvegicus

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
L-gulono-1,4-lactone + O2 Rattus norvegicus
-
L-xylo-hex-3-ulonolactone + H2O2
-
?

Organism

Organism UniProt Comment Textmining
Rattus norvegicus
-
-
-

Reaction

Reaction Comment Organism Reaction ID
L-gulono-1,4-lactone + O2 = L-xylo-hex-2-ulono-1,4-lactone + H2O2 product isomerizes spontaneously to L-ascorbate Rattus norvegicus

Source Tissue

Source Tissue Comment Organism Textmining
liver
-
Rattus norvegicus
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
0.078
-
methylguanidine synthesis Rattus norvegicus
1.11
-
L-ascorbate synthesis Rattus norvegicus

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
creatol + O2 creatone A and creatone B are intermediates Rattus norvegicus methylguanidine + ?
-
?
L-gulono-1,4-lactone + O2
-
Rattus norvegicus L-xylo-hex-3-ulonolactone + H2O2
-
?
L-gulono-1,4-lactone + O2
-
Rattus norvegicus L-xylo-hex-3-ulonolactone + H2O2 product isomerizes spontaneously to L-ascorbate ?

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
37
-
-
Rattus norvegicus

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
7.5
-
L-ascorbate synthesis Rattus norvegicus
9
-
synthesis of methylguanidine Rattus norvegicus

Cofactor

Cofactor Comment Organism Structure
flavin covalently bound, flavoenzyme Rattus norvegicus