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Literature summary for 1.1.3.8 extracted from

  • Nishikimi, M.; Tolbert, B.M.; Udenfriend, S.
    Purification and characterization of L-gulono-gamma-lactone oxidase from rat and goat liver (1976), Arch. Biochem. Biophys., 175, 427-435.
    View publication on PubMed

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.066
-
L-gulono-1,4-lactone
-
Rattus norvegicus
0.15
-
L-gulono-1,4-lactone
-
Capra hircus

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
51000
-
x * 51000, SDS-PAGE Rattus norvegicus
51000
-
x * 51000, SDS-PAGE Capra hircus
500000
-
gel filtration Rattus norvegicus
500000
-
gel filtration Capra hircus

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
-
?
L-gulono-1,4-lactone + O2 Capra hircus
-
L-xylo-hex-3-ulonolactone + H2O2
-
?

Organism

Organism UniProt Comment Textmining
Capra hircus
-
-
-
Rattus norvegicus
-
-
-

Purification (Commentary)

Purification (Comment) Organism
-
Rattus norvegicus
-
Capra hircus

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
L-gulono-1,4-lactone + O2 = L-xylo-hex-2-ulono-1,4-lactone + H2O2 product isomerizes spontaneously to L-ascorbate Capra hircus

Source Tissue

Source Tissue Comment Organism Textmining

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
0.54
-
-
Rattus norvegicus
2.05
-
-
Capra hircus

Storage Stability

Storage Stability Organism
-20 C, 1 month, 100% activity Rattus norvegicus

Substrates and Products (Substrate)

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

Subunits

Subunits Comment Organism
oligomer x * 51000, SDS-PAGE Rattus norvegicus
oligomer x * 51000, SDS-PAGE Capra hircus

Temperature Optimum [°C]

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

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
7.5
-
-
Rattus norvegicus
7.5
-
-
Capra hircus

Cofactor

Cofactor Comment Organism Structure
flavin covalently bound, flavoenzyme Rattus norvegicus
flavin covalently bound, flavoenzyme Capra hircus