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Literature summary for 1.14.19.1 extracted from

  • Wilson, A.C.; Miller, R.W.
    Growth temperature-dependent stearoyl coenzyme A desaturase activity of Fusarium oxysporum microsomes (1978), Can. J. Biochem., 56, 1109-1114.
    View publication on PubMed

Activating Compound

Activating Compound Comment Organism Structure
1,10-phenanthroline 26% stimulation Fusarium oxysporum

Inhibitors

Inhibitors Comment Organism Structure
CN- 44% inhibition at 1 mM Fusarium oxysporum
cytochrome c 32% inhibition at 0.01 mM Fusarium oxysporum
EDTA 46% inhibition at 10 mM Fusarium oxysporum
Fe2+ 76% inhibition at 10 mM Fusarium oxysporum
menadione 66% inhibition at 0.1 mM Fusarium oxysporum
phenazine methosulfate 100% inhibition at 0.4 mM Fusarium oxysporum
Thenoyltrifluoroacetone 59% inhibition at 6 mM; i.e. 4,4,4-trifluoro-1-(2-thienyl)-1,3-butanedione Fusarium oxysporum

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.038
-
NADPH
-
Fusarium oxysporum
0.089
-
NADH
-
Fusarium oxysporum

Localization

Localization Comment Organism GeneOntology No. Textmining
microsome
-
Fusarium oxysporum
-
-

Metals/Ions

Metals/Ions Comment Organism Structure
Fe2+ iron-sulfur protein(s) may act as electron carrier(s) in place of the cytchrome b5 and NADH cytochrome b5 reductase system associated with the mammalian desaturase systems Fusarium oxysporum
superoxid dismutase 8% stimulation Fusarium oxysporum

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
stearoyl-CoA + AH2 + O2 Fusarium oxysporum oleic acid biosynthesis oleoyl-CoA + A + H2O
-
?

Organism

Organism UniProt Comment Textmining
Fusarium oxysporum
-
f. sp. lycopersici
-

Reaction

Reaction Comment Organism Reaction ID
stearoyl-CoA + 2 ferrocytochrome b5 + O2 + 2 H+ = oleoyl-CoA + 2 ferricytochrome b5 + 2 H2O presence of an unusual microsomal electron transport system associated with the desaturase Fusarium oxysporum

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
additional information
-
enzyme activity is highest in microsomes from cells grown at 37°C and lowest in cells grown at 15°C Fusarium oxysporum
0.00044
-
enzyme of cells grown at 37°C Fusarium oxysporum

Storage Stability

Storage Stability Organism
-20°C, argon, microsomal fraction, stable for up to 4 weeks Fusarium oxysporum

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
stearoyl-CoA + AH2 + O2 oleic acid biosynthesis Fusarium oxysporum oleoyl-CoA + A + H2O
-
?
stearoyl-CoA + NAD(P)H + O2
-
Fusarium oxysporum oleoyl-CoA + NAD(P)+ + H2O
-
?

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
25
-
assay at Fusarium oxysporum

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
additional information
-
repeated freezing causes loss of activity Fusarium oxysporum

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
8.2 8.3 assay at pH 8.4 Fusarium oxysporum

Cofactor

Cofactor Comment Organism Structure
heme b-type, nonheme iron-sulfur component Fusarium oxysporum
NADH
-
Fusarium oxysporum
NADPH absolute requirement, preferred Fusarium oxysporum