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Literature summary for 1.14.17.4 extracted from

  • Mirica, L.M.; Klinman, J.P.
    The nature of O2 activation by the ethylene-forming enzyme 1-aminocyclopropane-1-carboxylic acid oxidase (2008), Proc. Natl. Acad. Sci. USA, 105, 1814-1819.
    View publication on PubMedView publication on EuropePMC

Cloned(Commentary)

Cloned (Comment) Organism
expression in Escherichia coli Solanum lycopersicum

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
additional information
-
additional information steady-state kinetics, solvent isotope effects, and competitive oxygen kinetic isotope effects, overview Solanum lycopersicum

Metals/Ions

Metals/Ions Comment Organism Structure
Fe2+ kinetic role in catalysis forming oxygen complexes, overview Solanum lycopersicum

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
1-aminocyclopropane-1-carboxylate + ascorbate + O2 Solanum lycopersicum
-
ethylene + cyanide + dehydroascorbate + CO2 + H2O
-
?

Organism

Organism UniProt Comment Textmining
Solanum lycopersicum
-
-
-

Purification (Commentary)

Purification (Comment) Organism
recombinant enzyme from Escherichia coli to homogeneity Solanum lycopersicum

Reaction

Reaction Comment Organism Reaction ID
1-aminocyclopropane-1-carboxylate + ascorbate + O2 = ethene + cyanide + dehydroascorbate + CO2 + 2 H2O reaction mechanism Solanum lycopersicum

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
additional information
-
-
Solanum lycopersicum

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
1-aminocyclopropane-1-carboxylate + ascorbate + O2
-
Solanum lycopersicum ethylene + cyanide + dehydroascorbate + CO2 + H2O
-
?
1-aminocyclopropane-1-carboxylate + ascorbate + O2 kinetics and mechanism of O2 activation, the rate-determining step is the formation of an FeIV=O species, which acts as the reactive intermediate in substrate oxidation, the FeIV=O species is linked to a rate-limiting proton or hydrogen atom transfer step, overview Solanum lycopersicum ethylene + cyanide + dehydroascorbate + CO2 + H2O
-
?

Synonyms

Synonyms Comment Organism
1-aminocyclopropane-1-carboxylic acid oxidase
-
Solanum lycopersicum
ACC oxidase
-
Solanum lycopersicum
ACCO
-
Solanum lycopersicum
ethylene-forming enzyme
-
Solanum lycopersicum

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
25
-
assay at Solanum lycopersicum

Turnover Number [1/s]

Turnover Number Minimum [1/s] Turnover Number Maximum [1/s] Substrate Comment Organism Structure
0.223
-
1-aminocyclopropane-1-carboxylate pH 7.2, 25°C, 2 mM ascorbate, recombinant enzyme Solanum lycopersicum
0.612
-
1-aminocyclopropane-1-carboxylate pH 7.2, 25°C, 20 mM ascorbate, recombinant enzyme Solanum lycopersicum

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
7.2
-
assay at Solanum lycopersicum

Cofactor

Cofactor Comment Organism Structure
ascorbate best at 20 mM, kinetics, overview Solanum lycopersicum