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Literature summary for 4.1.1.72 extracted from

  • de la Plaza, M.; Fernandez de Palencia, P.; Pelaez, C.; Requena, T.
    Biochemical and molecular characterization of alpha-ketoisovalerate decarboxylase, an enzyme involved in the formation of aldehydes from amino acids by Lactococcus lactis (2004), FEMS Microbiol. Lett., 238, 367-374.
    View publication on PubMed

Inhibitors

Inhibitors Comment Organism Structure
1,10-phenanthroline 10 mM, 4.5% residual activity Lactococcus lactis subsp. lactis
4-hydroxymercuribenzoic acid 1 mM, 59% residual activity Lactococcus lactis subsp. lactis
Cu2+ 1 mM, 5.2% residual activity Lactococcus lactis subsp. lactis
EDTA 1 mM, 4.3% residual activity Lactococcus lactis subsp. lactis
phenylmethanesulfonyl fluoride 1 mM, 71.7% residual activity Lactococcus lactis subsp. lactis
phosphoramidon 1 mM, 52% residual activity Lactococcus lactis subsp. lactis
Zn2+ 1 mM, 66% residual activity Lactococcus lactis subsp. lactis

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
1.9
-
2-oxoisovalerate pH 6.5, 37°C Lactococcus lactis subsp. lactis

Metals/Ions

Metals/Ions Comment Organism Structure
Ca2+ 1 mM, 124% of initial activity Lactococcus lactis subsp. lactis
Co2+ 1 mM, 110% of initial activity Lactococcus lactis subsp. lactis
Na+ 1 mM, 121% of initial activity Lactococcus lactis subsp. lactis

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
61000
-
4 * 61000, calculated Lactococcus lactis subsp. lactis
240000
-
gel filtration Lactococcus lactis subsp. lactis

Organism

Organism UniProt Comment Textmining
Lactococcus lactis subsp. lactis Q684J7
-
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
80.7
-
pH 6.5, 37°C Lactococcus lactis subsp. lactis

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
2-oxoisocaproate 22.7% of the activity with 2-oxoisovalerate Lactococcus lactis subsp. lactis 3-methylbutanal + CO2
-
?
2-oxoisovalerate
-
Lactococcus lactis subsp. lactis 2-methylpropanal + CO2
-
?
2-oxomethylvalerate 16.7% of the activity with 2-oxoisovalerate Lactococcus lactis subsp. lactis pentanal + CO2
-
?
additional information very poor substrates: indole-3-pyruvate and pyruvate Lactococcus lactis subsp. lactis ?
-
?
Phenylpyruvate
-
Lactococcus lactis subsp. lactis Phenylacetaldehyde + CO2 8.8% of the activity with 2-oxoisovalerate ?

Subunits

Subunits Comment Organism
tetramer 4 * 61000, calculated Lactococcus lactis subsp. lactis

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
45
-
-
Lactococcus lactis subsp. lactis

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
6.5
-
-
Lactococcus lactis subsp. lactis

Cofactor

Cofactor Comment Organism Structure
thiamine diphosphate enzyme is a non-oxidative thiamin diphosphate-dependent alpha-oxoacid decarboxylase Lactococcus lactis subsp. lactis