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Literature summary for 1.2.4.4 extracted from

  • Johnson, W.A.; Connelly, J.L.
    Cellular localization and characterization of bovine liver branched-chain -keto acid dehydrogenases (1972), Biochemistry, 11, 1967-1973.
    View publication on PubMed

Activating Compound

Activating Compound Comment Organism Structure
thiamine diphosphate required Bos taurus

Inhibitors

Inhibitors Comment Organism Structure
ATP
-
Bos taurus

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.03
-
NAD+
-
Bos taurus
0.06
-
coenzyme A
-
Bos taurus

Localization

Localization Comment Organism GeneOntology No. Textmining
mitochondrion
-
Bos taurus 5739
-

Metals/Ions

Metals/Ions Comment Organism Structure
Ca2+ required Bos taurus
Mg2+ required Bos taurus
phosphate required Bos taurus

Organism

Organism UniProt Comment Textmining
Bos taurus
-
-
-

Source Tissue

Source Tissue Comment Organism Textmining
liver
-
Bos taurus
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
additional information
-
-
Bos taurus

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
3-methyl-2-oxobutanoate + [dihydrolipoyllysine-residue (2-methylpropanoyl)transferase] lipoyllysine
-
Bos taurus [dihydrolipoyllysine-residue (2-methylpropanoyl)transferase] S-(2-methylpropanoyl)dihydrolipoyllysine + CO2
-
?
3-methyl-2-oxopentanoate + [dihydrolipoyllysine-residue (2-methylpropanoyl)transferase] lipoyllysine
-
Bos taurus [dihydrolipoyllysine-residue (2-methylpropanoyl)transferase] S-(2-methylbutanoyl)dihydrolipoyllysine + CO2
-
?
4-methyl-2-oxopentanoate + NAD+ + CoA
-
Bos taurus 3-methylbutanoyl-CoA + CO2 + NADH
-
?

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
6.8 7.4
-
Bos taurus

Cofactor

Cofactor Comment Organism Structure
CoA Km: 0.064 mM Bos taurus
NAD+
-
Bos taurus