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1.2.4.4: 3-methyl-2-oxobutanoate dehydrogenase (2-methylpropanoyl-transferring)

This is an abbreviated version!
For detailed information about 3-methyl-2-oxobutanoate dehydrogenase (2-methylpropanoyl-transferring), go to the full flat file.

Word Map on EC 1.2.4.4

Reaction

3-methyl-2-oxobutanoate
+
[dihydrolipoyllysine-residue (2-methylpropanoyl)transferase] lipoyllysine
=
[dihydrolipoyllysine-residue (2-methylpropanoyl)transferase] S-(2-methylpropanoyl)dihydrolipoyllysine
+
CO2
+ 2 H+

Synonyms

2-oxoisocaproate dehydrogenase, 2-oxoisovalerate dehydrogenase, 2-oxoisovalerate dehydrogenase (lipoate), 2-oxoisovalerate dehydrogenase subunit alpha, alpha-keto-beta-methylvalerate dehydrogenase, alpha-ketoacid dehydrogenase, alpha-ketoisocaproate dehydrogenase, alpha-ketoisocaproic dehydrogenase, alpha-ketoisocaproic-alpha-keto-beta-methylvaleric dehydrogenase, alpha-ketoisovalerate dehydrogenase, alpha-oxoisocaproate dehydrogenase, BCDH, BCKA dehydrogenase, BCKADC, BCKD, BCKDC, BCKDH, BCKDH E1-alpha, BCKDH E1-beta, BCKDHA, BCKDHB, BCKDHc, BCOA, BCOAD, BDKG, Bkd, bkdF, branched chain alpha-ketoacid dehydrogenase complex, branched chain keto acid dehydrogenase, branched-chain (-2-oxoacid BCD) dehydrogenase, branched-chain 2-keto acid dehydrogenase, branched-chain 2-oxo acid dehydrogenase, branched-chain alpha-keto acid decarboxylase/dehydrogenase, branched-chain alpha-keto acid dehydrogenase, branched-chain alpha-keto acid dehydrogenase complex, branched-chain alpha-keto acid dehydrogenase E1beta subunit, branched-chain alpha-ketoacid dehydrogenase, branched-chain alpha-ketoacid dehydrogenase complex, branched-chain alpha-ketoacid dehydrogenase enzyme complex, branched-chain alpha-ketoacid dehydrogenase multienzyme complex, branched-chain alpha-oxo acid dehydrogenase, branched-chain keto acid dehydrogenase, branched-chain keto acid dehydrogenase complex, branched-chain ketoacid dehydrogenase, branched-chain ketoacid dehydrogenase E1, dehydrogenase, 2-oxoisocaproate, dehydrogenase, 2-oxoisovalerate (lipoate), dehydrogenase, branched chain alpha-keto acid, DHalpha, dihydrolipoyl acyl-transferase, dihydrolipoyl transacylase, E1b, E1b component, E1b component of the 2-oxo acid dehydrogenase complex, E2, EC 1.2.4.3, More

ECTree

     1 Oxidoreductases
         1.2 Acting on the aldehyde or oxo group of donors
             1.2.4 With a disulfide as acceptor
                1.2.4.4 3-methyl-2-oxobutanoate dehydrogenase (2-methylpropanoyl-transferring)

Storage Stability

Storage Stability on EC 1.2.4.4 - 3-methyl-2-oxobutanoate dehydrogenase (2-methylpropanoyl-transferring)

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STORAGE STABILITY
ORGANISM
UNIPROT
LITERATURE
-20°C, after concentration and dialysis into 50 mM Tris-HCl buffer, 0.1 mM EDTA, 0.1 mM EGTA, 1 mM benzamidine, 1 mM PMSF, 1 mM DTT, pH 7.3, multienzyme complex is stable for at least 2 months
-
-70°C, 10 mM Tris-HC1, pH 8.0, containing 0.01 mM EDTA, 0.2 M NaCI, 0.005% (v/v) 2-mercaptoethanol, and 50% (v/v) glycerol, 2 years, remains active
-
-70°C, 50 mM potassium phosphate buffer, pH 7.4, 0.1 mM EDTA, 0.2 mM thiamine diphosphate, 0.2 mM phenylmethylsulfonyl fluoride, stable for at least 3 weeks
-
-70°C, enzyme complex is stable for more than 8 months
-
-70°C, multienzyme complex is stable for at least 2 years
-
0-5°C, rapid loss of 20-30% of the activity, then stable for 3-4 months
-
0°C, glycerol buffer, 20% loss of activity after 24 h
-