| lipoamide | <biochemistry> The functional form of lipoic acid in which the carboxyl group is attached to protein by an amide linkage to a lysine amino group. (18 Nov 1997) |
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| lipoamide dehydrogenase | <enzyme> An enzyme that regenerates lipoamide from the reduced form dihydrolipoamide. (18 Nov 1997) |
| lipoamide disulfide | Oxidised lipoic acid in amide combination with the &vepsilon;-amino group of an l-lysyl residue of pyruvic acid dehydrogenase. (05 Mar 2000) |
| lipoamide reductase | <enzyme> An enzyme oxidizing dihydrolipoamide at the expense of NAD+; completes the oxidative decarboxylation of pyruvate; a part of several enzyme complexes (e.g., alpha-ketoglutarate dehydrogenase complex). Decreased activity leads to neuronal loss in brain resulting in psychomotor retardation. Synonym: coenzyme factor, lipoamide dehydrogenase, lipoamide reductase (NADH), lipoyl dehydrogenase. (05 Mar 2000) |
| pyruvate dehydrogenase (lipoamide) | An oxidoreductase catalyzing conversion of pyruvate and (oxidised) lipoamide to CO2 and S6-acetyldihydrolipoamide in two successive reactions: the first between pyruvate and thiamin pyrophosphate to yield CO2 and alpha-hydroxyethylthiamin pyrophosphate (active pyruvate); the second between the last named and lipoamide to regain the thiamin pyrophosphate and yield S6-acetylhydrolipoamide. Compare: alpha-ketodecarboxylase. (05 Mar 2000) |
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| pyruvate dehydrogenase (lipoamide)-phosphatase | <enzyme> (pyruvate dehydrogenase (lipoamide))-phosphate phosphohydrolase. A mitochondrial enzyme that catalyses the hydrolytic removal of a phosphate on a specific seryl hydroxyl group of pyruvate dehydrogenase, reactivating the enzyme complex. Registry number: EC 3.1.3.43 (12 Dec 1998) |
| (pyruvate dehydrogenase (lipoamide))kinase | Registry number: EC 2.7.1.99 Synonym: pyruvate dehydrogenase kinase (26 Jun 1999) |