The pyruvate dehydrogenase complex (PDH complex) of Escherichia coli and its pyruvate dehydrogenase component (E1) are rapidly inactivated by low concentrations of fluoropyruvate in a thiamin pyrophosphate (TPP) dependent process. The inactivation rates for the PDH complex and for its
Biochemistry and cell biology = Biochimie et biologie cellulaire, 65(5), 458-466 (1987-05-01)
The purpose of these experiments was to examine the factors which regulate ethanol metabolism in vivo. Since the major pathway for ethanol removal requires flux through hepatic alcohol dehydrogenase, the activity of this enzyme was measured and found to be
Variants of the Escherichia coli 1-lip pyruvate dehydrogenase multienzyme complex (1-lip PDHc) with the C259N and C259S substitutions in the putative thiamin diphosphate-(ThDP-) binding motif of the pyruvate dehydrogenase component (E1, EC 1.2.4.1) were characterized. Single substitutions were made at
The stereochemistry of the transcarboxylase-catalyzed carboxylation of 3-fluoropyruvate has been studied by using fluorine NMR of unpurified reaction mixtures. When the product 3-fluorooxaloacetate was trapped by using malate dehydrogenase, only the 2R,3R diastereomer of 3-fluoromalate was formed. The fluoromethyl group
European journal of biochemistry, 114(2), 407-411 (1981-02-01)
Free pyruvate dehydrogenase component of the Escherichia coli K12 pyruvate dehydrogenase complex was isolated from a mutant lacking the dihydrolipoamide transacetylase component. The procedure, employing three chromatographic steps, yields a product that is electrophoretically pure. The purified enzyme reassociates with
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