Effect of diet and starvation on the activity state of branched-chain 2-oxo-acid dehydrogenase complex in rat liver and heart.
In rats fed a high-protein diet, the branched-chain 2-oxo-acid dehydrogenase complex in liver was essentially fully active and its activity state was unaffected by subsequent starvation for 48 h. Feeding with a low-protein diet led to a decrease in the activity state which was essentially reversed by 48 h of starvation. In heart, the enzyme was primarily inactive (activity state 18%) in rats fed a high-protein diet, with both low-protein diet and starvation leading to a further decrease in the activity state.
Solomon
M
M
Department of Biochemistry, University of Newcastle upon Tyne, U.K.
Cook
K G
KG
Yeaman
S J
SJ
D042942:3-Methyl-2-Oxobutanoate Dehydrogenase (Lipoamide); D000818:Animals; D004044:Dietary Proteins / Q000008:administration & dosage / Q000494:pharmacology*; D004789:Enzyme Activation / Q000187:drug effects; D007658:Ketone Oxidoreductases / Q000032:analysis*; D008929:Mitochondria, Heart / Q000201:enzymology*; D008930:Mitochondria, Liver / Q000201:enzymology*; D009097:Multienzyme Complexes / Q000032:analysis*; D051381:Rats; D013217:Starvation / Q000201:enzymology*
D004044:Dietary Proteins; D009097:Multienzyme Complexes; D007658:Ketone Oxidoreductases; D042942:3-Methyl-2-Oxobutanoate Dehydrogenase (Lipoamide)