Koenig 1969 Biochem J
| König T, Nicholls DG, Garland PB (1969) The inhibition of pyruvate and Ls(+)-isocitrate oxidation by succinate oxidation in rat liver mitochondria. Biochem J 114:589-96. |
Koenig T, Nicholls DG, Garland PB (1969) Biochem J
Abstract: 1. The effects of succinate oxidation on pyruvate and also isocitrate oxidation by rat liver mitochondria were studied. 2. Succinate oxidation was without effect on pyruvate and isocitrate oxidation when respiration was maximally activated with ADP. 3. When respiration was partially inhibited by atractylate, succinate oxidation severely inhibited the oxidation of pyruvate and isocitrate. 4. This inhibitory effect of succinate was associated with a two- to three-fold increase in the reduction of mitochondrial NAD(+) but no change in the reduction of cytochrome b. 5. It is concluded that, in the partially energy-controlled state, respiration is more severely inhibited at the first phosphorylating site than at the other two. 6. The effects of succinate oxidation are compared with those of palmitoylcarnitine oxidation. It is concluded that a rapid flow of electrons directly into the respiratory chain at the level of cytochrome b is in itself inadequate to inhibit the oxidation of intramitochondrial NADH. 7. The effects of succinate oxidation on pyruvate oxidation were similar in rat heart and liver mitochondria.
• Bioblast editor: Gnaiger E
Cited by
- Gnaiger E (2020) Mitochondrial pathways and respiratory control. An introduction to OXPHOS analysis. 5th ed. Bioenerg Commun 2020.2. https://doi.org/10.26124/bec:2020-0002
Labels:
Organism: Rat
Tissue;cell: Heart, Liver
Preparation: Isolated mitochondria
Coupling state: LEAK, OXPHOS
Pathway: F, N, S, NS
BEC 2020.2
