The temperature dependence of oxidative phosphorylation and of the activity of various enzyme systems in liver mitochondria from cold- and warm-blooded animals.

@article{Smith1973TheTD,
  title={The temperature dependence of oxidative phosphorylation and of the activity of various enzyme systems in liver mitochondria from cold- and warm-blooded animals.},
  author={C. Smith},
  journal={Comparative biochemistry and physiology. B, Comparative biochemistry},
  year={1973},
  volume={46 3},
  pages={
          445-61
        }
}
  • C. Smith
  • Published 1973
  • Biology, Medicine
  • Comparative biochemistry and physiology. B, Comparative biochemistry
1. 1. The addition of bovine serum albumin to the reaction mixture gives improved coupling with isolated trout liver mitochondria, but the addition of Mg2+ has an opposite effect owing to stimulation of State IV respiration. 2. 2. The temperature dependence over the range 5–25°C of State III respiration as well as succinoxidase and NADH oxidase activities is significantly less for fish than for mammalian or avian mitochondria. The possible adaptive value of this situation is discussed… Expand
The temperature dependence of State IV respiration, the calcium uptake system, and the activity of the calcium ionophore A23187 in mitochondria from endo- and ectothermic animals.
  • C. Smith
  • Chemistry, Medicine
  • Comparative biochemistry and physiology. B, Comparative biochemistry
  • 1978
TLDR
The temperature dependence of the activity of the ionophore A23187 was investigated by measuring the increase in oxygen uptake following a sub-maximal dose of this drug and a linear relation was found for rainbow trout but in this case the rat curves showed only a single inflection point. Expand
The temperature dependence of the response to valinomycin and gramicidin by isolated liver mitochondria from warm- and cold-blooded animals.
  • C. Smith
  • Chemistry, Medicine
  • Comparative biochemistry and physiology. B, Comparative biochemistry
  • 1974
TLDR
The possible effect of configurational changes in the mitochondrial membranes is considered in conjunction with the differing modes of action of these two antibiotics, and activation energy for gramicidin is significantly greater than that for valinomycin. Expand
The effect of season and experimental temperature on the rates of oxidative phosphorylation of liver and muscle mitochondria from the tench. Tinca tinca.
  • V. Pye, W. Wieser, M. Zech
  • Biology, Medicine
  • Comparative biochemistry and physiology. B, Comparative biochemistry
  • 1976
TLDR
At low experimental temperatures the Km-values of succinate driven mitochondrial respiration are much higher in the muscles than in the liver, particularly in winter fish, which explains the very low respiratory rate of muscle mitochondria in winter when the substrate is succinate. Expand
Temperature and the regulation of activity of some mitochondrial enzyme systems in ecto- and endo-thermic animals
TLDR
It is concluded that the possibility is not excluded that entropy may be a more important variable than enthalpy in the action of these enzymes in ectothermic animals. Expand
The effects of long chain fatty acids on the respiration of liver mitochondria of cold and warm acclimated rat, pigeon and trout
TLDR
A mechanism for the regulation of fatty acid oxidation in mitochondria of homeotherms is proposed stressing the role of free fatty acids and their possible role in the evolution of endothermy. Expand
Effects of pH and Temperature on the Kinetics of Pyruvate Oxidation by Muscle Mitochondria from Rainbow Trout (Oncorhynchus mykiss)
We measured the kinetics of pyruvate oxidation by mitochondria of rainbow trout (Oncorhynchus mykiss) red muscle and the kinetics of pyruvate decarboxylation by partially purified pyruvateExpand
Temperature dependence of ADP/ATP translocation in mitochondria.
The temperature dependence of the adenine nucleotide exchange in mitochondria has been determined by employing a rapid mixing, quenching and sampling apparatus and the inhibitor quench-back exchangeExpand
Mitochondrial enzymes of tropical fish: a comparison with fish from cold-waters.
  • D. Irving, K. Watson
  • Biology, Medicine
  • Comparative biochemistry and physiology. B, Comparative biochemistry
  • 1976
TLDR
The fatty acid composition of the tropical fish mitochondrial membranes was found to be more saturated than in previously reported cold-water fish motochondrial membranes and the heart mitochondrial enzymes were also more temperature-stable than the corresponding enzymes of the liver. Expand
Discontinuities in the arrhenius plots of mitochondrial membrane-bound enzyme systems from a poikilotherm: Acclimation temperature of carp affects transition temperatures
  • E. Wodtke
  • Biology
  • Journal of comparative physiology
  • 2004
TLDR
Evidence is presented for ‘breaks’ in the Arrhenius plots of succinate and cytochrome oxidase systems of mitochondria from carp liver and red epaxial muscle and the acclimation temperature dependency ofT* is discussed as a possible consequence of a lipid adaptation. Expand
Biochemical changes in blowfly flight muscle mitochondria following temperature acclimation
TLDR
Analysis of fatty acids from chloroform soluble mitochondrial lipids show significant changes with temperature acclimation: the proportion of palmitoleic acid (16:1) increases in both species of blowfly with increasing Acclimation temperature: with decreasing acclimations temperature there is an increase in long chain unsaturated fatty acids. Expand
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The translocation of ADP and ATP through the inner membrane is rate-limiting for the process of oxidative phosphorylation in rat-liver mitochondria. Expand
Effects of temperature on oxidative phosphorylation of liver mitochondria from hamster, rat and squirrel monkey.
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Changes in the temperature sensitivity of this enzyme system in mitochondria from hibernating hamsters which distinguish them from mitochondria of rats, monkeys and active hamsters are revealed and may be of adaptive significance both in maintenance of functional integrity of liver cells during hibernation and in contributing to rapid rewarming during arousal. Expand
Thermostability of some mitochondrial enzymes of lower vertebrates. I. General survey.
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  • Biology, Medicine
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  • 1973
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In the fish and amphibian species a wide range of thermostability was found which appeared to be correlated with the normal thermal environments of the animals, and at least in the frog enzyme stability was not altered by acclimating the animals to different temperatures. Expand
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  • 1972
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Results were interpreted as indicating that SDH normally functions as a lipoprotein complex within the inner mitochondrial membrane and exhibits properties which maintain temperature-independent catalytic function in response to short-term and prolonged temperature fluctuations. Expand
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The effect of temperature acclimation upon succinic dehydrogenase activity from the epaxial muscle of the common goldfish (Carassius auratus L.)--II. Lipid reactivation of the soluble enzyme.
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  • Biology, Medicine
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TLDR
The results were interpreted as indicating that the increased specific activity of succinic dehydrogenase following a period of cold acclimation may be partly or in large part explained by underlying changes in membrane composition which regulate the activity rather than the quantity of this enzyme. Expand
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The experimental results given in the present paper lead to the conclusion that the nicotinamide nucleotide coenzyme reduced by the isocitrate dehydrogenase is not available to the respiratory chain and that, despite the presence ofNAD and an active nicotinamia nucleotide transhydrogenase, the reduced nucleotide must react with oxaloacetate, a process catalysed by malate dehydrogensase. Expand
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