Plant Uncoupling Mitochondrial Protein and Alternative Oxidase: Energy Metabolism and Stress

@article{Boreck2005PlantUM,
  title={Plant Uncoupling Mitochondrial Protein and Alternative Oxidase: Energy Metabolism and Stress},
  author={J. Boreck{\'y} and A. Vercesi},
  journal={Bioscience Reports},
  year={2005},
  volume={25},
  pages={271-286}
}
Energy-dissipation in plant mitochondria can be mediated by inner membrane proteins via two processes: redox potential-dissipation or proton electrochemical potential-dissipation. Alternative oxidases (AOx) and the plant uncoupling mitochondrial proteins (PUMP) perform a type of intrinsic and extrinsic regulation of the coupling between respiration and phosphorylation, respectively. Expression analyses and functional studies on AOx and PUMP under normal and stress conditions suggest that the… Expand
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References

SHOWING 1-10 OF 144 REFERENCES
The plant uncoupling protein homologues: a new family of energy-dissipating proteins in plant mitochondria.
TLDR
The simultaneous occurrence in plant mitochondria of two putative energy-dissipating systems, namely UCP which dissipate the proton motive force, and alternative oxidase (AOX) which dissipates the redox potential, raises the question of their functional interactions. Expand
Plant uncoupling mitochondrial proteins.
TLDR
Estimation analyses and functional studies suggest that UCPs regulate energy metabolism in the cellular responses to stress through regulation of the electrochemical proton potential (Deltamu(H)+) and production of reactive oxygen species. Expand
Activity and functional interaction of alternative oxidase and uncoupling protein in mitochondria from tomato fruit.
  • F. Sluse, W. Jarmuszkiewicz
  • Biology, Medicine
  • Brazilian journal of medical and biological research = Revista brasileira de pesquisas medicas e biologicas
  • 2000
TLDR
The ADP/O method facilitates description of the kinetics of energy-dissipating pathways and of ATP synthase when state 3 respiration is decreased by limitation of oxidizable substrate. Expand
Free fatty acids regulate the uncoupling protein and alternative oxidase activities in plant mitochondria
TLDR
Two energy‐dissipating systems, an alternative oxidase and an uncoupling protein, are known to exist in plant mitochondria and it can be proposed that these dissipating systems work sequentially during the life of the plant cell, since a high level of free fatty acid‐induced uncoupled protein activity excludes alternative oxid enzyme activity. Expand
Uncoupling proteins outside the animal and plant kingdoms: functional and evolutionary aspects
The appearance of intracellular oxidative phosphorylation at the time of acquisition of mitochondria in Eukarya was very soon accompanied by the emergence of uncoupling protein, a carrier specializedExpand
ALTERNATIVE OXIDASE: From Gene to Function.
TLDR
This dynamic system of coarse and fine control may function to balance upstream respiratory carbon metabolism and downstream electron transport when these coupled processes become imbalanced as a result of changes in the supply of, or demand for, carbon, reducing power, and ATP. Expand
Control of plant mitochondrial respiration.
TLDR
The extent to which kinetic modelling and 'top-down' metabolic control analysis improve the insight in phenomena related to plant mitochondrial respiration is emphasised. Expand
Activation of the potato plant uncoupling mitochondrial protein inhibits reactive oxygen species generation by the respiratory chain
TLDR
It is shown that the inhibition of PUMP activity in potato tuber mitochondria significantly increases mitochondrial H2O2 generation, while PUMP substrates, such as linoleic acid, reduce mitochondrial H1N1 generation. Expand
PLANT MITOCHONDRIA AND OXIDATIVE STRESS: Electron Transport, NADPH Turnover, and Metabolism of Reactive Oxygen Species.
  • I. Møller
  • Biology, Medicine
  • Annual review of plant physiology and plant molecular biology
  • 2001
TLDR
The alternative oxidase and possibly NDin(NADH) function to limit mitochondrial ROS production by keeping the ETC relatively oxidized, together with small antioxidants such as glutathione, that help remove ROS. Expand
Plant Mitochondrial Electron Transfer and Molecular Biology.
TLDR
Except for glycolysis, all of the metabolic steps of aerobic respiration take place in the mitochondrion, and the coupled processes of mitochondrial electron transfer and ATP synthe- sis. Expand
...
1
2
3
4
5
...