PMID: 8595973Aug 1, 1995Paper

Regulation of alternative oxidase activity in higher plants

Journal of Bioenergetics and Biomembranes
D A Day, J T Wiskich

Abstract

Plant mitochondria contain two terminal oxidases: cytochrome oxidase and the cyanide-insensitive alternative oxidase. Electron partioning between the two pathways is regulated by the redox poise of the ubiquinone pool and the activation state of the alternative oxidase. The alternative oxidase appears to exist as a dimer which is active in the reduced, noncovalently linked form and inactive when in the oxidized, covalently linked form. Reduction of the oxidase in isolated tobacco mitochondria occurs upon oxidation of isocitrate or malate and may be mediated by matrix NAD(P)H. The activity of the reduced oxidase is governed by certain other organic acids, notably pyruvate, which appear to interact directly with the enzyme. Pyruvate alters the interaction between the alternative oxidase and ubiquinol so that the oxidase becomes active at much lower levels of ubiquinol and competes with the cytochrome pathway for electrons. These requirements for activation of the alternative oxidase constitute a sophisticated feed-forward control mechanism which determines the extent to which electrons are directed away from the energy-conserving cytochrome pathway to the non-energy conserving alternative oxidase. Such a mechanism fits well with ...Continue Reading

References

Aug 23, 1991·Biochimica Et Biophysica Acta·A L Moore, J N Siedow
Nov 20, 1989·FEBS Letters·J Bodenstein-LangH Follmann
Feb 20, 1995·Archives of Biochemistry and Biophysics·M Ribas-CarboJ N Siedow
Jul 1, 1994·Plant Physiology·L McIntosh
Dec 1, 1987·Proceedings of the National Academy of Sciences of the United States of America·T E Elthon, L McIntosh
Dec 1, 1992·Plant Physiology·G C Vanlerberghe, L McIntosh
Nov 1, 1990·Plant Physiology·A G Rasmusson, I M Møller
Aug 1, 1993·Physiologia Plantarum·Albert C Purvis, Robert L Shewfelt

❮ Previous
Next ❯

Citations

Sep 5, 2012·Journal of Bioenergetics and Biomembranes·Hoang Thi Kim Hong, Akihiro Nose
Jun 1, 1997·Annual Review of Plant Physiology and Plant Molecular Biology·Greg C. Vanlerberghe, Lee McIntosh
May 12, 2012·Molecular Aspects of Medicine·Priyatham S MettuScott W Cousins
Apr 6, 2007·Plant Physiology and Biochemistry : PPB·Hanqing FengJun Ma
Sep 13, 2006·The FEBS Journal·Oscar JuárezJuan P Pardo
Jun 6, 2009·Physiologia Plantarum·Allison E McDonald
Dec 7, 2000·Biochimica Et Biophysica Acta·D A BertholdP Nordlund
Mar 5, 2009·Bioscience Reports·Lucas Damián DaurelioElena Graciela Orellano
Oct 27, 1997·Experimental Parasitology·A D MurphyN Lang-Unnasch
Aug 13, 2013·Biochimica Et Biophysica Acta·Alfredo Cabrera-OreficeSalvador Uribe-Carvajal
Sep 26, 2003·Biochimica Et Biophysica Acta·Ruth C HoltzapffelDavid A Day
Mar 10, 2015·Biochemistry. Biokhimii︠a︡·A G RogovR A Zvyagilskaya
Aug 12, 1998·Brazilian Journal of Medical and Biological Research = Revista Brasileira De Pesquisas Médicas E Biológicas·F E Sluse, W Jarmuszkiewicz
Jul 1, 2004·Critical Reviews in Biotechnology·Zhonghu BaiBrian McNeil
Nov 12, 2005·Bioscience Reports·Jirí Borecký, Aníbal E Vercesi
Oct 13, 2007·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Ken TakahashiHiroshi Osada
May 15, 2010·Bulletin of Environmental Contamination and Toxicology·Guzin KekecIrem Uzonur
Aug 7, 2014·Environmental Science and Pollution Research International·Lyudmila LyubenovaPeter Schröder
Mar 19, 2020·Journal of Plant Research·Motoka Nakamura, Ko Noguchi

❮ Previous
Next ❯

Related Concepts

Related Feeds

Bacterial Respiration

This feed focuses on cellular respiration in bacteria, known as bacterial respiration. Discover the latest research here.