Alternative oxidase and plant stress tolerance - PMC
Alternative oxidase (AOX) is one of the terminal oxidases of the plant mitochondrial electron transport chain. AOX acts as a means to relax the highly coupled and tensed electron transport process in mitochondria thus providing and maintaining the much needed metabolic homeostasis by directly reducing oxygen to water.
Alternative Oxidase: From Molecule and Function to Future …
2024年3月4日 · Alternative oxidase (AOX), a ubiquinol oxidase, introduces a branch point into the respiratory electron transport chain, bypassing complexes III and IV and resulting in cyanide-resistant respiration. Previously, AOX was thought to be limited to plants and some fungi and protists but recent work has demonstrated the presence of AOX in most ...
A novel and stress adaptive alternative oxidase derived from ...
2017年9月7日 · Alternative oxidase (AOX) is a mitochondrial inner-membrane oxidase that accepts electrons directly from ubiquinol and reduces oxygen to water without involving cytochrome-linked electron...
Photosynthesis, respiration and growth: A carbon and energy …
2020年5月1日 · Mitochondrial alternative oxidase lowers the ATP yield of plant respiration. Alternative oxidase optimizes photosynthetic energy (ATP, NADPH) and carbon pools. Alternative oxidase benefits growth under stress conditions such as water deficit.
Alternative oxidases in Arabidopsis: A comparative analysis of ...
2006年7月1日 · The alternative oxidase (Aox), which catalyses cyanide insensitive respiration, has been studied in a wide variety of plant species over the last 40 years. In voodoo lily (Sauromatum guttatum), Aox is expressed at high levels during flowering and was used as a model to initially clone Aox [1].
Alternative Oxidase: A Mitochondrial Respiratory Pathway to
2013年3月26日 · Alternative oxidase (AOX) is a non-energy conserving terminal oxidase in the plant mitochondrial electron transport chain. While respiratory carbon oxidation pathways, electron transport, and ATP turnover are tightly coupled processes, AOX provides a means to relax this coupling, thus providing a degree of metabolic homeostasis to carbon and ...
Signal Pathways for Regulation of Plant Alternative Oxidase …
2022年1月31日 · Along with the main (cytochrome) pathway, the inner membrane of plant mitochondria houses an alternative pathway (AP) via terminal oxidase called alternative oxidase (AOX). AOX that catalyzes four-electron reduction of …
ALTERNATIVE OXIDASE: From Gene to Function | Annual Reviews
Plants, some fungi, and protists contain a cyanide-resistant, alternative mitochondrial respiratory pathway. This pathway branches at the ubiquinone pool and consists of an alternative oxidase encoded by the nuclear gene Aox1. Alternative pathway respiration is only linked to proton translocation at Complex 1 (NADH dehydrogenase).
Function of the alternative oxidase: is it still a scavenger?
2002年11月1日 · The alternative oxidase is a respiratory chain protein found in all higher plants, fungi, non-fermentative yeasts and trypanosomes. Its primary structure suggests that it is a new member of the di-iron carboxylate protein family.
The Alternative Oxidase: in vivo Regulation and Function
2008年6月28日 · About 10 years ago, two activation mechanisms were discovered in isolated mitochondria, namely activation by reducing sulfur bonds in the protein and activation by an allosteric effect of pyruvate. It was proposed that plants would have a regulatory mechanism to modify alternative oxidase activity in vivo.