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Mitochondrial respiration is controlled by Allostery, Subunit Composition and Phosphorylation Sites of Cytochrome c Oxidase: A trailblazer's tale - Bernhard Kadenbach

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MITOCHONDRION
卷 60, 期 -, 页码 228-233

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ELSEVIER SCI LTD
DOI: 10.1016/j.mito.2021.08.015

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Kadenbach's research on mitochondrial cytochrome c oxidase revealed its defects in human muscle and neuronal cells with increasing age, leading to mitochondrial diseases. He proposed a theory on the causes of oxidative stress, aging, and related diseases.
In memoriam of Bernhard Kadenbach: Although the main focus of his research was the structure, function, and regulation of mitochondrial cytochrome c oxidase (CytOx), he earlier studied the mitochondrial phosphate carrier and found an essential role of cardiolipin. Later, he discovered tissue-specific and developmental specific protein isoforms of CytOx. Defective activity of CytOx is found with increasing age in human muscle and neuronal cells resulting in mitochondrial diseases. Kadenbach proposed a theory on the cause of oxidative stress, aging, and associated diseases stating that allosteric feedback inhibition of CytOx at high mitochondrial ATP/ADP ratios is essential for healthy living while stress-induced reversible dephosphorylation of CytOx results in the formation of excessive reactive oxygen species that trigger degenerative diseases. This article summarizes the main discoveries of Kadenbach related to mammalian CytOx and discusses their implications for human disease.

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