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  • Title: Hybrid respiration in the denitrifying mitochondria of Fusarium oxysporum.
    Author: Takaya N, Kuwazaki S, Adachi Y, Suzuki S, Kikuchi T, Nakamura H, Shiro Y, Shoun H.
    Journal: J Biochem; 2003 Apr; 133(4):461-5. PubMed ID: 12761293.
    Abstract:
    Induction of the mitochondrial nitrate-respiration (denitrification) system of the fungus Fusarium oxysporum requires the supply of low levels of oxygen (O(2)). Here we show that O(2) and nitrate (NO(3)(-)) respiration function simultaneously in the mitochondria of fungal cells incubated under hypoxic, denitrifying conditions in which both O(2) and NO(3)(-) act as the terminal electron acceptors. The NO(3)(-) and nitrite (NO(2)(-)) reductases involved in fungal denitrification share the mitochondrial respiratory chain with cytochrome oxidase. F. oxysporum cytochrome c(549) can serve as an electron donor for both NO(2)(-) reductase and cytochrome oxidase. We are the first to demonstrate hybrid respiration in respiring eukaryotic mitochondria.
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