hydrogenosome


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hydrogenosome

(hī-drō'jen'ō-sōm),
An ATP and hydrogen producing organelle in anaerobic eukaryocytes, including Trichomonas and Giardia, having a double membrane and thought by some to be a mitochondrial homologue.
References in periodicals archive ?
In the hydrogenosome of anaerobic fungi, the metabolic pathway was also stimulated as revealed by increased acetate production.
However, the metabolic pathway of anaerobic fungi, especially in the presence of methanogens, needs to be further investigated in the cytosol as well as in the hydrogenosome.
1967) Hydrogenosome, a cytoplasmic organelle of the anaerobic flagellate Tritrichomonas foetus, and its role in pyruvate metabolism.
The anaerobic fungi are amitochondrial organisms and have a hydrogenosome instead for energy production (Yarlett et al.
A hydrogenosome with pyruvate formate-lyase: anaerobic chytrid fungi use an alternative route for pyruvate catabolism.
An iron-dependent hydrogenase (Fe-hydrogenase), which gives the hydrogenosome its name, transfers electrons from reduced ferredoxin to two protons to make hydrogen gas (Lindmark and Muller, 1973; Muller, 1993; Payne et al.
The reduced ferredoxin is produced within the hydrogenosome by pyruvate:ferredoxin oxidoreductase (PFOR), which decarboxylates pyruvate to acetyl-CoA and [CO.
In contrast, host cells remaining in an anaerobic environment provided the opportunity for the endosymbiont to shed its aerobic metabolism and become a hydrogenosome.
While organelles called mitochondria power most eukaryotic cells, hydrogenosomes replace them in a few instances.
Certain anaerobic ciliates, flagellates, and rumen fungi have also apparently lost mitochondria and have often gained hydrogenosomes.
Some one-celled creatures depend on such organisms to take the hydrogen, along with other products, from the hydrogenosomes and turn it into user-friendly metabolites for the host cell (SN: 4/18/98, p.