A hydrogenosome is a membrane-enclosed organelle of some anaerobic ciliates, trichomonads, fungi and a few metazoa. The hydrogenosomes of trichomonads (the best studied) produce ATP by a complex metabolic cycle. Unlike mitochondria, this cycle does not use oxygen. It is thought that hydrogenosomes evolved from mitochondria; their structure is rather similar.
In 2010, scientists reported their discovery of the first known anaerobic metazoans with hydrogenosome-like organelles. These organisms were Loricifera living in sediments under deep-water brine pools like the L'Atalante basin. These brine pools are completely without any oxygen (anoxic).
References[change | change source]
- Müller M, Lindmark DG (February 1978). "Respiration of hydrogenosomes of Tritrichomonas foetus. II. Effect of CoA on pyruvate oxidation". J. Biol. Chem. 253 (4): 1215–8. PMID 624726. http://www.jbc.org/cgi/pmidlookup?view=long&pmid=624726.
- Danovaro R et al (April 2010). "The first metazoa living in permanently anoxic conditions". BMC Biol 8 (1): 30. doi:10.1186/1741-7007-8-30. PMC 2907586. PMID 20370908. http://www.biomedcentral.com/1741-7007/8/30.