Hydrogen Sulfide Oxidation is Coupled to Oxidative Phosphorylation in Mitochondria of Solemya reidi

Solemya reidi, a gutless clam found in sulfide-rich habitats, contains within its gills bacterial symbionts thought to oxidize sulfur compounds and provide a reduced carbon food source to the clam. However, the initial step or steps in sulfide oxidation occur in the animal tissue, and mitochondria i...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 1986-08, Vol.233 (4763), p.563-566
Main Authors: Powell, Mark A., Somero, George N.
Format: Article
Language:English
Subjects:
Bacteria
Biochemistry
Biological and medical sciences
Cell growth
Cell lines
Clams
Cyanides
Digestive system
Fundamental and applied biological sciences. Psychology
Health aspects
Invertebrates
Marine
Marine biology
Mitochondria
Mollusca
Oxidation
Oxygen
Oxygen consumption
Phosphorylation
Physiological aspects
Physiology. Development
Solemya reidi
Spleen cells
Sulfides
Sulfur
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Summary:Solemya reidi, a gutless clam found in sulfide-rich habitats, contains within its gills bacterial symbionts thought to oxidize sulfur compounds and provide a reduced carbon food source to the clam. However, the initial step or steps in sulfide oxidation occur in the animal tissue, and mitochondria isolated from both gill and symbiont-free foot tissue of the clam coupled the oxidation of sulfide to oxidative phosphorylation [adenosine triphosphate (ATP) synthesis]. The ability of Solemya reidi to exploit directly the energy in sulfide for ATP synthesis is unprecedented, and suggests that sulfide-habitat animals that lack bacterial symbionts may also use sulfide as an inorganic energy source.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.233.4763.563