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. 1971 Mar;105(3):1006–1014. doi: 10.1128/jb.105.3.1006-1014.1971

Effects of Molybdate and Selenite on Formate and Nitrate Metabolism in Escherichia coli

Robert L Lester a,1, J A DeMoss a
PMCID: PMC248530  PMID: 4926673

Abstract

The effects of adding molybdate and selenite to a glucose-minimal salts medium on the formation of enzymes involved in the anaerobic metabolism of formate and nitrate in Escherichia coli have been studied. When cells were grown anaerobically in the presence of nitrate, molybdate stimulated the formation of nitrate reductase and a b-type cytochrome, resulting in cells that had the capacity for active nitrate reduction in the absence of formate dehydrogenase. Under the same conditions, selenite in addition to molybdate was required for forming the enzyme system which permits formate to serve as an effective electron donor for nitrate reduction. When cells were grown anaerobically on a glucose-minimal salts medium without nitrate, active hydrogen production from formate as well as formate dehydrogenase activity depended on the presence of both selenite and molybdate. The effects of these metals on the formation of formate dehydrogenase was blocked by chloramphenicol, suggesting that protein synthesis is required for the increases observed. It is proposed that the same formate dehydrogenase is involved in nitrate reduction, hydrogen production, and in aerobic formate oxidation.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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