Nitrate reductase and respiratory adaptation in Bacillus stearothermophilus.

Journal of Bacteriology
R J DOWNEY

Abstract

Downey, R. J. (University of Notre Dame, Notre Dame, Ind.). Nitrate reductase and respiratory adaptation in Bacillus stearothermophilus. J. Bacteriol. 91:634-641. 1966.-Bacillus stearothermophilus 2184 required nitrate to grow in the absence of oxygen. Like many facultative microorganisms, the growth obtained anaerobically was considerably less than that obtained aerobically, even though the dissimilatory reduction of nitrate is, in effect, anaerobic respiration. The ability to reduce nitrate depended on the induction of nitrate reductase. Although oxygen at low levels did not retard induction of the enzyme, enzyme synthesis was considerably lessened by aeration. A semisynthetic medium containing nitrate supported aerobic growth of the thermophile but did not support anaerobic growth. The adaptation to nitrate resulted in a decrease in the level of cytochrome oxidase normally present in aerobically grown cells. Although the aerobic oxidation of succinate by the respiratory enzymes from aerobically grown cells was inhibited by 2-N-heptyl-4-hydroxyquinoline-N-oxide, the anaerobic oxidation of succinate by nitrate in a similar preparation from nitrate-adapted cells was not. The nitrate reductase in the bacillus was strongly inhibi...Continue Reading

Citations

Mar 1, 1988·Microbial Ecology·G J Macmichael
Mar 1, 1968·The Journal of Applied Bacteriology·L L Campbell, B Pace
May 1, 1972·Journal of Bacteriology·G A McFeters, J T Ulrich
Dec 1, 1973·Bacteriological Reviews·W J Payne
Feb 1, 1979·Journal of Bacteriology·D M Yordy, E A Delwiche
Apr 1, 1991·Journal of Bacteriology·P A KetchumW J Payne

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