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Energy conservation in Nitrobacter

A. Freitag, E. Bock
DOI: http://dx.doi.org/10.1111/j.1574-6968.1990.tb03989.x 157-162 First published online: 1 January 1990


The generation of ATP and NADH in total cells of Nitrobacter was measured under aerobic and anaerobic conditions. NADH synthesis was driven by an ATP independent reaction with nitrite or nitric oxide as electron donors. The rate of NADH formation was about 200 times higher, if nitric oxide instead of nitrite served as electron donor. Approximately 2 mol nitric oxide were needed for reduction of 1 mol NAD+. Nitrite caused an end-product inhibition of the nitric oxide induced NADH synthesis. ATP was synthesized by NADH oxidation with oxygen and nitrate as terminal electron acceptors.

Key words
  • Nitrobacter sp
  • Nitric oxide metabolism
  • NADH synthesis
  • ATP generation

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