Energetic aspects of CO oxidation in desulfovibrio desulfuricans
In cell suspension of Desulfovibrio desulfuricans B-1388, oxidation of CO as the only energy source is associated with reduction of SO42-. After a 2-h incubation of cells in 8% CO, 81% of the gas is converted. Oxidation of 1 mole CO results in formation of 0.23 mole H2S. Intracellular ATP content increases from 2.5 (control) to 8.3 nmoles/mg (during CO conversion). Dinitrophenol inhibits sulfate reduction and CO oxidation. CO dehydrogenase was detected in cytoplasmic and membrane cell fractions (59 and 34%, respectively).
Tarasova
NB
Kazan Institute of Biology, Kazan Research Center, Russian Academy of Sciences, Kazan, 420503, Russia. tarasova@sci.kcn.ru.
Zolotov
AV
Petrova
OE