Comparative bioenergetics of sulfate reduction in Desulfovibrio and Desulfotomaculum spp.

Journal of Bacteriology
C L Liu, H D Peck

Abstract

Extracts of Desulfotomaculum nigrificans, Desulfotomaculum orientis, and Desulfotomaculum ruminis exhibit low levels of inorganic pyrophosphatase but were found to have high levels of pyrophosphate:acetate phosphotransferase. Conversely, extracts of Desulfovibrio gigas, Desulfovibrio vulgaris, and Desulfovibrio desulfuricans Norway 4 were shown to have high levels of inorganic pyrophosphatase but negligible amounts of pyrophosphate:acetate phosphotransferase. Both enzymes are reductant activated and appear to have an analogous function in removing pyrophosphate formed during the activation of sulfate. Conservation of the bond energy of pyrophosphate in Desulfotomaculum eliminates the necessity for invoking electron-transfer-coupled phosphorylation to account for the growth of these bacteria on lactate plus sulfate. Relative growth yields of Desulfovibrio vulgaris and Desulfotomaculum orientis on lactate plus sulfate indicate that the latter does not carry out significant electron-transfer-coupled phosphorylation in this mode of growth.

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Citations

Aug 1, 1992·Biotechnology and Bioengineering·M A ReisM J Carrondo
Oct 6, 2000·Annual Review of Microbiology·H Cypionka
Mar 10, 2006·Applied Microbiology and Biotechnology·Dae-Yeol Cheong, Conly L Hansen
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Apr 21, 2012·Proceedings of the National Academy of Sciences of the United States of America·Manuel KleinerNicole Dubilier
Dec 1, 1983·Applied and Environmental Microbiology·D L CrudenA J Markovetz
Jan 1, 1985·The International Journal of Biochemistry·E Kukko-Kalske, J Heinonen

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