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J. Biol. Chem., Vol. 261, Issue 16, 7109-7111, Jun, 1986

The beta-subunit of the F1F0-ATPase is conserved in mycoplasmas

D Zilberstein, MH Shirvan, MF Barile and S Rottem

Monospecific polyclonal antibodies that were generated against the beta- subunit of Escherichia coli ATPase (F1Fo) cross-reacted with a protein present in the cells of several Mycoplasma and Acholeplasma species. In Mycoplasma gallisepticum, the reactive protein was found almost exclusively in the cell membrane. This protein had an apparent molecular mass of approximately 52 kDa and could not be released from the membranes by repeated washings with either low or high salt solutions in the presence or absence of EDTA. The reactive protein was found to be catalytically active, exhibiting up to 44% of the total membrane-bound ATPase activity. We suggest that mycoplasmas possess a F1Fo-ATPase which undergoes structural modification(s) allowing its integration into the membrane.
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