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Na + ‐driven ATP synthesis in Methanobacterium thermoautotrophicum can be modulated with sodium ion concentrations in the growth medium
Author(s) -
Šmigáň Peter,
Horovská Ľubica,
Greksák Miloslav
Publication year - 1988
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(88)80990-6
Subject(s) - methanobacterium , sodium , chemistry , atpase , ion , biophysics , ion transporter , biochemistry , nuclear chemistry , membrane , biology , enzyme , organic chemistry , archaea , gene
Methane formation by nongrowing cells of Methanobacterium thermoautotrophicum ΔH can be enhanced with sodium ions only when the cells were originally grown in the presence of a low (5 mM) concentration of NaCl. ATP synthesis in the cells driven by an artificially imposed Na + gradient can be modulated by changing the sodium ion concentration in the growth medium while H + gradient‐driven ATP synthesis does not depend on it. Stimulation of the entire ATPase activity with Na + in permeabilized cells depends also on the Na + concentration in the growth medium. The results obtained might indicate the presence of an inducible Na + ‐translocating ATPase in Methanobacterium thermoautotrophicum .