Sodium-dependent succinae uptake in purple bacterium Ectothiorhodospira shaposhnikovii Biochimica et Biophysica Actaстатья
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Дата последнего поиска статьи во внешних источниках: 8 февраля 2017 г.
Аннотация:Succinate, malate and fumarate uptake in purple sulfur bacterium Ectothio-
rhodospira shaposhnikovii, strain 1 K MSU, obligatorily depends on the
presence of Na*. Other monovalent cations such as K +, Li ÷, NH~ could not
replace Na ÷. Experiments with energy<tepleted cells have shown that succinate
uptake against its concentration gradient can be energized by artificially
imposed sodium gradients (ApNa).
An artificial membrane potential (inside negative) inhibited ApNa<lriven
succinate uptake at pH 7.0 but stimulated it at pH 9.0.
The results confirm the suggestion that succinate uptake in E. shaposhnikovii
is carried out in symport with Na ÷.