Publikation:

Influence of sodium concentration on changes of membrane capacitance associated with the electrogenic ion transport by the Na,K-ATPase

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Datum

1998

Autor:innen

Sokolov, Valerij S.
Stukolov, S. M.
Darmostuk, A. S.

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URI (zitierfähiger Link)
http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-41264
DOI (zitierfähiger Link)
https://doi.org/10.1007/s002490050172
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Attribution-NonCommercial-NoDerivs 2.0 Generic

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Open Access Green

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Biologie: Publikationen
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Published

Erschienen in

European Biophysics Journal. 1998, 27(6), pp. 605-617. ISSN 0175-7571. eISSN 1432-1017. Available under: doi: 10.1007/s002490050172

Zusammenfassung

Electrogenic ion transport by the Na,K-ATPase was investigated in a model system of protein-containing membrane fragments adsorbed to a lipid bilayer. Transient Na+ currents were induced by photorelease of ATP from inactive caged ATP. This process was accompanied by a capacitance change of the membrane system. Two methods were applied to measure capacitances in the frequency range 1 to 6000 Hz. It was, however, dependent on Na+ concentration and on the membrane potential which was generated by the charge transferred. Below 5 mM Na+ a negative capacitance change was detected which may be assigned to electrogenic Na+ binding to cytoplasmic sites. It could be shown that the results obtained by experiments with the presented alternating current method contain the information which is determined by current-relaxation experiments with cell membranes.

Zusammenfassung in einer weiteren Sprache

Fachgebiet (DDC)
570 Biowissenschaften, Biologie

Schlagwörter

Na,K-ATPase, membrane capacitance, Dielectric properties, Ion movement, Electrogenicity

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ISO 690SOKOLOV, Valerij S., S. M. STUKOLOV, A. S. DARMOSTUK, Hans-Jürgen APELL, 1998. Influence of sodium concentration on changes of membrane capacitance associated with the electrogenic ion transport by the Na,K-ATPase. In: European Biophysics Journal. 1998, 27(6), pp. 605-617. ISSN 0175-7571. eISSN 1432-1017. Available under: doi: 10.1007/s002490050172
BibTex
@article{Sokolov1998Influ-8473,
  year={1998},
  doi={10.1007/s002490050172},
  title={Influence of sodium concentration on changes of membrane capacitance associated with the electrogenic ion transport by the Na,K-ATPase},
  number={6},
  volume={27},
  issn={0175-7571},
  journal={European Biophysics Journal},
  pages={605--617},
  author={Sokolov, Valerij S. and Stukolov, S. M. and Darmostuk, A. S. and Apell, Hans-Jürgen}
}
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