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Potassium in Biological Systems

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Encyclopedia of Metalloproteins


Alkali cation binding sites and structure–functions relations; K+ dependent proteins

Definition of the Subject

This entry provides a comprehensive reference of the role of potassium ions in biological system with examples from bacteria, plant, and animal kingdoms. These involve mediation of ATPase activity, selective conductance across ion channels and pumps.

General Information

Potassium plays an important role in regulation of cellular electrolyte metabolism, electric signaling in cells, transport of essential nutrients, and enzymatic analysis. In alliance with other (i.e., sodium and chloride ions), it contributes to overall electrolyte balance of virtually all living organisms. It also assists in the conduction of nerve impulses. In this entry, various roles played by the potassium ion in mammals, bacteria, and plants will be briefly reviewed.

Potassium in Bacteria

K+is involved in regulation of osmotic pressure, activation of intracellular enzymes, regulation of...

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Correspondence to Sumukh Deshpande .

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Deshpande, S., Durdagi, S., Noskov, S.Y. (2013). Potassium in Biological Systems. In: Kretsinger, R.H., Uversky, V.N., Permyakov, E.A. (eds) Encyclopedia of Metalloproteins. Springer, New York, NY.

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