Inorganic polyphosphate and ion transport across biological membranes.

Yaw Akosah, Jingyi Yang, Evgeny Pavlov

Biochemical Society transactions 2024 Apr 24

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Inorganic polyphosphate (polyP) is widely recognized for playing important roles and processes involved in energy and phosphate storage, regulation of gene expression, and calcium signaling. The less well-known role of polyP is as a direct mediator of ion transport across biological membranes. Here, we will briefly summarize current knowledge of the molecular mechanisms of how polyP can be involved in membrane ion transport. We discuss three types of mechanisms that might involve polyP: (1) formation of non-protein channel complex that includes calcium, polyP, and polyhydroxybutyrate (PHB); (2) modulation of the channel activity of PHBlated protein channels; and (3) direct effects of polyP on the function of the voltage-gated ion channels in the process that do not involve PHB. © 2024 The Author(s). Published by Portland Press Limited on behalf of the Biochemical Society.

Citation

Yaw Akosah, Jingyi Yang, Evgeny Pavlov. Inorganic polyphosphate and ion transport across biological membranes. Biochemical Society transactions. 2024 Apr 24;52(2):671-679