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Updated: Jun 28, 2025
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Assaying for Inorganic Polyphosphate in Bacteria
Published on: January 21, 2019
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Inorganic polyphosphate and ion transport across biological membranes
Yaw Akosah1, Jingyi Yang1, Evgeny Pavlov1
1Department of Molecular Pathobiology, New York University, New York, NY, U.S.A.
Biochemical Society Transactions
|April 17, 2024
Summary
Inorganic polyphosphate (polyP) acts as a direct mediator of ion transport across membranes. It forms complexes, modulates protein channels, and directly affects voltage-gated ion channels.
Area of Science:
- Biochemistry
- Molecular Biology
- Membrane Biophysics
Background:
- Inorganic polyphosphate (polyP) is known for energy storage, gene regulation, and calcium signaling.
- A less recognized function of polyP is its direct role in mediating ion transport across biological membranes.
Purpose of the Study:
- To summarize the molecular mechanisms by which polyP participates in membrane ion transport.
- To highlight three distinct mechanisms involving polyP in ion transport.
Main Methods:
- Literature review and synthesis of current knowledge on polyP and ion transport.
- Analysis of proposed molecular mechanisms.
Main Results:
- PolyP is involved in ion transport through three primary mechanisms.
- Mechanism 1: Formation of a non-protein channel complex (calcium, polyP, polyhydroxybutyrate [PHB]).
- Mechanism 2: Modulation of polyhydroxybutyrate (PHB)-related protein channel activity.
- Mechanism 3: Direct effects of polyP on voltage-gated ion channels, independent of PHB.
Conclusions:
- PolyP plays a multifaceted role in regulating ion transport across biological membranes.
- Understanding these mechanisms enhances our knowledge of polyP's diverse cellular functions.
- Further research into these pathways could reveal new therapeutic targets.
Keywords:
calcium channelsion channelsmitochondriamitochondrial permeability transition porespolyphosphateMore Related Videos
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