Inorganic polyphosphate: a molecule of many functions

Area of Science:

• Biochemistry
• Molecular Biology
• Cell Biology

Background:

• Polyphosphates (polyP) are ubiquitous polymers of phosphate residues linked by phosphoanhydride bonds.
• Enzymes involved in polyP metabolism have been identified, enabling their study across diverse organisms.
• PolyP plays critical roles in microbial survival and adaptation, particularly during stationary phase growth.

Purpose of the Study:

• To investigate the diverse functions of polyphosphates (polyP) in biological systems.
• To explore the potential roles of polyP in human health, aging, and disease.
• To highlight the evolutionary significance and industrial applications of polyP.

Main Methods:

• Utilized analytic reagents derived from polyP-metabolizing enzymes.
• Confirmed the presence and quantified polyP concentrations in microbial and animal samples.
• Reviewed existing literature on polyP functions and potential applications.

Main Results:

• PolyP is universally present in microbes and animals, with measurable low concentrations.
• Identified multiple functions of polyP, including energy supply, metal chelation, and stress response regulation.
• PolyP is crucial for survival in the stationary phase, a dynamic period of life.

Conclusions:

• PolyP is a fundamental molecule with diverse roles, essential for adaptation and survival.
• Its functions in microorganisms likely extend to human development, aging, and disease.
• PolyP holds significance in prebiotic evolution as a precursor to nucleic acids and proteins, and has industrial applications.