The emerging landscape of eukaryotic polyphosphatases

Area of Science:

• Biochemistry
• Molecular Biology
• Cell Biology

Background:

• Polyphosphate (polyP) is a conserved polymer involved in crucial cellular functions like energy homeostasis and cell signaling.
• The spatiotemporal regulation of polyP remains poorly understood, hindering insights into its physiological roles and therapeutic potential.
• Polyphosphatases, enzymes that degrade polyP, are key regulators of polyP dynamics, but their functions and regulation are largely unknown.

Purpose of the Study:

• To provide an in-depth overview of polyphosphatase enzymes in budding yeast and mammalian cells.
• To identify critical knowledge gaps regarding polyP regulation and polyphosphatase activity in both model systems.
• To propose strategies for future research to elucidate the roles of polyphosphatases in cellular physiology.

Main Methods:

• Literature review and synthesis of existing research on polyphosphatases.
• Comparative analysis of polyphosphatase systems in budding yeast and mammalian cells.
• Identification of open questions and formulation of research strategies.

Main Results:

• Budding yeast serves as a model system for polyP research, while mammalian polyphosphatases are less characterized.
• Critical open questions regarding the regulation and cellular functions of polyphosphatases were identified in both yeast and mammals.
• Strategies for future research were proposed to address these knowledge gaps.

Conclusions:

• Understanding polyphosphatase enzymes is crucial for deciphering polyP spatiotemporal regulation.
• Further research in both yeast and mammalian systems is needed to elucidate the precise roles and regulation of polyphosphatases.
• Addressing these knowledge gaps will advance our understanding of polyP's impact on normal and diseased cells.