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Updated: Dec 18, 2025
09:01
Extraction and Quantification of Soluble, Radiolabeled Inositol Polyphosphates from Different Plant Species using SAX-HPLC
Published on: June 26, 2020
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Inositol Pyrophosphate Pathways and Mechanisms: What Can We Learn from Plants?
Caitlin Cridland1, Glenda Gillaspy1
1Department of Biochemistry, Virginia Tech, Blacksburg, VA 24061, USA.
Molecules (Basel, Switzerland)
|June 21, 2020
Summary
Inositol pyrophosphates (PP-InsPs) are crucial for phosphate and energy sensing in plants and humans. This review compares PP-InsP biosynthesis and function, highlighting differences and similarities in these key signaling molecules.
Area of Science:
- Biochemistry
- Molecular Biology
- Cell Signaling
Background:
- Homeostasis is vital for organismal survival, with eukaryotes employing complex signaling pathways like the inositol phosphate (InsP) pathway for adaptation.
- Inositol pyrophosphates (PP-InsPs), derived from InsP6, are implicated in phosphate and energy sensing in both plants and humans.
- Distinct PP-InsP synthesis pathways in plants and humans suggest varied roles for molecules like Ins(1,4,5)P3 and InsP6.
Purpose of the Study:
- To compare the biosynthesis and roles of PP-InsPs in animals and plants.
- To elucidate the synthesis pathways of InsP6 and PP-InsPs, including their regulation.
- To investigate the function of the SPX domain in PP-InsP binding and phosphate sensing.
Main Methods:
- Comparative analysis of PP-InsP biosynthesis pathways in plants and animals.
- Review of literature on InsP6 synthesis and PP-InsP production and regulation.
- Examination of the role of the SPX domain in PP-InsP interactions and inorganic phosphate (Pi) sensing.
Main Results:
- PP-InsP synthesis pathways exhibit similarities and distinct differences between plants and humans.
- PP-InsPs can interact with various plant signaling proteins, indicating unique signaling functions.
- The SPX domain plays a critical role in binding PP-InsPs and regulating Pi sensing.
Conclusions:
- PP-InsPs are key signaling molecules with conserved and divergent roles in plants and animals.
- Understanding PP-InsP pathways offers insights into phosphate and energy homeostasis.
- Further research into PP-InsP bioactivity can reveal novel therapeutic and agricultural applications.
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