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Updated: Aug 13, 2026
10:34
Preparation of Quality Inositol Pyrophosphates
Published on: September 3, 2011
The inositol 1,4,5-trisphosphate receptors
1University of Texas, Department of Physiology, UT Southwestern Medical Center at Dallas, 5323 Harry Hines Blvd., Dallas, Texas 75390-9040, USA. iyla.bezprozvanny@utsouthwestern.edu
Cell Calcium
|August 17, 2005
Summary
Inositol (1,4,5)-trisphosphate receptors (InsP3R) are crucial intracellular calcium release channels. This review details recent advances in understanding InsP3R structure, function, and regulation, focusing on InsP3R1.
Area of Science:
- Cellular Biology
- Molecular Biology
- Biochemistry
Background:
- Inositol (1,4,5)-trisphosphate receptors (InsP3R) are key regulators of intracellular calcium (Ca2+) signaling.
- Three mammalian InsP3R isoforms (InsP3R1, InsP3R2, InsP3R3) and single isoforms in model organisms (Drosophila melanogaster, Caenorhabditis elegans) are known.
- Understanding InsP3R function is critical for deciphering cellular communication.
Purpose of the Study:
- To review recent advancements in InsP3R research over the past decade.
- To highlight structural determinants of InsP3R ligand recognition and ion permeability.
- To discuss modulators of InsP3R activity and its binding partners.
Main Methods:
- Literature review of studies on InsP3R structure and function.
- Analysis of research on InsP3R isoforms, including InsP3R1.
- Examination of data on InsP3R modulation by Ca2+, ATP, and PKA phosphorylation.
Main Results:
- Significant progress has been made in identifying structural features governing InsP3R ligand binding.
- Insights into the ion permeability properties of InsP3R channels have been gained.
- The modulatory roles of cytosolic Ca2+, ATP, and PKA phosphorylation on InsP3R activity are better understood.
- Novel InsP3R-binding partners have been identified, expanding the network of InsP3R interactions.
Conclusions:
- Recent research has significantly advanced our understanding of InsP3R structure-function relationships.
- The modulation of InsP3R activity by various factors and its interactions with binding partners are crucial for Ca2+ signaling.
- Further investigation into InsP3R isoforms and their roles in cellular processes is warranted.
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