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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

A saturable receptor for 32P-inositol-1,4,5-triphosphate in hepatocytes and neutrophils.

Several receptors for neurotransmitters, hormones and growth factors cause accelerated phosphodiesteratic breakdown of polyphosphoinositides when activated. One of the soluble products of this reaction, inositol-1,4,5-trisphosphate (Ins(1,4,5)P3) is thought to act as a second messenger signalling the release of Ca2+ from intracellular stores. In support of this hypothesis, several studies have shown that Ins(1,4,5)P3 releases sequestered Ca2+ from permeable cells and microsomes. On the basis of certain structural requirements for Ca2+-releasing activity by inositol phosphates, it has been postulated that Ins(1,4,5)P3 acts by binding to a specific intracellular receptor, probably on a component of the endoplasmic reticulum. Here we report that 32P-Ins(1,4,5)P3 binds to a specific saturable site in permeabilized guinea pig hepatocytes and rabbit neutrophils, and that the properties of this binding site suggest that it is the physiological receptor for Ins(1,4,5)P3.[1]

References

  1. A saturable receptor for 32P-inositol-1,4,5-triphosphate in hepatocytes and neutrophils. Spät, A., Bradford, P.G., McKinney, J.S., Rubin, R.P., Putney, J.W. Nature (1986) [Pubmed]
 
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