This papers shows that inositol-1,4,5-trisphosphate (InsP3) receptors aggregate in responses to InsP3, resulting in a lower probability of channel opening, and that increases in intracellular Ca2+ can effectively relieve this inhibition and enhance the coupling between receptors in a cluster. This mechanism probably serves to enhance the sensitivity to changes in intracellular Ca2+.
- Taufiq-Ur-Rahman
- Alexander Skupin
- Colin W. Taylor