Referenced in: none

Automatically associated channels: Slo1

Title: The role of IP3 receptor channel clustering in Ca2+ wave propagation during oocyte maturation.

Authors: Aman Ullah, Peter Jung, Ghanim Ullah, Khaled Machaca

Journal, date & volume: Prog Mol Biol Transl Sci, 2014 , 123, 83-101

PubMed link: http://www.ncbi.nlm.nih.gov/pubmed/24560141

Abstract
During oocyte maturation, the calcium-signaling machinery undergoes a dramatic remodeling resulting in distinctly different calcium-release patterns on all organizational scales from puffs to waves. The dynamics of the Ca(2+) release wave in mature as compared to immature oocytes are defined by a slower propagation speed and longer duration of the high Ca(2+) plateau. In this chapter, we use computational modeling to identify the changes in the signaling machinery, which contribute most significantly to the alterations observed in Ca(2+) wave propagation during Xenopus oocyte maturation. In addition to loss of store-operated calcium entry and internalization of plasma membrane pumps, we propose that spatial reorganization of the IP3 receptors in the plane of the ER membrane is a key factor for the observed signaling changes in Ca(2+) wave propagation.