Departure gate of acidic Ca2+ confirmed

More potent, but less known than IP3 that liberates Ca2+ from the ER, NAADP releases Ca2+ from acidic stores. The notion that TPC channels mediate this Ca2+ release was questioned recently by studies suggesting that TPCs are rather PI(3,5)P2-activated Na+ channels. Ruas et al (2015) now partially reconcile these views by showing that TPCs significantly conduct both cations and confirm their activation by both NAADP and PI(3,5)P2. They attribute the failure of others to observe TPC-dependent NAADP-induced Ca2+ release in vivo to inadequate mouse models that retain partial TPC function.

Source: EMBO Journal - June 30, 2015 Category: Molecular Biology Authors: Jentsch, T. J., Hoegg-Beiler, M. B., Vogt, J. Tags: Membrane & Intracellular Transport Have you seen? Source Type: research