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Inositol trisphosphate receptor Ca2+ release channels.
TLDR
Over the last decade, detailed quantitative studies of InsP3R channel function and its regulation by ligands and interacting proteins have provided new insights into a remarkable richness of channel regulation and of the structural aspects that underlie signal transduction and permeation.
The endoplasmic reticulum gateway to apoptosis by Bcl-XL modulation of the InsP3R
TLDR
Evidence is provided that anti-apoptotic Bcl-2 proteins regulate the inositol 1,4,5-trisphosphate receptor (InsP3R) ER Ca2+ release channel resulting in increased cellular apoptotic resistance and enhanced mitochondrial bioenergetics and preserves survival.
Inhibition of cystic fibrosis transmembrane conductance regulator by novel interaction with the metabolic sensor AMP-activated protein kinase.
TLDR
Regulation of CFTR by AMPK may be important in inhibiting CFTR under conditions of metabolic stress, thereby linking transepithelial transport to cell metabolic state.
CALHM1 ion channel mediates purinergic neurotransmission of sweet, bitter and umami tastes
TLDR
It is shown that calcium homeostasis modulator 1 (CALHM1), a voltage-gated ion channel, is indispensable for taste-stimuli-evoked ATP release from sweet-, bitter- and umami-sensing taste bud cells.
Regulation of cystic fibrosis transmembrane conductance regulator single-channel gating by bivalent PDZ-domain-mediated interaction.
TLDR
The results support a molecular model in which bivalent NHERF PDZ domains regulate channel gating by crosslinking the C-terminal tails in a single dimeric CFTR channel, and the magnitude of this regulation is coupled to the stoichiometry of these interactions.
Inositol 1,4,5-tris-phosphate activation of inositol tris-phosphate receptor Ca2+ channel by ligand tuning of Ca2+ inhibition
TLDR
Allosteric tuning of Ca2+ inhibition by IP3 enables the individual IP3R Ca2+.
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