Dynamic regulation of intracellular calcium signals through calcium release channels

1999 ◽  
pp. 185-190
Author(s):  
Masamitsu Iino
Keyword(s):  
Intracellular Calcium ◽  
Calcium Release ◽  
Calcium Signals ◽  
Calcium Release Channels ◽  
Dynamic Regulation

scholarly journals N-terminus oligomerization is conserved in intracellular calcium release channels

2014 ◽  
Vol 459 (2) ◽  
pp. 265-273 ◽  
Author(s):  
Spyros Zissimopoulos ◽  
Jason Marsh ◽  
Laurence Stannard ◽  
Monika Seidel ◽  
F. Anthony Lai
Keyword(s):  
Structure Function ◽  
Intracellular Calcium ◽  
Calcium Release ◽  
Function Parameter ◽  
Calcium Release Channels ◽  
Cellular Processes ◽  
N Terminus ◽  
Intracellular Calcium Release ◽  
Ca2 Channels

Intracellular Ca2+ channels are of paramount importance for numerous cellular processes. In the present paper we report on a novel N-terminus intersubunit interaction, an essential structure–function parameter, which is conserved in both families of intracellular Ca2+ channels.

Modifications of Intracellular Calcium Release Channels and Calcium Mobilization Following 70% Hepatectomy

1998 ◽  
Vol 349 (1) ◽  
pp. 105-112 ◽  
Author(s):  
Mauricio Dı́az-Muñoz ◽  
Rafael Cañedo-Merino ◽  
José Gutiérrez-Salinas ◽  
Rolando Hernández-Muñoz
Keyword(s):  
Intracellular Calcium ◽  
Calcium Release ◽  
Calcium Mobilization ◽  
Calcium Release Channels ◽  
Intracellular Calcium Release

scholarly journals Intracellular calcium release channels: an update

2017 ◽  
Vol 595 (10) ◽  
pp. 3041-3051 ◽  
Author(s):  
Gaetano Santulli ◽  
Ryutaro Nakashima ◽  
Qi Yuan ◽  
Andrew R. Marks
Keyword(s):  
Intracellular Calcium ◽  
Calcium Release ◽  
Calcium Release Channels ◽  
Intracellular Calcium Release

Ryanodine receptor Ca2+ release channels: does diversity in form equal diversity in function?

1996 ◽  
Vol 76 (4) ◽  
pp. 1027-1071 ◽  
Author(s):  
J. L. Sutko ◽  
J. A. Airey
Keyword(s):  
Intracellular Calcium ◽  
Ryanodine Receptor ◽  
Skeletal Muscles ◽  
Calcium Release ◽  
Cell Types ◽  
Calcium Transients ◽  
Eukaryotic Cells ◽  
Calcium Release Channels ◽  
Primary Focus ◽  
Fast Twitch

Complexities in calcium signaling in eukaryotic cells require diversity in the proteins involved in generating these signals. In this review, we consider the ryanodine receptor (RyR) family of intracellular calcium release channels. This includes species, tissue, and cellular distributions of the RyRs and mechanisms of activation, deactivation, and inactivation of RyR calcium release events. In addition, as first observed in nonmammalian vertebrate skeletal muscles, it is now clear that more than one RyR isoform is frequently coexpressed within many cell types. How multiple ryanodine receptor release channels are used to generate intracellular calcium transients is unknown. Therefore, a primary focus of this review is why more than one RyR is required for this purpose, particularly in a tissue, such as vertebrate fast-twitch skeletal muscles, where a relatively simple and straightforward change in calcium would appear to be required to elicit contraction. Finally, the roles of the RyR isoforms and the calcium release events they mediate in the development of embryonic skeletal muscle are considered.

scholarly journals Calcium signaling via two-pore channels: local or global, that is the question

2010 ◽  
Vol 298 (3) ◽  
pp. C430-C441 ◽  
Author(s):  
Michael X. Zhu ◽  
Jianjie Ma ◽  
John Parrington ◽  
Peter J. Calcraft ◽  
Antony Galione ◽  
...  
Keyword(s):  
Calcium Signaling ◽  
Calcium Release ◽  
Ryanodine Receptors ◽  
Calcium Stores ◽  
Calcium Signals ◽  
Calcium Release Channels ◽  
Intracellular Calcium Signaling ◽  
Global Signal ◽  
Rna Knockdown ◽  
Calcium Induced Calcium Release

Recently, we identified, for the first time, two-pore channels (TPCs, TPCN for gene name) as a novel family of nicotinic acid adenine dinucleotide phosphate (NAADP)-gated, endolysosome-targeted calcium release channels. Significantly, three subtypes of TPCs have been characterized, TPC1-3, with each being targeted to discrete acidic calcium stores, namely lysosomes (TPC2) and endosomes (TPC1 and TPC3). That TPCs act as NAADP-gated calcium release channels is clear, given that NAADP binds to high- and low-affinity sites associated with TPC2 and thereby induces calcium release and homologous desensitization, as observed in the case of endogenous NAADP receptors. Moreover, NAADP-evoked calcium signals via TPC2 are ablated by short hairpin RNA knockdown of TPC2 and by depletion of acidic calcium stores with bafilomycin. Importantly, however, NAADP-evoked calcium signals were biphasic in nature, with an initial phase of calcium release from lysosomes via TPC2, being subsequently amplified by calcium-induced calcium release (CICR) from the endoplasmic reticulum (ER). In marked contrast, calcium release via endosome-targeted TPC1 induced only spatially restricted calcium signals that were not amplified by CICR from the ER. These findings provide new insights into the mechanisms that cells may utilize to “filter” calcium signals via junctional complexes to determine whether a given signal remains local or is converted into a propagating global signal. Essentially, endosomes and lysosomes represent vesicular calcium stores, quite unlike the ER network, and TPCs do not themselves support CICR or, therefore, propagating regenerative calcium waves. Thus “quantal” vesicular calcium release via TPCs must subsequently recruit inositol 1,4,5-trisphoshpate receptors and/or ryanodine receptors on the ER by CICR to evoke a propagating calcium wave. This may call for a revision of current views on the mechanisms of intracellular calcium signaling. The purpose of this review is, therefore, to provide an appropriate framework for future studies in this area.

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