NDLI: Neuronal Calcium Sensor-1 Regulation of Calcium Channels, Secretion, and Neuronal Outgrowth

Content Provider	Springer Nature Link
Author	Weiss, Jamie L. Hui, Hui Burgoyne, Robert D.
Copyright Year	2010
Abstract	Calcium (Ca2+) is an important intracellular messenger underlying cell physiology. Ca2+ channels are the main entry route for Ca2+ into excitable cells, and regulate processes such as neurotransmitter release and neuronal outgrowth. Neuronal Calcium Sensor-1 (NCS-1) is a member of the Calmodulin superfamily of EF-hand Ca2+ sensing proteins residing in the subfamily of NCS proteins. NCS-1 was originally discovered in Drosophila as an overexpression mutant (Frequenin), having an increased frequency of Ca2+-evoked neurotransmission. NCS-1 is N-terminally myristoylated, can bind intracellular membranes, and has a Ca2+ affinity of 0.3 μM. Over 10 years ago it was discovered that NCS-1 overexpression enhances Ca2+-evoked secretion in bovine adrenal chromaffin cells. The mechanism was unclear, but there was no apparent direct effect on the exocytotic machinery. It was revealed, again in chromaffin cells, that NCS-1 regulates voltage-gated Ca2+ channels (Cavs) in G-Protein Coupled Receptor (GPCR) signaling pathways. This work in chromaffin cells highlighted NCS-1 as an important modulator of neurotransmission. NCS-1 has since been shown to regulate and/or directly interact with many proteins including Cavs (P/Q, N, and L), TRPC1/5 channels, GPCRs, IP3R, and PI4 kinase type IIIβ. NCS-1 also affects neuronal outgrowth having roles in learning and memory affecting both short- and long-term synaptic plasticity. It is not known if NCS-1 affects neurotransmission and synaptic plasticity via its effect on PIP2 levels, and/or via a direct interaction with Ca2+ channels or their signaling complexes. This review gives a historical account of NCS-1 function, examining contributions from chromaffin cells, PC12 cells and other models, to describe how NCS-1’s regulation of Ca2+ channels allows it to exert its physiological effects.
Starting Page	1283
Ending Page	1292
Page Count	10
File Format	PDF
ISSN	02724340
Journal	Cellular and Molecular Neurobiology
Volume Number	30
Issue Number	8
e-ISSN	15736830
Language	English
Publisher	Springer US
Publisher Date	2010-11-23
Publisher Place	Boston
Access Restriction	Subscribed
Subject Keyword	Neuronal Calcium Sensor-1 NCS-1 Frequenin Ca2+ channel Chromaffin cells PC12 cells GPCR Secretion TRPC Cavs Exocytosis PIP2 Ca2+ signaling Neurobiology Cell Biology Neurosciences
Content Type	Text
Resource Type	Article
Subject	Cell Biology Medicine Cellular and Molecular Neuroscience

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