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Trends in Cell & Molecular Biology   Volumes    Volume 7 
Diverse functions of neuronal calcium sensor-1 (NCS-1) in excitable cells
Tomoe Y. Nakamura, Shigeo Wakabayashi
Pages: 99 - 110
Number of pages: 12
Trends in Cell & Molecular Biology
Volume 7 

Copyright © 2012 Research Trends. All rights reserved

Calcium (Ca2+) is a versatile and important intracellular messenger, regulating a variety of cellular processes, including neurotransmission, muscle contraction, and signal transduction. A large family of EF-hand Ca2+-binding proteins that includes the well-known calmodulin mediates the various Ca2+ functions. Neuronal calcium sensor-1 (NCS-1/frequenin) is another Ca2+-binding protein that is mainly expressed in excitable cells. NCS-1 has been reported to interact with phosphatidylinositol 4-kinaseIII-β and several ion channels, thereby playing crucial roles in regulating neuronal functions, including synaptic transmission, learning and memory, and cell survival. Although NCS-1 is also highly expressed in young hearts, little was known about its cardiac functions until recently. By characterizing Ncs1-knockout mice, NCS-1 has recently been identified as a novel regulator of immature heart contraction and cardiac hypertrophy. Here, we will describe what is currently known about biochemical characteristics, multiple targets, and functional significance of NCS-1 in excitable cells, especially those found in brain and heart cells.
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