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The C terminus of the L-type voltage-gated calcium channel Ca(V)1.2 encodes a transcription factor.

Abstract：

:Voltage-gated calcium channels play a central role in regulating the electrical and biochemical properties of neurons and muscle cells. One of the ways in which calcium channels regulate long-lasting neuronal properties is by activating signaling pathways that control gene expression, but the mechanisms that link calcium channels to the nucleus are not well understood. We report that a C-terminal fragment of Ca(V)1.2, an L-type voltage-gated calcium channel (LTC), translocates to the nucleus and regulates transcription. We show that this calcium channel associated transcription regulator (CCAT) binds to a nuclear protein, associates with an endogenous promoter, and regulates the expression of a wide variety of endogenous genes important for neuronal signaling and excitability. The nuclear localization of CCAT is regulated both developmentally and by changes in intracellular calcium. These findings provide evidence that voltage-gated calcium channels can directly activate transcription and suggest a mechanism linking voltage-gated channels to the function and differentiation of excitable cells.

journal_name

Cell

journal_title

Cell

authors

Gomez-Ospina N,Tsuruta F,Barreto-Chang O,Hu L,Dolmetsch R

doi

10.1016/j.cell.2006.10.017

subject

Has Abstract

pub_date

2006-11-03 00:00:00

pages

591-606

issue

3

eissn

0092-8674

issn

1097-4172

pii

S0092-8674(06)01343-2

journal_volume

127

pub_type

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