Developmental Activation of Calmodulin-Dependent Facilitation of Cerebellar P-Type Ca2+ Current

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Developmental activation of calmodulin-dependent facilitation of cerebellar P-type Ca2+ current.

P-type (CaV2.1) Ca2+ channels are a central conduit of neuronal Ca2+ entry, so their Ca2+ feedback regulation promises widespread neurobiological impact. Heterologous expression of recombinant CaV2.1 channels demonstrates that the Ca2+ sensor calmodulin can trigger Ca2+-dependent facilitation (CDF) of channel opening. This facilitation occurs when local Ca2+ influx through individual channels s...

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Alternative splicing as a molecular switch for Ca2+/calmodulin-dependent facilitation of P/Q-type Ca2+ channels.

Alternative splicing of the P/Q-type channel (Ca(V)2.1) promises customization of the computational repertoire of neurons. Here we report that concerted splicing of its main alpha1A subunit, at both an EF-hand-like domain and the channel C terminus, controls the form of Ca2+-dependent facilitation (CDF), an activity-dependent enhancement of channel opening that is triggered by calmodulin. In re...

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alpha1-adrenoceptor stimulation potentiates L-type Ca2+ current through Ca2+/calmodulin-dependent PK II (CaMKII) activation in rat ventricular myocytes.

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Nuclear and axonal localization of Ca2+/calmodulin-dependent protein kinase type Gr in rat cerebellar cortex.

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Ca/Calmodulin-Dependent Facilitation and Inactivation of P/Q-Type Ca Channels

Trains of action potentials cause Ca-dependent facilitation and inactivation of presynaptic P/Q-type Ca channels that can alter synaptic efficacy. A potential mechanism for these effects involves calmodulin, which associates in a Ca-dependent manner with the pore-forming a1A subunit. Here, we report that Ca and calmodulin dramatically enhance inactivation and facilitation of P/Q-type Ca channel...

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ژورنال

عنوان ژورنال: Journal of Neuroscience

سال: 2005

ISSN: 0270-6474,1529-2401

DOI: 10.1523/jneurosci.2253-05.2005