Journal
NEURON
Volume 47, Issue 2, Pages 179-182Publisher
CELL PRESS
DOI: 10.1016/j.neuron.2005.07.001
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Neuronal Ca2+ channels are key transducers coupling excitability to cellular function. As such, they are tightly regulated by multiple G protein-signaling pathways that finely tune their activity. In addition to fast, direct G beta gamma modulation of Ca2+ channels, a slower G alpha(q/11)-mediated mechanism has remained enigmatic despite intensive study. Recent work suggests that membrane phosphoinositides are crucial determinants of Ca2+ channel activity. Here, we discuss their role in Ca2+ channel modulation and the leading theories that seek to elucidate the underlying molecular details of the so-called mysterious G(q/11)-mediated signal.
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