A-Kinase Anchoring Protein Targeting of Protein Kinase A and Regulation of HERG Channels
نویسندگان
چکیده
منابع مشابه
Regulation of ion channels by cAMP-dependent protein kinase and A-kinase anchoring proteins.
Subcellular targeting of the cAMP-dependent protein kinase is achieved, in part, through association with A-kinase anchoring proteins (AKAPs). Recent evidence suggests that specific AKAPs direct the kinase to submembrane sites to facilitate phosphorylation and modulation of a variety of ion channels. A new membrane-anchored AKAP targets cAMP-dependent protein kinase to calcium channels and enha...
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Specificity is perhaps the most enigmatic property of hormonemediated signaling pathways, especially when one considers that more than 30 hormones employ the ubiquitous second messengers, Ca, phospholipid, or cAMP, to relay messages from the cell membrane to intracellular effectors. In most cases the net signaling effect is to activate protein kinases or phosphoprotein phosphatases, which, in t...
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Compartmentalization of kinases and phosphatases is a key determinant in the specificity of second messenger mediated signaling events. Localization of the cAMP-dependent protein kinase (PKA) and other signaling enzymes is mediated by interaction with A-kinase anchoring proteins (AKAPs). In the past year there have been many advances in our understanding of AKAPs, particularly in the field of t...
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Voltage-dependent L-type Ca(2+) channels are multisubunit transmembrane proteins, which allow the influx of Ca(2+) (I:(Ca)) essential for normal excitability and excitation-contraction coupling in cardiac myocytes. A variety of different receptors and signaling pathways provide dynamic regulation of I:(Ca) in the intact heart. The present review focuses on recent evidence describing the molecul...
متن کاملDifferential regulation of CaV1.2 channels by cAMP-dependent protein kinase bound to A-kinase anchoring proteins 15 and 79/150
The CaV1.1 and CaV1.2 voltage-gated calcium channels initiate excitation-contraction coupling in skeletal and cardiac myocytes, excitation-transcription coupling in neurons, and many other cellular processes. Up-regulation of their activity by the β-adrenergic-PKA signaling pathway increases these physiological responses. PKA up-regulation of CaV1.2 activity can be reconstituted in a transfecte...
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ژورنال
عنوان ژورنال: Journal of Membrane Biology
سال: 2008
ISSN: 0022-2631,1432-1424
DOI: 10.1007/s00232-008-9118-4