A-Kinase Anchoring Protein 9 and IKs Channel Regulation
نویسندگان
چکیده
منابع مشابه
Phosphorylation of the A-kinase-anchoring protein Yotiao contributes to protein kinase A regulation of a heart potassium channel.
Regulation of the heart by the sympathetic nervous system, fundamental to the physiological response to stress and exercise, requires coordinated phosphorylation of multiple downstream molecular targets, including the I(Ks) (slowly activating potassium current) channel. Sympathetic nervous system stimulation increases intracellular cAMP for which targeted regulation is directed in large part by...
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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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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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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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Classical physiological experiments identified cAMP as a diffusible intracellular secondary messenger capable of activating cAMP-dependent protein kinase (PKA). These studies defined hormoneand location-specific patterns of PKA activation, suggesting that PKA signaling was compartmentalized. For example, in perfused rat cardiomyocytes, adrenergic stimulation selectively activates a pool of PKA ...
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ژورنال
عنوان ژورنال: Journal of Cardiovascular Pharmacology
سال: 2011
ISSN: 0160-2446
DOI: 10.1097/fjc.0b013e318232c80c