Organization and Ca2+ Regulation of Adenylyl Cyclases in cAMP Microdomains
TLDR
The regulation of many of the ACs by the ubiquitous second messenger Ca(2+) provides an overarching mechanism for integrating the activities of these two major signaling systems, and cAMP will exhibit distinct kinetics in discrete cellular domains.Abstract:
The adenylyl cyclases are variously regulated by G protein subunits, a number of serine/threonine and tyrosine protein kinases, and Ca2+. In some physiological situations, this regulation can be re...read more
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Manuela Zaccolo,Tullio Pozzan +1 more
TL;DR: In neonatal rat cardiac myocytes, β-adrenergic stimulation generates multiple microdomains with increased concentration of cAMP in correspondence with the region of the transverse tubule/junctional sarcoplasmic reticulum membrane, and such gradients specifically activate a subset of protein kinase A molecules anchored in proximity to the T tubule.
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