The second messenger 3′,5′-cyclic nucleoside adenosine monophosphate (cAMP) plays a key role in signal transduction across prokaryotes and eukaryotes. Cyclic AMP signaling is compartmentalized into microdomains to fulfil specific functions. To define the function of cAMP within these microdomains, signaling needs to be analyzed with spatio-temporal precision. To this end, optogenetic approaches and genetically encoded fluorescent biosensors are particularly well suited. Synthesis and hydrolysis of cAMP can be directly manipulated by photoactivated adenylyl cyclases (PACs) and light-regulated phosphodiesterases (PDEs), respectively. In addition, many biosensors have been designed to spatially and temporarily resolve cAMP dynamics in the cell. This review provides an overview about optogenetic tools and biosensors to shed light on the subcellular organization of cAMP signaling.
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Cover Image
Cover Image
The second messenger 3′,5′-cyclic nucleoside adenosine monophosphate (cAMP) plays a key role in signal transduction across prokaryotes and eukaryotes. In this issue Klausen and colleagues (1733–1748) provide an overview about the optogenetic tools and biosensors used to explore the subcellular organization of cAMP signalling. The cover image depicts time projection (colour represents time) of a head-tethered transgenic mouse sperm expressing the photo-activated adenylate cyclase bPAC. Image courtesy of Dagmar Wachten.
Elucidating cyclic AMP signaling in subcellular domains with optogenetic tools and fluorescent biosensors
Christina Klausen, Fabian Kaiser, Birthe Stüven, Jan N. Hansen, Dagmar Wachten; Elucidating cyclic AMP signaling in subcellular domains with optogenetic tools and fluorescent biosensors. Biochem Soc Trans 20 December 2019; 47 (6): 1733–1747. doi: https://doi.org/10.1042/BST20190246
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