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Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Curr+Protoc+Pharmacol 2014 ; 67 (ä): 2.10.1-9 Nephropedia Template TP
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Overview of different mechanisms of arrestin-mediated signaling #MMPMID25446289
Gurevich VV; Gurevich EV
Curr Protoc Pharmacol 2014[]; 67 (ä): 2.10.1-9 PMID25446289show ga
Arrestins were discovered based on their ability to selectively bind active phosphorylated GPCRs and suppress (arrest) receptor coupling to G proteins. Subsequently non-visual arrestins were shown to be signaling proteins in their own right, activating a variety of cellular pathways. Arrestins are highly flexible proteins that can assume several distinct conformations. In receptor-bound conformation, arrestins have higher affinity for a subset of partners. This explains how receptor activation regulates certain branches of arrestin-dependent signaling via arrestin recruitment to GPCRs. However, free arrestins are also active molecular entities that act in other pathways and localize signaling proteins to particular subcellular compartments, such as cytoskeleton. These functions are regulated by the enhancement or reduction of arrestin affinity for target proteins by other binding partners and by proteolytic cleavage. Recent findings suggest that the two visual arrestins expressed in photoreceptor cells do not regulate signaling solely via binding to photopigments, but also interact with a variety of non-receptor partners, critically affecting the health and survival of photoreceptor cells. This overview describes GPCR-dependent and ?independent modes of arrestin-mediated regulation of cellular signaling pathways.
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Curr+Protoc+Pharmacol 2014 ; 67 (ä): 2.10.1-9
