Abstract
A number of integral membrane G protein-coupled receptors (GPCRs) share common structural features (including palmytoilated aminoacid residues and consensus sequences specific for interaction with cholesterol) that allow them to interact with lipid rafts, membrane cholesterol-rich microdomains able to regulate GPCR signalling and functions. Among GPCRs, type-1 and type-2 cannabinoid receptors, the molecular targets of endocannabinoids (eCBs), control many physiological and pathological processes through the activation of several signal transduction pathways. Recently, the orphan GPR55 receptor has been proved to be activated by many eCBs, thus leading to the hypothesis that it might be the “type-3” cannabinoid receptor. While the biological activity of eCBs and the influence of membrane lipids on their functions are rather well established, information regarding GPR55 is still scarce and often controversial. Based on this background, here we shall review current data about GPR55 pharmacology and signalling, highlighting its involvement in several pathophysiological conditions. We shall also outline the structural features that allow GPR55 to interact with cholesterol and to associate with lipid rafts; how the latter lipid microdomains impact the biological activity of GPR55 is also addressed, as well as their potential for the discovery of new therapeutics useful for the treatment of those human diseases that might be associated with alterations of GPR55 activity.
Keywords: Cannabinoid receptors, cholesterol, endocannabinoids, GPR55, lipid rafts, plasma membranes, integral membrane, G protein-coupled receptors (GPCRs), aminoacid residues, consensus sequences
Current Medicinal Chemistry
Title:GPR55 and its Interaction with Membrane Lipids: Comparison with Other Endocannabinoid-Binding Receptors
Volume: 20 Issue: 1
Author(s): V. Gasperi, E. Dainese, S. Oddi, A. Sabatucci and M. Maccarrone
Affiliation:
Keywords: Cannabinoid receptors, cholesterol, endocannabinoids, GPR55, lipid rafts, plasma membranes, integral membrane, G protein-coupled receptors (GPCRs), aminoacid residues, consensus sequences
Abstract: A number of integral membrane G protein-coupled receptors (GPCRs) share common structural features (including palmytoilated aminoacid residues and consensus sequences specific for interaction with cholesterol) that allow them to interact with lipid rafts, membrane cholesterol-rich microdomains able to regulate GPCR signalling and functions. Among GPCRs, type-1 and type-2 cannabinoid receptors, the molecular targets of endocannabinoids (eCBs), control many physiological and pathological processes through the activation of several signal transduction pathways. Recently, the orphan GPR55 receptor has been proved to be activated by many eCBs, thus leading to the hypothesis that it might be the “type-3” cannabinoid receptor. While the biological activity of eCBs and the influence of membrane lipids on their functions are rather well established, information regarding GPR55 is still scarce and often controversial. Based on this background, here we shall review current data about GPR55 pharmacology and signalling, highlighting its involvement in several pathophysiological conditions. We shall also outline the structural features that allow GPR55 to interact with cholesterol and to associate with lipid rafts; how the latter lipid microdomains impact the biological activity of GPR55 is also addressed, as well as their potential for the discovery of new therapeutics useful for the treatment of those human diseases that might be associated with alterations of GPR55 activity.
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Gasperi V., Dainese E., Oddi S., Sabatucci A. and Maccarrone M., GPR55 and its Interaction with Membrane Lipids: Comparison with Other Endocannabinoid-Binding Receptors, Current Medicinal Chemistry 2013; 20 (1) . https://dx.doi.org/10.2174/0929867311302010008
DOI https://dx.doi.org/10.2174/0929867311302010008 |
Print ISSN 0929-8673 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-533X |
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