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Cholesterol Dependent Activity of the Adenosine A Receptor Is Modulated via the Cholesterol Consensus Motif. | LitMetric

AI Article Synopsis

Article Abstract

Background: Membrane cholesterol dysregulation has been shown to alter the activity of the adenosine A receptor (AR), a G protein-coupled receptor, thereby implicating cholesterol levels in diseases such as Alzheimer's and Parkinson's. A limited number of AR crystal structures show the receptor interacting with cholesterol, as such molecular simulations are often used to predict cholesterol interaction sites.

Methods: Here, we use experimental methods to determine whether a specific interaction between amino acid side chains in the cholesterol consensus motif (CCM) of full length, wild-type human AR, and cholesterol modulates activity of the receptor by testing the effects of mutational changes on functional consequences, including ligand binding, G protein coupling, and downstream activation of cyclic AMP.

Results And Conclusions: Our data, taken with previously published studies, support a model of receptor state-dependent binding between cholesterol and the CCM, whereby cholesterol facilitates both G protein coupling and downstream signaling of AR.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9182133PMC
http://dx.doi.org/10.3390/molecules27113529DOI Listing

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