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• W2955811344 abstract "The α7 nicotinic acetylcholine receptor (nAChR) is a potential drug target for the treatment of a number of neurologic and inflammatory disorders. Silent agonists are an emerging class of drugs that bind to the receptor but do not open the channel. Instead they shift the receptor to a desensitized state. Silent agonists may be able to target a subset of α7 nAChR-mediated signaling processes. Here we use noncanonical amino acid mutagenesis to characterize the binding to α7 by the silent agonist 1,4-diazabicyclo[3.2.2]nonan-4-yl(5-(3-(trifluoromethyl)phenyl)furan-2-yl)methanone (NS6740). We find that, like α7 agonists, NS6740 forms a cation-π interaction with Y115 (TyrA). We also showed that NS6740 makes a novel hydrogen bond to TyrA. This interaction is necessary for the silent agonist activity of NS6740; when the hydrogen bond is blocked, silent agonist NS6740 converts to a conventional partial agonist and appreciably opens the channel in the absence of a positive allosteric modulator (EC50 150 nM). SIGNIFICANCE STATEMENT: Noncanonical amino acids were used to show that a hydrogen bond to tyrosine (Y115) is required for silent agonist activity of NS6740 at the α7 nicotinic acetylcholine receptor." @default.
• W2955811344 created "2019-07-12" @default.
• W2955811344 creator A5002660163 @default.
• W2955811344 creator A5082417488 @default.
• W2955811344 date "2019-06-07" @default.
• W2955811344 modified "2023-09-27" @default.
• W2955811344 title "Binding Interactions of NS6740, a Silent Agonist of the <i>α</i>7 Nicotinic Acetylcholine Receptor" @default.
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• W2955811344 doi "https://doi.org/10.1124/mol.119.116244" @default.
• W2955811344 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31175182" @default.
• W2955811344 hasPublicationYear "2019" @default.
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