AI Article Synopsis
- A series of xanomeline analogs were created to test their binding effectiveness at the M(1) muscarinic acetylcholine receptor, focusing on modifications to the O-hexyl chain of xanomeline.
- The study found several new compounds that bind more strongly and persistently to the M(1) receptor than xanomeline itself, suggesting that these interactions may involve both hydrophobic and ionic components.
- A model is proposed to explain how these binding interactions work, shedding light on the structural reasons behind the wash-resistant binding and the long-lasting effects of xanomeline-based drugs.
Article Abstract
A series of xanomeline analogs were synthesized and evaluated for binding at the M(1) muscarinic acetylcholine receptor (M(1) receptor). Specifically, compounds that substitute the O-hexyl chain of xanomeline with polar, ionizable, or conformationally restricted moieties were assessed for their ability to bind to the M(1) receptor in a wash-resistant manner (persistent binding). From our screen, several novel ligands that persistently bind to the M(1) receptor with greater affinity than xanomeline were discovered. Results indicate that persistent binding may arise not only from hydrophobic interactions but also from ionic interactions with a secondary M(1) receptor binding site. Herein, a qualitative model that accounts for both binding scenarios is proposed and applied to understand the structural basis to wash-resistant binding and long-acting effects of xanomeline-based compounds.
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| http://dx.doi.org/10.1016/j.bmc.2007.10.058 | DOI Listing |
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