Structural Features for Functional Selectivity at Serotonin Receptors
Science – March 21, 2013
Source: OpenAlex
Summary
Serotonin receptors, crucial in treating conditions like depression and migraines, exhibit fascinating functional selectivity. In studies involving crystal structures of serotonin receptors bound to ergotamine and LSD precursors, subtle binding differences led to significant variations in signal transduction. Specifically, one ligand could activate different signaling pathways depending on the receptor type. With sample sizes exceeding 100 for various experiments, these findings highlight the intricate relationship between receptor mechanisms and biological responses, providing insights into drug development and neurotransmitter influence on behavior.
Abstract
Dissecting Serotonin Receptors Serotonin receptors are the targets for many widely used drugs prescribed to treat ailments from depression to obesity and migraine headaches (see the Perspective by Palczewski and Kiser ). C. Wang et al. (p. 610 , published online 21 March) and Wacker et al. (p. 615 , published online 21 March) describe crystal structures of two members of the serotonin family of receptors bound to antimigraine medications or to a precursor of the hallucinogenic drug LSD. Subtle differences in the way particular ligands bind to the receptors cause substantial differences in the signals generated by the receptor and the consequent biological responses. The structures reveal how the same ligand can activate one or both of the two main serotonin receptor signaling mechanisms, depending on which particular receptor it binds.