5-HT1 receptor
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The 5-HT1 receptors are a subfamily of the 5-HT serotonin receptors that bind to the endogenous neurotransmitter serotonin (also known as 5-hydroxytryptamine, or 5-HT).[1] The 5-HT1 subfamily consists of five G protein-coupled receptors (GPCRs) that share 40% to 63% overall sequence homology, including 5-HT1A, 5-HT1B, 5-HT1D, 5-HT1E, and 5-HT1F.[2] Receptors of the 5-HT1 type, specifically, the 5-HT1A and 5-HT1D receptor subtypes, are present on the cell bodies. Receptors of the 5-HT1 type, specifically, the 5-HT1B and 5-HT1D receptor subtypes, are also present on the nerve terminals. These receptors are broadly distributed throughout the brain and are recognized to play a significant part in regulating synaptic levels of 5-HT.[3]
The receptor subfamily is coupled to Gi/Go and mediate inhibitory neurotransmission by inhibiting the function of adenylate cyclase and modulating downstream ionic effects.[4] This R-coupling to Gi/Go proteins leads to a reduction in local concentrations of cAMP, proving that 5-HT1 are primarily inhibitory.[5] There is no 5-HT1C receptor, as it was reclassified as the 5-HT2C receptor.[6] For more information, please see the respective main articles of the individual subtypes:
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See also
References
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