Enables G protein-coupled serotonin receptor activity and serotonin binding activity. Acts upstream of or within response to toxic substance. Predicted to be active in several cellular components, including dendrite; glutamatergic synapse; and neuronal dense core vesicle. Is expressed in several str
uctures, including alimentary system; blastocyst; central nervous system; eye; and genitourinary system. Orthologous to human HTR1D (5-hydroxytryptamine receptor 1D). [provided by Alliance of Genome Resources, Apr 2025]