Predicted to enable G protein-coupled serotonin receptor activity; neurotransmitter receptor activity; and serotonin binding activity. Predicted to be involved in G protein-coupled receptor signaling pathway; chemical synaptic transmission; and intestine smooth muscle contraction. Predicted to act upstream of or within response to toxic substance. Predicted to be located in synapse. Predicted to be active in dendrite. Predicted to be integral component of plasma membrane. Orthologous to human HTR1D (5-hydroxytryptamine receptor 1D). [provided by Alliance of Genome Resources, Apr 2022]