||HTR1E (5-Hydroxytryptamine Receptor 1E) is a Protein Coding gene. Diseases associated with HTR1E include attention deficit-hyperactivity disorder. Among its related pathways are Signaling by GPCR and cAMP signaling pathway. Gene Ontology (GO) annotations related to this gene include G-protein coupled receptor activity and serotonin binding. An important paralog of this gene is HTR1F. G-protein coupled receptor for 5-hydroxytryptamine (serotonin). Also functions as a receptor for various alkaloids and psychoactive substances. Ligand binding causes a conformation change that triggers signaling via guanine nucleotide-binding proteins (G proteins) and modulates the activity of down-stream effectors, such as adenylate cyclase. Signaling inhibits adenylate cyclase activity. Serotonin 5-ht1E receptors are primarily located in the frontal cortex, caudate putamen, claustrum, hippocampus, and amygdala. The human 5-ht1E receptor gene has been localized to chromosome 6 (6q14-q15); the receptor is closely related to the serotonin 5-HT1F receptor.