| Function | G-protein coupled receptor for 5-hydroxytryptamine (serotonin). Also functions as a receptor for various drugs and psychoactive substances, including mescaline, psilocybin, 1-(2,5-dimethoxy-4-iodophenyl)-2-aminopropane (DOI) and lysergic acid diethylamide (LSD). Ligand binding causes a conformation change that triggers signaling via guanine nucleotide-binding proteins (G proteins) and modulates the activity of downstream effectors. HTR2A is coupled to G(q)/G(11) G alpha proteins and activates phospholipase C-beta, releasing diacylglycerol (DAG) and inositol 1,4,5-trisphosphate (IP3) second messengers that modulate the activity of phosphatidylinositol 3-kinase and promote the release of Ca(2+) ions from intracellular stores, respectively. Beta-arrestin family members inhibit signaling via G proteins and mediate activation of alternative signaling pathways. Affects neural activity, perception, cognition and mood. Plays a role in the regulation of behavior, including responses to anxiogenic situations and psychoactive substances. Plays a role in intestinal smooth muscle contraction, and may play a role in arterial vasoconstriction. (Microbial infection) Acts as a receptor for human JC polyomavirus/JCPyV. |
| Protein Name | 5-Hydroxytryptamine Receptor 2a5-Ht-25-Ht-2aSerotonin Receptor 2a |
| Database Links | Reactome: R-HSA-390666Reactome: R-HSA-416476 |
| Cellular Localisation | Cell MembraneMulti-Pass Membrane ProteinCell ProjectionDendriteAxonCytoplasmic VesicleMembraneCaveolaPresynapse |
| Alternative Protein Names | 5-Hydroxytryptamine Receptor 2a protein5-Ht-2 protein5-Ht-2a proteinSerotonin Receptor 2a proteinHTR2A proteinHTR2 protein |
Information sourced from Uniprot.org
