Aliases for HTR2B Gene
External Ids for HTR2B Gene
Previous GeneCards Identifiers for HTR2B Gene
This gene encodes one of the several different receptors for 5-hydroxytryptamine (serotonin) that belongs to the G-protein coupled receptor 1 family. Serotonin is a biogenic hormone that functions as a neurotransmitter, a hormone, and a mitogen. Serotonin receptors mediate many of the central and peripheral physiologic functions of serotonin, including regulation of cardiovascular functions and impulsive behavior. Population and family-based analyses of a minor allele (glutamine-to-stop substitution, designated Q20*) which blocks expression of this protein, and knockout studies in mice, suggest a role for this gene in impulsivity. However, other factors, such as elevated testosterone levels, may also be involved. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Mar 2016]
GeneCards Summary for HTR2B Gene
HTR2B (5-Hydroxytryptamine Receptor 2B) is a Protein Coding gene. Diseases associated with HTR2B include Ocular Hypotension and Heart Valve Disease. Among its related pathways are Peptide ligand-binding receptors and Circadian entrainment. GO annotations related to this gene include G-protein coupled receptor activity and drug binding. An important paralog of this gene is HTR2A.
UniProtKB/Swiss-Prot for HTR2B Gene
G-protein coupled receptor for 5-hydroxytryptamine (serotonin). Also functions as a receptor for various ergot alkaloid derivatives 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. Beta-arrestin family members inhibit signaling via G proteins and mediate activation of alternative signaling pathways. Signaling activates a phosphatidylinositol-calcium second messenger system that modulates the activity of phosphatidylinositol 3-kinase and down-stream signaling cascades and promotes the release of Ca(2+) ions from intracellular stores. Plays a role in the regulation of dopamine and 5-hydroxytryptamine release, 5-hydroxytryptamine uptake and in the regulation of extracellular dopamine and 5-hydroxytryptamine levels, and thereby affects neural activity. May play a role in the perception of pain. Plays a role in the regulation of behavior, including impulsive behavior. Required for normal proliferation of embryonic cardiac myocytes and normal heart development. Protects cardiomyocytes against apoptosis. Plays a role in the adaptation of pulmonary arteries to chronic hypoxia. Plays a role in vasoconstriction. Required for normal osteoblast function and proliferation, and for maintaining normal bone density. Required for normal proliferation of the interstitial cells of Cajal in the intestine.
Serotonin 5-HT2B receptors, previously known as 5-HT2F receptors, are located primarily in the stomach fundus, uterus, vascular endothelial and vascular and GI smooth muscle, with limited distribution in the brain. 5-HT2B overexpression leads to ventricular hypertrophy.