HRH3 Antibody – Rabbit Polyclonal

Histamine is a ubiquitous messenger molecule released from mast cells, enterochromaffin-like cells, and neurons. Its various actions are mediated by histamine receptors H1, H2, H3 and H4. This gene encodes one of the histamine receptors (H3) which belongs to the family 1 of G protein-coupled receptors. It is an integral membrane protein and can regulate neurotransmitter release. This receptor can also increase voltage-dependent calcium current in smooth muscles and innervates the blood vessels and the heart in cardiovascular system. [provided by RefSeq, Jul 2008]

H3R: The H3 subclass of histamine receptors could mediate the histamine signals in CNS and peripheral nervous system. Signals through the inhibition of adenylate cyclase and displays high constitutive activity (spontaneous activity in the absence of agonist). Agonist stimulation of isoform 3 niether modified adenylate cyclase activity nor induced intracellular calcium mobilization. Belongs to the G-protein coupled receptor 1 family. 7 isoforms of the human protein are produced by alternative splicing.

Protein type: GPCR, family 1; Membrane protein, multi-pass; Receptor, GPCR; Membrane protein, integral

Chromosomal Location of Human Ortholog: 20q13.33

Cellular Component: neuron projection; integral to plasma membrane; plasma membrane; myelin sheath

Molecular Function: drug binding; histamine receptor activity

Biological Process: negative regulation of glutamate secretion; eating behavior; neurotransmitter secretion; drinking behavior; negative regulation of gamma-aminobutyric acid secretion; negative regulation of adenylate cyclase activity; learning; regulation of norepinephrine secretion; response to organic cyclic substance; memory; negative regulation of serotonin secretion; G-protein signaling, coupled to cyclic nucleotide second messenger; elevation of cytosolic calcium ion concentration; negative regulation of blood pressure; brain development; positive regulation of epithelial cell proliferation