Aliases for HRH1 Gene
External Ids for HRH1 Gene
Previous GeneCards Identifiers for HRH1 Gene
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. The protein encoded by this gene is an integral membrane protein and belongs to the G protein-coupled receptor superfamily. It mediates the contraction of smooth muscles, the increase in capillary permeability due to contraction of terminal venules, the release of catecholamine from adrenal medulla, and neurotransmission in the central nervous system. It has been associated with multiple processes, including memory and learning, circadian rhythm, and thermoregulation. It is also known to contribute to the pathophysiology of allergic diseases such as atopic dermatitis, asthma, anaphylaxis and allergic rhinitis. Multiple alternatively spliced variants, encoding the same protein, have been identified. [provided by RefSeq, Jan 2015]
GeneCards Summary for HRH1 Gene
HRH1 (Histamine Receptor H1) is a Protein Coding gene. Diseases associated with HRH1 include rhinitis and allergic rhinitis. Among its related pathways are Signaling by GPCR and Interleukin-3, 5 and GM-CSF signaling. GO annotations related to this gene include G-protein coupled receptor activity and histamine binding. An important paralog of this gene is CHRM4.
UniProtKB/Swiss-Prot for HRH1 Gene
In peripheral tissues, the H1 subclass of histamine receptors mediates the contraction of smooth muscles, increase in capillary permeability due to contraction of terminal venules, and catecholamine release from adrenal medulla, as well as mediating neurotransmission in the central nervous system.
Histamine H1 receptors are Galphaq/11-protein-coupled receptors that mediate allergic responses. These receptors are expressed in a wide variety of tissues including the gastrointestinal tract, CNS, airway and vascular smooth muscle cells and endothelial cells.