NIACR
The known human niacin receptors (or nicotinic acid receptors, abbreviated NIACR) are: * Niacin receptor 1 (NIACR1, formerly known as GPR109A) * Niacin receptor 2 (NIACR2, formerly known as GPR109B) {{set index ...
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Hydroxycarboxylic Acid Receptor 2
Hydroxycarboxylic acid receptor 2 (HCA2), also known as niacin receptor 1 (NIACR1) and GPR109A, is a protein which in humans is encoded by the ''HCAR2'' gene. HCA2, like the other hydroxycarboxylic acid receptors HCA1 and HCA3, is a Gi/o-coupled G protein-coupled receptor (GPCR). The primary endogenous agonists of HCA2 are -β-hydroxybutyric acid and butyric acid (and their conjugate bases, β-hydroxybutyrate and butyrate). HCA2 is also a high-affinity biomolecular target for niacin (aka nicotinic acid). HCA2 activation inhibits lipolytic and atherogenic activity (i.e., it inhibits the breakdown of fats and the development of atherosclerosis), induces vasodilation (i.e., the dilation of blood vessels), and is responsible for mediating niacin-induced flushing. Function HCA2 is a high-affinity Gi/ Go-coupled G protein-coupled receptor (GPCR) for nicotinic acid (niacin), and is a member of the nicotinic acid receptor family of GPCRs. HCA2 activation inhibits lipolytic and at ...
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