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nociceptin receptor
The nociceptin receptor or NOP also known as the orphanin FQ receptor or kappa-type 3 opioid receptor is a protein that in humans is encoded by the ''OPRL1'' (opioid receptor-like 1) gene. The nociceptin receptor is a G protein-coupled receptor whose natural ligand is known as nociceptin or orphanin FQ, a 17 amino acid neuropeptide. This receptor is involved in the regulation of numerous brain activities, particularly instinctive and emotional behaviors.〔(【引用サイトリンク】 url = http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=4987 )〕
==Mechanism==
Nociceptin is thought to be an endogenous antagonist of dopamine transport that may act either directly on dopamine or by inhibiting GABA to affect dopamine levels. Within the central nervous system its action can be either similar or opposite to those of opioids depending on their location. It controls a wide range of biological functions ranging from nociception to food intake, from memory processes to cardiovascular and renal functions, from spontaneous locomotor activity to gastrointestinal motility, from anxiety to the control of neurotransmitter release at peripheral and central sites.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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