1cq0
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SOLUTION STRUCTURE OF A HUMAN HYPOCRETIN-2/OREXIN-B'SOLUTION STRUCTURE OF A HUMAN HYPOCRETIN-2/OREXIN-B '
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Structural highlights
DiseaseOREX_HUMAN Defects in HCRT are the cause of narcolepsy type 1 (NRCLP1) [MIM:161400. Narcolepsy is a neurological disabling sleep disorder, characterized by excessive daytime sleepiness, sleep fragmentation, symptoms of abnormal rapid-eye-movement (REM) sleep, such as cataplexy, hypnagogic hallucinations, and sleep paralysis. Cataplexy is a sudden loss of muscle tone triggered by emotions, which is the most valuable clinical feature used to diagnose narcolepsy. Human narcolepsy is primarily a sporadically occurring disorder but familial clustering has been observed. Note=Human narcolepsy is associated with a deficient orexin system. Orexins are absent and/or greatly diminished in the brain and cerebrospinal fluid (CSF) of most narcoleptic patients.[1] FunctionOREX_HUMAN Neuropeptides that play a significant role in the regulation of food intake and sleep-wakefulness, possibly by coordinating the complex behavioral and physiologic responses of these complementary homeostatic functions. A broader role in the homeostatic regulation of energy metabolism, autonomic function, hormonal balance and the regulation of body fluids, is also suggested. Orexin-A binds to both OX1R and OX2R with a high affinity, whereas orexin-B binds only to OX2R with a similar high affinity. See AlsoReferences
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This page was last modified 08:06, 10 April 2024.