The distribution of PKR2 is relatively restricted with high expression levels in the brain, spinal cord and dorsal root ganglions, in organs of the reproductive system and in endocrine tissues such as the thyroid, pituitary and adrenal glands.nThe PK2 ligand has been shown to be involved in the regulation of circadian rhythms of physiological and behavioral processes in mammals, probably through signaling via PKR2 which is highly expressed in the suprachiasmatic nucleus (SCN), an area of the brain that controls circadian rhythm processes.nIn addition, loss of function mutations in the PKR2 gene have been associated with Kallmann Syndrome, a condition characterized by idiopathic hypogonadotropic hypogonadism (IHH) in combination with anosmia, a compromised sense of smell.
