Search results for "Bacterial circadian rhythms"

showing 3 items of 3 documents

How is the inner circadian clock controlled by interactive clock proteins?

2015

AbstractMost internationally travelled researchers will have encountered jetlag. If not, working odd hours makes most of us feel somehow dysfunctional. How can all this be linked to circadian rhythms and circadian clocks? In this review, we define circadian clocks, their composition and underlying molecular mechanisms. We describe and discuss recent crystal structures of Drosophila and mammalian core clock components and the enormous impact they had on the understanding of circadian clock mechanisms. Finally, we highlight the importance of circadian clocks for the daily regulation of human/mammalian physiology and show connections to overall fitness, health and disease.

Drosophila and mammalian clock proteinCircadian rhythmCircadian clock mechanismProtein ConformationCircadian clockBiophysicsCLOCK Proteins3D crystal structureCell BiologyBiologyBiochemistryBacterial circadian rhythmsCell biologyStructural BiologyCircadian ClocksGeneticsAnimalsHumansCLOCK ProteinsCircadian rhythmOscillating geneMolecular BiologyNeuroscienceFEBS Letters
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Copper homeostasis influences the circadian clock in Arabidopsis.

2010

Almost every aspect of plant physiology is influenced by diurnal and seasonal environmental cycles which suggests that biochemical oscillations must be a pervasive phenomenon in the underlying molecular organization. The circadian clock is entrained by light and temperature cycles, and controls a wide variety of endogenous processes that enable plants to anticipate the daily periodicity of environmental conditions. Several previous reports suggest a connection between copper (Cu) homeostasis and the circadian clock in different organisms other than plants. However, the nature of the Cu homeostasis influence on chronobiology remains elusive. Cytosolic Cu content could oscillate since Cu regu…

GeneticsChronobiologybiologyCircadian clockArabidopsisPlant physiologyEndogenyPlant Sciencebiology.organism_classificationModels BiologicalBacterial circadian rhythmsCell biologyCircadian RhythmArticle AddendumPhenotypeSeedlingsArabidopsisCircadian ClocksHomeostasisMYBCircadian rhythmLuciferasesPromoter Regions GeneticCopperPlant signalingbehavior
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Circadian and Infradian Activity Rhythms in the Mammalian Pineal Body

1982

The neuroendocrine nature of the pineal organ is well established. Linked to the optic system via postganglionic sympathetic fibres coming from the superior cervical ganglia, the parenchymal cells of the pineal synthesize serotonin from tryptophan and convert it to melatonin, the most widely studied pineal substance, and other indoleamines. Melatonin synthesis is stimulated by noradrenaline released from intrapineal sympathetic nerve fibres, involving β-adrenergic mechanisms and the adenyl cyclase-cAMP-system. The rate-limiting enzyme of melatonin formation is serotonin-N-acetyltransferase (NAT) that converts serotonin to N-acetylserotonin. Hydroxyindole-O-methyltransferase (HIOMT) catalyze…

Synaptic ribbonendocrine systemmedicine.medical_specialtyChemistryGerbilBacterial circadian rhythmsMelatoninPineal glandmedicine.anatomical_structureEndocrinologyInfradian rhythmInternal medicinemedicineSerotoninCircadian rhythmhormones hormone substitutes and hormone antagonistsmedicine.drug
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