Words similar to bmal
Example sentences for: bmal
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A recent study in Drosophila melanogaster implicates transcriptional regulation by the circadian gene cycle , a homolog of the mammalian bmal1 gene, in the homeostatic regulation of rest [ 16 ] . While rest in flies shares several features with sleep in mammals [ 17 18 ] , it remains to be determined whether a similar role for BMAL1 or related transcriptional regulators is necessary for the homeostatic regulation of sleep.
In mammals, the positive elements are two basic helix-loop-helix (bHLH) PAS-domain-containing transcription factors, CLOCK and BMAL1, that form heterodimers that can drive the transcription of three period ( per ) genes per1-3 and two cryptochromes ( cry1,2 ). PER1,2 and CRY1,2 proteins suppress CLOCK:BMAL1-mediated transcription thereby forming the negative elements in the feedback loop.
Interestingly, in the latter study rNoc was identified among a group of clock-regulated genes that included Per1 , Per2 , Per3 , Bmal1 , and D-binding protein ( DBP ). Independent clock driven pathways may be critical in the function of many tissues and organs as suggested by the widespread expression of clock genes in peripheral tissues [ 7, 8, 10, 11, 12].
In the discussion, we have focused on per1,2 mRNAs as transcriptional targets of cry1,2 because the expression patterns of these circadian genes have been widely described and because their transcriptional control by CRY proteins and by CLOCK/NPAS2:BMAL1 has been well established.
Upon release into constant darkness cry1,2 -/-mice immediately become arrhythmic at the behavioral level [ 22 23 ] , at the level of SCN electrophysiology [ 28 ] , and at the cellular/molecular level [ 23 ] . Of the available mouse models for circadian dysfunction, only per1,2 double mutant mice [ 29 ] , bmal1 knockout mice [ 30 ] , and mice with an ablation of the SCN [ 31 ] show a similarly dramatic phenotype.
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