Results 41 to 50 of about 356,744 (339)

The Jumonji C Domain-Containing Protein JMJ30 Regulates Period Length in the Arabidopsis Circadian Clock [PDF]

open access: hybridPlant Physiology, 2010
Abstract Histone methylation plays an essential role in regulating chromatin structure and gene expression. Jumonji C (JmjC) domain-containing proteins are generally known as histone demethylases. Circadian clocks regulate a large number of biological processes, and recent studies suggest that chromatin remodeling has evolved as an ...
Sheen X. Lu   +6 more
openalex   +5 more sources

timrit Lengthens Circadian Period in a Temperature-Dependent Manner through Suppression of PERIOD Protein Cycling and Nuclear Localization [PDF]

open access: greenMolecular and Cellular Biology, 1999
A fundamental feature of circadian clocks is temperature compensation of period. The free-running period of ritsu (timrit) (a novel allele of timeless [tim]) mutants is drastically lengthened in a temperature-dependent manner. PER and TIM protein levels become lower in timrit mutants as temperature becomes higher. This mutation reduces per mRNA but not
Akira Matsumoto   +3 more
openalex   +4 more sources

Setting Clock Speed in Mammals: The CK1ɛ tau Mutation in Mice Accelerates Circadian Pacemakers by Selectively Destabilizing PERIOD Proteins [PDF]

open access: bronzeNeuron, 2008
Qing‐Jun Meng   +17 more
openalex   +2 more sources

Sex-specific attenuation of constant light-induced memory impairment and Clock gene expression in brain in hepatic Npas2 knockout mice [PDF]

open access: yesScientific Reports
NPAS2 (Neuronal PAS Domain Protein 2) is a component of the core circadian clock and the coordinated activity between central brain and peripheral liver clock proteins postulated to be instrumental for linking behaviour and metabolism.
Ruby Chrisp   +10 more
doaj   +2 more sources

CYCLE Is a Second bHLH-PAS Clock Protein Essential for Circadian Rhythmicity and Transcription of Drosophila period and timeless [PDF]

open access: bronzeCell, 1998
We report the identification, characterization, and cloning of another novel Drosophila clock gene, cycle (cyc). Homozygous cyc flies are completely arrhythmic. Heterozygous cyc/+ flies are rhythmic but have altered periods, indicating that the cyc locus has a dosage effect on period.
Joan E. Rutila   +5 more
openalex   +4 more sources

Cry1 expression during postnatal development is critical for the establishment of normal circadian period

open access: yesFrontiers in Neuroscience, 2023
The mammalian circadian system generates an approximate 24-h rhythm through a complex autoregulatory feedback loop. Four genes, Period1 (Per1), Period2 (Per2), Cryptochrome1 (Cry1), and Cryptochrome2 (Cry2), regulate the negative feedback within this ...
Aaron E. Schirmer   +11 more
doaj   +1 more source

Astrocytes Sustain Circadian Oscillation and Bidirectionally Determine Circadian Period, But Do Not Regulate Circadian Phase in the Suprachiasmatic Nucleus

open access: yesJournal of Neuroscience, 2022
The suprachiasmatic nucleus (SCN) is the master circadian clock of mammals, generating and transmitting an internal representation of environmental time that is produced by the cell-autonomous transcriptional/post-translational feedback loops (TTFLs) of ...
A. P. Patton   +3 more
semanticscholar   +1 more source

Cryptochrome proteins regulate the circadian intracellular behavior and localization of PER2 in mouse suprachiasmatic nucleus neurons

open access: yesProceedings of the National Academy of Sciences of the United States of America, 2022
Significance The suprachiasmatic nucleus (SCN), the master circadian clock of the mammalian brain, coordinates cellular clocks across the organism to regulate daily rhythms of physiology and behavior.
Nicola J. Smyllie   +9 more
semanticscholar   +1 more source

population analysis of the CLOCK rs3749474T-rs4864548A haplotype and its relationship with obesity

open access: yesMedwave, 2023
It has been suggested that the rs3749474T/rs4864548A haplotype of the CLOCK gene increases the risk of obesity, but the population variability of these alleles and the haplotype is unknown.
Sergio Flores Carrasco   +2 more
doaj   +1 more source

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