A few circadian ‘evening’ neurons within the Drosophila brain play a key role in driving activity as well as keeping time, whereas the well-known PDF-containing morning cells are likely involved in integrating and transmitting light information.
Salt-inducible kinase 3 (SIK3) is an essential component of the mammalian circadian clock machinery, which governs robust circadian behavioral and other rhythms by destabilization of a core clock protein PER2 in a phosphorylation-dependent manner.
Circadian neutrophil infiltration in the liver modulates liver clock-gene expression and daily hepatic metabolism through the secretion of elastase and activation of JNK-FGF21-Bmal1 axis in the hepatocyte.
Synchronized feeding and metabolic patterns with environmental light–dark cycles is critical to maintain energy homeostasis and requires the activity of leptin-receptor neurons in the dorsomedial hypothalamus.
A screen targeting RNA-associated proteins reveals that PSI regulates timeless alternative splicing and thus controls the period of Drosophila circadian behavior and its phase under temperature cycles.
Acetylation of the circadian transcription factor BMAL1 by the acetyltransferase TIP60 is crucial for recruitment of the pause release factors to clock gene promoters and productive elongation of these genes.