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Citation
Zheng, H., Ng, F., Liu, Y., Hardin, P.E. (2008). Spatial and circadian regulation of cry in Drosophila.  J. Biol. Rhythms 23(4): 283--295.
FlyBase ID
FBrf0205880
Publication Type
Research paper
Abstract
In Drosophila, cryptochrome (cry) encodes a blue-light photoreceptor that mediates light input to circadian oscillators and sustains oscillator function in peripheral tissues. The levels of cry mRNA cycle with a peak at approximately ZT5, which is similar to the phase of Clock (Clk) mRNA cycling in Drosophila. To understand how cry spatial and circadian expression is regulated, a series of cry-Gal4 trans-genes containing different portions of cry upstream and intron 1 sequences were tested for spatial and circadian expression. In fly heads, cry upstream sequences drive constitutive expression in brain oscillator neurons, a novel group of nonoscillator cells in the optic lobe, and peripheral oscillator cells in eyes and antennae. In contrast, cry intron 1 drives rhythmic expression in eyes and antennae, but not brain oscillator neurons. These results demonstrate that intron 1 is sufficient for high-amplitude cry mRNA cycling, show that cry upstream sequences are sufficient for expression in brain oscillator neurons, and suggest that cry spatial and circadian expression are regulated by different elements.
PubMed ID
PubMed Central ID
PMC2504742 (PMC) (EuropePMC)
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Secondary IDs
    Language of Publication
    English
    Additional Languages of Abstract
    Parent Publication
    Publication Type
    Journal
    Abbreviation
    J. Biol. Rhythms
    Title
    Journal of Biological Rhythms
    Publication Year
    1986-
    ISBN/ISSN
    0748-7304
    Data From Reference
    Alleles (7)
    Genes (4)
    Natural transposons (1)
    Experimental Tools (2)
    Transgenic Constructs (7)