Light-dependent interaction between Drosophila CRY and the clock protein PER mediated by the carboxy terminus of CRY

Jul 13, 2001Current biology : CB

Light-dependent interaction between Drosophila's light-sensing protein and its internal clock protein involving the tail end of the light sensor

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Abstract

Behavioral analysis of double mutants of per and cry indicates a genetic interaction between these two loci.

  • Drosophila CRYPTOCHROME (CRY) shows a previously unreported physical interaction with PERIOD (PER).
  • A yeast-two-hybrid system confirmed dimerization between CRY and PER.
  • Coimmunoprecipitation assays in tissue culture cells further supported the interaction.
  • The light-dependent interactions of PER and TIMELESS (TIM) with CRY require the C terminus of CRY.
  • The findings suggest that CRY's role in light responses may extend beyond its interactions with TIM.

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