Interactions of Circadian Clock Proteins
Author Information
Author(s): Langmesser Sonja, Tallone Tiziano, Bordon Alain, Rusconi Sandro, Albrecht Urs
Primary Institution: University of Fribourg
Hypothesis
How do the positive and negative components of the circadian clock interact?
Conclusion
The study shows that PER2, CRY1, and CRY2 interact differently with BMAL1 and CLOCK, with CRY proteins being stronger repressors than PER proteins.
Supporting Evidence
- PER2, CRY1, and CRY2 were found to interact with BMAL1.
- Only PER2 interacts with CLOCK.
- CRY proteins have a higher affinity to BMAL1 than PER2.
- Different domains in BMAL1 are bound by PER2, CRY1, and CRY2.
Takeaway
This study looks at how certain proteins that control our body's internal clock interact with each other, helping us understand how they work together.
Methodology
The interactions were characterized using a mammalian two-hybrid system and co-immunoprecipitation assays.
Limitations
The interactions could not be confirmed in vitro, suggesting the need for post-translational modifications or bridging proteins.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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