Activating PER Repressor through a DBT-Directed Phosphorylation Switch
2008
How Phosphorylation Affects Circadian Clock Proteins
publication
Evidence: moderate
Author Information
Author(s): Ying-Hui Fu
Primary Institution: University of California San Francisco
Hypothesis
The phosphorylation status of circadian clock proteins regulates their activity and stability.
Conclusion
Phosphorylation of specific sites on the PER protein influences its repressor activity and stability, affecting circadian rhythms.
Supporting Evidence
- Phosphorylation of the PER protein can target it for degradation, affecting circadian timing.
- Mutations in the human period homolog hPER2 can lead to altered sleep patterns.
- The study highlights conserved mechanisms of circadian regulation across species.
Takeaway
This study shows that tiny changes in proteins can change how our body keeps time, like a clock. If a part of the protein is changed, it can make the clock run faster or slower.
Methodology
The study involved genetic and biochemical analyses of phosphorylation effects on circadian clock proteins in Drosophila and mammals.
Digital Object Identifier (DOI)
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