Activating PER Repressor through a DBT-Directed Phosphorylation Switch
Author Information
Author(s): Kivimäe Saul, Saez Lino, Young Michael W
Primary Institution: Laboratory of Genetics, The Rockefeller University, New York, New York, United States of America
Hypothesis
This study examines the role of the protein kinase Doubletime (DBT) in phosphorylating the Drosophila clock protein Period (PER) and its effects on circadian rhythms.
Conclusion
DBT-directed phosphorylation regulates the stability and activity of the PER protein, influencing the timing of circadian rhythms.
Supporting Evidence
- DBT directly phosphorylates the Drosophila clock protein Period (PER).
- Mutations in DBT alter the period of circadian rhythms in Drosophila.
- Phosphorylation of PER by DBT affects its stability and repressor function.
Takeaway
This study found that a protein called DBT helps control another protein, PER, which is important for keeping our body clocks in sync. When DBT adds special tags to PER, it changes how long PER lasts and how well it works.
Methodology
The study used genetic and biochemical approaches to map DBT-directed phosphorylation sites in PER, assessing their functional significance in cultured cells and living flies.
Limitations
The study does not determine whether the phosphorylation sites identified in vitro correspond to those phosphorylated in vivo.
Digital Object Identifier (DOI)
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