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Single-cell Resolution Fluorescence Live Imaging of Drosophila Circadian Clocks in Larval Brain Culture
Published on: January 19, 2018
Coiled-coil domain-mediated FRQ-FRQ interaction is essential for its circadian clock function in Neurospora
1Department of Physiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-9040, USA.
The EMBO Journal
|February 28, 2001
Summary
The frequency (frq) protein
Area of Science:
- Biochemistry
- Molecular Biology
- Circadian Rhythms
Background:
- The frequency (frq) gene is central to the circadian clock in Neurospora.
- The biochemical function of its protein product, FRQ, remains largely unknown.
Purpose of the Study:
- To elucidate the biochemical function of the FRQ protein.
- To investigate the role of FRQ self-interaction in circadian clock regulation.
Main Methods:
- Analysis of FRQ protein structure, focusing on conserved regions.
- In vivo interaction studies using FRQ deletion and point mutants.
- Assessment of circadian rhythmicity in mutant strains.
Main Results:
- Identified a coiled-coil domain in the most conserved region of FRQ.
- Demonstrated that FRQ self-associates in vivo via this coiled-coil domain.
- Disruption of the coiled-coil domain abolished FRQ self-association and led to arrhythmicity.
- Mutations affecting FRQ self-association also prevented interaction with WC-1 and WC-2.
Conclusions:
- FRQ self-association through its coiled-coil domain is crucial for circadian clock function.
- The FRQ-FRQ interaction is essential for the formation of functional FRQ-WC complexes.
- Proper assembly of FRQ-based complexes is vital for maintaining circadian rhythms in Neurospora.
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