A novel fluorescent timer based on bicistronic expression strategy in Caenorhabditis elegans

Area of Science:

• Molecular Biology
• Developmental Biology
• Genetics

Background:

• Fluorescent proteins are valuable for visualizing cellular processes.
• Understanding gene expression dynamics is crucial for developmental studies.
• Existing methods may lack temporal resolution for certain biological events.

Purpose of the Study:

• To develop a novel fluorescent timer for monitoring gene activity in vivo.
• To utilize the trans-splicing mechanism in Caenorhabditis elegans for timer construction.
• To assess the temporal activity of specific promoters during development.

Main Methods:

• Constructed a "fluorescent timer" using bicistronic expression of fluorescent proteins with distinct maturation times.
• Leveraged the trans-splicing mechanism in Caenorhabditis elegans.
• Applied the timer in vivo to monitor promoter activity in C. elegans.

Main Results:

• The fluorescent timer successfully reported time-dependent promoter activity.
• Demonstrated the myo-3 promoter activates approximately 7 hours post-egg-laying.
• Tracked myo-3 promoter activity throughout the hatching process and larval development.

Conclusions:

• The developed fluorescent timer is effective for studying spatial and temporal gene expression.
• Provides insights into the precise timing of myo-3 promoter activation during C. elegans development.
• Suggests potential for designing new fluorescent timers with varied temporal resolutions.