A toolkit for DNA assembly, genome engineering and multicolor imaging for C. elegans.

Area of Science:

• Cell biology
• Genetics
• Biotechnology

Background:

• Observing cellular processes requires quantifying signals from fluorescent proteins in engineered animals.
• Accurate quantification of mixed fluorescent signals is crucial for gene expression and aging research in C. elegans.

Purpose of the Study:

• To develop a comprehensive toolkit for C. elegans to confidently quantify mixed fluorescent signals.
• To provide a resource for multidimensional imaging experiments in C. elegans.

Main Methods:

• Developed a toolkit with yeast homologous recombination (HR) vectors for DNA assembly.
• Created ten C. elegans strains expressing single, spectrally distinct fluorescent proteins under specific promoters.
• Measured in vivo emission spectra of fluorescent proteins in live C. elegans.

Main Results:

• Successfully unmixed overlapping fluorescent signals in spectral images of intestine cells using pure spectra.
• Identified localization of seven fluorescent proteins in vesicular/elliptical foci or tubules in the hypodermis.
• FRAP experiments indicated freely diffusing protein kinetics for observed structures.

Conclusions:

• The toolkit enables efficient generation of multi-fragment DNA assemblies for C. elegans genome editing.
• The transgenic C. elegans strains and emission spectra serve as a valuable resource for multicolor imaging experiments.
• This toolkit enhances the ability to perform quantitative analysis of cellular processes in C. elegans.