RiboBright reveals cell-type-specific differences in ribosome organization and movement

Area of Science:

• Molecular Biology
• Cell Biology
• Biochemistry

Background:

• Ribosomes are essential for protein synthesis in all organisms.
• Understanding ribosome dynamics, organization, and translational activity is key to deciphering their complex roles.
• Current methods for studying ribosomes can be limited in scope and application.

Purpose of the Study:

• To develop a novel fluorescent probe, RiboBright, for selective labeling and imaging of eukaryotic ribosomes.
• To demonstrate the utility of RiboBright in quantifying ribosome content and tracking ribosome dynamics in various cell types.
• To investigate lineage-specific changes in ribosome characteristics during cellular differentiation.

Main Methods:

• Synthesis of RiboBright via C-H activation and fluorescent modification of cycloheximide.
• Application of RiboBright in microscopy and flow cytometry for ribosome quantification.
• Utilizing RiboBright in live and fixed cells for tracking movement and visualizing sub-micrometer structures.

Main Results:

• RiboBright successfully quantified ribosome content across 10 different cell lines.
• The probe enabled real-time tracking of ribosome movement in live cells and visualization of ribosome organization in fixed cells.
• RiboBright revealed distinct patterns of ribosome content, organization, and movement during differentiation into endoderm and ectoderm lineages.

Conclusions:

• RiboBright is a versatile and effective fluorescent probe for studying eukaryotic ribosomes.
• The probe facilitates detailed imaging of cellular ribosome dynamics at the single-cell level.
• RiboBright offers a convenient approach for investigating ribosome biology and its implications in cellular processes.