Spinach-based RNA mimicking GFP in plant cells

Area of Science:

• Molecular Biology
• Plant Science
• Biotechnology

Background:

• Spinach RNA-mimicking GFP (S-RMG) is a tool for monitoring cellular RNAs in various organisms.
• S-RMG has not been previously established or validated in plant systems.
• RNA visualization techniques are crucial for understanding gene expression and cellular processes.

Purpose of the Study:

• To establish and evaluate the Spinach RNA-mimicking GFP (S-RMG) system for in vivo RNA visualization in plant cells.
• To determine if plant tRNAs can support the S-RMG system for RNA detection.
• To demonstrate the potential of S-RMG for monitoring RNAs within plant cells.

Main Methods:

• Investigated the interaction between plant tRNAs (e.g., tRNA^Lys) and the Spinach RNA aptamer with the fluorophore DFHBI.
• Delivered a tRNA^Lys-Spinach-tRNA^Lys construct into "chloroplast-free" onion epidermal cells.
• Observed and quantified green fluorescence emission in the presence of DFHBI.

Main Results:

• Plant tRNAs, specifically tRNA^Lys, were found to protect and stabilize the Spinach RNA aptamer-fluorophore complex.
• The tRNA^Lys-Spinach-tRNA^Lys construct successfully emitted strong green fluorescence in onion epidermal cells.
• This indicates successful S-RMG system function in a plant cellular environment.

Conclusions:

• Spinach-based RNA visualization is feasible and effective in plant cells.
• Plant tRNAs are compatible with and can facilitate the S-RMG system for RNA monitoring.
• This study opens avenues for in vivo RNA tracking in plants using S-RMG technology.