Ribosome Profiling of Plants

Area of Science:

• Molecular Biology
• Plant Virology
• Genomics

Background:

• Gene expression is primarily controlled at the transcriptional level, but translational control is critical for RNA viruses and host responses.
• Existing methods often overlook global translation, focusing instead on transcription and the transcriptome.

Purpose of the Study:

• To detail a robust protocol for ribosome profiling (ribo-seq) in plants, specifically for analyzing virus-host interactions.
• To enable quantitative characterization of the plant translatome during stress conditions.

Main Methods:

• Ribosome profiling (ribo-seq) involves deep sequencing of ribosome-protected fragments (RPFs) to capture a snapshot of actively translating ribosomes.
• Key steps include cell lysate preparation, ribonuclease digestion, monosome isolation, RNA extraction, library preparation, and data quality control.

Main Results:

• Ribo-seq provides a quantitative measure of translational efficiency by comparing RPFs to total mRNA (RNA-seq).
• The technique allows for precise mapping of ribosome positions, identification of novel translatable open reading frames, and characterization of noncanonical translation.

Conclusions:

• This detailed protocol facilitates the study of plant virus gene expression and global translational responses to various stresses.
• Ribo-seq is a valuable tool for understanding host-pathogen interactions at the translational level in plants.