Global Identification of Human Exosome Substrates Using RNA Interference and RNA Sequencing

Area of Science:

• Molecular Biology
• Cell Biology
• Genetics

Background:

• The RNA exosome is a crucial multi-subunit complex responsible for RNA processing and degradation.
• It comprises a core structure and associated factors that regulate its activity and substrate specificity.
• Identifying the RNA exosome's targets is essential for understanding RNA metabolism and quality control.

Purpose of the Study:

• To establish and validate an experimental pipeline for identifying RNA exosome targets.
• To investigate the impact of RNA exosome component depletion on transcript stability.
• To provide a method for both manual and high-throughput identification of exosome substrates.

Main Methods:

• Utilized siRNA-mediated depletion of RNA exosome subunits and cofactors in HeLa cells.
• Confirmed knockdown efficiency using appropriate molecular biology techniques.
• Employed manual and high-throughput methods to identify stabilized transcripts (potential exosome targets).

Main Results:

• Successfully implemented a pipeline for depleting RNA exosome components.
• Demonstrated the ability to identify transcripts that accumulate upon exosome depletion.
• Validated the pipeline for both small-scale and large-scale target identification.

Conclusions:

• The described experimental pipeline is effective for identifying RNA exosome targets.
• This methodology facilitates the study of RNA processing and degradation pathways.
• The approach aids in understanding the roles of the RNA exosome in cellular RNA homeostasis.