Efficient analysis of mammalian polysomes in cells and tissues using Ribo Mega-SEC

Area of Science:

• Molecular Biology
• Biochemistry
• Cell Biology

Background:

• Mammalian polysomes and ribosomal subunits are crucial for protein synthesis.
• Understanding the composition and dynamics of these complexes is vital for cellular function.
• Current methods for analyzing translation complexes can be time-consuming and complex.

Purpose of the Study:

• To introduce Ribo Mega-SEC, a novel and efficient method for polysome and ribosomal subunit analysis.
• To demonstrate the utility of Ribo Mega-SEC in studying translation dynamics and cellular responses.
• To showcase the compatibility of Ribo Mega-SEC with downstream applications like proteomics and electron microscopy.

Main Methods:

• Ribo Mega-SEC utilizes Size Exclusion Chromatography and ultra-High Performance Liquid Chromatography (uHPLC).
• The method allows for rapid separation of polysomes and ribosomal subunits from cell or tissue extracts.
• Analysis is completed within 15 minutes from sample injection to fraction collection.

Main Results:

• Ribo Mega-SEC demonstrates that translating ribosomes predominantly exist in polysome complexes in human cell lines and mouse liver.
• The method effectively quantifies changes in polysome profiles, such as in response to amino acid starvation.
• Ribo Mega-SEC is highly reproducible and convenient for studying functional translation complexes.

Conclusions:

• Ribo Mega-SEC offers an efficient, convenient, and reproducible approach for the biochemical analysis of mammalian polysomes and ribosomal subunits.
• This method provides valuable insights into the state of translation and cellular responses.
• Ribo Mega-SEC integrates seamlessly with high-throughput proteomics and structural biology techniques.