A general method for quantitative fractionation of mammalian cells

Area of Science:

• Cell Biology
• Proteomics
• Biochemistry

Background:

• Subcellular fractionation coupled with mass spectrometry is crucial for understanding protein localization in biological processes and disease.
• Existing fractionation methods can be time-consuming or compromise cellular structure, limiting their utility for proteomic analyses.

Purpose of the Study:

• To present a rapid and reliable method for mammalian cell fractionation optimized for mass spectrometry-based proteomics.
• To ensure the method accounts for all cellular contents while maintaining the integrity of the nucleus and nuclear envelope.

Main Methods:

• Development of a novel mammalian cell fractionation protocol.
• Application of the method to various cell lines.
• Validation of nuclear and nuclear envelope integrity post-fractionation.
• Proteomic analysis of fractionated samples.

Main Results:

• The developed method is rapid, reliable, and applicable to diverse mammalian cell lines.
• Complete recovery of cellular contents was achieved, with intact nuclear and nuclear envelope structures.
• The method's utility was demonstrated by analyzing proteome changes in response to a nuclear export inhibitor.

Conclusions:

• This optimized cell fractionation technique provides a robust platform for high-throughput proteomic studies of protein localization.
• The method facilitates accurate quantification of proteome dynamics between cellular compartments, aiding research in health and disease.