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A Plasma Sample Preparation for Mass Spectrometry using an Automated Workstation
Published on: April 24, 2020
Practical considerations for improving the productivity of mass spectrometry-based proteomics
Unige A Laskay1, Kristina Srzentić, Luca Fornelli
1Biomolecular Mass Spectrometry Laboratory, Ecole Polytechnique Fédérale de Lausanne, EPFL LSMB BCH 4307, CH-1015 Lausanne.
Chimia
|August 24, 2013
Summary
Middle-down proteomics offers a powerful approach for protein analysis by digesting proteins into larger peptides. This method combines benefits of top-down and bottom-up proteomics for enhanced structural insights.
Area of Science:
- Proteomics
- Analytical Chemistry
- Biochemistry
Background:
- Mass spectrometry (MS) is a key technique for protein and peptide analysis.
- Top-down and bottom-up proteomics have limitations in protein structure analysis.
- Middle-down proteomics aims to combine the advantages of both approaches.
Purpose of the Study:
- To present a middle-down proteomics workflow.
- To couple liquid chromatography-tandem mass spectrometry (LC-MS/MS) with post-LC supercharging.
- To enable routine implementation of middle-down proteomics.
Main Methods:
- Protein digestion into long peptides (3-15 kDa) via restricted proteolysis.
- Tandem mass spectrometry (MS/MS) analysis of these peptides.
- Liquid chromatography (LC)-MS/MS coupled with post-LC supercharging.
Main Results:
- Development of a robust middle-down proteomic workflow.
- Successful application of LC-MS/MS with supercharging for analyzing long peptides.
- Demonstration of the feasibility of routine middle-down proteomics.
Conclusions:
- Middle-down proteomics provides a valuable strategy for detailed protein analysis.
- The presented workflow enhances protein structure and modification analysis.
- Advancements in high-resolution MS facilitate the routine use of middle-down proteomics.
