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Deep Proteome Profiling by Isobaric Labeling, Extensive Liquid Chromatography, Mass Spectrometry, and Software-assisted Quantification
Published on: November 15, 2017
Multidimensional capillary array liquid chromatography and matrix-assisted laser desorption/ionization tandem mass
1Department of Biochemistry and Molecular Biology, Second Military Medical University, Shanghai 200433, China. Liuc109@yahoo.com
Journal of Chromatography. A
|November 28, 2006
Summary
A novel two-dimensional liquid chromatography (2D-LC) system significantly accelerates proteomic analysis. This high-throughput system achieves rapid separation and identification of thousands of peptides and proteins from complex samples.
Area of Science:
- Analytical Chemistry
- Proteomics
- Mass Spectrometry
Background:
- High-throughput proteomic analysis is crucial for understanding complex biological systems.
- Existing two-dimensional liquid chromatography (2D-LC) methods can be time-consuming.
- Efficient separation and identification of peptides and proteins are essential for biomarker discovery.
Purpose of the Study:
- To develop a novel, high-throughput 2D-LC system for comprehensive proteomic analysis.
- To achieve rapid separation and on-line matrix-assisted laser desorption/ionization (MALDI) deposition.
- To enhance the speed and efficiency of proteomic workflows.
Main Methods:
- Development of a 2D-LC system combining strong cation-exchange (SCX) and parallel reversed-phase liquid chromatography (RPLC) capillary columns.
- Design and fabrication of a novel multi-channel interface for on-line coupling.
- Utilized ten parallel RPLC columns and micro-splitter valves for stop-and-flow switching and matrix mixing.
Main Results:
- The developed system achieved rapid 2D-LC separation in 150 minutes for complex proteome samples.
- Successfully separated and deposited thousands of peptides on MALDI plates.
- Identified over 1202 proteins from a liver cancer tissue sample using high-throughput tandem time-of-flight mass spectrometry.
Conclusions:
- The parallel 2D-LC system offers a significantly faster analytical procedure (approximately 10-fold) compared to conventional 2D-LC.
- The system is highly effective for high-throughput proteomic analysis of complex biological samples.
- This technology advances rapid protein identification and has potential applications in disease research.
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