High-throughput N-glycoproteomics with fast liquid chromatographic separation

Area of Science:

• Biochemistry
• Proteomics
• Analytical Chemistry

Background:

• N-glycosylation is a crucial post-translational modification impacting protein structure and function.
• Mass spectrometry-based N-glycoproteomics offers detailed characterization of N-glycosylation at the intact N-glycopeptide level.
• High-throughput analysis of clinical samples necessitates faster and more efficient separation techniques.

Purpose of the Study:

• To develop a rapid and high-performance liquid chromatography gradient method for N-glycoproteomics.
• To optimize mass spectrometry parameters for enhanced throughput.
• To apply the developed method for large-scale N-glycoproteome analysis.

Main Methods:

• Development of a 1-hour liquid chromatography gradient method for N-glycopeptide separation.
• Optimization of mass spectrometry parameters for rapid data acquisition.
• Application of the method to analyze hepatocellular carcinoma tissues.

Main Results:

• Identification of 5,218 intact N-glycopeptides.
• Discovery of 422 site- and structure-specific differential N-glycosylations on 145 N-glycoproteins.
• Demonstration of a substantial increase in analytical throughput.

Conclusions:

• The developed 1-hour LC-N-glycoproteomics method significantly increases throughput for large-scale analyses.
• This method is suitable for efficient and fast characterization of N-glycoproteomes.
• The approach facilitates biomarker discovery in large clinical cohorts.