Swift Universal Glycan Acquisition (SUGA) Enables Quantitative Glycan Profiling across Diverse Sample Types

Area of Science:

• Glycomics
• Mass Spectrometry
• Biochemistry

Background:

• Analyzing complex glycan mixtures from glycoproteins is crucial but often hindered by laborious, multi-step derivatization techniques.
• Existing methods for N-glycan analysis can be time-consuming and require extensive sample preparation.

Purpose of the Study:

• To introduce a novel, rapid, and direct analysis method for N-glycans called Swift Universal Glycan Acquisition (SUGA).
• To enable high-throughput and efficient characterization of N-glycans from various biological sources.

Main Methods:

• SUGA involves direct injection of total released, nonreduced N-glycan samples into an electrospray ionization mass spectrometer.
• Utilizes a rapid 3-minute run time per sample, employing MS1 for glycan composition detection and MS2 for confident identification via spectral annotation.
• Data deconvolution is performed to manage multiple charge states and adducts, yielding relative intensity profiles for each glycan composition.

Main Results:

• SUGA provides glycan identification comparable to traditional permethylation followed by MALDI-MS analysis.
• The method was successfully applied to analyze N-glycans from purified glycoproteins and cell-derived samples.
• Demonstrated the capability for rapid and high-throughput analysis of N-glycans.

Conclusions:

• SUGA significantly streamlines N-glycan analysis by eliminating derivatization steps.
• This approach facilitates faster and more efficient glycomic studies across diverse biological samples.
• SUGA represents a valuable tool for advancing glycomics research and biomarker discovery.