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Glycopeptide Capture for Cell Surface Proteomics
Published on: May 9, 2014
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Hydrazide-functionalized affinity on conventional support materials for glycopeptide enrichment
Muhammad Salman Sajid1, Fahmida Jabeen1, Dilshad Hussain1
1Division of Analytical Chemistry, Institute of Chemical Sciences, Bahauddin Zakariya University, Bosan Road, Multan, 60800, Punjab, Pakistan.
Analytical and Bioanalytical Chemistry
|February 26, 2017
Summary
This study developed hydrazide-functionalized materials for affinity chromatography, enhancing glycopeptide enrichment from complex samples like serum. Poly(GMA/DVB) demonstrated superior sensitivity and recovery for efficient biomolecule purification.
Area of Science:
- Affinity chromatography
- Biomolecule enrichment
- Surface chemistry
Background:
- Affinity chromatography relies on selecting appropriate affinity sites immobilized on support materials for biomolecule enrichment.
- Hydrazide-functionalized materials offer versatile surface modification protocols compatible with various conventional support materials.
Purpose of the Study:
- To demonstrate modification pathways for creating hydrazide-functionalized support materials (cellulose, poly(GMA/DVB), diamond).
- To evaluate the efficiency of these materials for glycopeptide enrichment from biological digests and serum samples.
- To assess the sensitivity, specificity, and recovery rates of the developed affinity materials.
Main Methods:
- Surface modification of support materials (cellulose, poly(GMA/DVB), diamond) with hydrazide groups.
- Characterization using Scanning Electron Microscopy (SEM) for surface morphology and Fourier-Transform Infrared Spectroscopy (FT-IR) for reaction confirmation.
- Application in affinity chromatography for glycopeptide enrichment from fetuin digest and serum samples.
- Assessment of sensitivity, specificity, and recovery using statistical analysis.
Main Results:
- Poly(GMA/DVB) exhibited high sensitivity (85.7%) and specificity (88.8%) for glycopeptide enrichment, with up to 89% recovery.
- Diamond, while offering hydrophobic interactions, showed reduced sensitivity (69.2%) due to co-elution of non-glycopeptides.
- Cellulose provided good recovery (83%), while diamond's recovery was lower (71%).
- Hydrazide group density correlated with material performance, with cellulose, poly(GMA/DVB), and diamond having 2.8, 2.3, and 2.1 mmol/g, respectively.
- Successful enrichment of characteristic serum glycoproteins was achieved, demonstrating clinical relevance.
Conclusions:
- Economical surface modification routes for support materials were established.
- Hydrazide-functionalized materials, particularly poly(GMA/DVB), offer improved efficiency for glycopeptide enrichment.
- The developed affinity materials show potential for purifying clinically important glycoproteins from serum samples.
