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A Lectin HPLC Method to Enrich Selectively-glycosylated Peptides from Complex Biological Samples
Published on: October 2, 2009
An antibody-lectin sandwich assay for quantifying protein glycoforms
1School of Biology and Biochemistry, Queen's University, Belfast, UK-Northern Ireland.
Insights
Quantify protein glycoforms using a novel antibody-lectin sandwich assay. This method captures proteins with antibodies and identifies specific glycoforms using labeled lectins for accurate measurement.
Area of Science:
- Biochemistry
- Analytical Chemistry
- Immunology
Background:
- Glycoforms, or variations in protein glycosylation, significantly impact protein function and are crucial biomarkers.
- Accurate quantitation of specific glycoforms is essential for understanding disease mechanisms and developing targeted therapies.
- Existing methods for glycoform analysis can be complex and may lack specificity.
Purpose of the Study:
- To develop and validate a novel antibody-lectin sandwich assay for the precise quantitation of protein glycoforms.
- To establish a versatile platform adaptable for analyzing diverse protein glycoforms.
Main Methods:
- The assay utilizes a deglycosylated IgG antibody immobilized on a microtiter plate to capture target proteins.
- Specific glycoforms are identified through reaction with biotin-labeled lectins.
- Detection is achieved using a streptavidin/alkaline phosphatase system.
Main Results:
- The antibody-lectin sandwich assay enables accurate quantitation of protein glycoforms.
- The assay demonstrates adaptability for various proteins by altering the specific antibody and lectin used.
Conclusions:
- The developed assay provides a sensitive and specific method for glycoform quantitation.
- This adaptable assay platform has broad applications in biochemical research and diagnostics.
Abstract:
We describe an antibody-lectin sandwich assay for quantitation of glycoforms of proteins. The assay uses deglycosylated IgG antibody immobilized on a microtiter plate to capture the protein of interest from the sample. The particular glycoform is then identified by reaction with biotin-labeled lectin, which is measured using streptavidin/alkaline phosphatase. The assay can be adapted to quantitate any protein's glycoforms by simply substituting the antibody and lectin with specific alternatives.
