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Specific hemoglobin (poly)saccharide recognition
1Department of Chemistry-Biochemistry, Université du Québec à Montréal, Canada.
Journal of Molecular Recognition : JMR
|January 1, 1995
Summary
Hemoglobin exhibits specific sugar interactions, binding preferentially to certain carbohydrates like galactose. This suggests a distinct recognition site on hemoglobin for sugars, influencing its glycosylation.
Area of Science:
- Biochemistry
- Glycobiology
Background:
- Hemoglobin (Hb) undergoes non-enzymatic glycosylation.
- Kinetic studies suggest a specific sugar recognition center on Hb's beta-chain.
Purpose of the Study:
- To investigate the hypothesis of a hemoglobin sugar recognition center.
- To identify specific carbohydrate interactions with hemoglobin using affinity chromatography.
Main Methods:
- Affinity chromatography using epichlorohydrin-crosslinked amylose, agarose, and Sephadex.
- Competitive elution studies with various monosaccharides and disaccharides.
Main Results:
- Hemoglobin showed specific retention on CL-amylose and agarose.
- Elution occurred primarily with galactose and lactose, indicating a preference for galactose-containing sugars.
- No significant retention was observed with Sephadex (alpha-1,6-glycosidic links).
Conclusions:
- Hemoglobin demonstrates selective recognition of specific carbohydrate structures.
- Data supports the existence of a hemoglobin recognition center for sugars, particularly those containing galactose.