Weak Self-association in a Carbohydrate System
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The physiological importance of weak interactions between biological macromolecules (molar dissociation constants >10 microM) is now well recognized, particularly with regard to cell adhesion and immunological phenomena, and many weak interactions have been measured for proteins. The concomitant importance of carbohydrate-carbohydrate interactions has also been identified, although no weak interaction between pure carbohydrate systems has ever been measured. We now demonstrate for the first time to our knowledge using a powerful probe for weak interactions--sedimentation velocity in the analytical ultracentrifuge--that at least some carbohydrates (from the class of polysaccharides known as heteroxylans and demonstrated here to be biologically active) can show well-defined weak self-interactions of the "monomer-dimer" type frequently found in protein systems. The weak interaction between the heteroxylans is shown from a temperature dependence study to be likely to be hydrophobic in nature.
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Rickert J, Held M, Engelhardt J, Hell S Proc Natl Acad Sci U S A. 2024; 121(11):e2318870121.
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Harding S Biophys Rev. 2022; 14(3):605-610.
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Misevic G, Garbarino E Molecules. 2021; 26(2).
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Measuring Ultra-Weak Protein Self-Association by Non-ideal Sedimentation Velocity.
Chaturvedi S, Sagar V, Zhao H, Wistow G, Schuck P J Am Chem Soc. 2019; 141(7):2990-2996.
PMID: 30668114 PMC: 6385077. DOI: 10.1021/jacs.8b11371.