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  • Title: Carbohydrate binding properties of the stinging nettle (Urtica dioica) rhizome lectin.
    Author: Shibuya N, Goldstein IJ, Shafer JA, Peumans WJ, Broekaert WF.
    Journal: Arch Biochem Biophys; 1986 Aug 15; 249(1):215-24. PubMed ID: 3740853.
    Abstract:
    The interaction of the stinging nettle rhizome lectin (UDA) with carbohydrates was studied by using the techniques of quantitative precipitation, hapten inhibition, equilibrium dialysis, and uv difference spectroscopy. The Carbohydrate binding site of UDA was determined to be complementary to an N,N',N"-triacetylchitotriose unit and proposed to consist of three subsites, each of which has a slightly different binding specificity. UDA also has a hydrophobic interacting region adjacent to the carbohydrate binding site. Equilibrium dialysis and uv difference spectroscopy revealed that UDA has two carbohydrate binding sites per molecule consisting of a single polypeptide chain. These binding sites either have intrinsically different affinities for ligand molecules, or they may display negative cooperativity toward ligand binding.
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