Journal
GLYCOCONJUGATE JOURNAL
Volume 25, Issue 4, Pages 313-321Publisher
SPRINGER
DOI: 10.1007/s10719-007-9076-6
Keywords
lectins; surface plasmon resonance; isothermal titration calorimetry; sugar ligands; electron microscopy; dynamic light scattering
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A kinetic study of the interaction of bivalent and monovalent sugar ligands with a lectin was undertaken with the aid of surface plasmon resonance (SPR) method. The study involved a series of bivalent alpha-D-mannopyranoside containing sugar ligands, with systematic variation in the distance between the sugar ligands. The detailed kinetic studies showed that bivalent ligands underwent a faster association (k(on)) and a slower dissociation (k(off)) of the ligand-lectin complexes, in comparison to the monovalent ligand-lectin complexes. The kinetic constants were complemented further by assessing the thermodynamic parameters with the aid of isothermal titration calorimetry (ITC). The initiation of cross-linking of ligand-lectin interactions emerge from the early stages of the complexation. The dynamic light scattering (DLS) and the transmission electron microscopy (TEM) techniques allowed judging the sizes and morphologies of the complex in the solution and solid states, respectively.
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