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A Simple Approach to Well‐Defined Sugar‐Coated Surfaces for Interaction Studies
Author(s) -
VilaPerelló Miquel,
Gutiérrez Gallego Ricardo,
Andreu David
Publication year - 2005
Publication title -
chembiochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.05
H-Index - 126
eISSN - 1439-7633
pISSN - 1439-4227
DOI - 10.1002/cbic.200500125
Subject(s) - glycan , lectin , surface plasmon resonance , chemistry , wheat germ agglutinin , combinatorial chemistry , nanotechnology , peptide , biological system , glycoprotein , materials science , biochemistry , biology , nanoparticle
Protein–carbohydrate interactions play a crucial role in many relevant biological processes, and the development of simple and reliable tools for their study is a well‐recognized need. Surface‐based methods are particularly attractive because they i ) can effectively mimic cell‐surface recognition events, ii ) allow the identification of low‐affinity binders, iii ) are easily adaptable to high‐throughput screening, and iv ) require minimal sample amounts. We describe here the design and synthesis of a peptide module that efficiently captures glycans through its reducing end, by oxime ligation. Immobilization to carboxyl‐functionalized supports was thereby made possible. Chemically well‐defined surfaces coated with selected glycan targets were generated by this approach for surface plasmon resonance (SPR) studies. The usefulness of the method was demonstrated in the analysis of interactions that covered a five‐orders‐of‐magnitude affinity range; namely, the strong binding ( K A ∼10 9 M −1 ) of a well‐known lectin (wheat germ agglutinin) to chitopentose (GlcNAc 5 ), and that of the same sugar with a weak binder ( K A ∼10 4 M −1 ), HEV32—the smallest hevein domain described.