Among other functions, lectins play an important role in the innate immune response of vertebrates and invertebrates by recognizing exposed glycans on the surface of potential pathogens. Despite the typically weak interaction of lectin domains with their carbohydrate ligands, they usually achieve high avidity through oligomeric structures or by the presence of tandem carbohydratebinding domains along the polypeptide. The recently described structure of the fucose-binding European eel agglutinin revealed a novel lectin fold (the “F-type ” fold), which is shared with other carbohydrate-binding proteins and apparently unrelated proteins from prokaryotes to vertebrates, and a unique fucose-binding sequence motif. Here we described the biochemical and molecular characterization of a unique fucose-binding lectin (MsaFBP32) isolated from serum of the striped bass (Morone saxatilis), composed of two tandem domains that exhibit the eel carbohydrate recognitio
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