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  • Title: Characterization of keyhole limpet hemocyanin (KLH) glycans sharing a carbohydrate epitope with Schistosoma mansoni glycoconjugates.
    Author: Geyer H, Wuhrer M, Kurokawa T, Geyer R.
    Journal: Micron; 2004; 35(1-2):105-6. PubMed ID: 15036307.
    Abstract:
    Keyhole limpet hemocyanin (KLH) is known to share carbohydrate epitopes with Schistosoma mansoni. In order to define the structural basis for the observed serological cross-reactivity, KLH glycans were released either by enzyme treatment or by hydrazinolysis and probed with a rabbit hyperimmune serum directed against S. mansoni egg antigen. Both major, non-reacting oligosaccharide species as well as the minor compounds recognized were isolated by two-dimensional high performance liquid chromatography and in part by lectin affinity chromatography, and characterized by mass spectrometry. The results revealed that KLH carries predominantly high mannose-type glycans as well as short sugar chains. As a characteristic feature, a number of the latter glycans contained a Gal(beta1-6)Man-unit, which has not yet been found in glycoprotein-N-glycans. Oligosaccharides cross-reacting with schistosomal glycans comprised a terminal Fuc(alpha1-3)GalNAc-motif, which appears to represent the main carbohydrate epitope mediating cross-reactivity of KLH with glycoconjugates from S. mansoni.
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