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  • Title: The structure of the oligosaccharides of alpha3beta1 integrin from human ureter epithelium (HCV29) cell line.
    Author: Lityńska A, Pocheć E, Hoja-Lukowicz D, Kremser E, Laidler P, Amoresano A, Monti C.
    Journal: Acta Biochim Pol; 2002; 49(2):491-500. PubMed ID: 12362991.
    Abstract:
    There is a growing line of evidence that glycosylation of alpha and beta subunits is important for the function of integrins. Integrin alpha3beta1, from human ureter epithelium cell-line HCV29, was isolated by affinity chromatography on laminin GD6 peptide. Characterization of its carbohydrate moieties was carried out using sodium dodecyl sulfate/polyacrylamide gel electrophoresis followed by Western blotting on Immobilon P and on-blot deglycosylation with peptide N-glycosidase-F. Profiles of N-glycans for each subunit were obtained by matrix-assisted laser desorption/ionization mass spectrometry. Our findings demonstrated, in both subunits of integrin alpha3beta1, the presence of complex type oligosaccharides with a wide heterogeneity. Bi- tri- and tetraantennary structures were the most common, while high-mannose type structures were minor. Also the presence of short poly-N-acetyllactosamine entities was shown. These results show that while the predominant oligosaccharides of both subunits are identical, some slight differences between them do exist.
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