title: Interaction of wild-type and variant mouse 3T3 cells with lectins from Bandeiraea simplicifolia seeds.
abstract: An isolectin (BS I-B4) derived from Bandeiraea simplicifolia seeds and specific for terminal alpha-D-galactopyranosyl groups was found to be cytotoxic to Swiss 3T3 mouse cells. After mutagenesis and selection with BS I-B4, a variant clonal cell line resistant to both this isolectin and the alpha-D- and beta-D-galactose-binding lectin abrin was isolated. The parental cell line showed homogeneous and noninteracting binding sites for BS I-B4, whereas the variant cells exhibited a curved plot with a reduced number of binding regions. Another lectin, BS II, which is derived from the same seeds by specific for terminal N-acetyl-D-glucosaminyl groups, was cytotoxic to the variant but not the parental cells. These results suggest a possible lesion in the biosynthesis of cell surface structures resulting in the exposure of subterminal N-acetyl-D-glucosaminyl moieties in the variant line.
mesh_terms: D000117:Acetylglucosamine / Q000378:metabolism; D000818:Animals; D001665:Binding Sites; D002448:Cell Adhesion / Q000187:drug effects; D002460:Cell Line; D002462:Cell Membrane / Q000378:metabolism; D002470:Cell Survival / Q000187:drug effects; D005697:Galactosides / Q000378:metabolism*; D006027:Glycosides / Q000378:metabolism*; D037102:Lectins / Q000494:pharmacology; D051379:Mice; D009154:Mutation
chemical_list: D005697:Galactosides; D006027:Glycosides; D037102:Lectins; D000117:Acetylglucosamine