title: Receptors for fucose-binding proteins of Lotus tetragonolobus isolated from mouse embryonal carcinoma cells. Structural characteristics of the poly(N-acetyllactosamine)-type glycan.
abstract: Receptors for fucose-binding proteins of Lotus tetragonolobus were isolated from N4-1 and F9 embryonal carcinoma cells. They were glycoproteins, whose major components had apparent relative molecular masses of more than 100,000. Carbohydrates released from the receptors of N4-1 cells by hydrazinolysis were separated into three fractions by gel filtration. Binding activity to the lectin was detected in the high-molecular-mass fraction. The composition of the large glycan was characteristic of the poly (N-acetyllactosamine)-type, and glucosamine was identified as the sugar involved in the protein-carbohydrate linkage. The glycan has one fucosyl residue per four N-acetyllactosamine units. Most of the fucose was linked to the C-3 hydroxyl group of N-acetylglucosamine. No Fuc alpha 1----2Gal or Fuc alpha 1----4GlcNAc linkage was detected. The glycan had a relative molecular mass of 9000 or more and the poly(N-acetyllactosamine) units were branched. N-Acetylgalactosamine residues were detected in non-reducing ends of at least a part of the glycan. Therefore, the glycan has a more complex structure than the related one from human granulocytes, although both of them have Fuc alpha 1----3GlcNAc termini.
mesh_terms: D000818:Animals; D002236:Carbohydrate Conformation; D037102:Lectins / Q000378:metabolism*; D008745:Methylation; D051379:Mice; D008970:Molecular Weight; D011134:Polysaccharides / Q000032:analysis; D011975:Receptors, Mitogen / Q000032:analysis / Q000302:isolation & purification*; D013724:Teratoma / Q000032:analysis*
chemical_list: D037102:Lectins; D011134:Polysaccharides; D011975:Receptors, Mitogen; C027112:fucose-binding lectin; C037199:poly-N-acetyllactosamine