title: Bandeiraea (Griffonia) simplicifolia lectin-I, isolectin A4, reacting with Tn (Ga1NAc alpha1 --> Ser/Thr) or galabiose (Ga1 alpha1 --> 4Ga1) containing ligands.
abstract: Bandeiraea (Griffonia) simplicifolia lectin-I, isolectin A4(GS I-A4) reacting with the Tn(GalNAc alpha1 --> Ser/Thr) sequence or human blood group Pk active disaccharide (E, Gal alpha1 --> 4Gal, galabiose) was studied by quantitative precipitin (QPA) and precipitin-inhibition assays. When human blood group P1 or Tn active glycoproteins were tested by QPA, GS I-A4 reacted strongly with both the Tn active glycoproteins purified from asialo porcine, ovine and armadillo submandibular glands and a P1 active glycoprotein isolated from sheep hydatid fluid. They precipitated over 80% of the lectin nitrogen added. The asialo porcine salivary glycoprotein-GS I-A4 interaction was inhibited by both Tn containing glycopeptides and Gal alpha1 --> 4Gal indicating that GS I-A4 not only reacts with human blood group A(GalNAc alpha1 --> 3Gal) and B(Gal alpha1 --> 3Gal) active disaccharides, but also recognizes the Tn sequence and the E(Gal alpha1 --> 4-Gal) ligand. From these results, the carbohydrate specificity of GS I-A4 can be defined as A, Tn > or = B and E.
authors.affiliation: Glyco-Immunochemistry Research Laboratory, Institute of Molecular and Cellular Biology, Chang-Gung Medical College, Kwei-san, Tao-yuan, Taiwan.
authors.forename: A M
authors.initials: AM
authors.lastname: Wu
authors.forename: J H
authors.initials: JH
authors.lastname: Wu
authors.forename: S C
authors.initials: SC
authors.lastname: Song
authors.forename: E A
authors.initials: EA
authors.lastname: Kabat
mesh_terms: D000017:ABO Blood-Group System / Q000378:metabolism; D000818:Animals; D015295:Antigens, Tumor-Associated, Carbohydrate / Q000737:chemistry / Q000378:metabolism*; D001135:Armadillos; D002240:Carbohydrate Sequence; D004187:Disaccharides / Q000737:chemistry / Q000378:metabolism*; D006023:Glycoproteins / Q000737:chemistry / Q000378:metabolism; D006801:Humans; D037102:Lectins / Q000737:chemistry / Q000378:metabolism*; D008024:Ligands; D008969:Molecular Sequence Data; D037121:Plant Lectins; D011233:Precipitin Tests; D012756:Sheep
chemical_list: D000017:ABO Blood-Group System; D015295:Antigens, Tumor-Associated, Carbohydrate; D004187:Disaccharides; D006023:Glycoproteins; C045475:Griffonia simplicifolia lectins; D037102:Lectins; D008024:Ligands; D037121:Plant Lectins; C040286:Tn antigen; C032103:4-O-alpha-D-galactopyranosyl-D-galactose