title: Carbohydrate structures of the glycoprotein allergen Cry j I from Japanese cedar (Cryptomeria japonica) pollen.
abstract: The glycoprotein allergen Cry j I from Japanese cedar (Cryptomeria japonica) pollen was treated with pepsin and glycopeptidase A to release asparagine-linked oligosaccharides. The reducing ends of the oligosaccharides were aminated with the fluorescent reagent 2-aminopyridine. The oligosaccharide derivatives were purified by gel permeation chromatography and reversed-phase HPLC. Their structures were determined by sequential exoglycosidase digestion and 500 MHz 1H-NMR spectroscopy. Four oligosaccharide structures, A, B, C, and D, were identified as the xylose-containing complex-type. They were present at a molar ratio of 8:1:6:1. By amino acid sequence analyses of the tryptic peptides, Asn-170 and Asn-333 of Cry j I were found to carry asparagine-linked oligosaccharides. [formula: see text]
authors.affiliation: Fujisaki Institute, Hayashibara Biochemical Laboratories, Inc., Okayama.
authors.forename: K
authors.initials: K
authors.lastname: Hino
authors.forename: S
authors.initials: S
authors.lastname: Yamamoto
authors.forename: O
authors.initials: O
authors.lastname: Sano
authors.forename: Y
authors.initials: Y
authors.lastname: Taniguchi
authors.forename: K
authors.initials: K
authors.lastname: Kohno
authors.forename: M
authors.initials: M
authors.lastname: Usui
authors.forename: S
authors.initials: S
authors.lastname: Fukuda
authors.forename: H
authors.initials: H
authors.lastname: Hanzawa
authors.forename: H
authors.initials: H
authors.lastname: Haruyama
authors.forename: M
authors.initials: M
authors.lastname: Kurimoto
mesh_terms: D000485:Allergens / Q000737:chemistry*; D000595:Amino Acid Sequence; D052179:Antigens, Plant; D001216:Asparagine; D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D002851:Chromatography, High Pressure Liquid; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D009844:Oligosaccharides / Q000737:chemistry* / Q000302:isolation & purification; D010446:Peptide Fragments / Q000737:chemistry / Q000302:isolation & purification; D010940:Plant Proteins / Q000737:chemistry*; D011058:Pollen / Q000737:chemistry*; D014197:Trees; D014357:Trypsin; D014994:Xylose / Q000032:analysis
chemical_list: D000485:Allergens; D052179:Antigens, Plant; C065290:Cry j I protein, Cryptomeria japonica; D009844:Oligosaccharides; D010446:Peptide Fragments; D010940:Plant Proteins; D001216:Asparagine; D014994:Xylose; D014357:Trypsin