title: N-linked sugar chain of 55-kDa royal jelly glycoprotein.
abstract: An N-linked sugar chain from 55-kDa royal jelly glycoprotein (RJGP), which maintains the high viability of rat liver primary cultured cell and is a different molecular species from 350-kDa RJGP [Kimura et al., Biosci. Biotech. Biochem., 59, 507-509 (1995)], has been identified. The sugar chains were released by hydrazinolysis followed by N-acetylation and pyridylamination. The structural analysis of the pyridylaminated sugar chain was done by a combination of sequential exo-mannosidase digestions, MALDI-TOF MS, and 500 MHz 1H-NMR. For the carbohydrate moiety of 55-kDa RJGP, only one N-linked sugar chain has been detected. The structure has been found to be Man alpha 1-->2Man alpha 1-->6(Man alpha 1--> 2Man alpha 1-->3)Man alpha 1-->6(Man alpha 1-->2Man alpha 1-->2Man alpha 1-->3)Man beta 1-->4GlcNAc beta 1-->4GlcNAc, which is a non-processed high mannose type structure.
authors.affiliation: Department of Bioresources Chemistry, Faculty of Agriculture, Okayama University, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Kimura
authors.forename: S
authors.initials: S
authors.lastname: Kajiyama
authors.forename: J
authors.initials: J
authors.lastname: Kanaeda
authors.forename: T
authors.initials: T
authors.lastname: Izukawa
authors.forename: M
authors.initials: M
authors.lastname: Yonekura
mesh_terms: D000818:Animals; D001516:Bees / Q000378:metabolism*; D002240:Carbohydrate Sequence; D002851:Chromatography, High Pressure Liquid; D005227:Fatty Acids / Q000737:chemistry*; D006023:Glycoproteins / Q000737:chemistry* / Q000302:isolation & purification; D007301:Insect Hormones / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D000099219:Royal Jelly
chemical_list: D005227:Fatty Acids; D006023:Glycoproteins; D007301:Insect Hormones; D000099219:Royal Jelly