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Accueil > Publications > Recherche par années > Années 1990 > 1992

Lhernould, S ; Karamanos, Y ; Bourgerie, S ; Strecker, G ; Julien, R ; Morvan, H

Peptide-n(4)-(n-acetylglucosaminyl)asparagine amidase (pngase) activity could explain the occurrence of extracellular xylomannosides in a plant-cell suspension

Glycoconjugate Journal 9 (4) 191-197

par Administrateur - publié le , mis à jour le

Abstract :

We have previously isolated mannoside and xylomannoside oligosaccharides with one or two terminal reducing N-acetylglucosamine residues from the extracellular medium of white campion (Silene alba) suspension culture. We have now demonstrated the presence of peptide-N4-(N-acetylglucosaminyl)asparagine amidase (PNGase) activity in cell extracts as well in the culture medium that could explain the production of those compounds. An additional xylomannoside, (GlcNAc)Man3(Xyl)GlcNAc(Fuc)GlcNAc, was characterized, and H-1- and C-13-NMR assignments for the oligosaccharide Man3(Xyl)GlcNAc(Fuc)GlcNAc were obtained using homonuclear and heteronuclear spectroscopy (COSY).