| Literature DB >> 1868856 |
E Staudacher1, F Altmann, J Glössl, L März, H Schachter, J P Kamerling, K Hård, J F Vliegenthart.
Abstract
Incubation of honeybee (Apis mellifica) venom-gland extracts with GDP-[14C]fucose and GlcNAc beta 1----2Man alpha 1----6(GlcNAc beta 1----2Man alpha 1----3)Man beta 1----4GlcNAc beta 1----4(Fuc alpha 1----6)GlcNAc beta 1----N-Asn-peptide(NAc) gave a labeled product in 40% yield. Analysis by 500-MHz 1H-NMR spectroscopy indicated the transferred fucose-(Fuc) residue to be alpha 1----3-linked to the Asn-bound GlcNAc. Further proof was provided by one-dimensional and two-dimensional 1H-NMR analysis of the incubation mixture, after incubation with beta-N-acetylhexosaminidase. The established carbohydrate structure (formula; see text) proves the existence of a novel alpha 1----3-fucosyltransferase with the ability to effect difucosylation of the Asn-bound GlcNAc in N-glycans.Entities:
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Year: 1991 PMID: 1868856 DOI: 10.1111/j.1432-1033.1991.tb16179.x
Source DB: PubMed Journal: Eur J Biochem ISSN: 0014-2956