title: Novel oligosaccharide constituents of the cellulase complex of Bacteroides cellulosolvens.
abstract: The multiple cellulase-containing protein complex, isolated from the cellulolytic bacterium Bacteroides cellulosolvens, contains oligosaccharides which are O-linked mainly to a 230-kDa subunit. The oligosaccharide chains were liberated by alkaline-borohydride treatment and fractionated as oligosaccharide alditols via gel-permeation chromatography and HPLC. The fractions were investigated by one- and two-dimensional (correlation, homonuclear Hartmann-Hahn, rotating-frame nuclear Overhauser enhancement) 500-MHz 1H-NMR spectroscopy in combination with monosaccharide and methylation analyses and with fast-atom-bombardment mass spectrometry. The following carbohydrate structures could be established: [formula: see text] The results indicate an interesting similarity between the oligosaccharide moieties of the cellulase complex of B. cellulosolvens and of Clostridium thermocellum [Gerwig, G. J., Kamerling, J. P., Vliegenthart, J. F. G., Morag (Morgenstern), E., Lamed, R. & Bayer, E. A. (1991) Eur. J. Biochem. 196, 115-122], having 3, 5 and 6 as common elements. The furanose form of a terminal alpha-D-galactose residue demonstrated an inhibitory effect on the interaction of Griffonia simplicifolia I isolectin B4 with the cellulosome-like entity of B. cellulosolvens.
authors.affiliation: Bijvoet Center, Department of Bio-Organic Chemistry, Utrecht University, The Netherlands.
authors.forename: G J
authors.initials: GJ
authors.lastname: Gerwig
authors.forename: J P
authors.initials: JP
authors.lastname: Kamerling
authors.forename: J F
authors.initials: JF
authors.lastname: Vliegenthart
authors.forename: E
authors.initials: E
authors.lastname: Morag
authors.forename: R
authors.initials: R
authors.lastname: Lamed
authors.forename: E A
authors.initials: EA
authors.lastname: Bayer
mesh_terms: D000581:Amidohydrolases; D001439:Bacteroides / Q000201:enzymology*; D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D002480:Cellulase / Q000737:chemistry* / Q000302:isolation & purification; D002851:Chromatography, High Pressure Liquid; D006023:Glycoproteins / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D009097:Multienzyme Complexes / Q000737:chemistry* / Q000302:isolation & purification; D009844:Oligosaccharides / Q000737:chemistry* / Q000302:isolation & purification; D043524:Peptide-N4-(N-acetyl-beta-glucosaminyl) Asparagine Amidase
chemical_list: D006023:Glycoproteins; D009097:Multienzyme Complexes; D009844:Oligosaccharides; D002480:Cellulase; D000581:Amidohydrolases; D043524:Peptide-N4-(N-acetyl-beta-glucosaminyl) Asparagine Amidase