A cation exchange assisted binding-elution (BE) strategy for enzymatic synthesis of human milk oligosaccharides (HMOs) was developed. An amino linker was used to provide the cation ion under acidic condition which can be readily bound to cation exchangeresin and then eluted off by saturated ammonium bicarbonate. Ammonium bicarbonate in the collections was easily removed by vacuum evaporation. This
Avenues to Characterize the Interactions of Extended N‐Glycans with Proteins by NMR Spectroscopy: The Influenza Hemagglutinin Case
作者:Beatriz Fernández de Toro、Wenjie Peng、Andrew J. Thompson、Gema Domínguez、F. Javier Cañada、Javier Pérez‐Castells、James C. Paulson、Jesús Jiménez‐Barbero、Ángeles Canales
DOI:10.1002/anie.201807162
日期:2018.11.12
diffraction or standard NMR methods. Herein, the successful conformational and interaction analysis of a sialylated tetradecasaccharide N‐glycan presenting two LacNAc repetitions at each arm is presented. This glycan has been identified as the receptor of the hemagglutinin protein of pathogenic influenza viruses. To accomplish this study, a N‐glycan conjugated with a lanthanide binding tag has been synthesized
Identification and Role of a 6-Deoxy-4-Keto-Hexosamine in the Lipopolysaccharide Outer Core of<i>Yersinia enterocolitica</i>Serotype O:3
作者:Elise Pinta、Katarzyna A. Duda、Anna Hanuszkiewicz、Zbigniew Kaczyński、Buko Lindner、Wayne L. Miller、Heidi Hyytiäinen、Christian Vogel、Sabine Borowski、Katarzyna Kasperkiewicz、Joseph S. Lam、Joanna Radziejewska-Lebrecht、Mikael Skurnik、Otto Holst
DOI:10.1002/chem.200901255
日期:2009.9.28
The outercore (OC) region of Yersinia enterocolitica serotype O:3lipopolysaccharide is a hexasaccharide essential for the integrity of the outer membrane. It is involved in resistance against cationic antimicrobial peptides and plays a role in virulence during early phases of infection. We show here that the proximal residue of the OC hexasaccharide is a rarely encountered 4‐keto‐hexosamine, 2‐acetamido‐2
Combination of Glycosyltransferases and a Glycosynthase in Sequential and One-Pot Reactions for the Synthesis of Type 1 and Type 2<i>N</i>-Acetyllactosamine Oligomers
Bacillus circulans. Combination of His6BgaC/Glu233Gly and β1,3‐N‐acetylglucosaminyltransferase in sequential or one‐pot mode results in LacNAc type1oligomers with up to four LacNAc units. Moreover, sequential use of all three enzymes gives access to a variety of neo‐LacNAc oligomers. We present oligomers composed of alternating type1 and 2 units and type1‐terminated LacNAc type 2 oligomers. These glycan
Use of the “core-2”-N-acetylglucosaminyltransferase in the chemical-enzymatic synthesis of a sialyl-Lex-containing hexasaccharide found on O-linked glycoproteins
作者:Reinhold Oehrlein、Ole Hindsgaul、Monica M. Palcic
DOI:10.1016/0008-6215(93)80011-3
日期:1993.5
obtained in a single step of affinity chromatography is suitable for use in preparative oligosaccharide synthesis. In conjunction with previously described preparations of beta-(1-->4)-galactosyltransferase (EC 2.4.1.22), alpha-(2-->3)-sialytransferase (EC 2.4.99.6) and alpha-(1-->3/4)-fucosyltransferase (EC 2.4.1.65), the GlcNAcT was used in the first step of a sequence which converted the disaccharide