Volume 58, Issue 31 pp. 10547-10552
Communication

Protecting-Group-Controlled Enzymatic Glycosylation of Oligo-N-Acetyllactosamine Derivatives

Ivan A. Gagarinov

Ivan A. Gagarinov

Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Bijvoet Center for Biomolecular Research, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands

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Dr. Tiehai Li

Dr. Tiehai Li

Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, GA, 30602 USA

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Na Wei

Na Wei

Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, GA, 30602 USA

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Javier Sastre Toraño

Javier Sastre Toraño

Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Bijvoet Center for Biomolecular Research, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands

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Dr. Robert P. de Vries

Dr. Robert P. de Vries

Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Bijvoet Center for Biomolecular Research, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands

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Dr. Margreet A. Wolfert

Dr. Margreet A. Wolfert

Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Bijvoet Center for Biomolecular Research, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands

Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, GA, 30602 USA

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Prof. Geert-Jan Boons

Corresponding Author

Prof. Geert-Jan Boons

Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Bijvoet Center for Biomolecular Research, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands

Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, GA, 30602 USA

Department of Chemistry, University of Georgia, Athens, GA, USA

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First published: 20 May 2019
Citations: 34

Graphical Abstract

A library of differentially fucosylated and sialylated oligosaccharides was produced starting from a single chemically synthesized tri-N-acetyllactosamine derivative. The resulting oligosaccharides were printed as a microarray that was probed by several glycan-binding proteins, which showed that complex patterns of fucosylation can modulate glycan recognition.

Abstract

We describe a chemoenzymatic strategy that can give a library of differentially fucosylated and sialylated oligosaccharides starting from a single chemically synthesized tri-N-acetyllactosamine derivative. The common precursor could easily be converted into 6 different hexasaccharides in which the glucosamine moieties are either acetylated (GlcNAc) or modified as a free amine (GlcNH2) or Boc (GlcNHBoc). Fucosylation of the resulting compounds by a recombinant fucosyl transferase resulted in only modification of the natural GlcNAc moieties, providing access to 6 selectively mono- and bis-fucosylated oligosaccharides. Conversion of the GlcNH2 or GlcNHBoc moieties into the natural GlcNAc, followed by sialylation by sialyl transferases gave 12 differently fucosylated and sialylated compounds. The oligosaccharides were printed as a microarray that was probed by several glycan-binding proteins, demonstrating that complex patterns of fucosylation can modulate glycan recognition.

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