Derivatization of Free Natural Glycans for Incorporation onto Glycan Arrays: Derivatizing Glycans on the Microscale for Microarr
- Abstract
- Table of Contents
- Materials
- Figures
- Literature Cited
Abstract
Nature possesses an unlimited number and source of biologically relevant natural glycans, many of which are too complicated to synthesize in the laboratory. To capitalize on the naturally occurring plethora of glycans, a method is presented here to fluorescently tag isolated free glycans while maintaining the closed?ring structure. After purification of the labeled glycans, they can be printed on a glass surface to create a natural glycan microarray, suitable for interrogation with potential glycan?binding proteins. The derivatization of these natural glycans has vastly expanded the number of glycans available for functional studies. Curr. Protoc. Chem. Biol. 3:53?63 © 2011 by John Wiley & Sons, Inc.
Keywords: fluorescence; reductive amination; glycan microarray; conjugation
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- Introduction
- Basic Protocol 1: Preparation of Closed‐Ring Glycan‐AEAB from Free Reducing Glycans
- Alternate Protocol 1: Preparation of AEAB Conjugates Using Commercial Chemicals
- Commentary
- Literature Cited
- Figures
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Basic Protocol 1: Preparation of Closed‐Ring Glycan‐AEAB from Free Reducing Glycans Materials
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Figure 1. The closed‐ring fluorescent conjugation of reducing glycans. -
Figure 2. The preparation of AEAB conjugates or fluorescent neoglycoproteins by the reaction of PNPA derivatives with ethylenediamine or proteins, respectively. -
Figure 3. Comparison of the binding of four different antibodies to open‐ring and closed‐ring AEAB conjugates on a glycan array. The arrays were printed using a piezo printer (Perkin‐Elmer) with open‐ and closed‐ring AEAB derivatives at 300 µM on NHS‐derivatized slides. Antibodies were applied to the glycan array at the concentrations indicated in the figure, and detected with appropriate fluorescently labeled secondary antibodies (Song et al., ). The x axis represents different glycans on the array by number, and the y axis represents the relative fluorescence units (RFU) detected on the microarray.
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Literature Cited
Literature Cited | |
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