Abstract
The rare N-unsubstituted glucosamine (GlcNH3 +) residues in heparan sulfate (HS) have important biological and pathophysiological roles. Therefore, the ability to chemically generate a series of oligosaccharides, which have a similar structure to the naturally-occurring, GlcNH3 + - containing oligosaccharides from HS, would greatly contribute to investigating their natural role in HS. In this study, a hexasaccharide library that possess GlcNH3 + residues were prepared from the chemical modification of the fully sulfated dp6. Chemical reaction conditions were optimized to generate different pattern of GlcNH3 + - containing oligosaccharides, then the structure of the library was detected by high-performance liquid chromatography-ion trap/time-of-flight mass spectrometry (LC/MS-ITTOF) analysis. EIC/MS and MS2 analysis showed different fragmentation patterns of dp6s with different GlcNH3 + residues. This provides a foundation for further identification and quantification of GlcNH3 + - oligosaccharides by mass spectrum analysis.
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Abbreviations
- CyPB:
-
Cyclophilin-B
- DMSO:
-
Dimethyl sulfoxide
- dp:
-
Degree of polymerization (corresponds to the number of monosaccharide units, i.e. dp2 is a disaccharide)
- EIC:
-
Extracted ion chromatography
- GAGs:
-
Glycosaminoglycans
- GlcA:
-
β-D-glucuronic acid
- GlcNAc:
-
β-D-N-acetylglucosamine
- GlcNH3 + :
-
β-D-N-unsubstituted glucosamine
- GlcNS:
-
β-D-N-sulfoglucosamine
- HS 3-OST:
-
Heparan sulfate 3-O-sulfotransferases
- HS:
-
Heparan sulfate
- HSV:
-
Herpes simplex virus
- IdoA:
-
α-L-iduronic acid
- IPRP-LC-ITTOF:
-
Ion-pair reversed-phase liquid chromatography-ion trap/time-of-flight mass spectrometry
- LMWH:
-
Low molecular weight heparin
- NDST:
-
N-deacetylase/N-sulfotransferase
- PTA:
-
n-pentylamine
- RT:
-
Retention time
- SAX-HPLC:
-
Strong anion-exchange HPLC
- SE-HPLC:
-
Size-exclusion HPLC
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Acknowledgments
This work was supported by Grants 20773023 and 21343013 from National Natural Science Foundation of China.
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Liang, Q.T., Du, J.Y., Fu, Q. et al. Preparation and characterization of heparin hexasaccharide library with N-unsubstituted glucosamine residues. Glycoconj J 32, 643–653 (2015). https://doi.org/10.1007/s10719-015-9612-8
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DOI: https://doi.org/10.1007/s10719-015-9612-8