Kinetic Studies of Acetyl Group Migration between the Saccharide Units in an Oligomannoside Trisaccharide Model Compound and a Native Galactoglucomannan Polysaccharide

Robert Lassfolk, Sara Bertuzzi, Ana Ardá, Johan Wärnå, Jesús Jiménez-Barbero, Reko Leino*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Acyl group migration is a fundamental phenomenon in carbohydrate chemistry, recently shown to take place also between two non-adjacent hydroxyl groups, across the glycosidic bond, in a β-(1→4)-linked mannan trisaccharide model compound. With the central mannoside unit containing acetyl groups at the O2 and O3 positions, the O2-acetyl was in the earlier study shown to migrate to O6 of the reducing end. Potential implications of the general acyl migration process on cell signaling events and plant growth in nature are intriguing open questions. In the present work, migration kinetics in this original trisaccharide model system were studied in more detail together with potential interactions of the model compound and the migration products with DC-SIGN lectin. Furthermore, we demonstrate here for the first time that similar migration may also take place in native polysaccharides, here represented by galactoglucomannan from Norway spruce.

Original languageEnglish
Pages (from-to)2986-2995
Number of pages10
JournalChemBioChem
Volume22
Issue number20
DOIs
Publication statusPublished - 18 Aug 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • acyl migration
  • C-type lectin
  • carbohydrates
  • DC-SIGN
  • galactoglucomannan

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