Synthesis of glycoconjugates utilizing the regioselectivity of a lytic polysaccharide monooxygenase

Sci Rep. 2020 Aug 6;10(1):13197. doi: 10.1038/s41598-020-69951-7.

Abstract

Polysaccharides from plant biomass are the most abundant renewable chemicals on Earth and can potentially be converted to a wide variety of useful glycoconjugates. Potential applications of glycoconjugates include therapeutics and drug delivery, vaccine development and as fine chemicals. While anomeric hydroxyl groups of carbohydrates are amenable to a variety of useful chemical modifications, selective cross-coupling to non-reducing ends has remained challenging. Several lytic polysaccharide monooxygenases (LPMOs), powerful enzymes known for their application in cellulose degradation, specifically oxidize non-reducing ends, introducing carbonyl groups that can be utilized for chemical coupling. This study provides a simple and highly specific approach to produce oxime-based glycoconjugates from LPMO-functionalized oligosaccharides. The products are evaluated by HPLC, mass spectrometry and NMR. Furthermore, we demonstrate potential biodegradability of these glycoconjugates using selective enzymes.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Carbohydrate Sequence
  • Chemistry Techniques, Synthetic
  • Glycoconjugates / chemical synthesis*
  • Glycoconjugates / chemistry*
  • Mixed Function Oxygenases / metabolism*
  • Polysaccharides / metabolism*
  • Stereoisomerism
  • Substrate Specificity

Substances

  • Glycoconjugates
  • Polysaccharides
  • Mixed Function Oxygenases