Versatile N-Methylaminooxy-Functionalized Polypeptides for Preparation of Neoglycoconjugates

Area of Science:

• Bioconjugation Chemistry
• Polymer Science
• Glycobiology

Background:

• Glycoproteins are crucial in biological processes, but their synthesis is complex.
• Developing synthetic glycoprotein mimics is essential for research and therapeutics.
• Existing methods often require complex carbohydrate modifications.

Purpose of the Study:

• To synthesize novel polypeptides with N-methylaminooxy functionality.
• To achieve direct conjugation of these polypeptides with unmodified reducing saccharides.
• To create stable and tunable neoglycopolypeptides as glycoprotein mimics.

Main Methods:

• Synthesis of well-defined polypeptides featuring N-methylaminooxy side chains.
• Direct coupling reactions between functionalized polypeptides and various reducing saccharides in aqueous media.
• Characterization of neoglycopolypeptide properties, including conformation, hydrophobicity, and charge, by varying polypeptide scaffolds.

Main Results:

• High yields of neoglycopolypeptides were achieved through straightforward synthesis.
• Neoglycoconjugates exhibited tunable physicochemical properties based on polypeptide structure.
• The synthesized neoglycopolypeptides demonstrated excellent stability in aqueous conditions (pH 7.4, 37 °C for 1 week).

Conclusions:

• The developed N-methylaminooxy-functionalized polypeptides offer a versatile platform for creating glycoprotein mimics.
• The efficient and direct conjugation method simplifies the synthesis of complex glycoconjugates.
• These stable and tunable neoglycopolypeptides hold promise for applications as degradable glycoprotein mimics in biological research and medicine.