Metabolic Glyco-Engineering in Eukaryotic Cells and Selected Applications

Area of Science:

• Biochemistry
• Cell Biology
• Glycobiology

Background:

• Cellular glycoconjugates are modified using metabolic glyco-engineering through the incorporation of synthetic monosaccharides.
• These unnatural sugars must enter the cytoplasm and be processed into activated forms for enzymatic incorporation into glycans.

Purpose of the Study:

• To evaluate the suitability of novel monosaccharide analogues for metabolic glyco-engineering in tissue culture.
• To utilize glycosylation mutants for assessing the cellular uptake and incorporation of synthetic sugars.

Main Methods:

• Testing monosaccharide analogues in tissue culture, particularly with glycosylation mutants.
• Detecting incorporated unnatural sugars on the cell surface using lectin binding or chemical sugar identification.
• Employing metabolic glyco-engineering to introduce reactive groups for bio-orthogonal click chemistry labeling.

Main Results:

• Glycosylation mutants successfully incorporated unnatural sugars into cell surface glycans when provided with appropriate monosaccharide analogues.
• Lectin labeling and chemical methods quantitatively detected the presence of these modified glycans.
• Metabolic glyco-engineering facilitated the introduction of reactive groups for efficient live-cell glycan labeling via click reactions.

Conclusions:

• Metabolic glyco-engineering is a powerful tool for modifying cellular glycoconjugates with synthetic sugars.
• Tissue culture and glycosylation mutants are effective for testing and validating new monosaccharide analogues.
• The introduction of reactive groups enables versatile and efficient labeling of cell surface glycans.