glycoengineering
Glycoengineering
Overview
Glycosylation is the most common and complex post-translational modification (PTM) of proteins, affecting over 50% of all human proteins. Glycans regulate protein folding, stability, immune recognition, receptor interactions, and pharmacokinetics of therapeutic proteins. Glycoengineering involves rational modification of glycosylation patterns for improved therapeutic efficacy, stability, or immune evasion.
Two major glycosylation types:
- N-glycosylation: Attached to asparagine (N) in the sequon N-X-[S/T] where X ≠ Proline; occurs in the ER/Golgi
- O-glycosylation: Attached to serine (S) or threonine (T); no strict consensus motif; primarily GalNAc initiation
When to Use This Skill
Use this skill when:
- Antibody engineering: Optimize Fc glycosylation for enhanced ADCC, CDC, or reduced immunogenicity
- Therapeutic protein design: Identify glycosylation sites that affect half-life, stability, or immunogenicity
- Vaccine antigen design: Engineer glycan shields to focus immune responses on conserved epitopes
- Biosimilar characterization: Compare glycan patterns between reference and biosimilar
- Drug target analysis: Does glycosylation affect target engagement for a receptor?
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