Related Experiment Videos
[Spatial conformation of human serotransferrin glycans]
Comptes Rendus Hebdomadaires Des Seances De L'Academie Des Sciences. Serie D: Sciences Naturelles
|October 9, 1978
Summary
Molecular modeling of human serotransferrin glycans reveals distinct conformations. These structures, a compact core with two antennae, are compatible with their role in molecular recognition.
Area of Science:
- Glycobiology
- Structural Biology
- Computational Chemistry
Context:
- Human serotransferrin is a key iron-transport protein.
- Glycans attached to proteins play crucial roles in biological processes.
- Understanding glycan structure is vital for deciphering their function.
Purpose:
- To construct and analyze molecular models of human serotransferrin glycans.
- To elucidate the conformational properties of these complex carbohydrate structures.
- To assess the structural basis for the proposed recognition function of serotransferrin glycans.
Summary:
- Molecular models of human serotransferrin glycans were built, revealing a pentasaccharide core linked to asparagine (Asn).
- Two distinct trisaccharide antennae, composed of N-acetylneuraminic acid (NANA), galactose (Gal), and N-acetylglucosamine (GlcNAc), are attached to the core.
- Specific sequences exhibit unique conformations: a rigid, flat structure (beta-Man-GlcNAc-GlcNAc) and a helical structure (NANA-Gal-GlcNAc-Man).
- The antennae can adopt either a Y-shaped or T-shaped configuration relative to the core.
- These diverse conformations are consistent with the glycans' role as molecular recognition signals.
Impact:
- Provides detailed insights into the three-dimensional structures of serotransferrin glycans.
- Highlights the conformational flexibility and potential for specific molecular interactions.
- Supports the hypothesis that glycan structure is intrinsically linked to biological recognition functions.