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Exploring Protein-Glycan Interactions: Advances in Nuclear Magnetic Resonance
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Exploring Protein-Glycan Interactions: Advances in Nuclear Magnetic Resonance.

Fabio C L Almeida1, Francisco Felipe Bezerra2, Ariana A Vasconcelos3

  • 1Institute of Medical Biochemistry Leopoldo de Meis (IBqM), Federal University of Rio de Janeiro (UFRJ); National Center for Structural Biology and Bioimaging (CENABIO), Federal University of Rio de Janeiro (UFRJ).

Journal of Visualized Experiments : Jove
|September 15, 2025
PubMed
Summary
This summary is machine-generated.

This study introduces a new Nuclear Magnetic Resonance (NMR) method to study weak protein-glycan interactions. This technique enhances the detection of transient molecular binding events crucial for biological processes.

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Area of Science:

  • Biochemistry and Molecular Biology
  • Structural Biology
  • Chemical Biology

Background:

  • Protein-glycan interactions are vital in biological processes and disease.
  • Characterizing weak and transient interactions remains a significant challenge.
  • Nuclear Magnetic Resonance (NMR) spectroscopy offers atomic-resolution insights into molecular interactions.

Purpose of the Study:

  • To develop and present an integrated NMR protocol for investigating low-affinity protein-glycan interactions.
  • To utilize a model system of cyanovirin-N and D-mannose to demonstrate the protocol's efficacy.
  • To map binding sites and detect subtle binding events, including allosteric effects.

Main Methods:

  • An integrated NMR protocol combining ligand- and protein-based approaches.
  • Detailed sample preparation, concentration control, and spectral standardization for reproducibility.
  • Solution-state NMR to detect transient interactions often missed by other methods.

Main Results:

  • The protocol successfully investigated low-affinity interactions between cyanovirin-N and D-mannose.
  • Comprehensive binding site mapping and detection of subtle binding events were achieved.
  • Demonstrated NMR's capability to study transient interactions relevant to biological functions.

Conclusions:

  • The developed NMR protocol is a powerful tool for studying weak protein-glycan interactions.
  • This method can reveal insights into molecular recognition relevant to signal transduction and cell communication.
  • It holds potential for identifying novel diagnostic markers based on glycan-specific binding.