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Updated: Aug 11, 2025

Author Spotlight: Unveiling the Structural and Dynamic Aspects of Glycan Molecular Recognition

Author Spotlight: Unveiling the Structural and Dynamic Aspects of Glycan Molecular Recognition

Published on: May 17, 2024

Exploring multivalent carbohydrate-protein interactions by NMR.

Jon I Quintana¹, Unai Atxabal¹, Luca Unione^1,2

¹CICbioGUNE, Basque Research & Technology Alliance (BRTA), Bizkaia Technology Park, Building 800, 48160 Derio, Bizkaia, Spain. aarda@cicbiogune.es.

Chemical Society Reviews

|February 8, 2023

Summary

This summary is machine-generated.

Nuclear Magnetic Resonance (NMR) can study glycan-protein interactions, but challenges arise with multivalency. This review explores overcoming NMR limitations for analyzing these complex molecular recognition events.

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Area of Science:

Carbohydrate Chemistry
Structural Biology
Biophysical Chemistry

Background:

Nuclear Magnetic Resonance (NMR) is a powerful technique for analyzing molecular recognition events, including glycan-protein interactions.
NMR provides insights into affinity, structure, kinetics, conformation, and dynamics of binding processes.
Lectin-sugar interactions often exhibit weak affinity, which is compensated by multivalency in biological systems.

Purpose of the Study:

To review the challenges and strategies for applying NMR methods to study multivalent lectin-glycan interactions.
To discuss how multivalency, whether on the glycan or lectin side, influences binding events.
To highlight the complexities introduced by large macromolecular complexes in NMR analysis.

Main Methods:

Review of existing literature on NMR applications in glycan-protein recognition.
Analysis of factors affecting NMR signal detection in multivalent systems, such as fast transverse relaxation and chemical exchange.
Categorization of multivalent presentations in glycans (e.g., poly-LacNAc, multiantennae N-glycans, dendrimers) and lectins (multimeric structures).

Main Results:

Multivalent presentations can significantly enhance binding affinity but pose challenges for NMR monitoring due to signal broadening and loss.
Understanding the timescale of free-bound chemical exchange is crucial for interpreting NMR data in multivalent interactions.
Both glycan architecture (linear vs. scaffolded) and lectin quaternary structure impact the complexity of observed binding phenomena.

Conclusions:

Overcoming NMR limitations is essential for a comprehensive understanding of multivalent lectin-glycan recognition.
NMR can be adapted to study these complex interactions by considering factors like size, exchange, and multivalency presentation.
This review provides a framework for future NMR studies on intricate carbohydrate-binding protein systems.