Resolving the complexity in human milk oligosaccharides using pure shift NMR methods and CASPER

Area of Science:

• * Biochemistry
• * Analytical Chemistry
• * Developmental Biology

Background:

• * Human milk oligosaccharides (HMOs) are bioactive molecules crucial for infant development.
• * Nuclear Magnetic Resonance (NMR) spectroscopy provides essential structural data for HMOs.
• * Signal overlap in ¹H NMR spectra hinders detailed structural analysis of HMOs.

Purpose of the Study:

• * To demonstrate the benefits of pure shift NMR methods for oligosaccharide analysis.
• * To showcase the synergistic effect of combining pure shift NMR with the CASPER computational approach.
• * To improve the determination of structure-function relationships for HMOs.

Main Methods:

• * Application of pure shift NMR techniques to oligosaccharide samples.
• * Utilization of the CASPER computational approach for resonance assignment.
• * Comparative analysis of spectral resolution with and without pure shift methods.

Main Results:

• * Pure shift methods substantially reduce signal overlap in ¹H NMR spectra of oligosaccharides.
• * Improved spectral resolution facilitates more accurate structural elucidation.
• * The combination of pure shift NMR and CASPER enhances the efficiency of resonance assignment.

Conclusions:

• * Pure shift NMR is a powerful tool for overcoming spectral complexity in oligosaccharide analysis.
• * Integrating pure shift NMR with computational methods like CASPER offers a robust strategy for HMO structural studies.
• * This approach facilitates a deeper understanding of HMO bioactivity and its role in infant development.