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Updated: May 22, 2026

Computational Prediction of Amino Acid Preferences of Potentially Multispecific Peptide-Binding Domains Involved in Protein-Protein Interactions
Published on: January 26, 2024
The conformational locking of asparagine
Carlos Cabezas1, Marcelino Varela, Isabel Peña
1Grupo de Espectroscopía Molecular, Edificio Quifima, Área de Química-Física, Laboratorios de Espectroscopia y Bioespectroscopia, Parque Científico UVa, Universidad de Valladolid, 47005 Valladolid, Spain.
Asparagine exhibits a single dominant structure, unlike other amino acids. This conformational stability is due to intramolecular hydrogen bonding involving amine, carboxylic, and amide groups.
Area of Science:
- Molecular spectroscopy
- Structural chemistry
- Biophysics
Background:
- Amino acids typically display multiple stable conformations in the gas phase.
- Understanding amino acid structure is crucial for protein folding and function.
Purpose of the Study:
- To investigate the conformational behavior of asparagine using rotational spectroscopy.
- To elucidate the factors responsible for asparagine's unique structural properties.
Main Methods:
- High-resolution rotational spectroscopy was employed to analyze asparagine.
- Computational methods were used to support spectral assignments and conformational analysis.
Main Results:
- A single dominant conformer of asparagine was identified.
- This conformer is stabilized by an intricate intramolecular hydrogen bonding network.
- The network involves the alpha-amine, alpha-carboxylic acid, and amide groups.
Conclusions:
- Asparagine's conformational landscape is significantly simpler than other polar amino acids.
- Intramolecular hydrogen bonding dictates the unique structural preference of asparagine.
- This finding provides insights into the structural diversity of amino acids.
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