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Updated: Jul 17, 2026
13:42
Solid-phase Submonomer Synthesis of Peptoid Polymers and their Self-Assembly into Highly-Ordered Nanosheets
Published on: November 2, 2011
Peptide--water association in peptide crystals
International Journal of Peptide and Protein Research
|July 1, 1979
Summary
This study analyzed peptide crystal structures to understand water interactions. Peptide carbonyls are more frequently hydrated than N--H groups, with specific geometric preferences observed for water molecules.
Area of Science:
- Biophysics
- Structural Biology
- Crystallography
Background:
- Understanding peptide hydration is crucial for molecular interactions.
- Previous studies have focused on bulk water, but specific peptide backbone hydration geometry remains less defined.
Purpose of the Study:
- To investigate the geometric preferences of water molecules hydrating peptide backbones.
- To quantify the frequency and geometry of hydrogen bonds between water and peptide groups.
Main Methods:
- Surveyed the structures of 37 peptide crystals.
- Analyzed 78 water-peptide hydrogen bonds and 77 other water-involved hydrogen bonds.
- Determined the angles and spatial arrangements of water molecules relative to peptide atoms.
Main Results:
- Peptide carbonyl hydration occurred more frequently than N--H hydration.
- The most probable angle for C'=O ... O water was approximately 138 degrees.
- Water molecules often adopted positions within the plane of the peptide bond, with tetrahedral angles between hydrogen bonds.
Conclusions:
- Peptide backbone hydration exhibits specific geometric preferences.
- Carbonyl oxygen is a primary site for water interaction in peptides.
- Observed geometries suggest a role for water in stabilizing peptide structures.
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