Related Experiment Videos
Benjamin H Rajewski1, Madison M Wright1, Taylor A Gerrein1
1Department of Chemistry & Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States.
Organic Letters
|June 5, 2023
Summary
Backbone N-amination of glycine stabilizes polyproline type 2 (PPII) helices. N-aminoglycine (aGly) and its derivatives promote PPII conformation, aiding peptidomimetic design targeting PPII-binding domains.
Area of Science:
- Medicinal Chemistry
- Organic Chemistry
- Structural Biology
Background:
- Polyproline type 2 (PPII) helices are crucial protein secondary structures involved in various biological processes.
- Stabilizing PPII folds is key for designing peptidomimetics that can target PPII-binding domains.
- Unnatural amino acid residues offer opportunities to enhance the stability and properties of peptide structures.
Purpose of the Study:
- To investigate the effect of backbone N-amination on the stability of PPII helices.
- To explore N-aminoglycine (aGly) as a potential PPII helix stabilizer.
- To develop novel peptidomimetics with enhanced helical propensity.
Main Methods:
- Synthesis of N-aminoglycine (aGly) and its incorporation into peptide backbones.
- Derivatization of aGly-containing peptides to generate N'-alkylated analogues.
- Analysis of PPII helix stability using biophysical and structural methods (implied).
Main Results:
- N-amination of the peptide backbone effectively promotes PPII helix formation.
- N-aminoglycine (aGly) was identified as a potent promoter of PPII conformation.
- N'-alkylation of aGly residues led to analogues with significantly increased helical propensity.
Conclusions:
- Backbone N-amination of glycine is a viable strategy for stabilizing PPII conformation.
- This approach facilitates the synthesis of constrained folds for peptidomimetic drug design.
- The developed N-alkylated aGly analogues show promise for targeting PPII-binding proteins.