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Utilizing Time-Resolved Protein-Induced Fluorescence Enhancement to Identify Stable Local Conformations One α-Synuclein Monomer at a Time
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Silver-induced conformational changes of polypeptides: a CD study.

Manuela Murariu1, Ecaterina Stela Dragan, Adriana Adochitei

  • 1Petru Poni Institute of Macromolecular Chemistry, 41a Grigore Ghica Voda Alee, Iasi -700487, Romania.

Journal of Peptide Science : an Official Publication of the European Peptide Society
|May 4, 2011
PubMed
Summary
This summary is machine-generated.

Silver ions significantly alter peptide structures, promoting alpha-helices and reducing amyloid aggregation. This suggests a protective role for silver in brain pathologies due to its peptide binding affinity.

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Area of Science:

  • Biochemistry
  • Neuroscience
  • Materials Science

Background:

  • The precise role of silver ions in pathologies and their impact on peptide structure remain unclear.
  • Understanding silver-peptide interactions is crucial for potential therapeutic applications.

Purpose of the Study:

  • To investigate silver ion-induced conformational changes in synthesized peptides.
  • To explore the influence of pH on these silver-peptide interactions.

Main Methods:

  • Circular Dichroism (CD) spectroscopy to analyze peptide conformation.
  • Synthesis of various peptides with different residues.
  • Fourier transform infrared spectroscopy (FTIR) and mass spectrometry for validation.

Main Results:

  • A glycine-based, histidine-containing peptide shifted from random coil/β-turn to α-helices upon silver binding.
  • Silver ions induced similar conformational changes in bradykinin.
  • Silver ions decreased the aggregation propensity of amyloid-β peptides.

Conclusions:

  • Silver ions exhibit a specific affinity for physiologically active peptides.
  • Results indicate a potential protective role for silver ions in brain pathologies.
  • Silver's influence on peptide conformation may underlie its therapeutic potential.