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Development and Characterization of Light-Responsive Peptide Macrocycles.

Lena Sobze1, Ratmir Derda2

  • 1Department of Chemistry, University of Alberta, Edmonton, AB, Canada. sobze@ualberta.ca.

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Summary

Researchers developed a method to synthesize light-responsive (LR) macrocycles from peptides. These molecules, using azobenzene, can switch biological functions on and off with visible light, advancing photopharmacology.

Keywords:
AzobenzeneBicyclicBioactive ligandLight-responsiveLinchpinsMacrocyclic peptidesModificationThiol

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Area of Science:

  • Medicinal Chemistry
  • Biochemistry
  • Photopharmacology

Background:

  • Photopharmacology and optochemical genetics utilize molecules that reversibly control biological functions with light.
  • Existing light-responsive (LR) molecules include small molecules, peptide macrocycles, and protein conjugates.

Purpose of the Study:

  • To describe a method for synthesizing light-responsive (LR) macrocycles from linear peptides.
  • To enable the creation of bioactive LR molecules by modifying peptides with photo-switchable moieties.

Main Methods:

  • Synthesis of macrocyclic peptides from 20 natural amino acids.
  • Grafting of azobenzene or other light-responsive structures onto linear peptides.
  • Constraining the resulting macrocyclic peptide with an azobenzene moiety.

Main Results:

  • A method for producing light-responsive (LR) macrocycles from linear peptides was successfully developed.
  • The synthesized macrocyclic peptides contain two loops constrained by an azobenzene moiety.
  • The azobenzene moiety allows the macrocycle to change conformation in response to visible light.

Conclusions:

  • This method provides a pathway for creating novel light-responsive peptide macrocycles.
  • The developed LR macrocycles hold potential for applications in photopharmacology and optochemical genetics.
  • Azobenzene-constrained peptides offer a versatile platform for light-controlled biological activity.