Bisazide Cyanine Dyes as Fluorogenic Probes for Bis-Cyclooctynylated Peptide Tags and as Fluorogenic Cross-Linkers of Cyclooctynylated Proteins

Bioconjug Chem. 2017 May 17;28(5):1552-1559. doi: 10.1021/acs.bioconjchem.7b00178. Epub 2017 Apr 28.

Abstract

Herein we present the synthesis and fluorogenic characterization of a series of double-quenched bisazide cyanine probes with emission maxima between 565 and 580 nm that can participate in covalent, two-point binding bioorthogonal tagging schemes in combination with bis-cyclooctynylated peptides. Compared to other fluorogenic cyanines, these double-quenched systems showed remarkable fluorescence intensity increase upon formation of cyclic dye-peptide conjugates. Furthermore, we also demonstrated that these bisazides are useful fluorogenic cross-linking platforms that are able to form a covalent linkage between monocyclooctynylated proteins.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Azides / chemistry*
  • Carbocyanines / chemistry*
  • Fluorescence
  • Fluorescent Dyes / chemistry*
  • Green Fluorescent Proteins / chemistry*
  • Molecular Structure
  • Peptide Fragments / chemistry*

Substances

  • Azides
  • Carbocyanines
  • Fluorescent Dyes
  • Peptide Fragments
  • Green Fluorescent Proteins