Peptide-Appended Permethylated β-Cyclodextrins with Hydrophilic and Hydrophobic Spacers

Bioconjug Chem. 2017 Aug 16;28(8):2160-2166. doi: 10.1021/acs.bioconjchem.7b00319. Epub 2017 Jul 26.

Abstract

A novel synthetic methodology, employing a combination of the strain-promoted azide-alkyne cycloaddition and maleimide-thiol reactions, for the preparation of permethylated β-cyclodextrin-linker-peptidyl conjugates is reported. Two different bifunctional maleimide cross-linking probes, the polyethylene glycol containing hydrophilic linker bicyclo[6.1.0] nonyne-maleimide and the hydrophobic 5'-dibenzoazacyclooctyne-maleimide, were attached to azide-appended permethylated β-cyclodextrin. The successfully introduced maleimide function was exploited to covalently graft a cysteine-containing peptide (Ac-Tyr-Arg-Cys-Amide) to produce the target conjugates. The final target compounds were isolated in high purity after purification by isocratic preparative reverse-phase high-performance liquid chromatography. This novel synthetic approach is expected to give access to many different cyclodextrin-linker peptides.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alkynes / chemistry
  • Amino Acid Sequence
  • Azides / chemistry
  • Hydrophobic and Hydrophilic Interactions*
  • Maleimides / chemistry
  • Methylation
  • Oligopeptides / chemistry*
  • Sulfhydryl Compounds / chemistry
  • beta-Cyclodextrins / chemistry*

Substances

  • Alkynes
  • Azides
  • Maleimides
  • Oligopeptides
  • Sulfhydryl Compounds
  • beta-Cyclodextrins
  • maleimide