A novel 34 amino acid long collagen-like peptide rich in proline, hydroxyproline, and glycine, and with several photoreactive N-acyl-7-nitroindoline units incorporated into the peptide backbone was synthesized by on-resin fragment condensation. The circular dichroism measurement of this peptide supports a stable triple helix structure. This peptide has potential as a new biomimetic material with built-in latent photochemical functions that enable the decomposition into small peptide fragments by illumination with UV light of 350 nm. Using a photoreactive glycine derivative as a model compound for the collagen-like peptide, we demonstrate that its photolysis can also be triggered by a two-photon absorption process using a femtosecond laser at 710 nm. When a thin film of this compound is irradiated with femtosecond laser light at 710 nm the photochemistry occurs only at locations of irradiation. In addition, the collagen-like peptide is able to support mesenchymal stem cell growth, indicating its non-toxicity to these cells and its potential in tissue engineering applications.
Synthesis and characterization of a photocleavable collagen-like peptide
作者:Alfredo Ornelas、Kaitlyn N. Williams、Kevin A. Hatch、Aurelio Paez、Angela C. Aguilar、Cameron C. Ellis、Nishat Tasnim、Supriyo Ray、Carl W. Dirk、Thomas Boland、Binata Joddar、Chunqiang Li、Katja Michael
DOI:10.1039/c7ob02198d
日期:——
long collagen-like peptide rich in proline, hydroxyproline, and glycine, and with four photoreactive N-acyl-7-nitroindoline units incorporated into the peptide backbone was synthesized by on-resin fragment condensation. Its circular dichroism supports a stable triple helix structure. The built-in photochemical function enables the decomposition of the peptide into small peptide fragments by illumination
Virtually epimerization-free synthesis of peptide-α-thioesters
作者:Tyrone J. Hogenauer、Qianli Wang、Aditya K. Sanki、Amy J. Gammon、Cherie H. L. Chu、Clyde M. Kaneshiro、Yasuhiro Kajihara、Katja Michael
DOI:10.1039/b618442a
日期:——
Under slightly basic or neutral reaction conditions peptide-α-thioesters are photochemically synthesized from peptide-α-nitroindoline precursors, either in solution, or by direct photorelease from a solid support.