title: Design and synthesis of a novel enediynyl pentapeptide with predominantly beta-turn structural motif and its potential as a fluorescence-based chemosensor.
abstract: A novel enediynyl pentapeptide in the protected form 1 was synthesized and characterized. It exists predominantly in beta-turn structural motif as revealed by variable temperature NMR and CD spectroscopy. In the presence of transition metal ions and gold nanoparticles, the fluorescence intensity of the peptide got enhanced with remarkable quantum yield with the Z-enediynyl -amino acid acting as a fluorophoric reporter. The interesting photophysical behaviors with alkali and alkaline earth metal ions are also reported.
authors.affiliation: Bioorganic Laboratory, Department of Chemistry, Indian Institute of Technology, Kharagpur 721 302, India. absk@chem.iitkgp.ernet.in
authors.forename: Amit
authors.initials: A
authors.lastname: Basak
authors.forename: Subhendu Sekhar
authors.initials: SS
authors.lastname: Bag
authors.forename: Ajoy
authors.initials: A
authors.lastname: Basak
mesh_terms: D015195:Drug Design; D005453:Fluorescence; D005470:Fluorometry; D006046:Gold / Q000737:chemistry; D009842:Oligopeptides / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D017433:Protein Structure, Secondary; D011743:Pyrimidines / Q000138:chemical synthesis / Q000494:pharmacology; D028561:Transition Elements / Q000737:chemistry*
chemical_list: D009842:Oligopeptides; D011743:Pyrimidines; D028561:Transition Elements; D006046:Gold