title: The design of cyclic AMP--recognizing oligopeptides and evaluation of its capability for cyclic AMP recognition using an electrochemical system.
abstract: A novel 17-mer peptide ligand for cyclic AMP was designed using the amino acid sequences of essential subsites in various cyclic AMP-dependent protein kinase (protein kinase A) families. The Au disk electrode, which was modified with the designed 17-mer oligopeptide, responded to cyclic AMP but virtually did not respond to any other cyclic nucleotides using the ion channel sensor mechanism. On the other hand, a scrambled peptide, which had the same amino acid composition as and had an amino acid sequence different from the 17-mer oligopeptide, did not respond to any nucleotides. This indicates that the designed 17-mer peptide actually acted as a selective ligand for cyclic AMP. This ligand-designing strategy using peptide sequences in target-binding proteins may possibly be extended to the design of peptide ligands for other second messengers.
authors.affiliation: Department of Materials Physics and Chemistry, Graduate School of Engineering, Kyushu University, Fukuoka, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Katayama
authors.forename: Y
authors.initials: Y
authors.lastname: Ohuchi
authors.forename: H
authors.initials: H
authors.lastname: Higashi
authors.forename: Y
authors.initials: Y
authors.lastname: Kudo
authors.forename: M
authors.initials: M
authors.lastname: Maeda
mesh_terms: D000242:Cyclic AMP / Q000032:analysis*; D004563:Electrochemistry; D008024:Ligands; D009842:Oligopeptides / Q000378:metabolism*
chemical_list: D008024:Ligands; D009842:Oligopeptides; D000242:Cyclic AMP