The design of cyclic AMP--recognizing oligopeptides and evaluation of its capability for cyclic AMP recognition using an electrochemical system.
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.
Katayama
Y
Y
Department of Materials Physics and Chemistry, Graduate School of Engineering, Kyushu University, Fukuoka, Japan.
Ohuchi
Y
Y
Higashi
H
H
Kudo
Y
Y
Maeda
M
M
D000242:Cyclic AMP / Q000032:analysis*; D004563:Electrochemistry; D008024:Ligands; D009842:Oligopeptides / Q000378:metabolism*
D008024:Ligands; D009842:Oligopeptides; D000242:Cyclic AMP