Electrochemical sensing for the determination of activated cyclic AMP-dependent protein kinase

Y. Katayama, S. Sakakihara, M. Maeda

    Research output: Contribution to journalArticlepeer-review

    13 Citations (Scopus)

    Abstract

    A novel electrochemical system has been developed for monitoring the cyclic AMP-dependent protein kinase (PKA) activity. In this method, PKA activity was monitored as the change in the redox current of a ferrocene-pendant PKA substrate peptide (Fe-LRRASLG) on a gold electrode, which had been modified with thioctic acid, using cyclic voltammetry. The phosphrylation of the ferrocene-pendant substrate with PKA changed the net charge from +1 to -1. This caused a decrease in the redox current of the ferrocene unit due to an electrostatic repulsion between the substrate and the anionic surface of the electrode. We expect that this method is potentially useful for monitoring the enzyme activity in medical or pharmacological fields.

    Original languageEnglish
    Pages (from-to)17-19
    Number of pages3
    Journalanalytical sciences
    Volume17
    Issue number1
    DOIs
    Publication statusPublished - Jan 1 2001

    All Science Journal Classification (ASJC) codes

    • Analytical Chemistry

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