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Issue 3, 2005
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Tethered DNA hairpins facilitate electrochemical detection of DNA ligation

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Abstract

A novel electrochemical assay for DNA ligase activity is described. The assay exploits the properties of DNA hairpins tethered at one terminus to a gold electrode and labelled at the other with a ferrocene group for rapid characterisation of DNA status by cyclic voltammetry. Successful ligation of ‘nicked’ DNA hairpins is indicated by retention of the ferrocene couple when exposure to DNA ligase is followed by conditions that denature the hairpin. The results demonstrate the simplicity of integrating electrochemical detection with hairpin based biosensors and illustrate a new approach to the assay of DNA ligases, of which the NAD+-dependent enzymes represent a potential broad spectrum antibacterial drug target.

Graphical abstract: Tethered DNA hairpins facilitate electrochemical detection of DNA ligation

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Supplementary files

Article information


Submitted
02 Sep 2004
Accepted
22 Dec 2004
First published
19 Jan 2005

Analyst, 2005,130, 345-349
Article type
Paper

Tethered DNA hairpins facilitate electrochemical detection of DNA ligation

G. Zauner, Y. Wang, M. Lavesa-Curto, A. MacDonald, A. G. Mayes, R. P. Bowater and J. N. Butt, Analyst, 2005, 130, 345
DOI: 10.1039/B413556C

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