Journal
ANALYTICAL CHEMISTRY
Volume 81, Issue 21, Pages 9114-9119Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ac901773b
Keywords
-
Categories
Funding
- Israel Science Foundation
Ask authors/readers for more resources
Engineered nucleic acid hairpin structures are used for the amplified analysis of low-molecular-weight substrates (adenosine monophosphate, AMP) or proteins (lysozyme). The hairpin structures consist of the anti-AMP or antilysozyme aptamer units linked to the horseradish peroxidase (HRP)-mimicking DNAzyme sequence. The HRP-mimicking DNAzyme sequence is protected in a caged, inactive structure in the stem regions of the respective hairpins, whereas the loop regions include a part of the respective aptamer sequence. The opening of the hairpins by the analytes, AMP or lysozyme, through the formation of the respective analyte-aptamer complexes, results in the self-assembly of the active HRP-mimicking DNAzyme. The DNAzyme catalyzes the H2O2-mediated oxidation of 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS(2)-) to the colored ABTS(center dot-), thus providing the amplified optical detection of the respective analytes. The engineered aptamer-DNAzyme hairpin structures reveal significantly improved analytical performance, as compared to analogous fluorophore-quencher-labeled hairpins.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available