Part:BBa_K1614007
HRP-mimicking DNAzyme
Notice: Functional DNA
This part is a sequence of a functional ssDNA. It is only active as single-stranded DNA. It can not be cloned into a plasmid. For use order it as a DNA oligo.
A DNAzyme with peroxidase acivity. (Travascio, P., Li, Y., and Sen, D. (1998). DNA-enhanced peroxidase activity of a DNA-aptamer-hemin complex. Chemistry & biology 5, 505-517.) It forms a G-quadruplex structure in which hemin can be incorporated. This enables it to catalyze the fission of hydrogen peroxide to water and a reactive oxygen species (ROS). Thus it can be used to catalyze chemiluminescence and a series of colorimetric reactions, known from the horseraddish peroxidase from Amoracia rusticana. This part can be joined to other functional DNA.
The HRP DNAzyme's catalytic activity has been shown to be modulated by hemin concentration, where the optimum is achieved at equimolar concentrations. Further conditions for optimal activity are a pH of 8.5, no special metals are required. note that at non basic pH, and without further solvent or detergent (e.g Triton-X100), hemin will not dissolve in water, which will result in loss of activity. If the DNAzyme-hemin solution produces a brown-red precipitate, hemin is not dissolved and pH should be raised. Optimal concentration of DNAzyme for readout applications was determined to be 1 µM.
Usage and Biology
Sequence and Features
- 10COMPATIBLE WITH RFC[10]
- 12COMPATIBLE WITH RFC[12]
- 21COMPATIBLE WITH RFC[21]
- 23COMPATIBLE WITH RFC[23]
- 25COMPATIBLE WITH RFC[25]
- 1000COMPATIBLE WITH RFC[1000]
//dna
//dna/dnazyme
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