A catalytic triplex DNAzyme for porphyrin metalation

Trihydroxyphenyl porphyrin (POH3) was designed to specifically bind with a triplex DNA resulting in a turn-on fluorescence response. This ensemble can be developed into a catalytic triplex DNAzyme towards porphyrin metalation. The catalytic activity is initiated by the enhanced basicity of POH3 upon binding with the triplex DNA.