An on-demand four-way junction DNAzyme nanoswitch driven by inosine-based partial strand displacement.

A DNA four-way junction device capable of junction expansion and contraction cycles using an inosine-based partial strand displacement scheme is reported. These nanoscale positioning capabilities are used to provide on-demand activation and deactivation of a pair of split E6 DNAzymes on the device. The device also demonstrates a combined catalytic rate significantly higher than the original E6 DNAzyme under similar operational conditions. This approach can provide structural organization and spatially control other multicomponent molecular complexes.