A biosensor based on multifunctional allostery for dynamic analysis of circulating tumor DNA.

Here, a new strategy based on artificial multifunctional allostery (mFA) was explored to regulate the assembly of a DNA nanowire using circulating tumor DNA (ctDNA) as the initiator. Given its unique properties, the mFA-regulated versatile DNA nanowire was applied to engineer a single-step, amplified and dynamic biosensor for the quantitative analysis of ctDNA in serum samples with tunable sensitivity and selectivity.