Proximity-Induced Pattern Operations in Reconfigurable DNA Origami Domino Array.

Molecular patterns with nanoscale precision have been used to mimic complex molecular networks. One key challenge in molecular patterns is to perform active pattern operations in controllable systems to fully imitate their complex dynamic behaviors. Here, we present a reconfigurable DNA origami domino array-based dynamic pattern operation (DODA DPO) system to perform proximity-induced molecular control for complex pattern operations. The activatable platform of reconfigurable DODA endows a spontaneous cascade of stacking conformational transformation from the "before" to the "after" conformation by a set of "trigger" DNA strands. The conformational transformation further brings the operational pattern units into close proximity to undergo DNA strand displacement cascades to accomplish three different pattern operations of "writing", "erasing", and "shifting". Our results also demonstrate the reconfigurable DODA DPO system provides a useful basis to study various molecular control analysis in a fully programmable and controllable fashion.