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Issue 4, 2021

DNA modification and visualization on an origami-based enzyme nano-factory

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Abstract

The past decade has seen enormous progress in DNA nanotechnology through the advent of DNA origami. Functionalizing the DNA origami for multiple applications is the recent focus of this field. Here we have constructed a novel DNA enzyme nano-factory, which modifies target DNA embedded on a DNA origami platform. The enzyme is programmed to reside in close proximity to the target DNA which enhances significantly the local concentration compared to solution-based DNA modification. To demonstrate this we have immobilized DNA methyltransferase M·TaqI next to the target DNA on the DNA origami and used this enzyme to sequence-specifically modify the target DNA with biotin using a cofactor analogue. Streptavidin binding to biotin is applied as a topographic marker to follow the machine cycle of this enzyme nano-factory using atomic force microscopy imaging. The nano-factory is demonstrated to be recyclable and holds the potential to be expanded to a multi-enzyme, multi-substrate operating system controlled by simple to complex molecules made of DNA, RNA or proteins.

Graphical abstract: DNA modification and visualization on an origami-based enzyme nano-factory

Supplementary files

Article information


Submitted
23 Oct 2020
Accepted
18 Dec 2020
First published
21 Dec 2020

Nanoscale, 2021,13, 2465-2471
Article type
Paper

DNA modification and visualization on an origami-based enzyme nano-factory

E. Weinhold and B. Chakraborty, Nanoscale, 2021, 13, 2465 DOI: 10.1039/D0NR07618J

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