Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 142, Issue 22, Pages 10153-10162Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.0c03129
Keywords
-
Categories
Funding
- JSPS KAKENHI [JP16K14029, JP18H02081, JP26248016, JP16H06509]
- Foundation for the Promotion of Ion Engineering
- Noguchi Institute
Ask authors/readers for more resources
Allosteric regulation is gaining increasing attention as a basis for the production of stimuli-responsive materials in many research areas including DNA nanotechnology. We expected that metal-mediated artificial base pairs, consisting of ligand-type nucleotides and a bridging metal ion, could serve as allosteric units that regulate the function of DNA molecules. In this study, we established a rational design strategy for developing Cu-II-responsive allosteric DNAzymes by incorporating artificial hydroxypyridone ligand-type nucleotides (H) that form a Cu-II-mediated base pair (H-Cu-II-H). We devised a new enzymatic method using a standard DNA polymerase and a ligase to prepare DNA strands containing H nucleotides. Previously reported DNAzymes were modified by introducing a H-H pair into the stem region, and the stem-loop sequences were altered so that the structure becomes catalytically inactive in the absence of Cu-II ions. The formation of a H-Cu-II-H base pair triggers intrastrand transformation from the inactive to the active structure, enabling allosteric regulation of the DNAzyme activity in response to Cu-II ions. The activity of the H-modified DNAzyme was reversibly switched by the addition and removal of Cu-II ions under isothermal conditions. Similarly, by incorporating a H-Cu-II-H pair into an in vitro-selected Ag-I-dependent DNAzyme, we have developed a DNAzyme that exhibits an AND logic-gate response to Cu(II )and Ag-I ions. The rational design strategy and the easy enzymatic synthetic method presented here provide a versatile way to develop a variety of metal-responsive allosteric DNA materials, including molecular machines and logic circuits, based on metal-mediated artificial base pairing.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available