Double- to Single-Strand Transition Induces Forces and Motion in DNA Origami Nanostructures.
Double- to Single-Strand Transition Induces Forces and Motion in DNA Origami Nanostructures.
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DOI:
10.1002/adma.202101986
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发表时间:
2021-09
期刊:
影响因子:
--
通讯作者:
Liedl T
中科院分区:
文献类型:
--
作者:
Gür FN;Kempter S;Schueder F;Sikeler C;Urban MJ;Jungmann R;Nickels PC;Liedl T
The design of dynamic, reconfigurable devices is crucial for the bottom-up construction of artificial biological systems. DNA can be used as an engineering material for the de-novo design of such dynamic devices. We present a self-assembled DNA origami switch that uses the transition from double- to single-stranded DNA and vice versa to create and annihilate an entropic force that drives a reversible conformational change inside the switch. We distinctively demonstrate that a DNA single-strand that is extended with 0.34 nm per nucleotide – the extension this very strand has in the double-stranded configuration – exerts a contractive force on its ends leading to large-scale motion. We demonstrate the operation of this type of switch via transmission electron microscopy, DNA-PAINT super-resolution microscopy and darkfield microscopy. Our work illustrates the intricate and sometimes counter-intuitive forces that act in nanoscale physical systems that operate in fluids.
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DOI:
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Molecules (Basel, Switzerland)
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