Large-Conductance Transmembrane Porin Made from DNA Origami.
Large-Conductance Transmembrane Porin Made from DNA Origami.
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DOI:
10.1021/acsnano.6b03759
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发表时间:
2016-09-27
期刊:
影响因子:
17.1
通讯作者:
Keyser, Ulrich F.
中科院分区:
文献类型:
--
作者:
Gopfrich, Kerstin;Li, Chen-Yu;Ricci, Maria;Bhamidimarri, Satya Prathyusha;Yoo, Jejoong;Gyenes, Bertalan;Ohmann, Alexander;Winterhalter, Mathias;Aksimentiev, Aleksei;Keyser, Ulrich F.
DNA nanotechnology allows for the creation of three-dimensional structures at nanometer scale. Here, we use DNA to build the largest synthetic pore in a lipid membrane to date, approaching the dimensions of the nuclear pore complex and increasing the pore-area and the conductance 10-fold compared to previous man-made channels. In our design, 19 cholesterol tags anchor a megadalton funnel-shaped DNA origami porin in a lipid bilayer membrane. Confocal imaging and ionic current recordings reveal spontaneous insertion of the DNA porin into the lipid membrane, creating a transmembrane pore of tens of nanosiemens conductance. All-atom molecular dynamics simulations characterize the conductance mechanism at the atomic level and independently confirm the DNA porins’ large ionic conductance.
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