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Göpfrich, Kerstin; Li, Chen-Yu; Ricci, Maria; Bhamidimarri, Satya Prathyusha; Yoo, Jejoong; Gyenes, Bertalan; Ohmann, Alexander; Winterhalter, Mathias; Aksimentiev, Aleksei; Keyser, Ulrich F
ACS nano, 09/2016, Letnik: 10, Številka: 9Journal Article
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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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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